<?php

namespace App\Services;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Exception;

class MagentoCategoryMigrationService
{
    protected $magento1Connection;
    protected $magento2Connection;
    protected $magento1Prefix;
    protected $magento2Prefix;
    protected $storeMapping = [];
    protected $categoryMapping = [];
    protected $migrationLog = [];
    protected $addedCount = 0;
    protected $existingCount = 0;

    public function __construct()
    {
        $this->magento1Connection = 'magento1';
        $this->magento2Connection = 'magento2';
        $this->magento1Prefix = config('database.connections.magento1.prefix', '');
        $this->magento2Prefix = config('database.connections.magento2.prefix', '');
    }

    /**
     * Get all stores from Magento 1
     */
    public function getMagento1Stores()
    {
        try {
            $stores = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'core_store')
                ->select('store_id', 'code', 'name', 'website_id', 'group_id')
                ->where('store_id', '>', 0)
                ->get();

            return $stores;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 1 stores: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get all stores from Magento 2
     */
    public function getMagento2Stores()
    {
        try {
            $stores = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'store')
                ->select('store_id', 'code', 'name', 'website_id')
                ->where('store_id', '>', 0)
                ->get();

            return $stores;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 2 stores: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get all categories from Magento 1 for a specific store
     */
    public function getMagento1Categories($storeId = null)
    {
        try {
            // Get entity type ID
            $entityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get attribute IDs
            $nameAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');

            $isActiveAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'is_active')
                ->value('attribute_id');

            $urlKeyAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'url_key')
                ->value('attribute_id');

            $targetStoreId = $storeId ?? 0;

            // Get base category data
            $categories = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'catalog_category_entity')
                ->select('entity_id', 'parent_id', 'level', 'path', 'position')
                ->orderBy('level')
                ->orderBy('position')
                ->get();

            // Get attribute values
            $nameValues = [];
            $isActiveValues = [];
            $urlKeyValues = [];

            if ($nameAttributeId) {
                $nameValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_category_entity_varchar')
                    ->where('attribute_id', $nameAttributeId)
                    ->where('store_id', $targetStoreId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
            }

            if ($isActiveAttributeId) {
                $isActiveValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_category_entity_int')
                    ->where('attribute_id', $isActiveAttributeId)
                    ->where('store_id', $targetStoreId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
            }

            if ($urlKeyAttributeId) {
                $urlKeyValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_category_entity_varchar')
                    ->where('attribute_id', $urlKeyAttributeId)
                    ->where('store_id', $targetStoreId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
            }

            // Combine data
            return $categories->map(function($category) use ($nameValues, $isActiveValues, $urlKeyValues) {
                $category->name = $nameValues[$category->entity_id] ?? null;
                $category->is_active = $isActiveValues[$category->entity_id] ?? null;
                $category->url_key = $urlKeyValues[$category->entity_id] ?? null;
                return $category;
            });
        } catch (Exception $e) {
            Log::error('Error fetching Magento 1 categories: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get all categories from Magento 2 for a specific store
     */
    public function getMagento2Categories($storeId = null)
    {
        try {
            // Get entity type ID
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get attribute IDs
            $nameAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');

            $isActiveAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'is_active')
                ->value('attribute_id');

            $urlKeyAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'url_key')
                ->value('attribute_id');

            $targetStoreId = $storeId ?? 0;

            // Get base category data
            $categories = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity')
                ->select('entity_id', 'parent_id', 'level', 'path', 'position')
                ->orderBy('level')
                ->orderBy('position')
                ->get();

            // Get attribute values
            $nameValues = [];
            $isActiveValues = [];
            $urlKeyValues = [];

            if ($nameAttributeId) {
                $nameValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity_varchar')
                    ->where('attribute_id', $nameAttributeId)
                    ->where('store_id', $targetStoreId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
            }

            if ($isActiveAttributeId) {
                $isActiveValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity_int')
                    ->where('attribute_id', $isActiveAttributeId)
                    ->where('store_id', $targetStoreId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
            }

            if ($urlKeyAttributeId) {
                $urlKeyValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity_varchar')
                    ->where('attribute_id', $urlKeyAttributeId)
                    ->where('store_id', $targetStoreId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
            }

            // Combine data
            return $categories->map(function($category) use ($nameValues, $isActiveValues, $urlKeyValues) {
                $category->name = $nameValues[$category->entity_id] ?? null;
                $category->is_active = $isActiveValues[$category->entity_id] ?? null;
                $category->url_key = $urlKeyValues[$category->entity_id] ?? null;
                return $category;
            });
        } catch (Exception $e) {
            Log::error('Error fetching Magento 2 categories: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Find categories in Magento 2 that don't exist in Magento 1
     * Compares by category name (case-insensitive)
     */
    public function getM2CategoriesNotInM1()
    {
        try {
            $m1Categories = $this->getMagento1Categories();
            $m2Categories = $this->getMagento2Categories();

            // Create a set of M1 category names (case-insensitive, normalized)
            $m1CategoryNames = $m1Categories->map(function($cat) {
                return strtolower(trim($cat->name ?? ''));
            })->filter(function($name) {
                return !empty($name);
            })->unique()->toArray();

            // Get all M2 categories to build a map for root category lookup
            $m2CategoryMap = [];
            foreach ($m2Categories as $cat) {
                $m2CategoryMap[$cat->entity_id] = $cat;
            }

            // Find M2 categories that don't have a matching name in M1
            $missingCategories = $m2Categories->filter(function($m2Cat) use ($m1CategoryNames) {
                $m2Name = strtolower(trim($m2Cat->name ?? ''));
                return !empty($m2Name) && !in_array($m2Name, $m1CategoryNames);
            })->map(function($m2Cat) use ($m2CategoryMap) {
                // Extract root category ID from path (typically second element: 1/2/3/4 -> 2)
                $rootCategoryId = null;
                $rootCategoryName = 'N/A';
                
                if (!empty($m2Cat->path)) {
                    $pathParts = explode('/', $m2Cat->path);
                    // Root category is typically at index 1 (second element)
                    if (count($pathParts) > 1 && isset($pathParts[1])) {
                        $rootCategoryId = (int)$pathParts[1];
                        
                        // Get root category name if it exists in our map
                        if (isset($m2CategoryMap[$rootCategoryId])) {
                            $rootCategoryName = $m2CategoryMap[$rootCategoryId]->name ?? "ID: {$rootCategoryId}";
                        } else {
                            $rootCategoryName = "ID: {$rootCategoryId}";
                        }
                    }
                }
                
                // Add root category info to the category object
                $m2Cat->root_category_id = $rootCategoryId;
                $m2Cat->root_category_name = $rootCategoryName;
                
                return $m2Cat;
            })->values();

            return $missingCategories;
        } catch (Exception $e) {
            Log::error('Error finding M2 categories not in M1: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Find categories in Magento 1 that don't exist in Magento 2
     * Compares by category name (case-insensitive)
     */
    public function getM1CategoriesNotInM2()
    {
        try {
            $m1Categories = $this->getMagento1Categories();
            $m2Categories = $this->getMagento2Categories();

            // Create a set of M2 category names (case-insensitive, normalized)
            $m2CategoryNames = $m2Categories->map(function($cat) {
                return strtolower(trim($cat->name ?? ''));
            })->filter(function($name) {
                return !empty($name);
            })->unique()->toArray();

            // Get all M1 categories to build a map for root category lookup
            $m1CategoryMap = [];
            foreach ($m1Categories as $cat) {
                $m1CategoryMap[$cat->entity_id] = $cat;
            }

            // Find M1 categories that don't have a matching name in M2
            $missingCategories = $m1Categories->filter(function($m1Cat) use ($m2CategoryNames) {
                $m1Name = strtolower(trim($m1Cat->name ?? ''));
                return !empty($m1Name) && !in_array($m1Name, $m2CategoryNames);
            })->map(function($m1Cat) use ($m1CategoryMap) {
                // Extract root category ID from path (typically second element: 1/2/3/4 -> 2)
                $rootCategoryId = null;
                $rootCategoryName = 'N/A';
                
                if (!empty($m1Cat->path)) {
                    $pathParts = explode('/', $m1Cat->path);
                    // Root category is typically at index 1 (second element)
                    if (count($pathParts) > 1 && isset($pathParts[1])) {
                        $rootCategoryId = (int)$pathParts[1];
                        
                        // Get root category name if it exists in our map
                        if (isset($m1CategoryMap[$rootCategoryId])) {
                            $rootCategoryName = $m1CategoryMap[$rootCategoryId]->name ?? "ID: {$rootCategoryId}";
                        } else {
                            $rootCategoryName = "ID: {$rootCategoryId}";
                        }
                    }
                }
                
                // Add root category info to the category object
                $m1Cat->root_category_id = $rootCategoryId;
                $m1Cat->root_category_name = $rootCategoryName;
                
                return $m1Cat;
            })->values();

            return $missingCategories;
        } catch (Exception $e) {
            Log::error('Error finding M1 categories not in M2: ' . $e->getMessage());
            return collect([]);
        }
    }

    protected function getCategoryProductCounts($categoryIds, $source = 'm2')
    {
        if (empty($categoryIds)) {
            return [];
        }

        try {
            $connection = $source === 'm1' ? $this->magento1Connection : $this->magento2Connection;
            $prefix = $source === 'm1' ? $this->magento1Prefix : $this->magento2Prefix;
            $tableName = $prefix . 'catalog_category_product';

            // Check if table exists
            try {
                $productCounts = DB::connection($connection)
                    ->table($tableName)
                    ->whereIn('category_id', $categoryIds)
                    ->select('category_id', DB::raw('COUNT(product_id) as product_count'))
                    ->groupBy('category_id')
                    ->pluck('product_count', 'category_id')
                    ->toArray();
            } catch (Exception $e) {
                // Table might not exist, return empty array
                Log::warning("Table {$tableName} might not exist: " . $e->getMessage());
                return [];
            }

            return $productCounts;
        } catch (Exception $e) {
            Log::error("Error getting product counts: " . $e->getMessage());
            return [];
        }
    }

    /**
     * Build hierarchical category tree structure
     */
    public function buildCategoryTreeHierarchy($categories, $source = 'm2')
    {
        $categoryMap = [];
        $rootCategories = [];

        // Get all category IDs
        $categoryIds = $categories->pluck('entity_id')->toArray();
        
        // Get product counts for all categories
        $productCounts = $this->getCategoryProductCounts($categoryIds, $source);

        // First pass: create a map of all categories with children array
        foreach ($categories as $category) {
            $categoryId = $category->entity_id;
            $categoryMap[$categoryId] = [
                'id' => $categoryId,
                'name' => $category->name ?? 'Unnamed Category',
                'parent_id' => $category->parent_id,
                'level' => $category->level ?? 0,
                'position' => $category->position ?? 0,
                'is_active' => $category->is_active ?? 0,
                'path' => $category->path ?? '',
                'product_count' => $productCounts[$categoryId] ?? 0,
                'children' => []
            ];
        }

        // Second pass: build the tree structure by assigning children to parents
        foreach ($categoryMap as $id => $category) {
            $parentId = $category['parent_id'];
            
            // Skip if parent is self (prevent circular references)
            if ($parentId == $id) {
                $rootCategories[] = &$categoryMap[$id];
                continue;
            }
            
            // Check if this is a root category (parent is 0, 1, or doesn't exist in map)
            if ($parentId == 0 || $parentId == 1 || !isset($categoryMap[$parentId])) {
                $rootCategories[] = &$categoryMap[$id];
            } else {
                // Add as child of parent
                $categoryMap[$parentId]['children'][] = &$categoryMap[$id];
            }
        }

        // Sort function for categories
        $sortCategories = function(&$categories) use (&$sortCategories) {
            usort($categories, function($a, $b) {
                return $a['position'] <=> $b['position'];
            });
            // Recursively sort children
            foreach ($categories as &$category) {
                if (!empty($category['children'])) {
                    $sortCategories($category['children']);
                }
            }
        };

        // Sort root categories and all children recursively
        $sortCategories($rootCategories);

        return $rootCategories;
    }

    /**
     * Migrate categories from Magento 1 to Magento 2
     */
    public function migrateCategories($storeMapping = [])
    {
        $this->storeMapping = $storeMapping;
        $this->migrationLog = [];
        $this->categoryMapping = [];
        $this->addedCount = 0;
        $this->existingCount = 0;

        try {
            DB::connection($this->magento2Connection)->beginTransaction();

            // Get root category ID for Magento 2 (usually 2)
            $rootCategoryId = $this->getMagento2RootCategoryId();

            // Get all categories from Magento 1
            $m1Categories = $this->getMagento1Categories();

            // Build category tree
            $categoryTree = $this->buildCategoryTree($m1Categories);

            // Migrate categories level by level
            foreach ($categoryTree as $level => $categories) {
                foreach ($categories as $m1Category) {
                    $this->migrateCategory($m1Category, $rootCategoryId);
                }
            }

            // Update children_count for all affected parent categories
            $this->updateChildrenCounts();

            // Migrate category attributes for each store
            foreach ($this->storeMapping as $m1StoreId => $m2StoreId) {
                $this->migrateCategoryAttributes($m1StoreId, $m2StoreId);
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => 'Categories migrated successfully',
                'migrated_count' => count($this->categoryMapping),
                'added_count' => $this->addedCount,
                'existing_count' => $this->existingCount,
                'log' => $this->migrationLog
            ];

        } catch (Exception $e) {
            DB::connection($this->magento2Connection)->rollBack();
            Log::error('Category migration error: ' . $e->getMessage());
            
            return [
                'success' => false,
                'message' => 'Migration failed: ' . $e->getMessage(),
                'log' => $this->migrationLog
            ];
        }
    }

    /**
     * Build category tree organized by level
     */
    protected function buildCategoryTree($categories)
    {
        $tree = [];
        foreach ($categories as $category) {
            $level = $category->level ?? 1;
            if (!isset($tree[$level])) {
                $tree[$level] = [];
            }
            $tree[$level][] = $category;
        }
        ksort($tree);
        return $tree;
    }

    /**
     * Find existing category in Magento 2 by name and parent
     */
    protected function findExistingCategoryInM2($categoryName, $parentId)
    {
        if (!$categoryName) {
            return null;
        }

        try {
            // Get name attribute ID for M2
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return null;
            }

            $nameAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');

            if (!$nameAttributeId) {
                return null;
            }

            // Find categories with the same name and parent (checking default store view)
            $existingCategories = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity', 'e')
                ->join($this->magento2Prefix . 'catalog_category_entity_varchar as v', function($join) use ($nameAttributeId) {
                    $join->on('e.entity_id', '=', 'v.entity_id')
                         ->where('v.attribute_id', '=', $nameAttributeId)
                         ->where('v.store_id', '=', 0);
                })
                ->where('v.value', '=', $categoryName)
                ->where('e.parent_id', '=', $parentId)
                ->select('e.entity_id')
                ->first();

            return $existingCategories ? $existingCategories->entity_id : null;

        } catch (Exception $e) {
            Log::error("Error finding existing category in M2: " . $e->getMessage());
            return null;
        }
    }

    /**
     * Migrate a single category
     */
    protected function migrateCategory($m1Category, $parentId = null)
    {
        try {
            // Check if category already exists in mapping (already processed in this migration)
            if (isset($this->categoryMapping[$m1Category->entity_id])) {
                return $this->categoryMapping[$m1Category->entity_id];
            }

            // Determine parent ID
            if ($m1Category->parent_id == 1 || $m1Category->parent_id == 0) {
                $m2ParentId = $parentId ?? $this->getMagento2RootCategoryId();
            } else {
                $m2ParentId = $this->categoryMapping[$m1Category->parent_id] ?? $parentId;
            }

            // Check if category already exists in M2 database
            $existingM2CategoryId = null;
            if ($m1Category->name) {
                $existingM2CategoryId = $this->findExistingCategoryInM2($m1Category->name, $m2ParentId);
            }

            if ($existingM2CategoryId) {
                // Category already exists in M2, use existing ID
                $m2EntityId = $existingM2CategoryId;
                $this->existingCount++;
                $this->migrationLog[] = "Found existing category: ID {$m1Category->entity_id} -> {$m2EntityId} ({$m1Category->name})";
            } else {
                // Category doesn't exist, create new one
                $m2EntityId = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity')
                    ->insertGetId([
                        'attribute_set_id' => 3, // Default category attribute set
                        'parent_id' => $m2ParentId,
                        'created_at' => now(),
                        'updated_at' => now(),
                        'path' => '',
                        'position' => $m1Category->position ?? 0,
                        'level' => $m1Category->level ?? 1,
                        'children_count' => 0,
                    ]);

