update database

lib/features/products/data/models/category_model.dart

@@ -4,6 +4,7 @@
 library;
 
 import 'package:hive_ce/hive.dart';
+import 'package:worker/core/constants/storage_constants.dart';
 import 'package:worker/features/products/domain/entities/category.dart';
 
 part 'category_model.g.dart';
@@ -15,8 +16,8 @@ part 'category_model.g.dart';
 /// - Hive local database storage
 /// - Converting to/from domain entity
 ///
-/// Hive Type ID: 12
-@HiveType(typeId: 12)
+/// Hive Type ID: 27 (from HiveTypeIds.categoryModel)
+@HiveType(typeId: HiveTypeIds.categoryModel)
 class CategoryModel extends HiveObject {
   /// Unique identifier
   @HiveField(0)

lib/features/products/data/models/category_model.g.dart

@@ -8,7 +8,7 @@ part of 'category_model.dart';
 
 class CategoryModelAdapter extends TypeAdapter<CategoryModel> {
   @override
-  final typeId = 12;
+  final typeId = 27;
 
   @override
   CategoryModel read(BinaryReader reader) {

lib/features/products/data/models/product_model.dart

@@ -1,242 +1,294 @@
-/// Data Model: Product
-///
-/// Data Transfer Object for product information.
-/// Handles JSON and Hive serialization/deserialization.
-library;
+import 'dart:convert';
 
 import 'package:hive_ce/hive.dart';
+
+import 'package:worker/core/constants/storage_constants.dart';
 import 'package:worker/features/products/domain/entities/product.dart';
 
 part 'product_model.g.dart';
 
 /// Product Model
 ///
-/// Used for:
-/// - JSON serialization/deserialization
-/// - Hive local database storage
-/// - Converting to/from domain entity
+/// Hive CE model for caching product data locally.
+/// Maps to the 'products' table in the database.
 ///
-/// Hive Type ID: 1
-@HiveType(typeId: 1)
+/// Type ID: 2
+@HiveType(typeId: HiveTypeIds.productModel)
 class ProductModel extends HiveObject {
-  /// Unique identifier
+  ProductModel({
+    required this.productId,
+    required this.name,
+    this.description,
+    required this.basePrice,
+    this.images,
+    this.imageCaptions,
+    this.link360,
+    this.specifications,
+    this.category,
+    this.brand,
+    this.unit,
+    required this.isActive,
+    required this.isFeatured,
+    this.erpnextItemCode,
+    required this.createdAt,
+    this.updatedAt,
+  });
+
+  /// Product ID (Primary Key)
   @HiveField(0)
-  final String id;
+  final String productId;
 
   /// Product name
   @HiveField(1)
   final String name;
 
-  /// Product SKU
-  @HiveField(2)
-  final String sku;
-
   /// Product description
+  @HiveField(2)
+  final String? description;
+
+  /// Base price
   @HiveField(3)
-  final String description;
+  final double basePrice;
 
-  /// Price per unit (VND)
+  /// Product images (JSON encoded list of URLs)
   @HiveField(4)
-  final double price;
+  final String? images;
 
-  /// Unit of measurement
+  /// Image captions (JSON encoded map of image_url -> caption)
   @HiveField(5)
-  final String unit;
+  final String? imageCaptions;
 
-  /// Product image URL
+  /// 360-degree view link
   @HiveField(6)
-  final String imageUrl;
+  final String? link360;
 
-  /// Category ID
+  /// Product specifications (JSON encoded)
+  /// Contains: size, material, color, finish, etc.
   @HiveField(7)
-  final String categoryId;
+  final String? specifications;
 
-  /// Stock availability
+  /// Product category
   @HiveField(8)
-  final bool inStock;
+  final String? category;
 
-  /// Stock quantity
+  /// Product brand
   @HiveField(9)
-  final int stockQuantity;
-
-  /// Created date (ISO8601 string)
-  @HiveField(10)
-  final String createdAt;
-
-  /// Sale price (optional)
-  @HiveField(11)
-  final double? salePrice;
-
-  /// Brand name (optional)
-  @HiveField(12)
   final String? brand;
 
