class InventoryItem {
  final int? id;
  final int? userId;
  final int? productId;
  final String? tagNumber;
  final String? sku;
  final String? huid;
  final String? purity;
  final double? grossWeight;
  final double? netWeight;
  final double? stoneWeight;
  final double? diamondWeight;
  final double? fineWeight;
  final double? makingCharges;
  final String? makingChargeType;
  final double? purchaseCost;
  final double? metalCost;
  final double? stoneCost;
  final double? certificationCost;
  final double? tax;
  final int? vendorId;
  final int? branchId;
  final String? purchaseRef;
  final String? salesRef;
  final double? saleRate;
  final String? photoUrl;
  final String? status;
  final DateTime? createdAt;

  InventoryItem({
    this.id,
    this.userId,
    this.productId,
    this.tagNumber,
    this.sku,
    this.huid,
    this.purity,
    this.grossWeight,
    this.netWeight,
    this.stoneWeight,
    this.diamondWeight,
    this.fineWeight,
    this.makingCharges,
    this.makingChargeType,
    this.purchaseCost,
    this.metalCost,
    this.stoneCost,
    this.certificationCost,
    this.tax,
    this.vendorId,
    this.branchId,
    this.purchaseRef,
    this.salesRef,
    this.saleRate,
    this.photoUrl,
    this.status,
    this.createdAt,
  });

  factory InventoryItem.fromJson(Map<String, dynamic> json) {
    return InventoryItem(
      id: json['id'],
      userId: json['userId'],
      productId: json['productId'],
      tagNumber: json['tagNumber'],
      sku: json['sku'],
      huid: json['huid'],
      purity: json['purity'],
      grossWeight: json['grossWeight']?.toDouble(),
      netWeight: json['netWeight']?.toDouble(),
      stoneWeight: json['stoneWeight']?.toDouble(),
      diamondWeight: json['diamondWeight']?.toDouble(),
      fineWeight: json['fineWeight']?.toDouble(),
      makingCharges: json['makingCharges']?.toDouble(),
      makingChargeType: json['makingChargeType'],
      purchaseCost: json['purchaseCost']?.toDouble(),
      metalCost: json['metalCost']?.toDouble(),
      stoneCost: json['stoneCost']?.toDouble(),
      certificationCost: json['certificationCost']?.toDouble(),
      tax: json['tax']?.toDouble(),
      vendorId: json['vendorId'],
      branchId: json['branchId'],
      purchaseRef: json['purchaseRef'],
      salesRef: json['salesRef'] ?? json['sales_ref'],
      saleRate: (json['saleRate'] ?? json['sale_rate'])?.toDouble(),
      photoUrl: json['photoUrl'] ?? json['photo_url'],
      status: json['status'],
      createdAt: json['createdAt'] != null ? DateTime.parse(json['createdAt']) : null,
    );
  }
}