                // Update path
                $path = $this->buildCategoryPath($m2EntityId, $m2ParentId);
                DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity')
                    ->where('entity_id', $m2EntityId)
                    ->update(['path' => $path]);

                $this->addedCount++;
                $this->migrationLog[] = "Added new category: ID {$m1Category->entity_id} -> {$m2EntityId} ({$m1Category->name})";
            }

            // Store mapping
            $this->categoryMapping[$m1Category->entity_id] = $m2EntityId;

            return $m2EntityId;

        } catch (Exception $e) {
            Log::error("Error migrating category {$m1Category->entity_id}: " . $e->getMessage());
            $this->migrationLog[] = "ERROR: Failed to migrate category ID {$m1Category->entity_id}: " . $e->getMessage();
            throw $e;
        }
    }

    /**
     * Update children_count for all parent categories
     */
    protected function updateChildrenCounts()
    {
        try {
            // Get all unique parent IDs from migrated categories
            $parentIds = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity')
                ->whereIn('entity_id', array_values($this->categoryMapping))
                ->distinct()
                ->pluck('parent_id')
                ->toArray();

            // Update children_count for each parent
            foreach ($parentIds as $parentId) {
                if ($parentId > 0) {
                    $childrenCount = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_category_entity')
                        ->where('parent_id', $parentId)
                        ->count();

                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_category_entity')
                        ->where('entity_id', $parentId)
                        ->update(['children_count' => $childrenCount]);
                }
            }
        } catch (Exception $e) {
            Log::error("Error updating children counts: " . $e->getMessage());
            // Don't throw, just log the error
        }
    }

    /**
     * Build category path
     */
    protected function buildCategoryPath($entityId, $parentId)
    {
        if ($parentId == $this->getMagento2RootCategoryId()) {
            return "1/{$parentId}/{$entityId}";
        }

        $parent = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'catalog_category_entity')
            ->where('entity_id', $parentId)
            ->first();

        if ($parent && $parent->path) {
            return $parent->path . '/' . $entityId;
        }

        return "1/{$parentId}/{$entityId}";
    }

    /**
     * Migrate category attributes for a specific store
     */
    protected function migrateCategoryAttributes($m1StoreId, $m2StoreId)
    {
        try {
            // Get attribute IDs for Magento 2
            $attributeIds = $this->getMagento2AttributeIds();

            // Get categories with their attributes from Magento 1
            $m1Categories = $this->getMagento1Categories($m1StoreId);

            foreach ($m1Categories as $m1Category) {
                if (!isset($this->categoryMapping[$m1Category->entity_id])) {
                    continue;
                }

                $m2EntityId = $this->categoryMapping[$m1Category->entity_id];

                // Migrate name
                if ($m1Category->name) {
                    $this->insertCategoryAttribute(
                        $m2EntityId,
                        $attributeIds['name'],
                        $m2StoreId,
                        $m1Category->name
                    );
                }

                // Migrate is_active
                if ($m1Category->is_active !== null) {
                    $this->insertCategoryAttribute(
                        $m2EntityId,
                        $attributeIds['is_active'],
                        $m2StoreId,
                        $m1Category->is_active
                    );
                }

                // Migrate url_key
                if ($m1Category->url_key) {
                    $this->insertCategoryAttribute(
                        $m2EntityId,
                        $attributeIds['url_key'],
                        $m2StoreId,
                        $m1Category->url_key
                    );
                }
            }

            $this->migrationLog[] = "Migrated attributes for store mapping: M1 Store {$m1StoreId} -> M2 Store {$m2StoreId}";

        } catch (Exception $e) {
            Log::error("Error migrating category attributes: " . $e->getMessage());
            $this->migrationLog[] = "ERROR: Failed to migrate attributes for store {$m1StoreId}: " . $e->getMessage();
            throw $e;
        }
    }

    /**
     * Insert category attribute value
     */
    protected function insertCategoryAttribute($entityId, $attributeId, $storeId, $value)
    {
        // Determine which table to use based on attribute type
        $attribute = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'eav_attribute')
            ->where('attribute_id', $attributeId)
            ->first();

        if (!$attribute) {
            return;
        }

        $table = $this->magento2Prefix . 'catalog_category_entity_' . $attribute->backend_type;

        // Check if value already exists
        $exists = DB::connection($this->magento2Connection)
            ->table($table)
            ->where('entity_id', $entityId)
            ->where('attribute_id', $attributeId)
            ->where('store_id', $storeId)
            ->exists();

        if ($exists) {
            DB::connection($this->magento2Connection)
                ->table($table)
                ->where('entity_id', $entityId)
                ->where('attribute_id', $attributeId)
                ->where('store_id', $storeId)
                ->update(['value' => $value]);
        } else {
            DB::connection($this->magento2Connection)
                ->table($table)
                ->insert([
                    'attribute_id' => $attributeId,
                    'store_id' => $storeId,
                    'entity_id' => $entityId,
                    'value' => $value,
                ]);
        }
    }

    /**
     * Get Magento 2 attribute IDs
     */
    protected function getMagento2AttributeIds()
    {
        $entityTypeId = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'eav_entity_type')
            ->where('entity_type_code', 'catalog_category')
            ->value('entity_type_id');

        $attributes = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'eav_attribute')
            ->where('entity_type_id', $entityTypeId)
            ->whereIn('attribute_code', ['name', 'is_active', 'url_key'])
            ->pluck('attribute_id', 'attribute_code')
            ->toArray();

        return $attributes;
    }

    /**
     * Migrate a single category from Magento 1 to Magento 2
     */
    public function migrateSingleCategory($m1CategoryId, $storeId = 0)
    {
        try {
            DB::connection($this->magento2Connection)->beginTransaction();

            // Get the M1 category
            $m1Categories = $this->getMagento1Categories($storeId);
            $m1Category = $m1Categories->firstWhere('entity_id', $m1CategoryId);

            if (!$m1Category) {
                return [
                    'success' => false,
                    'message' => 'Category not found in Magento 1',
                ];
            }

            // Determine parent ID in M2
            $m2ParentId = $this->getMagento2RootCategoryId();
            
            // If category has a parent in M1, try to find it in M2
            if ($m1Category->parent_id && $m1Category->parent_id != 0 && $m1Category->parent_id != 1) {
                // Check if parent was already migrated (check by name)
                $m1ParentCategories = $this->getMagento1Categories($storeId);
                $m1Parent = $m1ParentCategories->firstWhere('entity_id', $m1Category->parent_id);
                
                if ($m1Parent && $m1Parent->name) {
                    $m2ParentId = $this->findExistingCategoryInM2($m1Parent->name, $this->getMagento2RootCategoryId());
                    if (!$m2ParentId) {
                        // Parent not found, use root
                        $m2ParentId = $this->getMagento2RootCategoryId();
                    }
                }
            }

            // Check if category already exists in M2
            $existingM2CategoryId = null;
            if ($m1Category->name) {
                $existingM2CategoryId = $this->findExistingCategoryInM2($m1Category->name, $m2ParentId);
            }

            if ($existingM2CategoryId) {
                DB::connection($this->magento2Connection)->rollBack();
                return [
                    'success' => false,
                    'message' => 'Category already exists in Magento 2 (ID: ' . $existingM2CategoryId . ')',
                    'm2_category_id' => $existingM2CategoryId,
                ];
            }

            // Create new category entity
            $m2EntityId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity')
                ->insertGetId([
                    'attribute_set_id' => 3, // Default category attribute set
                    'parent_id' => $m2ParentId,
                    'created_at' => now(),
                    'updated_at' => now(),
                    'path' => '',
                    'position' => $m1Category->position ?? 0,
                    'level' => $m1Category->level ?? 1,
                    'children_count' => 0,
                ]);

            // Update path
            $path = $this->buildCategoryPath($m2EntityId, $m2ParentId);
            DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity')
                ->where('entity_id', $m2EntityId)
                ->update(['path' => $path]);

            // Migrate attributes for default store (0)
            $attributeIds = $this->getMagento2AttributeIds();

            // Migrate name
            if ($m1Category->name) {
                $this->insertCategoryAttribute(
                    $m2EntityId,
                    $attributeIds['name'],
                    $storeId,
                    $m1Category->name
                );
            }

            // Migrate is_active
            if ($m1Category->is_active !== null) {
                $this->insertCategoryAttribute(
                    $m2EntityId,
                    $attributeIds['is_active'],
                    $storeId,
                    $m1Category->is_active
                );
            }

            // Migrate url_key
            if ($m1Category->url_key) {
                $this->insertCategoryAttribute(
                    $m2EntityId,
                    $attributeIds['url_key'],
                    $storeId,
                    $m1Category->url_key
                );
            }

            // Update children_count for parent
            if ($m2ParentId > 0) {
                $childrenCount = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity')
                    ->where('parent_id', $m2ParentId)
                    ->count();

                DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_entity')
                    ->where('entity_id', $m2ParentId)
                    ->update(['children_count' => $childrenCount]);
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => 'Category migrated successfully',
                'm1_category_id' => $m1CategoryId,
                'm2_category_id' => $m2EntityId,
                'category_name' => $m1Category->name ?? 'Unnamed Category',
            ];

        } catch (Exception $e) {
            DB::connection($this->magento2Connection)->rollBack();
            Log::error("Error migrating single category {$m1CategoryId}: " . $e->getMessage());
            
            return [
                'success' => false,
                'message' => 'Migration failed: ' . $e->getMessage(),
            ];
        }
    }

    /**
     * Rename a Magento 2 category
     */
    public function renameCategory($categoryId, $newName, $storeId = 0)
    {
        try {
            // Validate category exists
            $category = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity')
                ->where('entity_id', $categoryId)
                ->first();

            if (!$category) {
                return [
                    'success' => false,
                    'message' => 'Category not found',
                ];
            }

            // Prevent renaming system root
            if ($categoryId == 0 || $categoryId == 1) {
                return [
                    'success' => false,
                    'message' => 'Cannot rename system root category',
                ];
            }

            // Validate name
            $newName = trim($newName);
            if (empty($newName)) {
                return [
                    'success' => false,
                    'message' => 'Category name cannot be empty',
                ];
            }

            // Get name attribute ID
            $attributeIds = $this->getMagento2AttributeIds();
            if (!isset($attributeIds['name'])) {
                return [
                    'success' => false,
                    'message' => 'Name attribute not found',
                ];
            }

            DB::connection($this->magento2Connection)->beginTransaction();

            // Update name attribute for the specified store (default store = 0)
            $this->insertCategoryAttribute(
                $categoryId,
                $attributeIds['name'],
                $storeId,
                $newName
            );

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => 'Category renamed successfully',
                'new_name' => $newName,
            ];

        } catch (Exception $e) {
            if (isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error("Error renaming category {$categoryId}: " . $e->getMessage());
            
            return [
                'success' => false,
                'message' => 'Failed to rename category: ' . $e->getMessage(),
            ];
        }
    }

    /**
     * Get Magento 2 root category ID
     */
    protected function getMagento2RootCategoryId()
    {
        // Root category is usually ID 2 in Magento 2
        $rootId = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'catalog_category_entity')
            ->where('level', 0)
            ->where('parent_id', 0)
            ->value('entity_id');

        return $rootId ?: 2;
    }

    /**
     * Delete a category and all its children recursively
     */
    public function deleteCategory($categoryId, $source = 'm2')
    {
        try {
            $connection = $source === 'm1' ? $this->magento1Connection : $this->magento2Connection;
            $prefix = $source === 'm1' ? $this->magento1Prefix : $this->magento2Prefix;

            // Get category information
            $category = DB::connection($connection)
                ->table($prefix . 'catalog_category_entity')
                ->where('entity_id', $categoryId)
                ->first();

            if (!$category) {
                return [
                    'success' => false,
                    'message' => 'Category not found',
                ];
            }

            // Prevent deletion of system root (ID 0 or 1)
            if ($categoryId == 0 || $categoryId == 1) {
                return [
                    'success' => false,
                    'message' => 'Cannot delete system root category',
                ];
            }

            DB::connection($connection)->beginTransaction();

            // Recursively delete all children first
            $this->deleteCategoryChildren($categoryId, $connection, $prefix);

            // Now delete the category itself
            $this->deleteCategoryData($categoryId, $connection, $prefix);

            // Update parent's children_count if parent exists
            if ($category->parent_id > 0 && $category->parent_id != 1) {
                $parentChildrenCount = DB::connection($connection)
                    ->table($prefix . 'catalog_category_entity')
                    ->where('parent_id', $category->parent_id)
                    ->count();

                DB::connection($connection)
                    ->table($prefix . 'catalog_category_entity')
                    ->where('entity_id', $category->parent_id)
                    ->update(['children_count' => $parentChildrenCount]);
            }

            DB::connection($connection)->commit();

            return [
                'success' => true,
                'message' => 'Category and all subcategories deleted successfully',
            ];

        } catch (Exception $e) {
            if (isset($connection)) {
                DB::connection($connection)->rollBack();
            }
            Log::error("Error deleting category {$categoryId}: " . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Failed to delete category: ' . $e->getMessage(),
            ];
        }
    }

    /**
     * Test database connections
     */
    public function testConnections()
    {
        $results = [
            'magento1' => false,
            'magento2' => false,
        ];

        try {
            DB::connection($this->magento1Connection)->select('SELECT 1');
            $results['magento1'] = true;
        } catch (Exception $e) {
            $results['magento1_error'] = $e->getMessage();
        }

        try {
            DB::connection($this->magento2Connection)->select('SELECT 1');
            $results['magento2'] = true;
        } catch (Exception $e) {
            $results['magento2_error'] = $e->getMessage();
        }

        return $results;
    }

    /**
     * Get all category attributes from Magento 1
     */
    public function getMagento1Attributes()
    {
        try {
            // Get entity type ID for catalog_category
            $entityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get all attributes for catalog_category
            $attributes = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->select('attribute_id', 'attribute_code', 'backend_type', 'frontend_input', 'frontend_label', 'is_required', 'is_user_defined', 'default_value')
                ->orderBy('attribute_code')
                ->get();

            return $attributes;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 1 attributes: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get all category attributes from Magento 2
     */
    public function getMagento2Attributes()
    {
        try {
            // Get entity type ID for catalog_category
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get all attributes for catalog_category
            $attributes = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->select('attribute_id', 'attribute_code', 'backend_type', 'frontend_input', 'frontend_label', 'is_required', 'is_user_defined', 'default_value')
                ->orderBy('attribute_code')
                ->get();

            return $attributes;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 2 attributes: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get attributes that exist in Magento 1 but are missing in Magento 2
     */
    public function getM1AttributesMissingInM2()
    {
        try {
            $m1Attributes = $this->getMagento1Attributes();
            $m2Attributes = $this->getMagento2Attributes();

            // Get all M2 attribute codes
            $m2AttributeCodes = $m2Attributes->pluck('attribute_code')->toArray();

            // Filter M1 attributes that don't exist in M2
            $missingAttributes = $m1Attributes->filter(function ($attr) use ($m2AttributeCodes) {
                return !in_array($attr->attribute_code, $m2AttributeCodes);
            });

            return $missingAttributes->values();
        } catch (Exception $e) {
            Log::error('Error fetching missing attributes: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Migrate an attribute from Magento 1 to Magento 2
     */
    public function migrateAttribute($m1AttributeId)
    {
        try {
            // Get M1 entity type ID
            $m1EntityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$m1EntityTypeId) {
                return ['success' => false, 'message' => 'Magento 1 entity type not found'];
            }

            // Get full attribute data from M1
            $m1Attribute = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('attribute_id', $m1AttributeId)
                ->where('entity_type_id', $m1EntityTypeId)
                ->first();

            if (!$m1Attribute) {
                return ['success' => false, 'message' => 'Attribute not found in Magento 1'];
            }

            // Check if attribute already exists in M2
            $m2EntityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$m2EntityTypeId) {
                return ['success' => false, 'message' => 'Magento 2 entity type not found'];
            }

            $existingAttribute = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $m2EntityTypeId)
                ->where('attribute_code', $m1Attribute->attribute_code)
                ->first();

            if ($existingAttribute) {
                return ['success' => false, 'message' => 'Attribute already exists in Magento 2'];
            }

            DB::connection($this->magento2Connection)->beginTransaction();

