dating_touchme_app/lib/network/network_config.dart

import 'package:dio/dio.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:get/get.dart' hide Response;
import 'package:get_storage/get_storage.dart';

import '../config/env_config.dart';
import '../pages/mine/login_page.dart';

/// API类型枚举，用于区分不同的baseUrl
enum ApiType {
  main,    // 主API
  file,    // 文件上传下载API
}

/// 网络请求配置类
class NetworkConfig {
  static const int connectTimeout = 30000;
  static const int receiveTimeout = 30000;

  /// 根据API类型创建不同的Dio实例
  static Dio createDio({ApiType type = ApiType.main}) {
    // 根据类型选择对应的baseUrl
    String currentBaseUrl;
    switch (type) {
      case ApiType.main:
        currentBaseUrl = EnvConfig.mainBaseUrl;
        break;
      case ApiType.file:
        currentBaseUrl = EnvConfig.fileBaseUrl;
        break;
    }
    
    final dio = Dio(
      BaseOptions(
        baseUrl: currentBaseUrl,
        connectTimeout: Duration(milliseconds: connectTimeout),
        receiveTimeout: Duration(milliseconds: receiveTimeout),
        contentType: 'application/json',
        responseType: ResponseType.json,
      ),
    );

    // 添加请求拦截器
    dio.interceptors.add(AuthInterceptor());
    
    // 添加响应拦截器
    dio.interceptors.add(ResponseInterceptor());
    
    // 添加日志拦截器
    dio.interceptors.add(LogInterceptor(
      requestBody: true,
      responseBody: true,
      error: true,
    ));

    return dio;
  }
}

/// 请求拦截器
class AuthInterceptor extends Interceptor {
  @override
  void onRequest(
    RequestOptions options,
    RequestInterceptorHandler handler,
  ) async {
    // 添加token等认证信息
    final token = _getToken();
    if (token != null && token.isNotEmpty) {
      options.headers['Authorization'] = 'Bearer $token';
    }

    // 添加其他通用请求头
    options.headers['X-APP-ID'] = '50325897884795885';

    handler.next(options);
  }

  String? _getToken() {
    // 从本地存储获取token
    // 这里可以使用get_storage或其他存储方式
    return GetStorage().read('token');
  }
}

/// 响应拦截器
class ResponseInterceptor extends Interceptor {
  @override
  void onResponse(
    Response response,
    ResponseInterceptorHandler handler,
  ) {
    // 统一处理响应数据
    final data = response.data;
    
    // 检查响应状态码
    if (response.statusCode == 200) {
      // 假设后端返回的数据格式为 {"code": 0, "message": "success", "data": {...}}
      if (data is Map<String, dynamic>) {
        final code = data['code'] ?? 0;
        if (code == 0) {
          // 请求成功
          handler.next(response);
        } else {
          // 业务错误
          final message = data['message'] ?? '请求失败';
          _showError(message);
          handler.reject(DioException(
            requestOptions: response.requestOptions,
            error: message,
            type: DioExceptionType.badResponse,
          ));
        }
      } else {
        handler.next(response);
      }
    } else {
      handler.next(response);
    }
  }

  @override
  void onError(DioException err, ErrorInterceptorHandler handler) {
    // 统一处理错误
    String errorMessage = '网络请求失败';
    print('DioError: ${err.message}');
    switch (err.type) {
      case DioExceptionType.connectionTimeout:
      case DioExceptionType.sendTimeout:
      case DioExceptionType.receiveTimeout:
        errorMessage = '网络连接超时，请检查网络';
        break;
      case DioExceptionType.badResponse:
        if (err.response?.statusCode == 401) {
          errorMessage = '登录已过期，请重新登录';
          _handleTokenExpired();
        } else if (err.response?.statusCode == 403) {
          errorMessage = '没有权限访问该资源';
        } else if (err.response?.statusCode == 404) {
          errorMessage = '请求的资源不存在';
        } else if (err.response?.statusCode == 500) {
          errorMessage = '服务器内部错误';
        } else {
          errorMessage = '请求失败，状态码：${err.response?.statusCode}';
        }
        break;
      case DioExceptionType.cancel:
        errorMessage = '请求已取消';
        break;
      default:
        errorMessage = err.message ?? '未知错误';
    }

    _showError(errorMessage);
    handler.reject(err);
  }

  void _showError(String message) {
    // 使用FlutterSmartDialog显示错误信息
    SmartDialog.showToast(message, displayTime: const Duration(seconds: 2));
  }

  void _handleTokenExpired() {
    // 处理token过期逻辑，如清除本地数据、跳转登录页等
    // 这里可以使用Get.offAllNamed('/login')等方式跳转
    GetStorage().remove('token');
    Get.offAll(() => LoginPage());
  }
}