// models/route_model.dart
import 'dart:convert';

class RouteModel {
  // 映射到后端新字段
  final String id;
  final String menuName;   // 原来的 title
  final String menuUrl;    // 原来的 path
  final String parentId;
  final String parentIds;
  final String menuPerms;
  final int menuType;      // 1/2 ...
  final String menuAttribution;
  final int sort;
  final int showFlag;      // 1 可见，0 隐藏
  final Map<String, dynamic> extValues;

  final List<RouteModel> children;

  RouteModel({
    required this.id,
    required this.menuName,
    required this.menuUrl,
    required this.parentId,
    required this.parentIds,
    required this.menuPerms,
    required this.menuType,
    required this.menuAttribution,
    required this.sort,
    required this.showFlag,
    required this.extValues,
    required this.children,
  });

  factory RouteModel.fromJson(Map<String, dynamic> json) {
    // 安全解析工具
    String _s(dynamic v) => v == null ? '' : v.toString();
    int _i(dynamic v) {
      if (v == null) return 0;
      if (v is int) return v;
      return int.tryParse(v.toString()) ?? 0;
    }

    final rawChildren = json['children'];
    final children = <RouteModel>[];
    if (rawChildren is List) {
      for (final c in rawChildren) {
        if (c is Map<String, dynamic>) {
          children.add(RouteModel.fromJson(c));
        } else if (c is Map) {
          children.add(RouteModel.fromJson(Map<String, dynamic>.from(c)));
        }
      }
    }

    // extValues 兼容
    Map<String, dynamic> ext = {};
    if (json['extValues'] is Map) {
      ext = Map<String, dynamic>.from(json['extValues']);
    }

    return RouteModel(
      id: _s(json['id']),
      menuName: _s(json['menuName']),
      menuUrl: _s(json['menuUrl']),
      parentId: _s(json['parentId']),
      parentIds: _s(json['parentIds']),
      menuPerms: _s(json['menuPerms']),
      menuType: _i(json['menuType']),
      menuAttribution: _s(json['menuAttribution']),
      sort: _i(json['sort']),
      showFlag: _i(json['showFlag']),
      extValues: ext,
      children: children,
    );
  }

  Map<String, dynamic> toJson() => {
    'id': id,
    'menuName': menuName,
    'menuUrl': menuUrl,
    'parentId': parentId,
    'parentIds': parentIds,
    'menuPerms': menuPerms,
    'menuType': menuType,
    'menuAttribution': menuAttribution,
    'sort': sort,
    'showFlag': showFlag,
    'extValues': extValues,
    'children': children.map((c) => c.toJson()).toList(),
  };

  /// 是否可见（供显示逻辑判断）
  bool get visible => showFlag == 1;

  /// 是否是菜单项（接口好像用 menuType 表示层级/类型）
  bool get isMenu => menuType == 2;

  /// 叶子节点判定（无子节点）
  bool get isLeaf => children.isEmpty;

  /// 页面标题：优先 menuName，如果 extValues 中含 title 则优先使用
  String get title {
    if (menuName.isNotEmpty) return menuName;
    if (extValues.containsKey('title')) return extValues['title']?.toString() ?? '';
    return '';
  }
}