/// 메뉴 엔티티
///
/// - 계층 구조를 표현하기 위해 상위 메뉴 정보를 포함한다.
/// - presentation/data 레이어 세부 구현에 의존하지 않는다.
class MenuItem {
  MenuItem({
    this.id,
    required this.menuCode,
    required this.menuName,
    this.parent,
    this.path,
    this.displayOrder,
    this.isActive = true,
    this.isDeleted = false,
    this.note,
    this.createdAt,
    this.updatedAt,
  });

  /// PK (null 이면 신규 생성)
  final int? id;

  /// 메뉴 코드 (고유)
  final String menuCode;

  /// 메뉴명
  final String menuName;

  /// 상위 메뉴 정보
  final MenuSummary? parent;

  /// 라우트 경로
  final String? path;

  /// 표시 순서
  final int? displayOrder;

  /// 사용 여부
  final bool isActive;

  /// 소프트 삭제 여부
  final bool isDeleted;

  /// 비고
  final String? note;

  /// 생성/수정 일시
  final DateTime? createdAt;
  final DateTime? updatedAt;

  MenuItem copyWith({
    int? id,
    String? menuCode,
    String? menuName,
    MenuSummary? parent,
    String? path,
    int? displayOrder,
    bool? isActive,
    bool? isDeleted,
    String? note,
    DateTime? createdAt,
    DateTime? updatedAt,
  }) {
    return MenuItem(
      id: id ?? this.id,
      menuCode: menuCode ?? this.menuCode,
      menuName: menuName ?? this.menuName,
      parent: parent ?? this.parent,
      path: path ?? this.path,
      displayOrder: displayOrder ?? this.displayOrder,
      isActive: isActive ?? this.isActive,
      isDeleted: isDeleted ?? this.isDeleted,
      note: note ?? this.note,
      createdAt: createdAt ?? this.createdAt,
      updatedAt: updatedAt ?? this.updatedAt,
    );
  }
}

/// 상위 메뉴 요약 정보
class MenuSummary {
  MenuSummary({required this.id, required this.menuName});

  final int id;
  final String menuName;
}

/// 메뉴 생성/수정 입력 모델
class MenuInput {
  MenuInput({
    required this.menuCode,
    required this.menuName,
    this.parentMenuId,
    this.path,
    this.displayOrder,
    this.isActive = true,
    this.note,
  });

  final String menuCode;
  final String menuName;
  final int? parentMenuId;
  final String? path;
  final int? displayOrder;
  final bool isActive;
  final String? note;

  Map<String, dynamic> toPayload() {
    return {
      'menu_code': menuCode,
      'menu_name': menuName,
      'parent_menu_id': parentMenuId,
      'path': path,
      'display_order': displayOrder,
      'is_active': isActive,
      'note': note,
    };
  }
}