            // Insert attribute into M2
            $m2AttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->insertGetId([
                    'entity_type_id' => $m2EntityTypeId,
                    'attribute_code' => $m1Attribute->attribute_code,
                    'attribute_model' => $m1Attribute->attribute_model ?? null,
                    'backend_model' => $m1Attribute->backend_model ?? null,
                    'backend_type' => $m1Attribute->backend_type,
                    'backend_table' => $m1Attribute->backend_table ?? null,
                    'frontend_model' => $m1Attribute->frontend_model ?? null,
                    'frontend_input' => $m1Attribute->frontend_input ?? null,
                    'frontend_label' => $m1Attribute->frontend_label ?? null,
                    'frontend_class' => $m1Attribute->frontend_class ?? null,
                    'source_model' => $m1Attribute->source_model ?? null,
                    'is_required' => $m1Attribute->is_required ?? 0,
                    'is_user_defined' => $m1Attribute->is_user_defined ?? 1,
                    'default_value' => $m1Attribute->default_value ?? null,
                    'is_unique' => $m1Attribute->is_unique ?? 0,
                    'note' => $m1Attribute->note ?? null,
                ]);

            // Add attribute to default attribute set if it exists
            $defaultAttributeSet = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute_set')
                ->where('entity_type_id', $m2EntityTypeId)
                ->where('attribute_set_name', 'Default')
                ->first();

            if ($defaultAttributeSet) {
                $defaultGroup = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'eav_attribute_group')
                    ->where('attribute_set_id', $defaultAttributeSet->attribute_set_id)
                    ->orderBy('sort_order')
                    ->first();

                if ($defaultGroup) {
                    // Get max sort order for this group
                    $maxSortOrder = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'eav_entity_attribute')
                        ->where('attribute_set_id', $defaultAttributeSet->attribute_set_id)
                        ->where('attribute_group_id', $defaultGroup->attribute_group_id)
                        ->max('sort_order') ?? 0;

                    // Add attribute to entity_attribute table
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'eav_entity_attribute')
                        ->insert([
                            'entity_type_id' => $m2EntityTypeId,
                            'attribute_set_id' => $defaultAttributeSet->attribute_set_id,
                            'attribute_group_id' => $defaultGroup->attribute_group_id,
                            'attribute_id' => $m2AttributeId,
                            'sort_order' => $maxSortOrder + 10,
                        ]);
                }
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => 'Attribute migrated successfully',
                'attribute_code' => $m1Attribute->attribute_code,
                'm2_attribute_id' => $m2AttributeId,
            ];

        } catch (Exception $e) {
            if (isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error("Error migrating attribute {$m1AttributeId}: " . $e->getMessage());
            return ['success' => false, 'message' => 'Failed to migrate attribute: ' . $e->getMessage()];
        }
    }

    /**
     * Get attribute groups from Magento 1
     */
    public function getMagento1AttributeGroups()
    {
        try {
            // Get entity type ID for catalog_category
            $entityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get attribute sets for catalog_category
            $attributeSets = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute_set')
                ->where('entity_type_id', $entityTypeId)
                ->get();

            $groups = collect([]);

            foreach ($attributeSets as $set) {
                // Get attribute groups for this set
                $setGroups = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'eav_attribute_group')
                    ->where('attribute_set_id', $set->attribute_set_id)
                    ->select('attribute_group_id', 'attribute_set_id', 'attribute_group_name', 'sort_order')
                    ->orderBy('sort_order')
                    ->get();

                foreach ($setGroups as $group) {
                    // Get attributes in this group
                    $attributeIds = DB::connection($this->magento1Connection)
                        ->table($this->magento1Prefix . 'eav_entity_attribute')
                        ->where('attribute_set_id', $set->attribute_set_id)
                        ->where('attribute_group_id', $group->attribute_group_id)
                        ->pluck('attribute_id')
                        ->toArray();

                    $group->attribute_set_name = $set->attribute_set_name ?? 'Default';
                    $group->attribute_count = count($attributeIds);
                    $group->attribute_ids = $attributeIds;
                    $groups->push($group);
                }
            }

            return $groups;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 1 attribute groups: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get attribute groups from Magento 2
     */
    public function getMagento2AttributeGroups()
    {
        try {
            // Get entity type ID for catalog_category
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get attribute sets for catalog_category
            $attributeSets = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute_set')
                ->where('entity_type_id', $entityTypeId)
                ->get();

            $groups = collect([]);

            foreach ($attributeSets as $set) {
                // Get attribute groups for this set
                $setGroups = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'eav_attribute_group')
                    ->where('attribute_set_id', $set->attribute_set_id)
                    ->select('attribute_group_id', 'attribute_set_id', 'attribute_group_name', 'sort_order')
                    ->orderBy('sort_order')
                    ->get();

                foreach ($setGroups as $group) {
                    // Get attributes in this group
                    $attributeIds = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'eav_entity_attribute')
                        ->where('attribute_set_id', $set->attribute_set_id)
                        ->where('attribute_group_id', $group->attribute_group_id)
                        ->pluck('attribute_id')
                        ->toArray();

                    $group->attribute_set_name = $set->attribute_set_name ?? 'Default';
                    $group->attribute_count = count($attributeIds);
                    $group->attribute_ids = $attributeIds;
                    $groups->push($group);
                }
            }

            return $groups;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 2 attribute groups: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get attribute groups that exist in Magento 1 but are missing in Magento 2
     */
    public function getM1AttributeGroupsMissingInM2()
    {
        try {
            $m1Groups = $this->getMagento1AttributeGroups();
            $m2Groups = $this->getMagento2AttributeGroups();

            // Create a map of M2 groups by set name and group name
            $m2GroupMap = [];
            foreach ($m2Groups as $m2Group) {
                $key = ($m2Group->attribute_set_name ?? 'Default') . '|' . ($m2Group->attribute_group_name ?? '');
                $m2GroupMap[$key] = true;
            }

            // Filter M1 groups that don't exist in M2
            $missingGroups = $m1Groups->filter(function ($group) use ($m2GroupMap) {
                $key = ($group->attribute_set_name ?? 'Default') . '|' . ($group->attribute_group_name ?? '');
                return !isset($m2GroupMap[$key]);
            });

            return $missingGroups->values();
        } catch (Exception $e) {
            Log::error('Error fetching missing attribute groups: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Migrate an attribute group from Magento 1 to Magento 2
     */
    public function migrateAttributeGroup($m1GroupId, $m1SetId)
    {
        try {
            // Get M1 entity type ID
            $m1EntityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$m1EntityTypeId) {
                return ['success' => false, 'message' => 'Magento 1 entity type not found'];
            }

            // Get M1 attribute group
            $m1Group = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute_group')
                ->where('attribute_group_id', $m1GroupId)
                ->where('attribute_set_id', $m1SetId)
                ->first();

            if (!$m1Group) {
                return ['success' => false, 'message' => 'Attribute group not found in Magento 1'];
            }

            // Get M1 attribute set
            $m1Set = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute_set')
                ->where('attribute_set_id', $m1SetId)
                ->where('entity_type_id', $m1EntityTypeId)
                ->first();

            if (!$m1Set) {
                return ['success' => false, 'message' => 'Attribute set not found in Magento 1'];
            }

            // Get M2 entity type ID
            $m2EntityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');

            if (!$m2EntityTypeId) {
                return ['success' => false, 'message' => 'Magento 2 entity type not found'];
            }

            // Find or create the corresponding attribute set in M2
            $m2Set = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute_set')
                ->where('entity_type_id', $m2EntityTypeId)
                ->where('attribute_set_name', $m1Set->attribute_set_name)
                ->first();

            if (!$m2Set) {
                // Create the attribute set in M2
                $m2SetId = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'eav_attribute_set')
                    ->insertGetId([
                        'entity_type_id' => $m2EntityTypeId,
                        'attribute_set_name' => $m1Set->attribute_set_name,
                        'sort_order' => $m1Set->sort_order ?? 0,
                    ]);
                $m2Set = (object)['attribute_set_id' => $m2SetId];
            } else {
                $m2SetId = $m2Set->attribute_set_id;
            }

            // Check if group already exists in M2
            $existingGroup = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute_group')
                ->where('attribute_set_id', $m2SetId)
                ->where('attribute_group_name', $m1Group->attribute_group_name)
                ->first();

            if ($existingGroup) {
                return ['success' => false, 'message' => 'Attribute group already exists in Magento 2'];
            }

            DB::connection($this->magento2Connection)->beginTransaction();

            // Create the attribute group in M2
            $m2GroupId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute_group')
                ->insertGetId([
                    'attribute_set_id' => $m2SetId,
                    'attribute_group_name' => $m1Group->attribute_group_name,
                    'sort_order' => $m1Group->sort_order ?? 0,
                ]);

            // Get attributes from M1 group
            $m1Attributes = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_attribute')
                ->where('attribute_set_id', $m1SetId)
                ->where('attribute_group_id', $m1GroupId)
                ->orderBy('sort_order')
                ->get();

            // Migrate attributes to M2 group (if they exist in M2)
            $migratedCount = 0;
            foreach ($m1Attributes as $m1EntityAttr) {
                // Get M1 attribute code
                $m1Attribute = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'eav_attribute')
                    ->where('attribute_id', $m1EntityAttr->attribute_id)
                    ->first();

                if ($m1Attribute) {
                    // Find corresponding M2 attribute by code
                    $m2Attribute = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'eav_attribute')
                        ->where('entity_type_id', $m2EntityTypeId)
                        ->where('attribute_code', $m1Attribute->attribute_code)
                        ->first();

                    if ($m2Attribute) {
                        // Check if already in entity_attribute
                        $exists = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'eav_entity_attribute')
                            ->where('attribute_set_id', $m2SetId)
                            ->where('attribute_group_id', $m2GroupId)
                            ->where('attribute_id', $m2Attribute->attribute_id)
                            ->exists();

                        if (!$exists) {
                            DB::connection($this->magento2Connection)
                                ->table($this->magento2Prefix . 'eav_entity_attribute')
                                ->insert([
                                    'entity_type_id' => $m2EntityTypeId,
                                    'attribute_set_id' => $m2SetId,
                                    'attribute_group_id' => $m2GroupId,
                                    'attribute_id' => $m2Attribute->attribute_id,
                                    'sort_order' => $m1EntityAttr->sort_order ?? 0,
                                ]);
                            $migratedCount++;
                        }
                    }
                }
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => 'Attribute group migrated successfully',
                'group_name' => $m1Group->attribute_group_name,
                'm2_group_id' => $m2GroupId,
                'attributes_migrated' => $migratedCount,
            ];

        } catch (Exception $e) {
            if (isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error("Error migrating attribute group {$m1GroupId}: " . $e->getMessage());
            return ['success' => false, 'message' => 'Failed to migrate attribute group: ' . $e->getMessage()];
        }
    }

    /**
     * Get all products from Magento 1
     */
    public function getMagento1Products()
    {
        try {
            // Get entity type ID for catalog_product
            $entityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get base product data - check if SKU column exists in entity table
            $hasSkuColumn = false;
            try {
                $testQuery = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_product_entity')
                    ->select('sku')
                    ->limit(1)
                    ->first();
                $hasSkuColumn = true;
            } catch (Exception $e) {
                // SKU column doesn't exist, will use EAV
                $hasSkuColumn = false;
            }

            if ($hasSkuColumn) {
                // SKU is stored directly in entity table
                $products = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_product_entity')
                    ->select('entity_id', 'sku', 'type_id', 'attribute_set_id', 'created_at', 'updated_at')
                    ->orderBy('entity_id')
                    ->get();
            } else {
                // SKU is stored as EAV attribute
                $products = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_product_entity')
                    ->select('entity_id', 'type_id', 'attribute_set_id', 'created_at', 'updated_at')
                    ->orderBy('entity_id')
                    ->get();
            }

            // Get SKU attribute ID (for EAV storage)
            $skuAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'sku')
                ->value('attribute_id');

            // Get name attribute ID
            $nameAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');

            // Get SKU and name values from EAV if needed
            $skus = [];
            $names = [];

            if (!$hasSkuColumn && $skuAttributeId) {
                $skuValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_product_entity_varchar')
                    ->where('attribute_id', $skuAttributeId)
                    ->where('store_id', 0)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $skus = $skuValues;
            }

            if ($nameAttributeId) {
                $nameValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_product_entity_varchar')
                    ->where('attribute_id', $nameAttributeId)
                    ->where('store_id', 0)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $names = $nameValues;
            }

            // Combine data
            foreach ($products as $product) {
                if ($hasSkuColumn) {
                    // SKU from entity table
                    $product->sku = !empty($product->sku) ? $product->sku : 'N/A';
                } else {
                    // SKU from EAV
                    $product->sku = $skus[$product->entity_id] ?? 'N/A';
                }
                $product->name = $names[$product->entity_id] ?? 'Unnamed Product';
            }

            return $products;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 1 products: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get all products from Magento 2
     */
    public function getMagento2Products()
    {
        try {
            // Get entity type ID for catalog_product
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return collect([]);
            }

            // Get base product data - check if SKU column exists in entity table
            $hasSkuColumn = false;
            try {
                $testQuery = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity')
                    ->select('sku')
                    ->limit(1)
                    ->first();
                $hasSkuColumn = true;
            } catch (Exception $e) {
                // SKU column doesn't exist, will use EAV
                $hasSkuColumn = false;
            }

            if ($hasSkuColumn) {
                // SKU is stored directly in entity table
                $products = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity')
                    ->select('entity_id', 'sku', 'type_id', 'attribute_set_id', 'created_at', 'updated_at')
                    ->orderBy('entity_id')
                    ->get();
            } else {
                // SKU is stored as EAV attribute
                $products = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity')
                    ->select('entity_id', 'type_id', 'attribute_set_id', 'created_at', 'updated_at')
                    ->orderBy('entity_id')
                    ->get();
            }

            // Get SKU attribute ID (for EAV storage)
            $skuAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'sku')
                ->value('attribute_id');

            // Get name attribute ID
            $nameAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');

            // Get SKU and name values from EAV if needed
            $skus = [];
            $names = [];

            if (!$hasSkuColumn && $skuAttributeId) {
                $skuValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                    ->where('attribute_id', $skuAttributeId)
                    ->where('store_id', 0)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $skus = $skuValues;
            }

            if ($nameAttributeId) {
                $nameValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                    ->where('attribute_id', $nameAttributeId)
                    ->where('store_id', 0)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $names = $nameValues;
            }

            // Combine data
            foreach ($products as $product) {
                if ($hasSkuColumn) {
                    // SKU from entity table
                    $product->sku = !empty($product->sku) ? $product->sku : 'N/A';
                } else {
                    // SKU from EAV
                    $product->sku = $skus[$product->entity_id] ?? 'N/A';
                }
                $product->name = $names[$product->entity_id] ?? 'Unnamed Product';
            }

            return $products;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 2 products: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get Magento 1 products that don't exist in Magento 2
     */
    public function getM1ProductsNotInM2()
    {
        try {
            $m1Products = $this->getMagento1Products();
            $m2Products = $this->getMagento2Products();

            // Get all M2 SKUs
            $m2Skus = $m2Products->pluck('sku')->filter(function($sku) {
                return $sku !== 'N/A' && !empty($sku);
            })->toArray();

            // Get M2 product IDs (for products without SKU)
            $m2ProductIds = $m2Products->pluck('entity_id')->toArray();

            // Filter M1 products that don't exist in M2
            $missingProducts = $m1Products->filter(function ($m1Product) use ($m2Skus, $m2ProductIds) {
                $m1Sku = $m1Product->sku ?? 'N/A';
                $hasSku = ($m1Sku !== 'N/A' && !empty($m1Sku));
                
                if ($hasSku) {
                    // Check by SKU
                    return !in_array($m1Sku, $m2Skus);
                } else {
                    // Check by product ID
                    return !in_array($m1Product->entity_id, $m2ProductIds);
                }
            });

            return $missingProducts->values();
        } catch (Exception $e) {
            Log::error('Error fetching missing products: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Get Magento 2 products that don't exist in Magento 1
     */
    public function getM2ProductsNotInM1()
    {
        try {
            $m1Products = $this->getMagento1Products();
            $m2Products = $this->getMagento2Products();

            // Get all M1 SKUs
            $m1Skus = $m1Products->pluck('sku')->filter(function($sku) {
                return $sku !== 'N/A' && !empty($sku);
            })->toArray();

            // Get M1 product IDs (for products without SKU)
            $m1ProductIds = $m1Products->pluck('entity_id')->toArray();

