problem_check_system/lib/modules/auth/controllers/login_controller.dart

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:problem_check_system/data/models/auth_model.dart';
import 'package:problem_check_system/app/routes/app_routes.dart';
import 'package:problem_check_system/data/repositories/auth_repository.dart';

class LoginController extends GetxController {
  final AuthRepository _authRepository;
  final TextEditingController usernameController = TextEditingController();
  final TextEditingController passwordController = TextEditingController();

  final isLoading = false.obs;
  final rememberMe = false.obs;

  LoginController({required AuthRepository authRepository})
    : _authRepository = authRepository;

  @override
  void onInit() {
    super.onInit();
    _loadRememberedMe();
  }

  void _loadRememberedMe() {
    rememberMe.value = _authRepository.getRememberMe();
    if (rememberMe.value) {
      final loginData = _authRepository.getLoginKey();
      usernameController.text = loginData.username;
      passwordController.text = loginData.password;
    }
  }

  /// Check if the user is already logged in by delegating to the repository.
  bool isLoggedIn() {
    return _authRepository.isLoggedIn();
  }

  /// 登录逻辑
  Future<void> login() async {
    final username = usernameController.text.trim();
    final password = passwordController.text.trim();

    if (username.isEmpty || password.isEmpty) {
      Get.snackbar('输入错误', '用户名和密码不能为空');
      return;
    }

    isLoading.value = true;
    final loginData = LoginRequest(username: username, password: password);

    if (_authRepository.isOnline) {
      await _onlineLogin(loginData);
    } else {
      _offlineLogin(loginData);
    }
    isLoading.value = false;
  }

  /// 在线登录
  Future<void> _onlineLogin(LoginRequest loginRequest) async {
    try {
      // 调用你的 post 方法
      var loginResponse = await _authRepository.login(loginRequest);
      // 登录成功后
      _authRepository.saveToken(loginResponse.token);
      _authRepository.saveRefreshToken(loginResponse.refreshToken);
      _authRepository.addRememberMe(rememberMe.value);

      if (rememberMe.value) {
        _authRepository.addLoginKey(loginRequest);
      } else {
        _authRepository.removeLoginKey();
      }
      Get.offAllNamed(AppRoutes.home);
      // 登录成功，处理响应
      debugPrint('登录成功: $loginResponse');
    } on DioException catch (e) {
      // 捕获由拦截器处理后抛出的 DioException
      // 拦截器已经显示了 Snackbar，这里你可以做其他业务处理，例如清空表单等。
      debugPrint('登录失败，由DioException捕获: ${e.message}');
    } catch (e) {
      // 捕获其他非 DioException 异常
      debugPrint('发生未知错误: $e');
    }
  }

  void _offlineLogin(LoginRequest loginRequest) {
    final loginData = _authRepository.getLoginKey();

    if (loginData.username == loginRequest.username &&
        loginData.password == loginRequest.password) {
      Get.offAllNamed(AppRoutes.home);
      Get.snackbar('离线登录成功', '您已离线登录到系统');
    } else {
      Get.snackbar('登录失败', '无网络连接，且无法验证本地凭证');
    }
  }
}