import Vue from 'vue'
import axios from 'axios'
import store from '../store'
import _ from 'lodash'
import { Toast, Notify } from 'vant'
import { getCookieValue } from '@/utils'

const host = window.location.host
const domain = host.substring(0, host.indexOf('.')) || host.substring(0, host.indexOf(':'))
const request = axios.create({
  withCredentials: true,
  baseURL: process.env.API_DOMAIN,
  timeout: 50000,
  headers: {
    'Content-Type': 'application/json;charset=UTF-8'
  }
})

let loading = null
// 当前正在请求的数量
let needLoadingRequestCount = 0

// 显示loading
function showLoading () {
  if (needLoadingRequestCount === 0 && !loading) {
    loading = Toast.loading({
      message: '拼命获取中',
      forbidClick: true,
      duration: 0
    })
  }
  needLoadingRequestCount++
}

// 隐藏loading
function hideLoading () {
  needLoadingRequestCount--
  needLoadingRequestCount = Math.max(needLoadingRequestCount, 0) // 做个保护
  if (needLoadingRequestCount === 0) {
    // 关闭loading
    toHideLoading()
  }
}

// 防抖：将 300ms 间隔内的关闭 loading 便合并为一次。防止连续请求时， loading闪烁的问题。
const toHideLoading = _.debounce(() => {
  loading.clear()
  loading = null
}, 300)

// Add a request interceptor
request.interceptors.request.use(request => {
  const inviteId = store.getters['common/inviteId']
  const requestUrl = request.url

  // 因为微信开发者工具重复授权，本地开发时写死
  if (/^(0|192|10|localhost)/.test(domain)) {
    request.headers.wechatToken = '911cfb17f5e881672fb6d9a625f00981'
  } else {
    request.headers.wechatToken = getCookieValue('fanbutingwechatToken')
  }

  request.url = requestUrl + (requestUrl.indexOf('?') > -1 ? '&' : '?') + 'nextUrl=' + encodeURIComponent(location.href) + (inviteId ? '&invite_id=' + inviteId : '')

  // 判断当前请求是否设置了不显示Loading
  if (request.showLoading) {
    showLoading()
  }

  return request
}, error => {
  // 判断当前请求是否设置了不显示Loading
  if (loading) {
    hideLoading()
  }
  Notify({
    type: 'warning',
    message: '请求超时'
  })
  // Do something with request error
  return Promise.reject(error)
})

// Add a response interceptor
request.interceptors.response.use(response => {
  // Do something with response data
  const { code, url } = response.data
  if (loading) {
    hideLoading()
  }
  if (code === 401 && url) {
    Vue.cookie.delete('fanbutingwechatToken')
    location.replace(url)
  }
  return response.data
}, (error) => {
  if (loading) {
    hideLoading()
  }
  Notify({
    type: 'danger',
    message: '数据获取失败！'
  })
  // Do something with response error
  return Promise.reject(error)
})

export default request