// 販売伝票テンプレート（簡易実装）
import 'dart:convert';

class SalesInvoiceTemplate {
  final String invoiceNumber;
  final String date;
  final String customerName;
  final List<Map<String, dynamic>> items;
  final int totalAmount;
  final String taxRate;

  const SalesInvoiceTemplate({
    required this.invoiceNumber,
    required this.date,
    required this.customerName,
    required this.items,
    required this.totalAmount,
    this.taxRate = '8',
  });

  factory SalesInvoiceTemplate.fromMap(Map<String, dynamic> data) {
    return const SalesInvoiceTemplate(
      invoiceNumber: '',
      date: '',
      customerName: '',
      items: [],
      totalAmount: 0,
    );
  }

  @override
  String toString() => '販売伝票 #${invoiceNumber} (${date}, 合計：¥$totalAmount)';

  Map<String, dynamic> toJson() {
    return {'invoice': invoiceNumber, 'date': date, 'items': items.map((i) => i).toList(), 'total': totalAmount};
  }
}