            // Filter M2 products that don't exist in M1
            $missingProducts = $m2Products->filter(function ($m2Product) use ($m1Skus, $m1ProductIds) {
                $m2Sku = $m2Product->sku ?? 'N/A';
                $hasSku = ($m2Sku !== 'N/A' && !empty($m2Sku));
                
                if ($hasSku) {
                    // Check by SKU
                    return !in_array($m2Sku, $m1Skus);
                } else {
                    // Check by product ID
                    return !in_array($m2Product->entity_id, $m1ProductIds);
                }
            });

            return $missingProducts->values();
        } catch (Exception $e) {
            Log::error('Error fetching M2 products not in M1: ' . $e->getMessage());
            return collect([]);
        }
    }

    /**
     * Migrate all products from Magento 1 to Magento 2
     */
    public function migrateProducts($dryRun = false)
    {
        try {
            $this->migrationLog = [];
            $addedCount = 0;
            $updatedCount = 0;
            $errorCount = 0;
            $missingAttributes = [];

            // Get M1 and M2 entity type IDs
            $m1EntityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            $m2EntityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            if (!$m1EntityTypeId || !$m2EntityTypeId) {
                return [
                    'success' => false,
                    'message' => 'Entity type not found',
                    'added' => 0,
                    'updated' => 0,
                    'errors' => 0,
                    'log' => [],
                    'missing_attributes' => []
                ];
            }

            // Get all M1 products
            $m1Products = $this->getMagento1Products();

            // Get M2 attribute IDs (common ones)
            $m2AttributeIds = $this->getMagento2ProductAttributeIds();

            // Get M1 attribute IDs for common attributes
            $m1AttributeIds = $this->getMagento1ProductAttributeIds();

            // Get all M1 attributes to check for missing ones
            $allM1Attributes = $this->getAllMagento1ProductAttributes();
            
            // Also get all M1 attribute IDs (not just common ones) for comprehensive checking
            $allM1AttributeIds = [];
            if ($allM1Attributes) {
                foreach ($allM1Attributes as $attr) {
                    $allM1AttributeIds[$attr->attribute_code] = $attr->attribute_id;
                }
            }
            
            // Get all M2 attribute IDs for comparison
            $allM2AttributeIds = $this->getAllMagento2ProductAttributeIds();

            // Get category mapping (from previous category migrations)
            $categoryMapping = $this->getCategoryMapping();

            if (!$dryRun) {
                DB::connection($this->magento2Connection)->beginTransaction();
            }

            // Check if M2 has SKU column in entity table
            $m2HasSkuColumn = false;
            try {
                $testQuery = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity')
                    ->select('sku')
                    ->limit(1)
                    ->first();
                $m2HasSkuColumn = true;
            } catch (Exception $e) {
                $m2HasSkuColumn = false;
            }

            foreach ($m1Products as $m1Product) {
                try {
                    $m1Sku = $m1Product->sku ?? 'N/A';
                    $hasSku = ($m1Sku !== 'N/A' && !empty($m1Sku));
                    
                    // Check if product exists in M2 by SKU (if SKU exists) or by ID (if no SKU)
                    $m2Product = null;
                    $m2ProductId = null;
                    $isNew = false;

                    if ($hasSku) {
                        // Check if SKU exists in M2 - try both entity table and EAV
                        if ($m2HasSkuColumn) {
                            // SKU is stored in entity table
                            $m2Product = DB::connection($this->magento2Connection)
                                ->table($this->magento2Prefix . 'catalog_product_entity')
                                ->where('sku', $m1Sku)
                                ->first();
                        } else {
                            // SKU is stored in EAV table
                            if (isset($m2AttributeIds['sku'])) {
                                $m2Product = DB::connection($this->magento2Connection)
                                    ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                                    ->where('attribute_id', $m2AttributeIds['sku'])
                                    ->where('value', $m1Sku)
                                    ->where('store_id', 0)
                                    ->first();
                            }
                        }
                    } else {
                        // Product has no SKU, check by entity_id
                        $m2Product = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_product_entity')
                            ->where('entity_id', $m1Product->entity_id)
                            ->first();
                    }

                    if ($m2Product) {
                        // Product exists, get its entity_id
                        $m2ProductId = $m2Product->entity_id;
                        if (!$dryRun) {
                            $this->migrationLog[] = "Updating existing product: " . ($hasSku ? "SKU {$m1Sku}" : "No SKU") . " (ID: {$m2ProductId})";
                        } else {
                            $this->migrationLog[] = "Would update existing product: " . ($hasSku ? "SKU {$m1Sku}" : "No SKU") . " (ID: {$m2ProductId})";
                        }
                        $updatedCount++;
                    } else {
                        // Product doesn't exist
                        if ($hasSku) {
                            // Product has SKU, will get new ID
                            if (!$dryRun) {
                                // Create new product - check if we need to set SKU in entity table or EAV
                                if ($m2HasSkuColumn) {
                                    // SKU goes in entity table
                                    $m2ProductId = DB::connection($this->magento2Connection)
                                        ->table($this->magento2Prefix . 'catalog_product_entity')
                                        ->insertGetId([
                                            'sku' => $m1Sku,
                                            'attribute_set_id' => $m1Product->attribute_set_id ?? 4,
                                            'type_id' => $m1Product->type_id ?? 'simple',
                                            'created_at' => $m1Product->created_at ?? now(),
                                            'updated_at' => now(),
                                        ]);
                                } else {
                                    // SKU goes in EAV table
                                    $m2ProductId = DB::connection($this->magento2Connection)
                                        ->table($this->magento2Prefix . 'catalog_product_entity')
                                        ->insertGetId([
                                            'attribute_set_id' => $m1Product->attribute_set_id ?? 4,
                                            'type_id' => $m1Product->type_id ?? 'simple',
                                            'created_at' => $m1Product->created_at ?? now(),
                                            'updated_at' => now(),
                                        ]);
                                    
                                    // Insert SKU in EAV table
                                    if (isset($m2AttributeIds['sku'])) {
                                        DB::connection($this->magento2Connection)
                                            ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                                            ->insert([
                                                'attribute_id' => $m2AttributeIds['sku'],
                                                'store_id' => 0,
                                                'entity_id' => $m2ProductId,
                                                'value' => $m1Sku,
                                            ]);
                                    }
                                }
                                $this->migrationLog[] = "Created new product: SKU {$m1Sku} (ID: {$m2ProductId})";
                            } else {
                                $m2ProductId = $m1Product->entity_id; // Use M1 ID for dry run simulation
                                $this->migrationLog[] = "Would create new product: SKU {$m1Sku} (ID: {$m2ProductId})";
                            }
                        } else {
                            // Product has no SKU, use M1 product ID
                            $m2ProductId = $m1Product->entity_id;
                            if (!$dryRun) {
                                // Check if this ID already exists in M2
                                $existing = DB::connection($this->magento2Connection)
                                    ->table($this->magento2Prefix . 'catalog_product_entity')
                                    ->where('entity_id', $m2ProductId)
                                    ->exists();
                                
                                if (!$existing) {
                                    $insertData = [
                                        'entity_id' => $m2ProductId,
                                        'attribute_set_id' => $m1Product->attribute_set_id ?? 4,
                                        'type_id' => $m1Product->type_id ?? 'simple',
                                        'created_at' => $m1Product->created_at ?? now(),
                                        'updated_at' => now(),
                                    ];
                                    
                                    // If SKU column exists, set it to NULL or empty
                                    if ($m2HasSkuColumn) {
                                        $insertData['sku'] = null;
                                    }
                                    
                                    DB::connection($this->magento2Connection)
                                        ->table($this->magento2Prefix . 'catalog_product_entity')
                                        ->insert($insertData);
                                    $this->migrationLog[] = "Created new product: No SKU (ID: {$m2ProductId}, using M1 ID)";
                                } else {
                                    $this->migrationLog[] = "Updating existing product: No SKU (ID: {$m2ProductId})";
                                    $updatedCount++;
                                    $addedCount--; // Adjust counts
                                    continue;
                                }
                            } else {
                                $this->migrationLog[] = "Would create new product: No SKU (ID: {$m2ProductId}, using M1 ID)";
                            }
                        }
                        $isNew = true;
                        $addedCount++;
                    }

                    // Migrate product attributes (with dry run support)
                    // Migrate ALL data from ALL catalog_product_entity_* tables
                    // This includes images, all store views, and all attributes
                    $missingAttrs = $this->migrateAllProductEntityData($m1Product->entity_id, $m2ProductId, $m1EntityTypeId, $m2EntityTypeId, $allM1AttributeIds, $allM2AttributeIds, $dryRun, $allM1Attributes);
                    if ($missingAttrs) {
                        foreach ($missingAttrs as $attr) {
                            // Check if this attribute is already in the list
                            $exists = false;
                            foreach ($missingAttributes as $existingAttr) {
                                if ($existingAttr['code'] === $attr['code']) {
                                    $exists = true;
                                    break;
                                }
                            }
                            if (!$exists) {
                                $missingAttributes[] = $attr;
                            }
                        }
                    }

                    // Migrate media gallery images (skip in dry run)
                    if (!$dryRun) {
                        $this->migrateProductMediaGallery($m1Product->entity_id, $m2ProductId, $m1EntityTypeId);
                    }

                    // Migrate category associations (skip in dry run)
                    if (!$dryRun) {
                        // Ensure product is enabled and visible (required for products to show in categories after reindex)
                        $this->ensureProductIsEnabledAndVisible($m2ProductId);
                        $this->migrateProductCategories($m1Product->entity_id, $m2ProductId, $categoryMapping);
                    }

                } catch (Exception $e) {
                    $errorCount++;
                    $errorMsg = $e->getMessage();
                    Log::error("Error migrating product {$m1Product->entity_id} (SKU: " . ($m1Product->sku ?? 'N/A') . "): " . $errorMsg);
                    $this->migrationLog[] = "ERROR: Failed to migrate product SKU " . ($m1Product->sku ?? 'N/A') . ": " . $errorMsg;
                    
                    // Try to extract missing attribute from error message
                    if (preg_match("/Table.*catalog_product_entity_(\w+).*doesn't exist/", $errorMsg, $matches)) {
                        $tableType = $matches[1] ?? null;
                        if ($tableType && $allM1Attributes) {
                            // Find attributes that use this backend type
                            foreach ($allM1Attributes as $attr) {
                                if ($attr->backend_type === $tableType) {
                                    $missingAttr = [
                                        'code' => $attr->attribute_code,
                                        'label' => $attr->frontend_label ?? $attr->attribute_code,
                                        'type' => $attr->backend_type
                                    ];
                                    // Check if already exists
                                    $exists = false;
                                    foreach ($missingAttributes as $existingAttr) {
                                        if ($existingAttr['code'] === $missingAttr['code']) {
                                            $exists = true;
                                            break;
                                        }
                                    }
                                    if (!$exists) {
                                        $missingAttributes[] = $missingAttr;
                                    }
                                }
                            }
                        }
                    }
                }
            }

            if (!$dryRun) {
                DB::connection($this->magento2Connection)->commit();
            }

            return [
                'success' => true,
                'message' => $dryRun ? 'Product migration dry run completed' : 'Product migration completed',
                'added' => $addedCount,
                'updated' => $updatedCount,
                'errors' => $errorCount,
                'log' => $this->migrationLog,
                'missing_attributes' => $missingAttributes,
                'dry_run' => $dryRun
            ];

        } catch (Exception $e) {
            if (!$dryRun && isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error('Product migration error: ' . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Product migration failed: ' . $e->getMessage(),
                'added' => 0,
                'updated' => 0,
                'errors' => 0,
                'log' => [],
                'missing_attributes' => []
            ];
        }
    }

    /**
     * Get Magento 1 product attribute IDs
     */
    protected function getMagento1ProductAttributeIds()
    {
        $entityTypeId = DB::connection($this->magento1Connection)
            ->table($this->magento1Prefix . 'eav_entity_type')
            ->where('entity_type_code', 'catalog_product')
            ->value('entity_type_id');

        if (!$entityTypeId) {
            return [];
        }

        $attributes = ['sku', 'name', 'description', 'short_description', 'price', 'weight', 'status', 'visibility', 'tax_class_id'];
        $attributeIds = [];

        foreach ($attributes as $attrCode) {
            $attrId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', $attrCode)
                ->value('attribute_id');
            if ($attrId) {
                $attributeIds[$attrCode] = $attrId;
            }
        }

        return $attributeIds;
    }

    /**
     * Get all Magento 1 product attributes
     */
    protected function getAllMagento1ProductAttributes()
    {
        $entityTypeId = DB::connection($this->magento1Connection)
            ->table($this->magento1Prefix . 'eav_entity_type')
            ->where('entity_type_code', 'catalog_product')
            ->value('entity_type_id');

        if (!$entityTypeId) {
            return collect([]);
        }

        return DB::connection($this->magento1Connection)
            ->table($this->magento1Prefix . 'eav_attribute')
            ->where('entity_type_id', $entityTypeId)
            ->select('attribute_id', 'attribute_code', 'backend_type', 'frontend_label')
            ->get();
    }

    /**
     * Get all Magento 2 product attribute IDs
     */
    protected function getAllMagento2ProductAttributeIds()
    {
        $entityTypeId = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'eav_entity_type')
            ->where('entity_type_code', 'catalog_product')
            ->value('entity_type_id');

        if (!$entityTypeId) {
            return [];
        }

        $attributes = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'eav_attribute')
            ->where('entity_type_id', $entityTypeId)
            ->select('attribute_id', 'attribute_code')
            ->get();

        $attributeIds = [];
        foreach ($attributes as $attr) {
            $attributeIds[$attr->attribute_code] = $attr->attribute_id;
        }

        return $attributeIds;
    }

    /**
     * Get Magento 2 product attribute IDs
     */
    protected function getMagento2ProductAttributeIds()
    {
        $entityTypeId = DB::connection($this->magento2Connection)
            ->table($this->magento2Prefix . 'eav_entity_type')
            ->where('entity_type_code', 'catalog_product')
            ->value('entity_type_id');

        if (!$entityTypeId) {
            return [];
        }

        $attributes = ['sku', 'name', 'description', 'short_description', 'price', 'weight', 'status', 'visibility', 'tax_class_id'];
        $attributeIds = [];

        foreach ($attributes as $attrCode) {
            $attrId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', $attrCode)
                ->value('attribute_id');
            if ($attrId) {
                $attributeIds[$attrCode] = $attrId;
            }
        }

        return $attributeIds;
    }

    /**
     * Migrate ALL data from ALL catalog_product_entity_* tables for a product
     * This ensures we migrate images, all store views, and all attributes
     */
    protected function migrateAllProductEntityData($m1ProductId, $m2ProductId, $m1EntityTypeId, $m2EntityTypeId, $m1AttributeIds, $m2AttributeIds, $dryRun = false, $allM1Attributes = null)
    {
        $missingAttributes = [];
        
        // All possible backend types for EAV attributes
        $backendTypes = ['varchar', 'int', 'text', 'decimal', 'datetime'];
        
        // Get attribute mapping: M1 attribute_id => M2 attribute_id
        $attributeMapping = [];
        if ($allM1Attributes) {
            foreach ($allM1Attributes as $m1Attr) {
                $attrCode = $m1Attr->attribute_code;
                if (isset($m2AttributeIds[$attrCode])) {
                    $attributeMapping[$m1Attr->attribute_id] = [
                        'm2_attr_id' => $m2AttributeIds[$attrCode],
                        'backend_type' => $m1Attr->backend_type ?? 'varchar',
                        'attribute_code' => $attrCode
                    ];
                }
            }
        }
        
        // Migrate data from each backend type table
        foreach ($backendTypes as $backendType) {
            $m1Table = $this->magento1Prefix . 'catalog_product_entity_' . $backendType;
            $m2Table = $this->magento2Prefix . 'catalog_product_entity_' . $backendType;
            
            try {
                // Check if M1 table exists
                $m1Rows = DB::connection($this->magento1Connection)
                    ->table($m1Table)
                    ->where('entity_id', $m1ProductId)
                    ->get();
                
                if ($m1Rows->isEmpty()) {
                    continue; // No data in this table for this product
                }
                
                // Check if M2 table exists
                try {
                    DB::connection($this->magento2Connection)
                        ->table($m2Table)
                        ->limit(1)
                        ->first();
                } catch (Exception $e) {
                    Log::warning("M2 table {$m2Table} doesn't exist: " . $e->getMessage());
                    continue;
                }
                
                if (!$dryRun) {
                    // Migrate each row
                    foreach ($m1Rows as $m1Row) {
                        $m1AttrId = $m1Row->attribute_id;
                        
