class PurchasePayment {
  final int? id;
  final int? poId;
  final int? transactionId;
  final double amount;
  final String? paymentMethod;
  final DateTime? paymentDate;
  final String? notes;

  PurchasePayment({
    this.id,
    this.poId,
    this.transactionId,
    required this.amount,
    this.paymentMethod,
    this.paymentDate,
    this.notes,
  });

  factory PurchasePayment.fromJson(Map<String, dynamic> json) {
    return PurchasePayment(
      id: json['id'],
      poId: json['poId'],
      transactionId: json['transactionId'],
      amount: (json['amount'] ?? 0.0).toDouble(),
      paymentMethod: json['paymentMethod'],
      paymentDate: json['paymentDate'] != null ? DateTime.parse(json['paymentDate']) : null,
      notes: json['notes'],
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'poId': poId,
      'transactionId': transactionId,
      'amount': amount,
      'paymentMethod': paymentMethod,
      'notes': notes,
    };
  }

  PurchasePayment copyWith({
    int? id,
    int? poId,
    int? transactionId,
    double? amount,
    String? paymentMethod,
    DateTime? paymentDate,
    String? notes,
  }) {
    return PurchasePayment(
      id: id ?? this.id,
      poId: poId ?? this.poId,
      transactionId: transactionId ?? this.transactionId,
      amount: amount ?? this.amount,
      paymentMethod: paymentMethod ?? this.paymentMethod,
      paymentDate: paymentDate ?? this.paymentDate,
      notes: notes ?? this.notes,
    );
  }
}