-  ProductModel({
-    required this.id,
-    required this.name,
-    required this.sku,
-    required this.description,
-    required this.price,
-    required this.unit,
-    required this.imageUrl,
-    required this.categoryId,
-    required this.inStock,
-    required this.stockQuantity,
-    required this.createdAt,
-    this.salePrice,
-    this.brand,
-  });
+  /// Unit of measurement (m2, box, piece, etc.)
+  @HiveField(10)
+  final String? unit;
 
-  /// From JSON constructor
+  /// Whether product is active
+  @HiveField(11)
+  final bool isActive;
+
+  /// Whether product is featured
+  @HiveField(12)
+  final bool isFeatured;
+
+  /// ERPNext item code for integration
+  @HiveField(13)
+  final String? erpnextItemCode;
+
+  /// Product creation timestamp
+  @HiveField(14)
+  final DateTime createdAt;
+
+  /// Last update timestamp
+  @HiveField(15)
+  final DateTime? updatedAt;
+
+  // =========================================================================
+  // JSON SERIALIZATION
+  // =========================================================================
+
+  /// Create ProductModel from JSON
   factory ProductModel.fromJson(Map<String, dynamic> json) {
     return ProductModel(
-      id: json['id'] as String,
+      productId: json['product_id'] as String,
       name: json['name'] as String,
-      sku: json['sku'] as String,
-      description: json['description'] as String,
-      price: (json['price'] as num).toDouble(),
-      unit: json['unit'] as String,
-      imageUrl: json['imageUrl'] as String,
-      categoryId: json['categoryId'] as String,
-      inStock: json['inStock'] as bool,
-      stockQuantity: json['stockQuantity'] as int,
-      createdAt: json['createdAt'] as String,
-      salePrice: json['salePrice'] != null ? (json['salePrice'] as num).toDouble() : null,
+      description: json['description'] as String?,
+      basePrice: (json['base_price'] as num).toDouble(),
+      images: json['images'] != null ? jsonEncode(json['images']) : null,
+      imageCaptions: json['image_captions'] != null
+          ? jsonEncode(json['image_captions'])
+          : null,
+      link360: json['link_360'] as String?,
+      specifications: json['specifications'] != null
+          ? jsonEncode(json['specifications'])
+          : null,
+      category: json['category'] as String?,
       brand: json['brand'] as String?,
+      unit: json['unit'] as String?,
+      isActive: json['is_active'] as bool? ?? true,
+      isFeatured: json['is_featured'] as bool? ?? false,
+      erpnextItemCode: json['erpnext_item_code'] as String?,
+      createdAt: DateTime.parse(json['created_at'] as String),
+      updatedAt: json['updated_at'] != null
+          ? DateTime.parse(json['updated_at'] as String)
+          : null,
     );
   }
 
-  /// To JSON method
+  /// Convert ProductModel to JSON
   Map<String, dynamic> toJson() {
     return {
-      'id': id,
+      'product_id': productId,
       'name': name,
-      'sku': sku,
       'description': description,
-      'price': price,
-      'unit': unit,
-      'imageUrl': imageUrl,
-      'categoryId': categoryId,
-      'inStock': inStock,
-      'stockQuantity': stockQuantity,
-      'createdAt': createdAt,
-      'salePrice': salePrice,
+      'base_price': basePrice,
+      'images': images != null ? jsonDecode(images!) : null,
+      'image_captions':
+          imageCaptions != null ? jsonDecode(imageCaptions!) : null,
+      'link_360': link360,
+      'specifications':
+          specifications != null ? jsonDecode(specifications!) : null,
+      'category': category,
       'brand': brand,
+      'unit': unit,
+      'is_active': isActive,
+      'is_featured': isFeatured,
+      'erpnext_item_code': erpnextItemCode,
+      'created_at': createdAt.toIso8601String(),
+      'updated_at': updatedAt?.toIso8601String(),
     };
   }
 
