import 'package:get/get.dart';
import 'package:get_storage/get_storage.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';
  // 为新字段增加键名
  static const String _nameKey = 'user_name';
  static const String _phoneKey = 'user_phone';
  static const String _idCardKey = 'user_id_card';

  // 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 ---

  /// 判断是否已登录 (通过检查 token 是否存在且不为空)
  bool get isLoggedIn =>
      _box
          .read<String?>(_tokenKey)
          ?.isNotEmpty ?? false;

  /// 获取 Token
  String? get token => _box.read<String?>(_tokenKey);

  /// 获取 UserId
  String? get userId => _box.read<String?>(_userIdKey);

  /// 获取 Name
  String? get name => _box.read<String?>(_nameKey);

  /// 获取 Phone
  String? get phone => _box.read<String?>(_phoneKey);

  /// 获取 ID Card
  String? get idCard => _box.read<String?>(_idCardKey);


  ///获取当前登录渠道
  /// 从存储中读取字符串，并转换为枚举类型
  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 ---
  /// 保存用户信息
  /// @param channel - 登录渠道，station 或 driver
  Future<void> saveLoginInfo({
    required String token,
    required String userId,
    required String channel, // 接收一个字符串类型的渠道
    String? name,
    String? phone,
    String? idCard,
  }) async {
    await _box.write(_tokenKey, token);
    await _box.write(_userIdKey, userId);
    await _box.write(_channelKey, channel);
    // 保存新增的字段，如果为 null, GetStorage 会移除该键
    await _box.write(_nameKey, name);
    await _box.write(_phoneKey, phone);
    await _box.write(_idCardKey, idCard);
  }

  ///删除用户信息，增加删除渠道信息
  Future<void> clearLoginInfo() async {
    await _box.remove(_tokenKey);
    await _box.remove(_userIdKey);
    await _box.remove(_channelKey);
    // 退出时一并清除新增的字段
    await _box.remove(_nameKey);
    await _box.remove(_phoneKey);
    await _box.remove(_idCardKey);
  }
}