import axios from 'axios'
import { Message } from 'element-ui'
import { getToken, removeToken } from '@/utils/auth'
import router, { resetRouter } from '@/router'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  timeout: 10000 // request timeout
  // transformRequest: [function(data) { // 转换数据
  //   const form = new FormData()
  //   if (!data) {
  //     return form
  //   }
  //   Object.keys(data).forEach(k => {
  //     const v = (data[k] !== 0 && !data[k] || data[k] === null ? '' : data[k])
  //     if (Array.isArray(v) && v !== null) {
  //       Object.keys(v).forEach(key => {
  //         const vv = (!v[key] || v[key] === null ? '' : v[key])
  //         form.append(`${k}[${key}]`, vv)
  //       })
  //     } else {
  //       form.append(k, v)
  //     }
  //   })
  //   return form
  // }],
  // headers: {
  //   'Content-Type': 'application/x-www-form-urlencoded'
  // }
})

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

    if (getToken()) {
      // console.log(config, getToken())
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    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 the custom code is not 20000, it is judged as an error.
    if (res.c !== 0) {
      Message({
        message: 'massage: ' + res.m,
        type: 'error',
        duration: 3 * 1000
      })
      if (res.c === 1004) {
        removeToken()
        resetRouter()
        router.push(`/login`)
      }
      return Promise.reject(new Error(res.m || '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