import 'package:dio/dio.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:problem_check_system/data/models/auth_model.dart';
import 'package:problem_check_system/data/models/user/user.dart';
import 'package:problem_check_system/data/providers/connectivity_provider.dart';
import 'package:problem_check_system/data/providers/http_provider.dart';

class AuthRepository extends GetxService {
  final HttpProvider httpProvider;
  final GetStorage storage;
  final ConnectivityProvider connectivityProvider;

  AuthRepository({
    required this.httpProvider,
    required this.storage,
    required this.connectivityProvider,
  });

  static const String _tokenKey = 'token';
  static const String _refreshTokenKey = 'refresh_token';
  static const String _loginKey = 'user';
  static const String _rememberPassword = 'remember_password';

  void saveToken(String token) {
    storage.write(_tokenKey, token);
  }

  String? getToken() {
    return storage.read(_tokenKey);
  }

  void saveRefreshToken(String refreshToken) {
    storage.write(_refreshTokenKey, refreshToken);
  }

  String? getRefreshToken() {
    return storage.read(_refreshTokenKey);
  }

  void addLoginKey(LoginRequest login) {
    storage.write(_loginKey, login.toJson());
  }

  /// 登录请求
  LoginRequest getLoginKey() {
    final loginData = storage.read(_loginKey);

    // 检查是否找到数据，并进行反序列化
    if (loginData != null) {
      // 确保类型正确，然后进行反序列化
      return LoginRequest.fromJson(Map<String, dynamic>.from(loginData));
    }

    // 如果没有找到数据，返回一个默认的空对象
    return LoginRequest(username: '', password: '');
  }

  void removeLoginKey() {
    storage.remove(_loginKey);
  }

  void addRememberPassword(bool remembered) {
    storage.write(_rememberPassword, remembered);
  }

  bool getRememberPassword() {
    return storage.read(_rememberPassword);
  }

  void clearAuthData() {
    storage.remove(_tokenKey);
    storage.remove(_refreshTokenKey);
  }

  // 是否在线
  bool get isOnline {
    return connectivityProvider.isOnline.value;
  }

  /// Check if a user is currently logged in by verifying the existence of a token.
  bool isLoggedIn() {
    final token = getToken();
    return token != null && token.isNotEmpty;
  }

  /// Handles the user login process by calling the API and saving the response.
  Future<LoginResponse> login(LoginRequest request) async {
    try {
      final response = await httpProvider.post(
        '/api/Accounts/SignIn',
        data: request.toJson(),
      );

      final loginResponse = LoginResponse.fromJson(response.data);
      return loginResponse;
    } catch (e) {
      throw Exception(e);
    }
  }

  /// 从 API 获取用户个人资料
  Future<User> getUserProfile() async {
    try {
      final response = await httpProvider.get('/api/Accounts/Profile');

      // 将 JSON 数据反序列化为 Profile 模型
      return User.fromJson(response.data);
    } on DioException catch (e) {
      // 专门处理网络错误，例如无网络连接、超时等
      // DioException 包含了更详细的错误信息
      throw Exception('Network error: ${e.message}');
    } catch (e) {
      // 捕获所有其他未知错误
      rethrow; // 重新抛出异常，让调用者来处理
    }
  }

  /// Refreshes the authentication token using the refresh token.
  Future<LoginResponse> refreshToken() async {
    final refreshToken = getRefreshToken();
    if (refreshToken == null || refreshToken.isEmpty) {
      throw Exception('没有可用的刷新token');
    }

    try {
      final response = await httpProvider.post(
        '/auth/refresh',
        data: {'refresh_token': refreshToken},
      );

      final authResponse = LoginResponse.fromJson(response.data);
      saveToken(authResponse.token);
      saveRefreshToken(authResponse.refreshToken);

      return authResponse;
    } catch (e) {
      throw Exception(e);
    }
  }
}