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