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';
  static const String _vehicleInfoKey = 'vehicle_info';
  // 加氢站登录凭证的键名
  static const String _stationAccountKey = 'station_account';
  static const String _stationPasswordKey = 'station_password';


  static StorageService get to => Get.find();

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

  // --- Getters --- 
  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);
  bool get hasVehicleInfo => _box.hasData(_vehicleInfoKey);

  // 记住密码：获取加氢站账号和密码
  String? get stationAccount => _box.read<String?>(_stationAccountKey);
  String? get stationPassword => _box.read<String?>(_stationPasswordKey);

  VehicleInfo? get vehicleInfo {
    final vehicleJson = _box.read<String?>(_vehicleInfoKey);
    if (vehicleJson != null) {
      return vehicleInfoFromJson(vehicleJson);
    }
    return null;
  }

  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;
  }

  // --- Methods ---
  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);
  }

  Future<void> saveVehicleInfo(VehicleInfo data) async {
    await _box.write(_vehicleInfoKey, vehicleInfoToJson(data));
  }

  // 保存加氢站登录凭证
  Future<void> saveStationCredentials(String account, String password) async {
    await _box.write(_stationAccountKey, account);
    await _box.write(_stationPasswordKey, password);
  }

  Future<void> clearVehicleInfo() async {
    await _box.remove(_vehicleInfoKey);
  }

  // 清除加氢站登录凭证
  Future<void> clearStationCredentials() async {
    await _box.remove(_stationAccountKey);
    await _box.remove(_stationPasswordKey);
  }

  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);
    await clearVehicleInfo();
    // 注意：登出时我们不清除“记住的密码”，以便下次用户登录时仍然可以回填
  }
}