                        // Check if we have a mapping for this attribute
                        if (!isset($attributeMapping[$m1AttrId])) {
                            // Attribute doesn't exist in M2, log it
                            if ($allM1Attributes) {
                                $attr = $allM1Attributes->firstWhere('attribute_id', $m1AttrId);
                                if ($attr) {
                                    $missingAttr = [
                                        'code' => $attr->attribute_code ?? 'unknown',
                                        'label' => $attr->frontend_label ?? 'Unknown',
                                        'type' => $attr->backend_type ?? $backendType
                                    ];
                                    // Check if already in list
                                    $exists = false;
                                    foreach ($missingAttributes as $existingAttr) {
                                        if ($existingAttr['code'] === $missingAttr['code']) {
                                            $exists = true;
                                            break;
                                        }
                                    }
                                    if (!$exists) {
                                        $missingAttributes[] = $missingAttr;
                                    }
                                }
                            }
                            continue; // Skip this attribute
                        }
                        
                        $m2AttrId = $attributeMapping[$m1AttrId]['m2_attr_id'];
                        $storeId = $m1Row->store_id ?? 0;
                        
                        // Check if this row already exists in M2
                        $exists = DB::connection($this->magento2Connection)
                            ->table($m2Table)
                            ->where('entity_id', $m2ProductId)
                            ->where('attribute_id', $m2AttrId)
                            ->where('store_id', $storeId)
                            ->exists();
                        
                        if ($exists) {
                            // Update existing row
                            DB::connection($this->magento2Connection)
                                ->table($m2Table)
                                ->where('entity_id', $m2ProductId)
                                ->where('attribute_id', $m2AttrId)
                                ->where('store_id', $storeId)
                                ->update(['value' => $m1Row->value]);
                        } else {
                            // Insert new row
                            DB::connection($this->magento2Connection)
                                ->table($m2Table)
                                ->insert([
                                    'attribute_id' => $m2AttrId,
                                    'store_id' => $storeId,
                                    'entity_id' => $m2ProductId,
                                    'value' => $m1Row->value,
                                ]);
                        }
                    }
                }
            } catch (Exception $e) {
                // Table doesn't exist in M1, skip it
                Log::debug("M1 table {$m1Table} doesn't exist or error: " . $e->getMessage());
                continue;
            }
        }
        
        return $missingAttributes;
    }

    /**
     * Migrate product media gallery images from M1 to M2
     * Populates catalog_product_entity_media_gallery, catalog_product_entity_media_gallery_value,
     * and catalog_product_entity_media_gallery_value_to_entity tables
     */
    protected function migrateProductMediaGallery($m1ProductId, $m2ProductId, $m1EntityTypeId)
    {
        try {
            // Get media_gallery attribute ID from M1
            $m1MediaGalleryAttrId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $m1EntityTypeId)
                ->where('attribute_code', 'media_gallery')
                ->value('attribute_id');

            if (!$m1MediaGalleryAttrId) {
                // Media gallery attribute doesn't exist in M1, skip
                return;
            }

            // Get media_gallery attribute ID from M2
            $m2EntityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            if (!$m2EntityTypeId) {
                return;
            }

            $m2MediaGalleryAttrId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $m2EntityTypeId)
                ->where('attribute_code', 'media_gallery')
                ->value('attribute_id');

            if (!$m2MediaGalleryAttrId) {
                // Media gallery attribute doesn't exist in M2, skip
                return;
            }

            $images = [];

            // First, try to get images from M1 media gallery tables (if they exist)
            try {
                $m1MediaGalleryTable = $this->magento1Prefix . 'catalog_product_entity_media_gallery';
                $m1MediaGalleryValueTable = $this->magento1Prefix . 'catalog_product_entity_media_gallery_value';
                
                // Check if M1 media gallery tables exist
                $m1GalleryImages = DB::connection($this->magento1Connection)
                    ->table($m1MediaGalleryTable)
                    ->where('entity_id', $m1ProductId)
                    ->get();

                if ($m1GalleryImages->isNotEmpty()) {
                    // M1 has media gallery tables, use them
                    foreach ($m1GalleryImages as $m1Image) {
                        $valueId = $m1Image->value_id;
                        
                        // Get value data
                        $m1Value = DB::connection($this->magento1Connection)
                            ->table($m1MediaGalleryValueTable)
                            ->where('value_id', $valueId)
                            ->where('store_id', 0)
                            ->first();

                        $images[] = [
                            'file' => $m1Image->value,
                            'label' => $m1Value->label ?? null,
                            'position' => $m1Value->position ?? 0,
                            'disabled' => $m1Value->disabled ?? 0,
                        ];
                    }
                }
            } catch (Exception $e) {
                // M1 media gallery tables don't exist, fall back to varchar table
                Log::debug("M1 media gallery tables not found, using varchar table: " . $e->getMessage());
            }

            // If no images from gallery tables, try varchar table (serialized data)
            if (empty($images)) {
                $m1MediaGalleryData = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'catalog_product_entity_varchar')
                    ->where('entity_id', $m1ProductId)
                    ->where('attribute_id', $m1MediaGalleryAttrId)
                    ->where('store_id', 0)
                    ->value('value');

                if (empty($m1MediaGalleryData)) {
                    // No media gallery data in M1, skip
                    return;
                }

                // Parse the media gallery data (Magento 1 stores it as serialized PHP)
                if (is_string($m1MediaGalleryData)) {
                    // Try to unserialize (Magento 1 format)
                    $unserialized = @unserialize($m1MediaGalleryData);
                    if ($unserialized !== false && is_array($unserialized)) {
                        $parsedImages = $unserialized;
                    } else {
                        // Try JSON decode (some versions might use JSON)
                        $jsonDecoded = @json_decode($m1MediaGalleryData, true);
                        if (is_array($jsonDecoded)) {
                            $parsedImages = $jsonDecoded;
                        } else {
                            // If it's a simple string, treat it as a single image path
                            if (!empty(trim($m1MediaGalleryData))) {
                                $parsedImages = [['file' => trim($m1MediaGalleryData)]];
                            } else {
                                $parsedImages = [];
                            }
                        }
                    }

                    // Convert parsed images to our format
                    if (!empty($parsedImages)) {
                        if (isset($parsedImages['images']) && is_array($parsedImages['images'])) {
                            $parsedImages = $parsedImages['images'];
                        }

                        foreach ($parsedImages as $img) {
                            if (is_string($img)) {
                                $images[] = ['file' => $img];
                            } elseif (is_array($img)) {
                                $images[] = [
                                    'file' => $img['file'] ?? $img['value'] ?? null,
                                    'label' => $img['label'] ?? $img['label_default'] ?? null,
                                    'position' => isset($img['position']) ? (int)$img['position'] : 0,
                                    'disabled' => isset($img['disabled']) ? (int)$img['disabled'] : 0,
                                ];
                            }
                        }
                    }
                }
            }

            if (empty($images)) {
                return;
            }

            // Process each image
            foreach ($images as $imageData) {
                // Handle different data structures
                $imageFile = null;
                $label = null;
                $position = 0;
                $disabled = 0;

                if (is_string($imageData)) {
                    // Simple string path
                    $imageFile = $imageData;
                } elseif (is_array($imageData)) {
                    // Array structure
                    $imageFile = $imageData['file'] ?? $imageData['value'] ?? null;
                    $label = $imageData['label'] ?? $imageData['label_default'] ?? null;
                    $position = isset($imageData['position']) ? (int)$imageData['position'] : 0;
                    $disabled = isset($imageData['disabled']) ? (int)$imageData['disabled'] : 0;
                }

                if (empty($imageFile)) {
                    continue;
                }

                // Clean up the image file path (remove leading slashes, etc.)
                $imageFile = ltrim($imageFile, '/');
                if (empty($imageFile)) {
                    continue;
                }

                // Check if this image already exists in M2 for this product
                $existingValueId = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery')
                    ->where('attribute_id', $m2MediaGalleryAttrId)
                    ->where('value', $imageFile)
                    ->value('value_id');

                if (!$existingValueId) {
                    // Insert into catalog_product_entity_media_gallery
                    $valueId = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery')
                        ->insertGetId([
                            'attribute_id' => $m2MediaGalleryAttrId,
                            'value' => $imageFile,
                        ]);
                } else {
                    $valueId = $existingValueId;
                }

                // Check if value_to_entity link already exists
                $linkExists = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery_value_to_entity')
                    ->where('value_id', $valueId)
                    ->where('entity_id', $m2ProductId)
                    ->exists();

                if (!$linkExists) {
                    // Insert into catalog_product_entity_media_gallery_value_to_entity
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery_value_to_entity')
                        ->insert([
                            'value_id' => $valueId,
                            'entity_id' => $m2ProductId,
                        ]);
                }

                // Insert/update catalog_product_entity_media_gallery_value for default store (store_id = 0)
                $valueExists = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery_value')
                    ->where('value_id', $valueId)
                    ->where('store_id', 0)
                    ->exists();

                if (!$valueExists) {
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery_value')
                        ->insert([
                            'value_id' => $valueId,
                            'store_id' => 0,
                            'label' => $label,
                            'position' => $position,
                            'disabled' => $disabled,
                        ]);
                } else {
                    // Update existing value
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_product_entity_media_gallery_value')
                        ->where('value_id', $valueId)
                        ->where('store_id', 0)
                        ->update([
                            'label' => $label,
                            'position' => $position,
                            'disabled' => $disabled,
                        ]);
                }
            }

        } catch (Exception $e) {
            // Log error but don't fail the entire migration
            Log::warning("Error migrating media gallery for product M1 ID {$m1ProductId} -> M2 ID {$m2ProductId}: " . $e->getMessage());
        }
    }

    /**
     * Migrate product attributes from M1 to M2
     */
    protected function migrateProductAttributes($m1ProductId, $m2ProductId, $m1EntityTypeId, $m2EntityTypeId, $m1AttributeIds, $m2AttributeIds, $isNew, $dryRun = false, $allM1Attributes = null)
    {
        $missingAttributes = [];

        // Get attribute backend types for all M1 attributes
        $m1AttributeTypes = [];
        if (!empty($m1AttributeIds)) {
            $m1AttributeTypes = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $m1EntityTypeId)
                ->whereIn('attribute_id', array_values($m1AttributeIds))
                ->pluck('backend_type', 'attribute_id')
                ->toArray();
        }

        $m2AttributeTypes = [];
        if (!empty($m2AttributeIds)) {
            $m2AttributeTypes = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $m2EntityTypeId)
                ->whereIn('attribute_id', array_values($m2AttributeIds))
                ->pluck('backend_type', 'attribute_id')
                ->toArray();
        }

        // Migrate each attribute
        foreach ($m1AttributeIds as $attrCode => $m1AttrId) {
            // Check if attribute exists in M2
            if (!isset($m2AttributeIds[$attrCode])) {
                // Attribute doesn't exist in M2
                if ($allM1Attributes) {
                    $attr = $allM1Attributes->firstWhere('attribute_id', $m1AttrId);
                    if ($attr) {
                        $missingAttributes[] = [
                            'code' => $attrCode,
                            'label' => $attr->frontend_label ?? $attrCode,
                            'type' => $attr->backend_type ?? 'varchar'
                        ];
                    }
                }
                continue;
            }

            $m2AttrId = $m2AttributeIds[$attrCode];
            $backendType = $m1AttributeTypes[$m1AttrId] ?? 'varchar';

            // Handle static attributes (stored in main entity table)
            if ($backendType === 'static') {
                // Static attributes are columns in catalog_product_entity table
                // Skip for now as they're usually handled during entity creation
                continue;
            }

            // Get M1 attribute value
            $m1Table = $this->magento1Prefix . 'catalog_product_entity_' . $backendType;
            
            try {
                $m1Value = DB::connection($this->magento1Connection)
                    ->table($m1Table)
                    ->where('entity_id', $m1ProductId)
                    ->where('attribute_id', $m1AttrId)
                    ->where('store_id', 0)
                    ->value('value');
            } catch (Exception $e) {
                // Table doesn't exist - this means the attribute table is missing
                // Track this as a missing attribute/table
                if ($allM1Attributes) {
                    $attr = $allM1Attributes->firstWhere('attribute_id', $m1AttrId);
                    if ($attr) {
                        $missingAttr = [
                            'code' => $attrCode,
                            'label' => $attr->frontend_label ?? $attrCode,
                            'type' => $backendType
                        ];
                        // Check if already in list
                        $exists = false;
                        foreach ($missingAttributes as $existingAttr) {
                            if ($existingAttr['code'] === $missingAttr['code']) {
                                $exists = true;
                                break;
                            }
                        }
                        if (!$exists) {
                            $missingAttributes[] = $missingAttr;
                        }
                    }
                }
                Log::warning("Table {$m1Table} doesn't exist for attribute {$attrCode}: " . $e->getMessage());
                continue;
            }

            if ($m1Value === null) {
                continue; // No value in M1
            }

            if (!$dryRun) {
                // Insert or update in M2
                $m2Table = $this->magento2Prefix . 'catalog_product_entity_' . $backendType;
                $exists = DB::connection($this->magento2Connection)
                    ->table($m2Table)
                    ->where('entity_id', $m2ProductId)
                    ->where('attribute_id', $m2AttrId)
                    ->where('store_id', 0)
                    ->exists();

                if ($exists) {
                    DB::connection($this->magento2Connection)
                        ->table($m2Table)
                        ->where('entity_id', $m2ProductId)
                        ->where('attribute_id', $m2AttrId)
                        ->where('store_id', 0)
                        ->update(['value' => $m1Value]);
                } else {
                    DB::connection($this->magento2Connection)
                        ->table($m2Table)
                        ->insert([
                            'attribute_id' => $m2AttrId,
                            'store_id' => 0,
                            'entity_id' => $m2ProductId,
                            'value' => $m1Value,
                        ]);
                }
            }
        }

        return $missingAttributes;
    }

    /**
     * Delete a single product from Magento 2
     */
    public function deleteM2Product($productId)
    {
        try {
            // Check if product exists
            $product = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_product_entity')
                ->where('entity_id', $productId)
                ->first();

            if (!$product) {
                return [
                    'success' => false,
                    'message' => 'Product not found in Magento 2'
                ];
            }

            DB::connection($this->magento2Connection)->beginTransaction();

            try {
                // Delete product attributes
                $attributeTables = ['varchar', 'int', 'text', 'decimal', 'datetime'];
                foreach ($attributeTables as $tableType) {
                    $table = $this->magento2Prefix . 'catalog_product_entity_' . $tableType;
                    try {
                        DB::connection($this->magento2Connection)
                            ->table($table)
                            ->where('entity_id', $productId)
                            ->delete();
                    } catch (Exception $e) {
                        // Table might not exist, continue
                        Log::warning("Table {$table} might not exist: " . $e->getMessage());
                    }
                }

                // Delete category associations
                try {
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_category_product')
                        ->where('product_id', $productId)
                        ->delete();
                } catch (Exception $e) {
                    Log::warning("Table {$this->magento2Prefix}catalog_category_product might not exist: " . $e->getMessage());
                }

                // Delete stock items if they exist
                try {
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'cataloginventory_stock_item')
                        ->where('product_id', $productId)
                        ->delete();
                } catch (Exception $e) {
                    // Table might not exist, continue
                }

                // Delete the product entity
                DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_product_entity')
                    ->where('entity_id', $productId)
                    ->delete();

                DB::connection($this->magento2Connection)->commit();

                return [
                    'success' => true,
                    'message' => "Product ID {$productId} deleted successfully"
                ];

            } catch (Exception $e) {
                DB::connection($this->magento2Connection)->rollBack();
                throw $e;
            }

        } catch (Exception $e) {
            Log::error('Error deleting M2 product: ' . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Failed to delete product: ' . $e->getMessage()
            ];
        }
    }

    /**
     * Sync product category assignments from M1 to M2
     * Updates M2 products to be in the same categories as their M1 counterparts
     */
    public function syncProductCategories()
    {
        try {
            $this->migrationLog = [];
            $updatedCount = 0;
            $skippedCount = 0;
            $errorCount = 0;

            // Get category mapping
            $categoryMapping = $this->getCategoryMapping();
            
            if (empty($categoryMapping)) {
                return [
                    'success' => false,
                    'message' => 'No category mapping found. Please migrate categories first.',
                    'updated' => 0,
                    'skipped' => 0,
                    'errors' => 0,
                    'log' => []
                ];
            }

