import axios from 'axios'
import config from '@/config'
import { Notification, Loading } from 'element-ui';

let loadingInstance = null;

export default class Http {
  constructor () {
    this.instance = axios.create({
      baseURL: config.checkUrl(),
      timeout: 10000,
      headers: {
        'Content-Type': 'application/json'
      }
    })

    this.interceptors()
  }

  async get (params) {
    return await this.instance.get(params.url, {
      params: params.data,
      headers: Object.assign({
        token: localStorage.getItem("token")
      }, params.headers )
    })
  }

  async post (params) {
    return await this.instance.post(params.url, params.data, {
      headers: Object.assign({
        token: localStorage.getItem("token")
      }, params.headers )
    })
  }

  interceptors () {
    // 添加请求拦截器
    this.instance.interceptors.request.use(function (config) {
      loadingInstance = Loading.service({
        text: '加载中...'
      })
      return config
    }, function (error) {
      // 对请求错误做些什么
      return Promise.reject(error)
    })

    // 添加响应拦截器
    this.instance.interceptors.response.use(function (response) {
      // 对响应数据做点什么
      loadingInstance.close();
      switch (response.data.status) {
        case 200:
          return response.data.result
          break;
        case 404:
          Notification.error({
            title: '接口出现错误',
            message: response.data.msg,
            duration: 0
          })
          throw new Error(response.data.msg)
          break;
      }
    }, function (error) {
      // 对响应错误做点什么
      return Promise.reject(error)
    })
  }
}