-  /// Convert to domain entity
-  Product toEntity() {
-    return Product(
-      id: id,
-      name: name,
-      sku: sku,
-      description: description,
-      price: price,
-      unit: unit,
-      imageUrl: imageUrl,
-      categoryId: categoryId,
-      inStock: inStock,
-      stockQuantity: stockQuantity,
-      createdAt: DateTime.parse(createdAt),
-      salePrice: salePrice,
-      brand: brand,
-    );
+  // =========================================================================
+  // HELPER METHODS
+  // =========================================================================
+
+  /// Get images as List
+  List<String>? get imagesList {
+    if (images == null) return null;
+    try {
+      final decoded = jsonDecode(images!) as List;
+      return decoded.map((e) => e.toString()).toList();
+    } catch (e) {
+      return null;
+    }
   }
 
-  /// Create from domain entity
-  factory ProductModel.fromEntity(Product entity) {
-    return ProductModel(
-      id: entity.id,
-      name: entity.name,
-      sku: entity.sku,
-      description: entity.description,
-      price: entity.price,
-      unit: entity.unit,
-      imageUrl: entity.imageUrl,
-      categoryId: entity.categoryId,
-      inStock: entity.inStock,
-      stockQuantity: entity.stockQuantity,
-      createdAt: entity.createdAt.toIso8601String(),
-      salePrice: entity.salePrice,
-      brand: entity.brand,
-    );
+  /// Get first image or placeholder
+  String get primaryImage {
+    final imgs = imagesList;
+    if (imgs != null && imgs.isNotEmpty) {
+      return imgs.first;
+    }
+    return ''; // Return empty string, UI should handle placeholder
   }
 
-  /// Copy with method
+  /// Get image captions as Map
+  Map<String, String>? get imageCaptionsMap {
+    if (imageCaptions == null) return null;
+    try {
+      final decoded = jsonDecode(imageCaptions!) as Map<String, dynamic>;
+      return decoded.map((key, value) => MapEntry(key, value.toString()));
+    } catch (e) {
+      return null;
+    }
+  }
+
+  /// Get specifications as Map
+  Map<String, dynamic>? get specificationsMap {
+    if (specifications == null) return null;
+    try {
+      return jsonDecode(specifications!) as Map<String, dynamic>;
+    } catch (e) {
+      return null;
+    }
+  }
+
+  /// Get formatted price with currency
+  String get formattedPrice {
+    return '${basePrice.toStringAsFixed(0)}đ';
+  }
+
+  /// Check if product has 360 view
+  bool get has360View => link360 != null && link360!.isNotEmpty;
+
+  // =========================================================================
+  // COPY WITH
+  // =========================================================================
+
+  /// Create a copy with updated fields
   ProductModel copyWith({
-    String? id,
+    String? productId,
     String? name,
-    String? sku,
     String? description,
-    double? price,
-    String? unit,
-    String? imageUrl,
-    String? categoryId,
-    bool? inStock,
-    int? stockQuantity,
-    String? createdAt,
-    double? salePrice,
+    double? basePrice,
+    String? images,
+    String? imageCaptions,
+    String? link360,
+    String? specifications,
+    String? category,
     String? brand,
+    String? unit,
+    bool? isActive,
+    bool? isFeatured,
+    String? erpnextItemCode,
+    DateTime? createdAt,
+    DateTime? updatedAt,
   }) {
     return ProductModel(
-      id: id ?? this.id,
+      productId: productId ?? this.productId,
       name: name ?? this.name,
-      sku: sku ?? this.sku,
       description: description ?? this.description,
-      price: price ?? this.price,
-      unit: unit ?? this.unit,
-      imageUrl: imageUrl ?? this.imageUrl,
-      categoryId: categoryId ?? this.categoryId,
-      inStock: inStock ?? this.inStock,
-      stockQuantity: stockQuantity ?? this.stockQuantity,
-      createdAt: createdAt ?? this.createdAt,
-      salePrice: salePrice ?? this.salePrice,
+      basePrice: basePrice ?? this.basePrice,
+      images: images ?? this.images,
+      imageCaptions: imageCaptions ?? this.imageCaptions,
+      link360: link360 ?? this.link360,
+      specifications: specifications ?? this.specifications,
+      category: category ?? this.category,
       brand: brand ?? this.brand,
+      unit: unit ?? this.unit,
+      isActive: isActive ?? this.isActive,
+      isFeatured: isFeatured ?? this.isFeatured,
+      erpnextItemCode: erpnextItemCode ?? this.erpnextItemCode,
+      createdAt: createdAt ?? this.createdAt,
+      updatedAt: updatedAt ?? this.updatedAt,
     );
   }
 