            // Get all M1 products with their category associations
            $m1Products = $this->getMagento1Products();
            $m2Products = $this->getMagento2Products();

            // Create lookup maps for M2 products
            $m2ProductBySku = [];
            $m2ProductById = [];
            foreach ($m2Products as $m2Product) {
                $sku = $m2Product->sku ?? 'N/A';
                if ($sku !== 'N/A' && !empty($sku)) {
                    $m2ProductBySku[$sku] = $m2Product->entity_id;
                }
                $m2ProductById[$m2Product->entity_id] = $m2Product->entity_id;
            }

            DB::connection($this->magento2Connection)->beginTransaction();

            foreach ($m1Products as $m1Product) {
                try {
                    // Find corresponding M2 product
                    $m2ProductId = null;
                    $m1Sku = $m1Product->sku ?? 'N/A';
                    
                    if ($m1Sku !== 'N/A' && !empty($m1Sku)) {
                        // Match by SKU
                        if (isset($m2ProductBySku[$m1Sku])) {
                            $m2ProductId = $m2ProductBySku[$m1Sku];
                        }
                    } else {
                        // Match by product ID
                        if (isset($m2ProductById[$m1Product->entity_id])) {
                            $m2ProductId = $m1Product->entity_id;
                        }
                    }

                    if (!$m2ProductId) {
                        $skippedCount++;
                        $this->migrationLog[] = "SKIPPED: M1 Product ID {$m1Product->entity_id} (SKU: {$m1Sku}) - not found in M2";
                        continue;
                    }

                    // Ensure product is enabled and visible (required for products to show in categories after reindex)
                    $this->ensureProductIsEnabledAndVisible($m2ProductId);

                    // Get M1 product categories
                    $m1Categories = DB::connection($this->magento1Connection)
                        ->table($this->magento1Prefix . 'catalog_category_product')
                        ->where('product_id', $m1Product->entity_id)
                        ->get();

                    if ($m1Categories->isEmpty()) {
                        $skippedCount++;
                        $this->migrationLog[] = "SKIPPED: M1 Product ID {$m1Product->entity_id} (SKU: {$m1Sku}) - no categories in M1";
                        continue;
                    }

                    // Get current M2 product categories
                    $m2CurrentCategories = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_category_product')
                        ->where('product_id', $m2ProductId)
                        ->pluck('category_id')
                        ->toArray();

                    // Build expected M2 categories from M1 categories using mapping
                    $expectedM2Categories = [];
                    $categoriesToAdd = [];
                    $unmappedCategories = [];
                    
                    foreach ($m1Categories as $m1Category) {
                        if (isset($categoryMapping[$m1Category->category_id])) {
                            $m2CategoryId = $categoryMapping[$m1Category->category_id];
                            $expectedM2Categories[] = $m2CategoryId;
                            
                            // Check if this category association needs to be added
                            if (!in_array($m2CategoryId, $m2CurrentCategories)) {
                                $categoriesToAdd[] = [
                                    'category_id' => $m2CategoryId,
                                    'product_id' => $m2ProductId,
                                    'position' => $m1Category->position ?? 0,
                                ];
                            }
                        } else {
                            // Category not in mapping - try to find it by name
                            $m1CategoryName = $this->getCategoryNameById($m1Category->category_id, 'm1');
                            if ($m1CategoryName) {
                                $m2CategoryId = $this->findCategoryByName($m1CategoryName, 'm2');
                                if ($m2CategoryId) {
                                    // Found by name, add to mapping for future use
                                    $categoryMapping[$m1Category->category_id] = $m2CategoryId;
                                    $expectedM2Categories[] = $m2CategoryId;
                                    
                                    if (!in_array($m2CategoryId, $m2CurrentCategories)) {
                                        $categoriesToAdd[] = [
                                            'category_id' => $m2CategoryId,
                                            'product_id' => $m2ProductId,
                                            'position' => $m1Category->position ?? 0,
                                        ];
                                    }
                                    $this->migrationLog[] = "FOUND BY NAME: M1 Category ID {$m1Category->category_id} ({$m1CategoryName}) -> M2 Category ID {$m2CategoryId}";
                                } else {
                                    $unmappedCategories[] = $m1CategoryName ?: "ID {$m1Category->category_id}";
                                }
                            } else {
                                $unmappedCategories[] = "ID {$m1Category->category_id}";
                            }
                        }
                    }
                    
                    if (!empty($unmappedCategories)) {
                        $this->migrationLog[] = "WARNING: M2 Product ID {$m2ProductId} (SKU: {$m1Sku}) - M1 categories not found in M2: " . implode(', ', $unmappedCategories);
                    }

                    // Remove categories that are in M2 but not in M1 (after mapping)
                    $categoriesToRemove = array_diff($m2CurrentCategories, $expectedM2Categories);

                    // Add missing category associations
                    foreach ($categoriesToAdd as $categoryData) {
                        DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_category_product')
                            ->insert($categoryData);
                    }

                    // Remove categories that shouldn't be there
                    if (!empty($categoriesToRemove)) {
                        DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_category_product')
                            ->where('product_id', $m2ProductId)
                            ->whereIn('category_id', $categoriesToRemove)
                            ->delete();
                    }

                    if (!empty($categoriesToAdd) || !empty($categoriesToRemove)) {
                        $updatedCount++;
                        $addedCount = count($categoriesToAdd);
                        $removedCount = count($categoriesToRemove);
                        $this->migrationLog[] = "UPDATED: M2 Product ID {$m2ProductId} (SKU: {$m1Sku}) - Added {$addedCount} category(ies), Removed {$removedCount} category(ies)";
                    } else {
                        $skippedCount++;
                        $this->migrationLog[] = "SKIPPED: M2 Product ID {$m2ProductId} (SKU: {$m1Sku}) - categories already match";
                    }

                } catch (Exception $e) {
                    $errorCount++;
                    $m1Sku = $m1Product->sku ?? 'N/A';
                    $this->migrationLog[] = "ERROR: Failed to sync categories for M1 Product ID {$m1Product->entity_id} (SKU: {$m1Sku}): " . $e->getMessage();
                    Log::error("Error syncing product categories for M1 Product ID {$m1Product->entity_id}: " . $e->getMessage());
                }
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => "Synced product categories. Updated: {$updatedCount}, Skipped: {$skippedCount}, Errors: {$errorCount}",
                'updated' => $updatedCount,
                'skipped' => $skippedCount,
                'errors' => $errorCount,
                'log' => $this->migrationLog
            ];

        } catch (Exception $e) {
            if (isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error('Error syncing product categories: ' . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Failed to sync product categories: ' . $e->getMessage(),
                'updated' => 0,
                'skipped' => 0,
                'errors' => 0,
                'log' => $this->migrationLog
            ];
        }
    }

    /**
     * Delete all products in Magento 2 that have entity_id greater than max M1 product ID
     */
    public function deleteM2ProductsAboveM1Max()
    {
        try {
            // Get max product ID from M1
            $maxM1ProductId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'catalog_product_entity')
                ->max('entity_id');

            if (!$maxM1ProductId) {
                return [
                    'success' => false,
                    'message' => 'No products found in Magento 1',
                    'deleted' => 0
                ];
            }

            // Get products to delete from M2
            $productsToDelete = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_product_entity')
                ->where('entity_id', '>', $maxM1ProductId)
                ->pluck('entity_id')
                ->toArray();

            if (empty($productsToDelete)) {
                return [
                    'success' => true,
                    'message' => 'No products found to delete',
                    'deleted' => 0,
                    'max_m1_id' => $maxM1ProductId
                ];
            }

            $deletedCount = 0;
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            DB::connection($this->magento2Connection)->beginTransaction();

            foreach ($productsToDelete as $productId) {
                try {
                    // Delete product attributes
                    $attributeTables = ['varchar', 'int', 'text', 'decimal', 'datetime'];
                    foreach ($attributeTables as $tableType) {
                        $table = $this->magento2Prefix . 'catalog_product_entity_' . $tableType;
                        try {
                            DB::connection($this->magento2Connection)
                                ->table($table)
                                ->where('entity_id', $productId)
                                ->delete();
                        } catch (Exception $e) {
                            // Table might not exist, continue
                            Log::warning("Table {$table} might not exist: " . $e->getMessage());
                        }
                    }

                    // Delete category associations
                    try {
                        DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_category_product')
                            ->where('product_id', $productId)
                            ->delete();
                    } catch (Exception $e) {
                        Log::warning("Table {$this->magento2Prefix}catalog_category_product might not exist: " . $e->getMessage());
                    }

                    // Delete stock items if they exist
                    try {
                        DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'cataloginventory_stock_item')
                            ->where('product_id', $productId)
                            ->delete();
                    } catch (Exception $e) {
                        // Table might not exist, continue
                    }

                    // Delete the product entity
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_product_entity')
                        ->where('entity_id', $productId)
                        ->delete();

                    $deletedCount++;
                } catch (Exception $e) {
                    Log::error("Error deleting product {$productId}: " . $e->getMessage());
                }
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => "Deleted {$deletedCount} product(s) with ID > {$maxM1ProductId}",
                'deleted' => $deletedCount,
                'max_m1_id' => $maxM1ProductId
            ];

        } catch (Exception $e) {
            if (isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error('Error deleting M2 products above M1 max: ' . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Failed to delete products: ' . $e->getMessage(),
                'deleted' => 0
            ];
        }
    }

    /**
     * Migrate product category associations
     */
    protected function migrateProductCategories($m1ProductId, $m2ProductId, $categoryMapping)
    {
        // Get M1 product categories
        $m1Categories = DB::connection($this->magento1Connection)
            ->table($this->magento1Prefix . 'catalog_category_product')
            ->where('product_id', $m1ProductId)
            ->get();

        foreach ($m1Categories as $m1Category) {
            // Find corresponding M2 category
            if (isset($categoryMapping[$m1Category->category_id])) {
                $m2CategoryId = $categoryMapping[$m1Category->category_id];

                // Check if association already exists
                $exists = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'catalog_category_product')
                    ->where('category_id', $m2CategoryId)
                    ->where('product_id', $m2ProductId)
                    ->exists();

                if (!$exists) {
                    DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_category_product')
                        ->insert([
                            'category_id' => $m2CategoryId,
                            'product_id' => $m2ProductId,
                            'position' => $m1Category->position ?? 0,
                        ]);
                }
            }
        }
    }

    /**
     * Ensure product is enabled and visible (required for products to appear in categories after reindex)
     */
    protected function ensureProductIsEnabledAndVisible($productId)
    {
        try {
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return;
            }

            // Get attribute IDs
            $statusAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'status')
                ->value('attribute_id');

            $visibilityAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'visibility')
                ->value('attribute_id');

            // Set status to 1 (enabled) if not already set
            if ($statusAttributeId) {
                $statusTable = $this->magento2Prefix . 'catalog_product_entity_int';
                $hasStatus = DB::connection($this->magento2Connection)
                    ->table($statusTable)
                    ->where('entity_id', $productId)
                    ->where('attribute_id', $statusAttributeId)
                    ->where('store_id', 0)
                    ->exists();

                if (!$hasStatus) {
                    DB::connection($this->magento2Connection)
                        ->table($statusTable)
                        ->insert([
                            'attribute_id' => $statusAttributeId,
                            'store_id' => 0,
                            'entity_id' => $productId,
                            'value' => 1, // Enabled
                        ]);
                } else {
                    // Update to enabled if it's disabled
                    DB::connection($this->magento2Connection)
                        ->table($statusTable)
                        ->where('entity_id', $productId)
                        ->where('attribute_id', $statusAttributeId)
                        ->where('store_id', 0)
                        ->update(['value' => 1]);
                }
            }

            // Set visibility to 4 (Catalog, Search) if not already set
            if ($visibilityAttributeId) {
                $visibilityTable = $this->magento2Prefix . 'catalog_product_entity_int';
                $hasVisibility = DB::connection($this->magento2Connection)
                    ->table($visibilityTable)
                    ->where('entity_id', $productId)
                    ->where('attribute_id', $visibilityAttributeId)
                    ->where('store_id', 0)
                    ->exists();

                if (!$hasVisibility) {
                    DB::connection($this->magento2Connection)
                        ->table($visibilityTable)
                        ->insert([
                            'attribute_id' => $visibilityAttributeId,
                            'store_id' => 0,
                            'entity_id' => $productId,
                            'value' => 4, // Catalog, Search
                        ]);
                } else {
                    // Update to Catalog, Search if it's Not Visible or Search Only
                    $currentVisibility = DB::connection($this->magento2Connection)
                        ->table($visibilityTable)
                        ->where('entity_id', $productId)
                        ->where('attribute_id', $visibilityAttributeId)
                        ->where('store_id', 0)
                        ->value('value');

                    // Only update if visibility is 1 (Not Visible) or 2 (Catalog)
                    // 3 = Search, 4 = Catalog, Search (both)
                    if ($currentVisibility == 1 || $currentVisibility == 2) {
                        DB::connection($this->magento2Connection)
                            ->table($visibilityTable)
                            ->where('entity_id', $productId)
                            ->where('attribute_id', $visibilityAttributeId)
                            ->where('store_id', 0)
                            ->update(['value' => 4]);
                    }
                }
            }
        } catch (Exception $e) {
            Log::warning("Error ensuring product {$productId} is enabled and visible: " . $e->getMessage());
        }
    }

    /**
     * Get Magento 1 category tree with products
     */
    public function getMagento1CategoryTreeWithProducts()
    {
        try {
            $categories = $this->getMagento1Categories();
            $categoryMap = [];
            
            // Build category map
            foreach ($categories as $category) {
                $categoryMap[$category->entity_id] = [
                    'id' => $category->entity_id,
                    'name' => $category->name,
                    'parent_id' => $category->parent_id,
                    'is_active' => $category->is_active ?? true,
                    'path' => $category->path ?? '',
                    'children' => [],
                    'products' => []
                ];
            }

            // Get all products in categories
            $categoryProducts = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'catalog_category_product')
                ->select('category_id', 'product_id', 'position')
                ->orderBy('category_id')
                ->orderBy('position')
                ->get();

            // Get product details
            $productIds = $categoryProducts->pluck('product_id')->unique()->toArray();
            $products = [];
            
            if (!empty($productIds)) {
                // Check if SKU column exists in entity table
                $hasSkuColumn = false;
                try {
                    $testQuery = DB::connection($this->magento1Connection)
                        ->table($this->magento1Prefix . 'catalog_product_entity')
                        ->select('sku')
                        ->limit(1)
                        ->first();
                    $hasSkuColumn = true;
                } catch (Exception $e) {
                    $hasSkuColumn = false;
                }

                $entityTypeId = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'eav_entity_type')
                    ->where('entity_type_code', 'catalog_product')
                    ->value('entity_type_id');

                if ($entityTypeId) {
                    // Get SKU attribute ID (for EAV storage)
                    $skuAttributeId = DB::connection($this->magento1Connection)
                        ->table($this->magento1Prefix . 'eav_attribute')
                        ->where('entity_type_id', $entityTypeId)
                        ->where('attribute_code', 'sku')
                        ->value('attribute_id');

                    // Get name attribute ID
                    $nameAttributeId = DB::connection($this->magento1Connection)
                        ->table($this->magento1Prefix . 'eav_attribute')
                        ->where('entity_type_id', $entityTypeId)
                        ->where('attribute_code', 'name')
                        ->value('attribute_id');

                    // Get SKUs - from entity table or EAV
                    $skus = [];
                    if ($hasSkuColumn) {
                        // SKU is stored in entity table
                        $skuValues = DB::connection($this->magento1Connection)
                            ->table($this->magento1Prefix . 'catalog_product_entity')
                            ->whereIn('entity_id', $productIds)
                            ->pluck('sku', 'entity_id')
                            ->toArray();
                        $skus = $skuValues;
                    } else if ($skuAttributeId) {
                        // SKU is stored in EAV table
                        $skuValues = DB::connection($this->magento1Connection)
                            ->table($this->magento1Prefix . 'catalog_product_entity_varchar')
                            ->where('attribute_id', $skuAttributeId)
                            ->where('store_id', 0)
                            ->whereIn('entity_id', $productIds)
                            ->pluck('value', 'entity_id')
                            ->toArray();
                        $skus = $skuValues;
                    }

                    // Get names
                    $names = [];
                    if ($nameAttributeId) {
                        $nameValues = DB::connection($this->magento1Connection)
                            ->table($this->magento1Prefix . 'catalog_product_entity_varchar')
                            ->where('attribute_id', $nameAttributeId)
                            ->where('store_id', 0)
                            ->whereIn('entity_id', $productIds)
                            ->pluck('value', 'entity_id')
                            ->toArray();
                        $names = $nameValues;
                    }

