/**
 * Created by ebi on 2017/5/11.
 */
import axios from './axios.js'
import router from '../router'
import { removeToken, getToken } from '../utils/auth'
import { ElMessage } from 'element-plus'

axios.defaults.baseURL = ''

axios.interceptors.request.use(config => {
  config.headers.token = getToken()
  // 小程序里用m的页面
  config.headers.Platform = 'pc'
  if (getToken() === null || getToken() === undefined) {
    delete config.headers.token
  }
  return config
}, err => {
  return Promise.reject(err)
})

// insurance 保险 502 503 504时兜底的
function fetch (url = '', params = {}, method = 'get', contentType = 'form', header = {}, insurance, timeout = 15000) {
  contentType === 'form' && (contentType = 'application/x-www-form-urlencoded')
  contentType === 'json' && (contentType = 'application/json')
  contentType === 'file' && (contentType = 'multipart/form-data')
  const query = []
  for (const k in params) {
    query.push(k + '=' + params[k])
  }
  let qs = query.join('&')
  if (contentType === 'application/x-www-form-urlencoded' && query.length > 0) {
    url += (url.indexOf('?') < 0 ? '?' : '&') + qs
  }
  if (contentType !== 'application/x-www-form-urlencoded' && method !== 'get') {
    qs = params
  }
  return new Promise((resolve, reject) => {
    const requestParams = {
      timeout,
      method,
      url: '/api' + url,
      data: qs,
      headers: {
        'Content-Type': contentType,
        ...header
      }
    }
    const success = (response) => {
      const {
        status,
        data = {},
        statusText
      } = response
      if (status >= 200 && status <= 401) {
        if (data.code === 401) { // 未登录c
          removeToken()
          router.push(`/?redirect=${encodeURIComponent(window.location.href)}`)
          reject(new Error('需要登录'))
          ElMessage.error('登录过期，请重新登录')
          return
        }
        resolve(data)
      } else if (status === 500) {
        resolve(data)
        router.push('/500')
      } else {
        resolve(data)
        ElMessage.success(status + '-' + statusText)
      }
    }
    axios(requestParams).then(success).catch((err) => {
      if (/502|503|504/.test(err.message) || (err + '').indexOf('timeout') > -1) {
        if (insurance) {
          resolve(insurance)
          return
        }
        let msg = '系统繁忙，正在为您排队中，请稍后再试'
        if (window.location.href.indexOf('/zu') > -1) {
          msg += ` ${err.message}`
        }
        ElMessage.error(msg)
      } else {
        resolve(err.data)
        // ElMessage.error(err.data.error_description ? err.data.error_description : '网络异常，请点击重试')
      }
    })
  })
}

export default fetch