tm-android-app/lib/models/product_model.dart

class ProductResponse {
  final bool success;
  final int totalData;
  final int totalPages;
  final List<Product> products;

  ProductResponse({
    required this.success,
    required this.totalData,
    required this.totalPages,
    required this.products,
  });

  factory ProductResponse.fromJson(Map<String, dynamic> json) {
    return ProductResponse(
      success: json['success'],
      totalData: json['total_data'],
      totalPages: json['total_pages'],
      products: (json['products'] as List)
          .map((item) => Product.fromJson(item))
          .toList(),
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'success': success,
      'total_data': totalData,
      'total_pages': totalPages,
      'products': products.map((item) => item.toJson()).toList(),
    };
  }
}

class Product {
  final String id;
  // ignore: non_constant_identifier_names
  final String SKU;
  final String name;
  final Category category;
  final Brand brand;
  final double price;
  // ignore: non_constant_identifier_names
  final int GST;
  // ignore: non_constant_identifier_names
  final int HSNCode;
  final String description;
  final String productStatus;
  final AddedBy addedBy;
  final List<dynamic> image;
  final DateTime createdAt;
  final DateTime updatedAt;
  final int v;
  int? sale;
  int? inventory;

  Product({
    required this.id,
    // ignore: non_constant_identifier_names
    required this.SKU,
    required this.name,
    required this.category,
    required this.brand,
    required this.price,
    // ignore: non_constant_identifier_names
    required this.GST,
    // ignore: non_constant_identifier_names
    required this.HSNCode,
    required this.description,
    required this.productStatus,
    required this.addedBy,
    required this.image,
    required this.createdAt,
    required this.updatedAt,
    required this.v,
    this.sale,
    this.inventory,
  });

  factory Product.fromJson(Map<String, dynamic> json) {
    return Product(
      id: json['_id'],
      SKU: json['SKU'],
      name: json['name'],
      category: Category.fromJson(json['category']),
      brand: Brand.fromJson(json['brand']),
      price: (json['price'] as num).toDouble(),
      GST: json['GST'],
      HSNCode: json['HSN_Code'],
      description: json['description'] ?? '',
      productStatus: json['product_Status'],
      addedBy: AddedBy.fromJson(json['addedBy']),
      image: json['image'] as List<dynamic>,
      createdAt: DateTime.parse(json['createdAt']),
      updatedAt: DateTime.parse(json['updatedAt']),
      v: json['__v'],
      sale: json['sale'], // Nullable field
      inventory: json['inventory'], // Nullable field
    );
  }

  Map<String, dynamic> toJson() {
    return {
      '_id': id,
      'SKU': SKU,
      'name': name,
      'category': category.toJson(),
      'brand': brand.toJson(),
      'price': price,
      'GST': GST,
      'HSN_Code': HSNCode,
      'description': description,
      'product_Status': productStatus,
      'addedBy': addedBy.toJson(),
      'image': image,
      'createdAt': createdAt.toIso8601String(),
      'updatedAt': updatedAt.toIso8601String(),
      '__v': v,
      'sale': sale, // Nullable field
      'inventory': inventory, // Nullable field
    };
  }
}

class Category {
  final String id;
  final String categoryName;

  Category({
    required this.id,
    required this.categoryName,
  });

  factory Category.fromJson(Map<String, dynamic> json) {
    return Category(
      id: json['_id'],
      categoryName: json['categoryName'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      '_id': id,
      'categoryName': categoryName,
    };
  }
}

class Brand {
  final String id;
  final String brandName;

  Brand({
    required this.id,
    required this.brandName,
  });

  factory Brand.fromJson(Map<String, dynamic> json) {
    return Brand(
      id: json['_id'],
      brandName: json['brandName'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      '_id': id,
      'brandName': brandName,
    };
  }
}

class AddedBy {
  final String id;
  final String name;

  AddedBy({
    required this.id,
    required this.name,
  });

  factory AddedBy.fromJson(Map<String, dynamic> json) {
    return AddedBy(
      id: json['_id'],
      name: json['name'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      '_id': id,
      'name': name,
    };
  }
}