import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_app/http/config.dart';
import 'package:bot_toast/bot_toast.dart';

class Http {
  Dio _dio;

  Http() {
    this._dio = new Dio(new BaseOptions(
      baseUrl: config.BASE_URL,
      connectTimeout: 3000,
      receiveTimeout: 3000,
    ));


    this._dio.interceptors.add(InterceptorsWrapper(
      onRequest:(RequestOptions options){
        /// 请求发送前拦截，对 queryParameters 参数进行RSA公钥加密，放到token中发送给后端
        /// 后端私钥解密，查询数据，然后通过私钥加密数据再返回给前端
        ///options.headers = options.queryParameters;
        ///print(options.headers);
        return options;
      },
      onResponse:(Response response) {
        /// 响应拦截器，将数据返回给前端之前先使用公钥解密后端的数据，然后将解密后明文给前端
        // 在返回响应数据之前做一些预处理
        return response;
      },
      onError: (DioError e) {
        return e;
      }
    ));
  }

  /***
   * get 请求
   * url 请求地址
   * params 请求参数
   */
  get (String url, Object params) async {
    Response response;
    try {
      response = await this._dio.get(url, queryParameters: params);
      return response.data;
    } on DioError catch (e) {
      if (CancelToken.isCancel(e)) {
        BotToast.showSimpleNotification(
            title: 'GET请求取消',
            subTitle: e.message,
            hideCloseButton: true
        );
      }
      BotToast.showSimpleNotification(
          title: 'GET请求错误',
          subTitle: e.message,
          hideCloseButton: true
      );
      print(e.message);
    }
  }

  /***
   * post 请求
   * url 请求地址
   * params 请求参数
   */
  post (String url, Object params) async {
    Response response;
    try {
      response = await this._dio.post(url, data: params);
      return response.data;
    } on DioError catch (e) {
      if (CancelToken.isCancel(e)) {
        BotToast.showSimpleNotification(
            title: 'POST请求取消',
            subTitle: e.message,
            hideCloseButton: true
        );
      }
      BotToast.showSimpleNotification(
          title: 'POST请求错误',
          subTitle: e.message,
          hideCloseButton: true
      );
    }
  }

}