   @override
   String toString() {
-    return 'ProductModel(id: $id, name: $name, sku: $sku, price: $price, unit: $unit)';
+    return 'ProductModel(productId: $productId, name: $name, price: $basePrice)';
   }
 
   @override
   bool operator ==(Object other) {
     if (identical(this, other)) return true;
 
-    return other is ProductModel &&
-        other.id == id &&
-        other.name == name &&
-        other.sku == sku &&
-        other.description == description &&
-        other.price == price &&
-        other.unit == unit &&
-        other.imageUrl == imageUrl &&
-        other.categoryId == categoryId &&
-        other.inStock == inStock &&
-        other.stockQuantity == stockQuantity &&
-        other.createdAt == createdAt &&
-        other.salePrice == salePrice &&
-        other.brand == brand;
+    return other is ProductModel && other.productId == productId;
   }
 
   @override
-  int get hashCode {
-    return Object.hash(
-      id,
-      name,
-      sku,
-      description,
-      price,
-      unit,
-      imageUrl,
-      categoryId,
-      inStock,
-      stockQuantity,
-      createdAt,
-      salePrice,
-      brand,
+  int get hashCode => productId.hashCode;
+
+  // =========================================================================
+  // ENTITY CONVERSION
+  // =========================================================================
+
+  /// Convert ProductModel to Product entity
+  Product toEntity() {
+    return Product(
+      productId: productId,
+      name: name,
+      description: description,
+      basePrice: basePrice,
+      images: imagesList ?? [],
+      imageCaptions: imageCaptionsMap ?? {},
+      link360: link360,
+      specifications: specificationsMap ?? {},
+      category: category,
+      brand: brand,
+      unit: unit,
+      isActive: isActive,
+      isFeatured: isFeatured,
+      erpnextItemCode: erpnextItemCode,
+      createdAt: createdAt,
+      updatedAt: updatedAt ?? createdAt,
     );
   }
 }

lib/features/products/data/models/product_model.g.dart

@@ -8,7 +8,7 @@ part of 'product_model.dart';
 
 class ProductModelAdapter extends TypeAdapter<ProductModel> {
   @override
-  final typeId = 1;
+  final typeId = 2;
 
   @override
   ProductModel read(BinaryReader reader) {
@@ -17,52 +17,61 @@ class ProductModelAdapter extends TypeAdapter<ProductModel> {
       for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
     };
     return ProductModel(
-      id: fields[0] as String,
+      productId: fields[0] as String,
       name: fields[1] as String,
-      sku: fields[2] as String,
-      description: fields[3] as String,
-      price: (fields[4] as num).toDouble(),
-      unit: fields[5] as String,
-      imageUrl: fields[6] as String,
-      categoryId: fields[7] as String,
-      inStock: fields[8] as bool,
-      stockQuantity: (fields[9] as num).toInt(),
-      createdAt: fields[10] as String,
-      salePrice: (fields[11] as num?)?.toDouble(),
-      brand: fields[12] as String?,
+      description: fields[2] as String?,
+      basePrice: (fields[3] as num).toDouble(),
+      images: fields[4] as String?,
+      imageCaptions: fields[5] as String?,
+      link360: fields[6] as String?,
+      specifications: fields[7] as String?,
+      category: fields[8] as String?,
+      brand: fields[9] as String?,
+      unit: fields[10] as String?,
+      isActive: fields[11] as bool,
+      isFeatured: fields[12] as bool,
+      erpnextItemCode: fields[13] as String?,
+      createdAt: fields[14] as DateTime,
+      updatedAt: fields[15] as DateTime?,
     );
   }
 
