import axios from 'axios'
import {
  MessageBox,
  Message,
  Loading
} from 'element-ui'
import store from '@/store'
import {
  getToken
} from '@/utils/auth'
let loading;

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 500000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    config.baseURL = config.requestBase || process.env.VUE_APP_BASE_API
    if (!config.noloading) {
      // do something before request is sent
      loading = Loading.service({
        lock: true,
        background: "rgba(0,0,0,0.4)",
        text: "正在加载中..."
      })
    }
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      //config.headers['X-Token'] = getToken();

      config.headers['Authorization'] = "Bearer " + getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
   */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    if (loading) {
      loading.close()
    }
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.errcode) {
      Message({
        message: res.errmsg || 'Error',
        type: 'error',
        duration: 5 * 1000,
        offset:50
      })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.errcode === 50008 || res.errcode === 50012 || res.errcode === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again',
          'Confirm logout', {
            confirmButtonText: 'Re-Login',
            cancelButtonText: 'Cancel',
            type: 'warning'
          }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.errmsg || 'Error'))
    } else {
      return res
    }
  },
  error => {
    if (loading) {
      loading.close()
    }
    console.log('err' + error) // for debug
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000,
      offset: 50
    })
    return Promise.reject(error)
  }
)

export default service