import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API,
  withCredentials: true, // send cookies when cross-domain requests
  timeout: 10000 // request timeout
})

const CancelToken = axios.CancelToken
let source = null
function getCancelToken () {
  if (!source) {
    source = CancelToken.source()
  }
  return source.token
}

export function cancelRequest () {
  if (source) {
    source.cancel('abort')
    source = null
  }
}

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    if (store.getters.token) {
      config.headers['Authorization'] = `Bearer ${store.getters.token}`
    }
    if (!config.background) {
      config.cancelToken = getCancelToken()
    }
    return config
  },
  error => {
    console.log(error) // for debug
    // do something with request error
    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 (res.success) {
      return res
    }

    if (!response.config?.custom) {
      Message({
        type: 'error',
        message: res.errMessage || '请求异常'
      })
    }

    return Promise.reject(res)
  },
  error => {
    const isCancel = axios.isCancel(error)
    const { response, config } = error
    if (response) {
      const { status } = response
      if (status === 401) {
        // to re-login
        MessageBox.confirm(
          '登录状态已过期，请重新登录',
          '系统提示',
          {
            type: 'warning',
            confirmButtonText: '重新登录',
            center: true,
            showClose: false,
            showCancelButton: false,
            closeOnClickModal: false
          }
        ).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      } else if (!config?.custom) {
        const { errMessage } = response.data
        Message({
          type: 'error',
          message: errMessage || '请求异常'
        })
      }
      return Promise.reject({ isCancel, ...response.data })
    }

    let { message } = error
    if (!config?.custom && !isCancel) {
      if (message) {
        if (/timeout/.test(message)) {
          message = '请求超时'
        }
      } else {
        message = '请求异常'
      }
      Message({
        type: 'error',
        message
      })
    }
    return Promise.reject({ errCode: -1, errMessage: message, isCancel })
  }
)

export default service