   @override
   void write(BinaryWriter writer, ProductModel obj) {
     writer
-      ..writeByte(13)
+      ..writeByte(16)
       ..writeByte(0)
-      ..write(obj.id)
+      ..write(obj.productId)
       ..writeByte(1)
       ..write(obj.name)
       ..writeByte(2)
-      ..write(obj.sku)
-      ..writeByte(3)
       ..write(obj.description)
+      ..writeByte(3)
+      ..write(obj.basePrice)
       ..writeByte(4)
-      ..write(obj.price)
+      ..write(obj.images)
       ..writeByte(5)
-      ..write(obj.unit)
+      ..write(obj.imageCaptions)
       ..writeByte(6)
-      ..write(obj.imageUrl)
+      ..write(obj.link360)
       ..writeByte(7)
-      ..write(obj.categoryId)
+      ..write(obj.specifications)
       ..writeByte(8)
-      ..write(obj.inStock)
+      ..write(obj.category)
       ..writeByte(9)
-      ..write(obj.stockQuantity)
+      ..write(obj.brand)
       ..writeByte(10)
-      ..write(obj.createdAt)
+      ..write(obj.unit)
       ..writeByte(11)
-      ..write(obj.salePrice)
+      ..write(obj.isActive)
       ..writeByte(12)
-      ..write(obj.brand);
+      ..write(obj.isFeatured)
+      ..writeByte(13)
+      ..write(obj.erpnextItemCode)
+      ..writeByte(14)
+      ..write(obj.createdAt)
+      ..writeByte(15)
+      ..write(obj.updatedAt);
   }
 
   @override

lib/features/products/data/models/stock_level_model.dart

@@ -0,0 +1,84 @@
+import 'package:hive_ce/hive.dart';
+
+import 'package:worker/core/constants/storage_constants.dart';
+
+part 'stock_level_model.g.dart';
+
+/// Stock Level Model
+///
+/// Hive CE model for caching stock level data locally.
+/// Maps to the 'stock_levels' table in the database.
+///
+/// Type ID: 3
+@HiveType(typeId: HiveTypeIds.stockLevelModel)
+class StockLevelModel extends HiveObject {
+  StockLevelModel({
+    required this.productId,
+    required this.availableQty,
+    required this.reservedQty,
+    required this.orderedQty,
+    required this.warehouseCode,
+    required this.lastUpdated,
+  });
+
+  @HiveField(0)
+  final String productId;
+
+  @HiveField(1)
+  final double availableQty;
+
+  @HiveField(2)
+  final double reservedQty;
+
+  @HiveField(3)
+  final double orderedQty;
+
+  @HiveField(4)
+  final String warehouseCode;
+
+  @HiveField(5)
+  final DateTime lastUpdated;
+
+  factory StockLevelModel.fromJson(Map<String, dynamic> json) {
+    return StockLevelModel(
+      productId: json['product_id'] as String,
+      availableQty: (json['available_qty'] as num).toDouble(),
+      reservedQty: (json['reserved_qty'] as num).toDouble(),
+      orderedQty: (json['ordered_qty'] as num).toDouble(),
+      warehouseCode: json['warehouse_code'] as String,
+      lastUpdated: DateTime.parse(json['last_updated'] as String),
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'product_id': productId,
+      'available_qty': availableQty,
+      'reserved_qty': reservedQty,
+      'ordered_qty': orderedQty,
+      'warehouse_code': warehouseCode,
+      'last_updated': lastUpdated.toIso8601String(),
+    };
+  }
+
+  double get totalQty => availableQty + reservedQty + orderedQty;
+  bool get inStock => availableQty > 0;
+
+  StockLevelModel copyWith({
+    String? productId,
+    double? availableQty,
+    double? reservedQty,
+    double? orderedQty,
+    String? warehouseCode,
+    DateTime? lastUpdated,
+  }) {
+    return StockLevelModel(
+      productId: productId ?? this.productId,
+      availableQty: availableQty ?? this.availableQty,
+      reservedQty: reservedQty ?? this.reservedQty,
+      orderedQty: orderedQty ?? this.orderedQty,
+      warehouseCode: warehouseCode ?? this.warehouseCode,
+      lastUpdated: lastUpdated ?? this.lastUpdated,
+    );
+  }
+}

