import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:ln_jq_app/common/model/vehicle_info.dart';

/// 定义登录渠道的枚举类型
enum LoginChannel {
  station, // 站点
  driver,  // 司机
  none,    // 未登录或未知
}

class StorageService extends GetxService {
  late final GetStorage _box;

  // --- 定义存储时使用的键名 (Key) ---
  static const String _tokenKey = 'user_token';
  static const String _userIdKey = 'user_id';
  static const String _channelKey = 'login_channel';
  static const String _nameKey = 'user_name';
  static const String _phoneKey = 'user_phone';
  static const String _idCardKey = 'user_id_card';
  // 车辆信息的键名
  static const String _vehicleInfoKey = 'vehicle_info';

  // 提供一个静态的 'to' 方法，方便全局访问
  static StorageService get to => Get.find();

  // Service 初始化
  Future<StorageService> init() async {
    _box = GetStorage();
    return this;
  }

  /// --- Getter 方法，用于读取状态 ---

  bool get isLoggedIn => _box.read<String?>(_tokenKey)?.isNotEmpty ?? false;
  String? get token => _box.read<String?>(_tokenKey);
  String? get userId => _box.read<String?>(_userIdKey);
  String? get name => _box.read<String?>(_nameKey);
  String? get phone => _box.read<String?>(_phoneKey);
  String? get idCard => _box.read<String?>(_idCardKey);

  /// 判断是否已有车辆信息缓存
  bool get hasVehicleInfo => _box.hasData(_vehicleInfoKey);

  /// 获取已缓存的车辆信息
  VehicleInfo? get vehicleInfo {
    final vehicleJson = _box.read<String?>(_vehicleInfoKey);
    if (vehicleJson != null) {
      // 使用我们之前创建的辅助函数来解析
      return vehicleInfoFromJson(vehicleJson);
    }
    return null;
  }

  ///获取当前登录渠道
  LoginChannel get loginChannel {
    final channelString = _box.read<String?>(_channelKey);
    if (channelString == 'station') {
      return LoginChannel.station;
    } else if (channelString == 'driver') {
      return LoginChannel.driver;
    }
    return LoginChannel.none;
  }

  /// --- 操作方法 ---
  Future<void> saveLoginInfo({
    required String token,
    required String userId,
    required String channel,
    String? name,
    String? phone,
    String? idCard,
  }) async {
    await _box.write(_tokenKey, token);
    await _box.write(_userIdKey, userId);
    await _box.write(_channelKey, channel);
    await _box.write(_nameKey, name);
    await _box.write(_phoneKey, phone);
    await _box.write(_idCardKey, idCard);
  }

  /// 保存车辆信息
  Future<void> saveVehicleInfo(VehicleInfo data) async {
    // 使用辅助函数将对象转换为 JSON 字符串并保存
    await _box.write(_vehicleInfoKey, vehicleInfoToJson(data));
  }

  /// 清除车辆信息
  Future<void> clearVehicleInfo() async {
    await _box.remove(_vehicleInfoKey);
  }

  /// 删除用户信息 (登出)
  Future<void> clearLoginInfo() async {
    await _box.remove(_tokenKey);
    await _box.remove(_userIdKey);
    await _box.remove(_channelKey);
    await _box.remove(_nameKey);
    await _box.remove(_phoneKey);
    await _box.remove(_idCardKey);
    // 登出时一并清除车辆信息
    await clearVehicleInfo();
  }
}