// Version: 1.2 - Customer モデル定義
import '../services/database_helper.dart';

/// 顧客（得意先）情報モデル
class Customer {
  int? id;
  String customerCode; // データベースでは product_code として保存
  String name;
  String phoneNumber;
  String email;
  String address;
  int? salesPersonId;
  int taxRate; // デフォルト：8%（標準税率）
  int discountRate;
  DateTime createdAt;
  DateTime updatedAt;

  Customer({
    this.id,
    required this.customerCode,
    required this.name,
    required this.phoneNumber,
    required this.email,
    required this.address,
    this.salesPersonId,
    this.taxRate = 8, // デフォルト：8%
    this.discountRate = 0,
    DateTime? createdAt,
    DateTime? updatedAt,
  }) : createdAt = createdAt ?? DateTime.now(),
       updatedAt = updatedAt ?? DateTime.now();

  /// マップから Customer オブジェクトへ変換
  factory Customer.fromMap(Map<String, dynamic> map) {
    return Customer(
      id: map['id'] as int?,
      customerCode: map['customer_code'] as String, // 'product_code' を 'customer_code' として扱う
      name: map['name'] as String,
      phoneNumber: map['phone_number'] as String,
      email: map['email'] as String,
      address: map['address'] as String,
      salesPersonId: map['sales_person_id'] as int?,
      taxRate: map['tax_rate'] as int? ?? 8,
      discountRate: map['discount_rate'] as int? ?? 0,
      createdAt: DateTime.parse(map['created_at'] as String),
      updatedAt: DateTime.parse(map['updated_at'] as String),
    );
  }

  /// Map に変換
  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'customer_code': customerCode,
      'name': name,
      'phone_number': phoneNumber,
      'email': email,
      'address': address,
      'sales_person_id': salesPersonId,
      'tax_rate': taxRate,
      'discount_rate': discountRate,
      'created_at': createdAt.toIso8601String(),
      'updated_at': updatedAt.toIso8601String(),
    };
  }

  /// カピービルダ
  Customer copyWith({
    int? id,
    String? customerCode,
    String? name,
    String? phoneNumber,
    String? email,
    String? address,
    int? salesPersonId,
    int? taxRate,
    int? discountRate,
    DateTime? createdAt,
    DateTime? updatedAt,
  }) {
    return Customer(
      id: id ?? this.id,
      customerCode: customerCode ?? this.customerCode,
      name: name ?? this.name,
      phoneNumber: phoneNumber ?? this.phoneNumber,
      email: email ?? this.email,
      address: address ?? this.address,
      salesPersonId: salesPersonId ?? this.salesPersonId,
      taxRate: taxRate ?? this.taxRate,
      discountRate: discountRate ?? this.discountRate,
      createdAt: createdAt ?? this.createdAt,
      updatedAt: updatedAt ?? this.updatedAt,
    );
  }
}