/// Domain Entity: Payment
///
/// Represents a payment transaction from the API.
library;

import 'package:equatable/equatable.dart';

/// Payment Entity
///
/// Contains payment information from API:
/// - name: Payment ID (e.g., "ACC-PAY-2025-00020")
/// - posting_date: Payment date
/// - paid_amount: Amount paid
/// - mode_of_payment: Payment method (e.g., "Chuyển khoản")
/// - invoice_id: Related invoice ID (nullable)
/// - order_id: Related order ID (nullable)
class Payment extends Equatable {
  /// Payment ID (e.g., "ACC-PAY-2025-00020")
  final String name;

  /// Payment posting date
  final DateTime postingDate;

  /// Amount paid
  final double paidAmount;

  /// Payment method (e.g., "Chuyển khoản", null if not specified)
  final String? modeOfPayment;

  /// Related invoice ID (nullable)
  final String? invoiceId;

  /// Related order ID (nullable)
  final String? orderId;

  const Payment({
    required this.name,
    required this.postingDate,
    required this.paidAmount,
    this.modeOfPayment,
    this.invoiceId,
    this.orderId,
  });

  /// Get display payment method
  String get displayPaymentMethod => modeOfPayment ?? 'Chuyển khoản';

  /// Get description based on order/invoice
  String get description {
    if (orderId != null) {
      return 'Thanh toán cho Đơn hàng #$orderId';
    } else if (invoiceId != null) {
      return 'Thanh toán hóa đơn #$invoiceId';
    }
    return 'Thanh toán #$name';
  }

  /// Copy with method for immutability
  Payment copyWith({
    String? name,
    DateTime? postingDate,
    double? paidAmount,
    String? modeOfPayment,
    String? invoiceId,
    String? orderId,
  }) {
    return Payment(
      name: name ?? this.name,
      postingDate: postingDate ?? this.postingDate,
      paidAmount: paidAmount ?? this.paidAmount,
      modeOfPayment: modeOfPayment ?? this.modeOfPayment,
      invoiceId: invoiceId ?? this.invoiceId,
      orderId: orderId ?? this.orderId,
    );
  }

  @override
  List<Object?> get props => [name, postingDate, paidAmount, modeOfPayment, invoiceId, orderId];

  @override
  String toString() {
    return 'Payment(name: $name, paidAmount: $paidAmount, orderId: $orderId)';
  }
}