lib/features/products/data/models/stock_level_model.g.dart

@@ -0,0 +1,56 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'stock_level_model.dart';
+
+// **************************************************************************
+// TypeAdapterGenerator
+// **************************************************************************
+
+class StockLevelModelAdapter extends TypeAdapter<StockLevelModel> {
+  @override
+  final typeId = 3;
+
+  @override
+  StockLevelModel read(BinaryReader reader) {
+    final numOfFields = reader.readByte();
+    final fields = <int, dynamic>{
+      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
+    };
+    return StockLevelModel(
+      productId: fields[0] as String,
+      availableQty: (fields[1] as num).toDouble(),
+      reservedQty: (fields[2] as num).toDouble(),
+      orderedQty: (fields[3] as num).toDouble(),
+      warehouseCode: fields[4] as String,
+      lastUpdated: fields[5] as DateTime,
+    );
+  }
+
+  @override
+  void write(BinaryWriter writer, StockLevelModel obj) {
+    writer
+      ..writeByte(6)
+      ..writeByte(0)
+      ..write(obj.productId)
+      ..writeByte(1)
+      ..write(obj.availableQty)
+      ..writeByte(2)
+      ..write(obj.reservedQty)
+      ..writeByte(3)
+      ..write(obj.orderedQty)
+      ..writeByte(4)
+      ..write(obj.warehouseCode)
+      ..writeByte(5)
+      ..write(obj.lastUpdated);
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is StockLevelModelAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}

lib/features/products/domain/entities/product.dart

@@ -10,111 +10,155 @@ library;
 /// Used across all layers but originates in the domain layer.
 class Product {
   /// Unique identifier
-  final String id;
+  final String productId;
 
   /// Product name (Vietnamese)
   final String name;
 
-  /// Product SKU (Stock Keeping Unit)
-  final String sku;
-
   /// Product description
-  final String description;
+  final String? description;
 
-  /// Price per unit (VND)
-  final double price;
+  /// Base price per unit (VND)
+  final double basePrice;
+
+  /// Product images (URLs)
+  final List<String> images;
+
+  /// Image captions
+  final Map<String, String> imageCaptions;
+
+  /// 360-degree view link
+  final String? link360;
+
+  /// Product specifications
+  final Map<String, dynamic> specifications;
+
+  /// Category name
+  final String? category;
+
+  /// Brand name
+  final String? brand;
 
   /// Unit of measurement (e.g., "m²", "viên", "hộp")
-  final String unit;
+  final String? unit;
 
-  /// Product image URL
-  final String imageUrl;
+  /// Product is active
+  final bool isActive;
 
-  /// Category ID
-  final String categoryId;
+  /// Product is featured
+  final bool isFeatured;
 
-  /// Stock availability
-  final bool inStock;
-
-  /// Stock quantity
-  final int stockQuantity;
+  /// ERPNext item code
+  final String? erpnextItemCode;
 
   /// Created date
   final DateTime createdAt;
 
-  /// Optional sale price
-  final double? salePrice;
-
-  /// Optional brand name
-  final String? brand;
+  /// Last updated date
+  final DateTime updatedAt;
 
   const Product({
-    required this.id,
+    required this.productId,
     required this.name,
-    required this.sku,
-    required this.description,
-    required this.price,
-    required this.unit,
-    required this.imageUrl,
-    required this.categoryId,
-    required this.inStock,
-    required this.stockQuantity,
-    required this.createdAt,
-    this.salePrice,
+    this.description,
+    required this.basePrice,
+    required this.images,
+    required this.imageCaptions,
+    this.link360,
+    required this.specifications,
+    this.category,
     this.brand,
+    this.unit,
+    required this.isActive,
+    required this.isFeatured,
+    this.erpnextItemCode,
+    required this.createdAt,
+    required this.updatedAt,
   });
 
-  /// Get effective price (sale price if available, otherwise regular price)
-  double get effectivePrice => salePrice ?? price;
+  /// Get primary image URL
+  String? get primaryImage => images.isNotEmpty ? images.first : null;
+
+  /// Alias for primaryImage (used by UI widgets)
+  String get imageUrl => primaryImage ?? '';
+
+  /// Category ID (alias for category field)
+  String? get categoryId => category;
+
+  /// Check if product has 360 view
+  bool get has360View => link360 != null && link360!.isNotEmpty;
+
+  /// Check if product has multiple images
+  bool get hasMultipleImages => images.length > 1;
 