                    // Build products array
                    foreach ($productIds as $productId) {
                        $sku = $skus[$productId] ?? 'N/A';
                        $products[$productId] = [
                            'id' => $productId,
                            'sku' => !empty($sku) ? $sku : 'N/A',
                            'name' => $names[$productId] ?? 'Unnamed Product'
                        ];
                    }
                }
            }

            // Assign products to categories
            foreach ($categoryProducts as $cp) {
                if (isset($categoryMap[$cp->category_id]) && isset($products[$cp->product_id])) {
                    $categoryMap[$cp->category_id]['products'][] = [
                        'id' => $products[$cp->product_id]['id'],
                        'sku' => $products[$cp->product_id]['sku'],
                        'name' => $products[$cp->product_id]['name'],
                        'position' => $cp->position ?? 0
                    ];
                }
            }

            // Build tree structure
            $tree = [];
            foreach ($categoryMap as $categoryId => $category) {
                if ($category['parent_id'] == 0 || $category['parent_id'] == 1) {
                    // Root category
                    $tree[] = $this->buildCategoryTreeWithProducts($category, $categoryMap);
                }
            }

            return $tree;
        } catch (Exception $e) {
            Log::error('Error fetching M1 category tree with products: ' . $e->getMessage());
            return [];
        }
    }

    /**
     * Get Magento 2 category tree with products
     */
    public function getMagento2CategoryTreeWithProducts()
    {
        try {
            $categories = $this->getMagento2Categories();
            $categoryMap = [];
            
            // Build category map
            foreach ($categories as $category) {
                $categoryMap[$category->entity_id] = [
                    'id' => $category->entity_id,
                    'name' => $category->name,
                    'parent_id' => $category->parent_id,
                    'is_active' => $category->is_active ?? true,
                    'path' => $category->path ?? '',
                    'children' => [],
                    'products' => []
                ];
            }

            // Get all products in categories
            $categoryProducts = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_product')
                ->select('category_id', 'product_id', 'position')
                ->orderBy('category_id')
                ->orderBy('position')
                ->get();

            // Get product details
            $productIds = $categoryProducts->pluck('product_id')->unique()->toArray();
            $products = [];
            
            if (!empty($productIds)) {
                // Check if SKU column exists in entity table
                $hasSkuColumn = false;
                try {
                    $testQuery = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'catalog_product_entity')
                        ->select('sku')
                        ->limit(1)
                        ->first();
                    $hasSkuColumn = true;
                } catch (Exception $e) {
                    $hasSkuColumn = false;
                }

                $entityTypeId = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'eav_entity_type')
                    ->where('entity_type_code', 'catalog_product')
                    ->value('entity_type_id');

                if ($entityTypeId) {
                    // Get SKU attribute ID (for EAV storage)
                    $skuAttributeId = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'eav_attribute')
                        ->where('entity_type_id', $entityTypeId)
                        ->where('attribute_code', 'sku')
                        ->value('attribute_id');

                    // Get name attribute ID
                    $nameAttributeId = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'eav_attribute')
                        ->where('entity_type_id', $entityTypeId)
                        ->where('attribute_code', 'name')
                        ->value('attribute_id');

                    // Get SKUs - from entity table or EAV
                    $skus = [];
                    if ($hasSkuColumn) {
                        // SKU is stored in entity table
                        $skuValues = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_product_entity')
                            ->whereIn('entity_id', $productIds)
                            ->pluck('sku', 'entity_id')
                            ->toArray();
                        $skus = $skuValues;
                    } else if ($skuAttributeId) {
                        // SKU is stored in EAV table
                        $skuValues = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                            ->where('attribute_id', $skuAttributeId)
                            ->where('store_id', 0)
                            ->whereIn('entity_id', $productIds)
                            ->pluck('value', 'entity_id')
                            ->toArray();
                        $skus = $skuValues;
                    }

                    // Get names
                    $names = [];
                    if ($nameAttributeId) {
                        $nameValues = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                            ->where('attribute_id', $nameAttributeId)
                            ->where('store_id', 0)
                            ->whereIn('entity_id', $productIds)
                            ->pluck('value', 'entity_id')
                            ->toArray();
                        $names = $nameValues;
                    }

                    // Build products array
                    foreach ($productIds as $productId) {
                        $sku = $skus[$productId] ?? 'N/A';
                        $products[$productId] = [
                            'id' => $productId,
                            'sku' => !empty($sku) ? $sku : 'N/A',
                            'name' => $names[$productId] ?? 'Unnamed Product'
                        ];
                    }
                }
            }

            // Assign products to categories
            foreach ($categoryProducts as $cp) {
                if (isset($categoryMap[$cp->category_id]) && isset($products[$cp->product_id])) {
                    $categoryMap[$cp->category_id]['products'][] = [
                        'id' => $products[$cp->product_id]['id'],
                        'sku' => $products[$cp->product_id]['sku'],
                        'name' => $products[$cp->product_id]['name'],
                        'position' => $cp->position ?? 0
                    ];
                }
            }

            // Build tree structure
            $tree = [];
            foreach ($categoryMap as $categoryId => $category) {
                if ($category['parent_id'] == 0 || $category['parent_id'] == 1) {
                    // Root category
                    $tree[] = $this->buildCategoryTreeWithProducts($category, $categoryMap);
                }
            }

            return $tree;
        } catch (Exception $e) {
            Log::error('Error fetching M2 category tree with products: ' . $e->getMessage());
            return [];
        }
    }

    /**
     * Build category tree structure with products recursively
     */
    protected function buildCategoryTreeWithProducts($category, $categoryMap)
    {
        $node = [
            'id' => $category['id'],
            'name' => $category['name'],
            'is_active' => $category['is_active'],
            'products' => $category['products'],
            'children' => []
        ];

        // Find children
        foreach ($categoryMap as $catId => $cat) {
            if ($cat['parent_id'] == $category['id']) {
                $node['children'][] = $this->buildCategoryTreeWithProducts($cat, $categoryMap);
            }
        }

        return $node;
    }

    /**
     * Get category name by ID
     */
    protected function getCategoryNameById($categoryId, $source = 'm1')
    {
        try {
            $connection = $source === 'm1' ? $this->magento1Connection : $this->magento2Connection;
            $prefix = $source === 'm1' ? $this->magento1Prefix : $this->magento2Prefix;
            
            $entityTypeId = DB::connection($connection)
                ->table($prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');
            
            if (!$entityTypeId) {
                return null;
            }
            
            $nameAttributeId = DB::connection($connection)
                ->table($prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');
            
            if (!$nameAttributeId) {
                return null;
            }
            
            $name = DB::connection($connection)
                ->table($prefix . 'catalog_category_entity_varchar')
                ->where('entity_id', $categoryId)
                ->where('attribute_id', $nameAttributeId)
                ->where('store_id', 0)
                ->value('value');
            
            return $name;
        } catch (Exception $e) {
            Log::warning("Error getting category name for ID {$categoryId}: " . $e->getMessage());
            return null;
        }
    }

    /**
     * Find category by name (case-insensitive, matches any parent)
     */
    protected function findCategoryByName($categoryName, $source = 'm2')
    {
        try {
            $connection = $source === 'm1' ? $this->magento1Connection : $this->magento2Connection;
            $prefix = $source === 'm1' ? $this->magento1Prefix : $this->magento2Prefix;
            
            $entityTypeId = DB::connection($connection)
                ->table($prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_category')
                ->value('entity_type_id');
            
            if (!$entityTypeId) {
                return null;
            }
            
            $nameAttributeId = DB::connection($connection)
                ->table($prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'name')
                ->value('attribute_id');
            
            if (!$nameAttributeId) {
                return null;
            }
            
            // Find category by name (case-insensitive)
            $category = DB::connection($connection)
                ->table($prefix . 'catalog_category_entity_varchar')
                ->where('attribute_id', $nameAttributeId)
                ->where('store_id', 0)
                ->whereRaw('LOWER(value) = ?', [strtolower(trim($categoryName))])
                ->first();
            
            return $category ? $category->entity_id : null;
        } catch (Exception $e) {
            Log::warning("Error finding category by name '{$categoryName}': " . $e->getMessage());
            return null;
        }
    }

    /**
     * Get category mapping from previous migrations
     */
protected function getCategoryMapping()
    {
        // Try to get mapping from category_mapping table or build it from existing categories
        // Build it by matching category names (case-insensitive, ignoring parent differences)
        $mapping = [];

        try {
            $m1Categories = $this->getMagento1Categories();
            $m2Categories = $this->getMagento2Categories();

            // Create a map of M2 categories by normalized name (case-insensitive)
            // Use the first match if multiple categories have the same name
            $m2CategoryMap = [];
            foreach ($m2Categories as $m2Cat) {
                $normalizedName = strtolower(trim($m2Cat->name ?? ''));
                if (!empty($normalizedName) && !isset($m2CategoryMap[$normalizedName])) {
                    $m2CategoryMap[$normalizedName] = $m2Cat->entity_id;
                }
            }

            // Match M1 categories to M2 by normalized name
            foreach ($m1Categories as $m1Cat) {
                $normalizedName = strtolower(trim($m1Cat->name ?? ''));
                if (!empty($normalizedName) && isset($m2CategoryMap[$normalizedName])) {
                    $mapping[$m1Cat->entity_id] = $m2CategoryMap[$normalizedName];
                }
            }
        } catch (Exception $e) {
            Log::warning('Error building category mapping: ' . $e->getMessage());
        }

        return $mapping;
    }

    /**
     * Recursively delete all children of a category
     */
    protected function deleteCategoryChildren($categoryId, $connection, $prefix)
    {
        // Get all children
        $children = DB::connection($connection)
            ->table($prefix . 'catalog_category_entity')
            ->where('parent_id', $categoryId)
            ->get();

        // Recursively delete each child
        foreach ($children as $child) {
            $this->deleteCategoryChildren($child->entity_id, $connection, $prefix);
            $this->deleteCategoryData($child->entity_id, $connection, $prefix);
        }
    }

    /**
     * Fix category products - ensure products are added to categories if missing from catalog_category_product table
     * Only looks at M2 products and their category_ids attribute
     */
    public function fixCategoryProducts()
    {
        try {
            $this->migrationLog = [];
            $addedCount = 0;
            $skippedCount = 0;
            $errorCount = 0;

            // Get entity type ID for catalog_product
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'catalog_product')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                return [
                    'success' => false,
                    'message' => 'Could not find catalog_product entity type in Magento 2',
                    'added' => 0,
                    'skipped' => 0,
                    'errors' => 0,
                    'log' => []
                ];
            }

            // Get category_ids attribute ID
            $categoryIdsAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'category_ids')
                ->value('attribute_id');

            // Get all M2 products
            $m2Products = $this->getMagento2Products();
            
            // Get all products that are already in catalog_category_product table
            $productsInCategories = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_product')
                ->distinct()
                ->pluck('product_id')
                ->toArray();

            // Get all valid M2 category IDs
            $validCategoryIds = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'catalog_category_entity')
                ->pluck('entity_id')
                ->toArray();

            DB::connection($this->magento2Connection)->beginTransaction();

            foreach ($m2Products as $m2Product) {
                try {
                    $m2ProductId = $m2Product->entity_id;
                    $m2Sku = $m2Product->sku ?? 'N/A';

                    // Check if product is already in catalog_category_product table
                    if (in_array($m2ProductId, $productsInCategories)) {
                        $skippedCount++;
                        continue;
                    }

                    // Get category_ids from product attribute
                    $categoryIdsString = null;
                    
                    if ($categoryIdsAttributeId) {
                        // Try to get from varchar table first
                        $categoryIdsValue = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_product_entity_varchar')
                            ->where('entity_id', $m2ProductId)
                            ->where('attribute_id', $categoryIdsAttributeId)
                            ->where('store_id', 0)
                            ->value('value');

                        if ($categoryIdsValue) {
                            $categoryIdsString = $categoryIdsValue;
                        } else {
                            // Try text table
                            $categoryIdsValue = DB::connection($this->magento2Connection)
                                ->table($this->magento2Prefix . 'catalog_product_entity_text')
                                ->where('entity_id', $m2ProductId)
                                ->where('attribute_id', $categoryIdsAttributeId)
                                ->where('store_id', 0)
                                ->value('value');
                            
                            if ($categoryIdsValue) {
                                $categoryIdsString = $categoryIdsValue;
                            }
                        }
                    }

                    if (empty($categoryIdsString)) {
                        $skippedCount++;
                        $this->migrationLog[] = "SKIPPED: M2 Product ID {$m2ProductId} (SKU: {$m2Sku}) - no category_ids attribute found";
                        continue;
                    }

                    // Parse category IDs (comma-separated string)
                    $categoryIds = array_filter(
                        array_map('trim', explode(',', $categoryIdsString)),
                        function($id) use ($validCategoryIds) {
                            return !empty($id) && is_numeric($id) && in_array((int)$id, $validCategoryIds);
                        }
                    );

                    if (empty($categoryIds)) {
                        $skippedCount++;
                        $this->migrationLog[] = "SKIPPED: M2 Product ID {$m2ProductId} (SKU: {$m2Sku}) - no valid category IDs found in attribute";
                        continue;
                    }

                    // Ensure product is enabled and visible
                    $this->ensureProductIsEnabledAndVisible($m2ProductId);

                    // Add product to categories
                    $categoriesAdded = 0;
                    $invalidCategories = [];

                    foreach ($categoryIds as $categoryId) {
                        $categoryId = (int)$categoryId;

                        // Check if association already exists
                        $exists = DB::connection($this->magento2Connection)
                            ->table($this->magento2Prefix . 'catalog_category_product')
                            ->where('category_id', $categoryId)
                            ->where('product_id', $m2ProductId)
                            ->exists();

                        if (!$exists) {
                            DB::connection($this->magento2Connection)
                                ->table($this->magento2Prefix . 'catalog_category_product')
                                ->insert([
                                    'category_id' => $categoryId,
                                    'product_id' => $m2ProductId,
                                    'position' => 0, // Default position
                                ]);
                            $categoriesAdded++;
                        }
                    }

                    if ($categoriesAdded > 0) {
                        $addedCount++;
                        $invalidMsg = !empty($invalidCategories) ? " (invalid categories: " . implode(', ', $invalidCategories) . ")" : "";
                        $this->migrationLog[] = "ADDED: M2 Product ID {$m2ProductId} (SKU: {$m2Sku}) - added to {$categoriesAdded} category(ies){$invalidMsg}";
                    } else {
                        $skippedCount++;
                        $invalidMsg = !empty($invalidCategories) ? " (invalid categories: " . implode(', ', $invalidCategories) . ")" : "";
                        $this->migrationLog[] = "SKIPPED: M2 Product ID {$m2ProductId} (SKU: {$m2Sku}) - categories already exist or invalid{$invalidMsg}";
                    }

                } catch (Exception $e) {
                    $errorCount++;
                    $m2Sku = $m2Product->sku ?? 'N/A';
                    $this->migrationLog[] = "ERROR: Failed to fix categories for M2 Product ID {$m2ProductId} (SKU: {$m2Sku}): " . $e->getMessage();
                    Log::error("Error fixing category products for M2 Product ID {$m2ProductId}: " . $e->getMessage());
                }
            }

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => "Fixed category products. Added: {$addedCount}, Skipped: {$skippedCount}, Errors: {$errorCount}",
                'added' => $addedCount,
                'skipped' => $skippedCount,
                'errors' => $errorCount,
                'log' => $this->migrationLog
            ];

        } catch (Exception $e) {
            if (isset($this->magento2Connection)) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error('Error fixing category products: ' . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Failed to fix category products: ' . $e->getMessage(),
                'added' => 0,
                'skipped' => 0,
                'errors' => 0,
                'log' => []
            ];
        }
    }

    /**
     * Delete category data (attributes and entity)
     */
    protected function deleteCategoryData($categoryId, $connection, $prefix)
    {
        // Get entity type ID
        $entityTypeId = DB::connection($connection)
            ->table($prefix . 'eav_entity_type')
            ->where('entity_type_code', 'catalog_category')
            ->value('entity_type_id');

        if ($entityTypeId) {
            // Delete attribute values from all attribute tables
            $attributeTables = ['varchar', 'int', 'text', 'decimal', 'datetime'];
            foreach ($attributeTables as $tableType) {
                $table = $prefix . 'catalog_category_entity_' . $tableType;
                try {
                    DB::connection($connection)
                        ->table($table)
                        ->where('entity_id', $categoryId)
                        ->delete();
                } catch (Exception $e) {
                    // Table might not exist, continue
                    Log::warning("Table {$table} might not exist or has no data: " . $e->getMessage());
                }
            }

