class Product {
  final int? id;
  final int? userId;
  final int? categoryId;
  final int? uomId;
  final String? hsnCode;

  final String name;
  final String? sku;
  final String? barcode;
  final String? description;
  final double? purchasePrice;
  final double? sellingPrice;
  final double? minStock;
  final double? reorderLevel;
  final double? gstRate;
  final String? dimensions;
  final double? weight;
  final String? color;
  final String? size;
  final String priceCalcRule;
  final bool autoCalculatePrice;
  final double? purityFactor;
  final double? makingCharges;
  final String? makingChargesType;
  final double? wastagePercentage;
  final bool trackInventory;
  final bool isActive;
  final List<int> imageIds;
  final double? currentStock;

  Product({
    this.id,
    this.userId,
    this.categoryId,
    this.uomId,
    required this.name,
    this.hsnCode,
    this.sku,
    this.barcode,
    this.description,
    this.purchasePrice,
    this.sellingPrice,
    this.minStock,
    this.reorderLevel,
    this.gstRate,
    this.dimensions,
    this.weight,
    this.color,
    this.size,
    this.priceCalcRule = 'MANUAL',
    this.autoCalculatePrice = false,
    this.purityFactor = 1.0,
    this.makingCharges = 0.0,
    this.makingChargesType = 'FLAT',
    this.wastagePercentage = 0.0,
    this.trackInventory = true,
    this.isActive = true,
    this.imageIds = const [],
    this.currentStock = 0.0,
  });

  factory Product.fromJson(Map<String, dynamic> json) {
    return Product(
      id: json['id'],
      userId: json['userId'] ?? json['user_id'],
      categoryId: json['categoryId'] ?? json['category_id'],
      uomId: json['uomId'] ?? json['uom_id'],
      name: json['name'],
      hsnCode: json['hsnCode'] ?? json['hsn_code'],
      sku: json['sku'],
      barcode: json['barcode'],
      description: json['description'],
      purchasePrice: (json['purchasePrice'] ?? json['purchase_price'] as num?)?.toDouble(),
      sellingPrice: (json['sellingPrice'] ?? json['selling_price'] as num?)?.toDouble(),
      minStock: (json['minStock'] ?? json['min_stock'] as num?)?.toDouble(),
      reorderLevel: (json['reorderLevel'] ?? json['reorder_level'] as num?)?.toDouble(),
      gstRate: (json['gstRate'] ?? json['gst_rate'] as num?)?.toDouble(),
      dimensions: json['dimensions'],
      weight: (json['weight'] as num?)?.toDouble(),
      color: json['color'],
      size: json['size'],
      priceCalcRule: json['priceCalcRule'] ?? json['price_calc_rule'] ?? 'MANUAL',
      autoCalculatePrice: json['autoCalculatePrice'] ?? json['auto_calculate_price'] ?? false,
      purityFactor: (json['purityFactor'] ?? json['purity_factor'] as num?)?.toDouble() ?? 1.0,
      makingCharges: (json['makingCharges'] ?? json['making_charges'] as num?)?.toDouble() ?? 0.0,
      makingChargesType: json['makingChargesType'] ?? json['making_charges_type'] ?? 'FLAT',
      wastagePercentage: (json['wastagePercentage'] ?? json['wastage_percentage'] as num?)?.toDouble() ?? 0.0,
      trackInventory: json['trackInventory'] ?? json['track_inventory'] ?? true,
      isActive: json['isActive'] ?? json['is_active'] ?? true,
      imageIds: json['images'] != null 
          ? (json['images'] as List).map((i) => i['id'] as int).toList()
          : [],
      currentStock: (json['currentStock'] ?? json['current_stock'] as num?)?.toDouble() ?? 0.0,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'userId': userId,
      'categoryId': categoryId,
      'uomId': uomId,
      'name': name,
      'hsnCode': hsnCode,
      'sku': sku,
      'barcode': barcode,
      'description': description,
      'purchasePrice': purchasePrice,
      'sellingPrice': sellingPrice,
      'minStock': minStock,
      'reorderLevel': reorderLevel,
      'gstRate': gstRate,
      'dimensions': dimensions,
      'weight': weight,
      'color': color,
      'size': size,
      'priceCalcRule': priceCalcRule,
      'autoCalculatePrice': autoCalculatePrice,
      'purityFactor': purityFactor,
      'makingCharges': makingCharges,
      'makingChargesType': makingChargesType,
      'wastagePercentage': wastagePercentage,
      'trackInventory': trackInventory,
      'isActive': isActive,
    };
  }
}