   /// Check if product is on sale
-  bool get isOnSale => salePrice != null && salePrice! < price;
+  /// TODO: Implement sale price logic when backend supports it
+  bool get isOnSale => false;
 
-  /// Get discount percentage
-  int get discountPercentage {
-    if (!isOnSale) return 0;
-    return (((price - salePrice!) / price) * 100).round();
+  /// Discount percentage
+  /// TODO: Calculate from salePrice when backend supports it
+  int get discountPercentage => 0;
+
+  /// Effective price (considering sales)
+  /// TODO: Use salePrice when backend supports it
+  double get effectivePrice => basePrice;
+
+  /// Check if product is low stock
+  /// TODO: Implement stock tracking when backend supports it
+  bool get isLowStock => false;
+
+  /// Check if product is in stock
+  /// Currently using isActive as proxy
+  bool get inStock => isActive;
+
+  /// Get specification value by key
+  String? getSpecification(String key) {
+    return specifications[key]?.toString();
   }
 
-  /// Check if stock is low (less than 10 items)
-  bool get isLowStock => inStock && stockQuantity < 10;
-
   /// Copy with method for creating modified copies
   Product copyWith({
-    String? id,
+    String? productId,
     String? name,
-    String? sku,
     String? description,
-    double? price,
-    String? unit,
-    String? imageUrl,
-    String? categoryId,
-    bool? inStock,
-    int? stockQuantity,
-    DateTime? createdAt,
-    double? salePrice,
+    double? basePrice,
+    List<String>? images,
+    Map<String, String>? imageCaptions,
+    String? link360,
+    Map<String, dynamic>? specifications,
+    String? category,
     String? brand,
+    String? unit,
+    bool? isActive,
+    bool? isFeatured,
+    String? erpnextItemCode,
+    DateTime? createdAt,
+    DateTime? updatedAt,
   }) {
     return Product(
-      id: id ?? this.id,
+      productId: productId ?? this.productId,
       name: name ?? this.name,
-      sku: sku ?? this.sku,
       description: description ?? this.description,
-      price: price ?? this.price,
-      unit: unit ?? this.unit,
-      imageUrl: imageUrl ?? this.imageUrl,
-      categoryId: categoryId ?? this.categoryId,
-      inStock: inStock ?? this.inStock,
-      stockQuantity: stockQuantity ?? this.stockQuantity,
-      createdAt: createdAt ?? this.createdAt,
-      salePrice: salePrice ?? this.salePrice,
+      basePrice: basePrice ?? this.basePrice,
+      images: images ?? this.images,
+      imageCaptions: imageCaptions ?? this.imageCaptions,
+      link360: link360 ?? this.link360,
+      specifications: specifications ?? this.specifications,
+      category: category ?? this.category,
       brand: brand ?? this.brand,
+      unit: unit ?? this.unit,
+      isActive: isActive ?? this.isActive,
+      isFeatured: isFeatured ?? this.isFeatured,
+      erpnextItemCode: erpnextItemCode ?? this.erpnextItemCode,
+      createdAt: createdAt ?? this.createdAt,
+      updatedAt: updatedAt ?? this.updatedAt,
     );
   }
 
   @override
   String toString() {
-    return 'Product(id: $id, name: $name, sku: $sku, price: $price, unit: $unit, inStock: $inStock)';
+    return 'Product(productId: $productId, name: $name, basePrice: $basePrice, '
+        'category: $category, isActive: $isActive, isFeatured: $isFeatured)';
   }
 
   @override
@@ -122,35 +166,31 @@ class Product {
     if (identical(this, other)) return true;
 
     return other is Product &&
-        other.id == id &&
+        other.productId == productId &&
         other.name == name &&
-        other.sku == sku &&
         other.description == description &&
-        other.price == price &&
+        other.basePrice == basePrice &&
+        other.category == category &&
+        other.brand == brand &&
         other.unit == unit &&
-        other.imageUrl == imageUrl &&
-        other.categoryId == categoryId &&
-        other.inStock == inStock &&
-        other.stockQuantity == stockQuantity &&
-        other.salePrice == salePrice &&
-        other.brand == brand;
+        other.isActive == isActive &&
+        other.isFeatured == isFeatured &&
+        other.erpnextItemCode == erpnextItemCode;
   }
 
