import axios from 'axios'
  import { MessageBox, Message } from 'element-ui'
  import store from '@/store'
  import { getToken } from '@/utils/auth'
  
  // create an axios instance

  // 创建axios实例

  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

  // request拦截器

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

      console.log('do something before request is sent')

      if (store.getters.token) {

        console.log('[X-Token] is a custom headers key')

        // 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 => {

      console.log('do something with request error')

      // do something with request error
      console.log(error) // for debug
      return Promise.reject(error)
    }
  )
  
  // response interceptor

  // respone拦截器

  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

      /**
      * 下面的注释为通过response自定义code来标示请求状态，当code返回如下情况为权限有问题，登出并返回到登录页
      * 如通过xmlhttprequest 状态码标识 逻辑可写在下面error中
      */
      console.log('if the custom code is not 20000, it is judged as an error.')

      // 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;

        // 50008:非法的token; 50012:其他客户端登录了;  50014:Token 过期了;

        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', {
          MessageBox.confirm('你已被登出，可以取消继续留在该页面，或者重新登录', '确定登出', {
            // confirmButtonText: 'Re-Login',
            confirmButtonText: '重新登录',
            // cancelButtonText: 'Cancel',
            cancelButtonText: '取消',

            type: 'warning'
          }).then(() => {
            store.dispatch('user/resetToken').then(() => {

              location.reload()// 为了重新实例化vue-router对象 避免bug

            })
          })
        }
        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