import 'package:dio/dio.dart';
import 'package:flutter_jdt_store/global.dart';
import 'package:flutter_jdt_store/utils/utils.dart';
import '../global.dart';

class Request {
  // 构造函数
  Request() {
    init();
  }

  static final Dio _dio = Dio();

  static void init() {
    // 基本配置
    _dio.options.baseUrl = Global.baseUrl;
    _dio.options.connectTimeout = const Duration(seconds: 10);
    _dio.options.receiveTimeout = const Duration(seconds: 10);

    _dio.options.headers["Content-Type"] = "application/json; charset=utf-8";

    _dio.options.headers["token"] = StorageUtil().getString("token");

    // 添加请求拦截器
    _dio.interceptors.add(InterceptorsWrapper(
      onRequest: (options, handler) {
        // 在请求被发送之前做一些事情
        return handler.next(options); // 必须返回 options
      },
    ));

    // 添加响应拦截器
    _dio.interceptors.add(InterceptorsWrapper(
      onResponse: (response, handler) {
        // 在响应被处理之前做一些事情
        final Map<String, dynamic> data = response.data;
        // 状态码不等于200时抛出异常
        if (data["code"] != 200) {
          ToolFn.tips(data["msg"].toString());
          throw DioException(
            requestOptions: response.requestOptions,
            response: response,
            error: data["msg"],
          );
        }
        return handler.next(response); // 必须返回 response
      },
      onError: (DioException e, handler) {
        // 在响应错误被处理之前做一些事情
        return handler.next(e); // 必须返回 error
      },
    ));
  }

  static Future<T> get<T>(String path, {Map<String, dynamic>? params}) async {
    try {
      final Response<T> response =
          await _dio.get<T>(path, queryParameters: params);
      return response.data!;
    } catch (error) {
      throw _handleError(error);
    }
  }

  static Future<T> post<T>(String path, {Map<String, dynamic>? data}) async {
    try {
      final Response<T> response = await _dio.post<T>(path, data: data);
      return response.data!;
    } catch (error) {
      throw _handleError(error);
    }
  }

  // 处理错误
  static Exception _handleError(error) {
    if (error is DioException) {
      String message = "网络请求失败";
      if (error.response != null && error.response!.data != null) {
        message = error.response!.data.toString();
      }
      return Exception(message);
    } else {
      return Exception("未知错误");
    }
  }
}