import axios from 'axios'

  import { MessageBox, Message } from 'element-ui'

  import store from '@/store'

  import { getToken } from '@/utils/auth'

  
  // 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: 5000 // request timeout

  })
  
  // request interceptor
  service.interceptors.request.use(
    config => {
      // do something before request is sent

      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()

      }
      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 => {
      const res = response.data

  
      // if the custom code is not 20000, it is judged as an error.

      if (res.code !== 20000) {
        Message({
          message: res.message || 'Error',
          type: 'error',
          duration: 5 * 1000
        })

        // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;

        if (res.code === 50008 || res.code === 50012 || res.code === 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.message || 'Error'))
      } else {

        return res

      }
    },
    error => {

      console.log('err' + error) // for debug
      Message({
        message: error.message,
        type: 'error',
        duration: 5 * 1000
      })

      return Promise.reject(error)
    }
  )
  
  export default service