            // Delete category product associations
            try {
                DB::connection($connection)
                    ->table($prefix . 'catalog_category_product')
                    ->where('category_id', $categoryId)
                    ->delete();
            } catch (Exception $e) {
                Log::warning("Table {$prefix}catalog_category_product might not exist: " . $e->getMessage());
            }
        }

        // Delete the category entity
        DB::connection($connection)
            ->table($prefix . 'catalog_category_entity')
            ->where('entity_id', $categoryId)
            ->delete();
    }

    /**
     * Get all customers from Magento 1
     */
    public function getMagento1Customers()
    {
        try {
            // Get entity type ID for customer
            $entityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'customer')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                Log::warning('Magento 1 customer entity type not found');
                return collect([]);
            }

            Log::info("Magento 1 customer entity_type_id: {$entityTypeId}");

            // Get base customer data - email is stored directly in customer_entity table
            $customers = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'customer_entity')
                ->select('entity_id', 'email', 'website_id', 'group_id', 'created_at', 'updated_at')
                ->orderBy('entity_id')
                ->get();

            Log::info("Found " . $customers->count() . " customers in Magento 1 customer_entity table");

            // Get firstname and lastname attribute IDs (these are in EAV)
            $firstnameAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'firstname')
                ->value('attribute_id');

            $lastnameAttributeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'lastname')
                ->value('attribute_id');

            // Get firstname and lastname from EAV
            $firstnames = [];
            $lastnames = [];

            if ($firstnameAttributeId) {
                $firstnameValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'customer_entity_varchar')
                    ->where('attribute_id', $firstnameAttributeId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $firstnames = $firstnameValues;
            }

            if ($lastnameAttributeId) {
                $lastnameValues = DB::connection($this->magento1Connection)
                    ->table($this->magento1Prefix . 'customer_entity_varchar')
                    ->where('attribute_id', $lastnameAttributeId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $lastnames = $lastnameValues;
            }

            // Combine data - email is already in customer object from the query
            foreach ($customers as $customer) {
                // Email is already in customer object, just normalize it
                $customer->email = !empty($customer->email) ? trim($customer->email) : null;
                $customer->firstname = $firstnames[$customer->entity_id] ?? 'N/A';
                $customer->lastname = $lastnames[$customer->entity_id] ?? 'N/A';
            }

            Log::info("Returning " . $customers->count() . " Magento 1 customers");
            return $customers;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 1 customers: ' . $e->getMessage());
            Log::error('Stack trace: ' . $e->getTraceAsString());
            return collect([]);
        }
    }

    /**
     * Get all customers from Magento 2
     */
    public function getMagento2Customers()
    {
        try {
            // Get entity type ID for customer
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'customer')
                ->value('entity_type_id');

            if (!$entityTypeId) {
                Log::warning('Magento 2 customer entity type not found');
                return collect([]);
            }

            Log::info("Magento 2 customer entity_type_id: {$entityTypeId}");

            // Get base customer data - email is stored directly in customer_entity table
            $customers = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'customer_entity')
                ->select('entity_id', 'email', 'website_id', 'group_id', 'created_at', 'updated_at')
                ->orderBy('entity_id')
                ->get();

            Log::info("Found " . $customers->count() . " customers in Magento 2 customer_entity table");

            // Get firstname and lastname attribute IDs (these are in EAV)
            $firstnameAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'firstname')
                ->value('attribute_id');

            $lastnameAttributeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $entityTypeId)
                ->where('attribute_code', 'lastname')
                ->value('attribute_id');

            // Get firstname and lastname from EAV
            $firstnames = [];
            $lastnames = [];

            if ($firstnameAttributeId) {
                $firstnameValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'customer_entity_varchar')
                    ->where('attribute_id', $firstnameAttributeId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $firstnames = $firstnameValues;
            }

            if ($lastnameAttributeId) {
                $lastnameValues = DB::connection($this->magento2Connection)
                    ->table($this->magento2Prefix . 'customer_entity_varchar')
                    ->where('attribute_id', $lastnameAttributeId)
                    ->pluck('value', 'entity_id')
                    ->toArray();
                $lastnames = $lastnameValues;
            }

            // Combine data - email is already in customer object from the query
            foreach ($customers as $customer) {
                // Email is already in customer object, just normalize it
                $customer->email = !empty($customer->email) ? trim($customer->email) : null;
                $customer->firstname = $firstnames[$customer->entity_id] ?? 'N/A';
                $customer->lastname = $lastnames[$customer->entity_id] ?? 'N/A';
            }

            Log::info("Returning " . $customers->count() . " Magento 2 customers");
            return $customers;
        } catch (Exception $e) {
            Log::error('Error fetching Magento 2 customers: ' . $e->getMessage());
            Log::error('Stack trace: ' . $e->getTraceAsString());
            return collect([]);
        }
    }

    /**
     * Get Magento 1 customers that don't exist in Magento 2
     */
    public function getM1CustomersNotInM2()
    {
        try {
            $m1Customers = $this->getMagento1Customers();
            $m2Customers = $this->getMagento2Customers();

            Log::info("M1 Customers Not In M2: M1 count = " . $m1Customers->count() . ", M2 count = " . $m2Customers->count());

            // Get all M2 emails - create a set for faster lookup
            $m2EmailsSet = [];
            foreach ($m2Customers as $m2Customer) {
                $email = $m2Customer->email ?? null;
                if (!empty($email) && is_string($email)) {
                    $normalizedEmail = strtolower(trim($email));
                    if (!empty($normalizedEmail)) {
                        $m2EmailsSet[$normalizedEmail] = true;
                    }
                }
            }

            Log::info("M1 Customers Not In M2: M2 emails count = " . count($m2EmailsSet));

            // Get all M1 emails for comparison
            $m1EmailsWithCustomers = [];
            foreach ($m1Customers as $m1Customer) {
                $email = $m1Customer->email ?? null;
                if (!empty($email) && is_string($email)) {
                    $normalizedEmail = strtolower(trim($email));
                    if (!empty($normalizedEmail)) {
                        $m1EmailsWithCustomers[$normalizedEmail] = $m1Customer;
                    }
                }
            }

            Log::info("M1 Customers Not In M2: M1 emails count = " . count($m1EmailsWithCustomers));

            // Filter M1 customers that don't exist in M2
            $missingCustomers = collect();
            foreach ($m1EmailsWithCustomers as $normalizedEmail => $m1Customer) {
                if (!isset($m2EmailsSet[$normalizedEmail])) {
                    $missingCustomers->push($m1Customer);
                }
            }

            Log::info("M1 Customers Not In M2: Missing customers count = " . $missingCustomers->count());

            return $missingCustomers->values();
        } catch (Exception $e) {
            Log::error('Error fetching missing customers: ' . $e->getMessage());
            Log::error('Stack trace: ' . $e->getTraceAsString());
            return collect([]);
        }
    }

    /**
     * Get Magento 2 customers that don't exist in Magento 1
     */
    public function getM2CustomersNotInM1()
    {
        try {
            $m1Customers = $this->getMagento1Customers();
            $m2Customers = $this->getMagento2Customers();

            // Get all M1 emails - create a set for faster lookup
            $m1EmailsSet = [];
            foreach ($m1Customers as $m1Customer) {
                $email = $m1Customer->email ?? null;
                if (!empty($email) && is_string($email)) {
                    $normalizedEmail = strtolower(trim($email));
                    if (!empty($normalizedEmail)) {
                        $m1EmailsSet[$normalizedEmail] = true;
                    }
                }
            }

            // Filter M2 customers that don't exist in M1
            $missingCustomers = collect();
            foreach ($m2Customers as $m2Customer) {
                $email = $m2Customer->email ?? null;
                if (!empty($email) && is_string($email)) {
                    $normalizedEmail = strtolower(trim($email));
                    if (!empty($normalizedEmail) && !isset($m1EmailsSet[$normalizedEmail])) {
                        $missingCustomers->push($m2Customer);
                    }
                }
            }

            return $missingCustomers->values();
        } catch (Exception $e) {
            Log::error('Error fetching M2 customers not in M1: ' . $e->getMessage());
            Log::error('Stack trace: ' . $e->getTraceAsString());
            return collect([]);
        }
    }

    /**
     * Migrate all customers from Magento 1 to Magento 2
     */
    public function migrateCustomers($dryRun = false)
    {
        try {
            $this->migrationLog = [];
            $addedCount = 0;
            $updatedCount = 0;
            $errorCount = 0;

            // Get M1 and M2 entity type IDs
            $m1EntityTypeId = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'customer')
                ->value('entity_type_id');

            $m2EntityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'customer')
                ->value('entity_type_id');

            if (!$m1EntityTypeId || !$m2EntityTypeId) {
                return [
                    'success' => false,
                    'message' => 'Entity type not found',
                    'added' => 0,
                    'updated' => 0,
                    'errors' => 0,
                    'log' => []
                ];
            }

            // Get all M1 customers
            $m1Customers = $this->getMagento1Customers();

            // Get all customer attribute IDs from M1
            $m1AttributeIds = DB::connection($this->magento1Connection)
                ->table($this->magento1Prefix . 'eav_attribute')
                ->where('entity_type_id', $m1EntityTypeId)
                ->pluck('attribute_id', 'attribute_code')
                ->toArray();

            // Get all customer attribute IDs from M2
            $m2AttributeIds = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_attribute')
                ->where('entity_type_id', $m2EntityTypeId)
                ->pluck('attribute_id', 'attribute_code')
                ->toArray();

            if (!$dryRun) {
                DB::connection($this->magento2Connection)->beginTransaction();
            }

            foreach ($m1Customers as $m1Customer) {
                try {
                    $m1Email = !empty($m1Customer->email) ? strtolower(trim($m1Customer->email)) : null;
                    
                    if (empty($m1Email)) {
                        $this->migrationLog[] = "SKIPPED: Customer ID {$m1Customer->entity_id} - no email address";
                        continue;
                    }

                    // Check if customer exists in M2 by email (case-insensitive)
                    $m2Customer = DB::connection($this->magento2Connection)
                        ->table($this->magento2Prefix . 'customer_entity')
                        ->whereRaw('LOWER(TRIM(email)) = ?', [strtolower(trim($m1Email))])
                        ->first();

                    $m2CustomerId = null;
                    $isNew = false;

                    if ($m2Customer) {
                        // Customer exists, update
                        $m2CustomerId = $m2Customer->entity_id;
                        if (!$dryRun) {
                            $this->migrationLog[] = "Updating existing customer: {$m1Email} (ID: {$m2CustomerId})";
                        } else {
                            $this->migrationLog[] = "Would update existing customer: {$m1Email} (ID: {$m2CustomerId})";
                        }
                        $updatedCount++;
                    } else {
                        // Customer doesn't exist, create
                        if (!$dryRun) {
                            // Insert customer entity
                            $m2CustomerId = DB::connection($this->magento2Connection)
                                ->table($this->magento2Prefix . 'customer_entity')
                                ->insertGetId([
                                    'email' => $m1Email,
                                    'website_id' => $m1Customer->website_id ?? 1,
                                    'group_id' => $m1Customer->group_id ?? 1,
                                    'created_at' => $m1Customer->created_at ?? now(),
                                    'updated_at' => $m1Customer->updated_at ?? now(),
                                ]);
                            $this->migrationLog[] = "Added new customer: {$m1Email} (ID: {$m2CustomerId})";
                        } else {
                            $this->migrationLog[] = "Would add new customer: {$m1Email}";
                            $m2CustomerId = 0; // Placeholder for dry run
                        }
                        $addedCount++;
                        $isNew = true;
                    }

                    if (!$dryRun && $m2CustomerId) {
                        // Migrate customer attributes
                        $attributeTables = ['varchar', 'int', 'text', 'decimal', 'datetime'];
                        
                        foreach ($attributeTables as $tableType) {
                            $m1Table = $this->magento1Prefix . 'customer_entity_' . $tableType;
                            $m2Table = $this->magento2Prefix . 'customer_entity_' . $tableType;
                            
                            try {
                                // Get all attributes for this customer from M1
                                $m1Attributes = DB::connection($this->magento1Connection)
                                    ->table($m1Table)
                                    ->where('entity_id', $m1Customer->entity_id)
                                    ->get();

                                foreach ($m1Attributes as $m1Attr) {
                                    // Check if attribute exists in M2
                                    $attributeCode = array_search($m1Attr->attribute_id, $m1AttributeIds);
                                    if ($attributeCode && isset($m2AttributeIds[$attributeCode])) {
                                        $m2AttributeId = $m2AttributeIds[$attributeCode];
                                        
                                        // Check if attribute value already exists (customer attributes don't have store_id)
                                        $exists = DB::connection($this->magento2Connection)
                                            ->table($m2Table)
                                            ->where('entity_id', $m2CustomerId)
                                            ->where('attribute_id', $m2AttributeId)
                                            ->exists();

                                        if (!$exists) {
                                            // Customer attributes don't have store_id column
                                            $insertData = [
                                                'entity_id' => $m2CustomerId,
                                                'attribute_id' => $m2AttributeId,
                                                'value' => $m1Attr->value ?? null,
                                            ];
                                            DB::connection($this->magento2Connection)
                                                ->table($m2Table)
                                                ->insert($insertData);
                                        } else {
                                            // Update existing attribute
                                            DB::connection($this->magento2Connection)
                                                ->table($m2Table)
                                                ->where('entity_id', $m2CustomerId)
                                                ->where('attribute_id', $m2AttributeId)
                                                ->update(['value' => $m1Attr->value ?? null]);
                                        }
                                    }
                                }
                            } catch (Exception $e) {
                                // Table might not exist, continue
                                Log::warning("Table {$m1Table} or {$m2Table} might not exist: " . $e->getMessage());
                            }
                        }
                    }

                } catch (Exception $e) {
                    $errorCount++;
                    $m1Email = $m1Customer->email ?? 'N/A';
                    $this->migrationLog[] = "ERROR: Failed to migrate customer {$m1Email}: " . $e->getMessage();
                    Log::error("Error migrating customer {$m1Email}: " . $e->getMessage());
                }
            }

            if (!$dryRun) {
                DB::connection($this->magento2Connection)->commit();
            }

            return [
                'success' => true,
                'message' => $dryRun ? 'Dry run completed' : 'Customer migration completed',
                'added' => $addedCount,
                'updated' => $updatedCount,
                'errors' => $errorCount,
                'log' => $this->migrationLog
            ];

        } catch (Exception $e) {
            if (!$dryRun) {
                DB::connection($this->magento2Connection)->rollBack();
            }
            Log::error('Error migrating customers: ' . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Migration failed: ' . $e->getMessage(),
                'added' => 0,
                'updated' => 0,
                'errors' => 0,
                'log' => []
            ];
        }
    }

    /**
     * Delete a single customer from Magento 2
     */
    public function deleteM2Customer($customerId)
    {
        try {
            DB::connection($this->magento2Connection)->beginTransaction();

            // Get entity type ID
            $entityTypeId = DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'eav_entity_type')
                ->where('entity_type_code', 'customer')
                ->value('entity_type_id');

            if ($entityTypeId) {
                // Delete attribute values from all attribute tables
                $attributeTables = ['varchar', 'int', 'text', 'decimal', 'datetime'];
                foreach ($attributeTables as $tableType) {
                    $table = $this->magento2Prefix . 'customer_entity_' . $tableType;
                    try {
                        DB::connection($this->magento2Connection)
                            ->table($table)
                            ->where('entity_id', $customerId)
                            ->delete();
                    } catch (Exception $e) {
                        Log::warning("Table {$table} might not exist: " . $e->getMessage());
                    }
                }
            }

            // Delete the customer entity
            DB::connection($this->magento2Connection)
                ->table($this->magento2Prefix . 'customer_entity')
                ->where('entity_id', $customerId)
                ->delete();

            DB::connection($this->magento2Connection)->commit();

            return [
                'success' => true,
                'message' => 'Customer deleted successfully'
            ];

        } catch (Exception $e) {
            DB::connection($this->magento2Connection)->rollBack();
            Log::error("Error deleting customer {$customerId}: " . $e->getMessage());
            return [
                'success' => false,
                'message' => 'Failed to delete customer: ' . $e->getMessage()
            ];
        }
    }
}