   @override
   int get hashCode {
     return Object.hash(
-      id,
+      productId,
       name,
-      sku,
       description,
-      price,
-      unit,
-      imageUrl,
-      categoryId,
-      inStock,
-      stockQuantity,
-      salePrice,
+      basePrice,
+      category,
       brand,
+      unit,
+      isActive,
+      isFeatured,
+      erpnextItemCode,
     );
   }
 }

lib/features/products/domain/entities/stock_level.dart

@@ -0,0 +1,106 @@
+/// Domain Entity: Stock Level
+///
+/// Represents inventory stock level for a product in a warehouse.
+library;
+
+/// Stock Level Entity
+///
+/// Contains inventory information for a product:
+/// - Available quantity
+/// - Reserved quantity (for pending orders)
+/// - Ordered quantity (incoming stock)
+/// - Warehouse location
+class StockLevel {
+  /// Product ID
+  final String productId;
+
+  /// Available quantity for sale
+  final double availableQty;
+
+  /// Quantity reserved for orders
+  final double reservedQty;
+
+  /// Quantity on order (incoming)
+  final double orderedQty;
+
+  /// Warehouse code
+  final String warehouseCode;
+
+  /// Last update timestamp
+  final DateTime lastUpdated;
+
+  const StockLevel({
+    required this.productId,
+    required this.availableQty,
+    required this.reservedQty,
+    required this.orderedQty,
+    required this.warehouseCode,
+    required this.lastUpdated,
+  });
+
+  /// Get total quantity (available + reserved + ordered)
+  double get totalQty => availableQty + reservedQty + orderedQty;
+
+  /// Check if product is in stock
+  bool get isInStock => availableQty > 0;
+
+  /// Check if stock is low (less than 10 units)
+  bool get isLowStock => availableQty > 0 && availableQty < 10;
+
+  /// Check if out of stock
+  bool get isOutOfStock => availableQty <= 0;
+
+  /// Get available percentage
+  double get availablePercentage {
+    if (totalQty == 0) return 0;
+    return (availableQty / totalQty) * 100;
+  }
+
+  /// Copy with method for immutability
+  StockLevel copyWith({
+    String? productId,
+    double? availableQty,
+    double? reservedQty,
+    double? orderedQty,
+    String? warehouseCode,
+    DateTime? lastUpdated,
+  }) {
+    return StockLevel(
+      productId: productId ?? this.productId,
+      availableQty: availableQty ?? this.availableQty,
+      reservedQty: reservedQty ?? this.reservedQty,
+      orderedQty: orderedQty ?? this.orderedQty,
+      warehouseCode: warehouseCode ?? this.warehouseCode,
+      lastUpdated: lastUpdated ?? this.lastUpdated,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+
+    return other is StockLevel &&
+        other.productId == productId &&
+        other.availableQty == availableQty &&
+        other.reservedQty == reservedQty &&
+        other.orderedQty == orderedQty &&
+        other.warehouseCode == warehouseCode;
+  }
+
+  @override
+  int get hashCode {
+    return Object.hash(
+      productId,
+      availableQty,
+      reservedQty,
+      orderedQty,
+      warehouseCode,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'StockLevel(productId: $productId, availableQty: $availableQty, '
+        'reservedQty: $reservedQty, orderedQty: $orderedQty, warehouseCode: $warehouseCode)';
+  }
+}

lib/features/products/presentation/pages/products_page.dart

@@ -5,6 +5,7 @@ library;
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
 import 'package:worker/core/constants/ui_constants.dart';
 import 'package:worker/core/theme/colors.dart';
 import 'package:worker/features/products/presentation/providers/categories_provider.dart';
@@ -34,6 +35,10 @@ class ProductsPage extends ConsumerWidget {
     return Scaffold(
       backgroundColor: AppColors.white,
       appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back, color: Colors.black),
+          onPressed: () => context.pop(),
+        ),
         title: const Text('Sản phẩm', style: TextStyle(color: Colors.black)),
         elevation: AppBarSpecs.elevation,
         backgroundColor: AppColors.white,