import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken, removeToken,tansParams } from '@/utils/auth'
import router from '@/router' // @表示src目录
import cache from '@/utils/cache'
import { encryptCBC, decryptCBC } from '@/utils/aescbc'
// create an axios instance
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: 10000 // request timeout
})

// request interceptor
// service.interceptors.request.use(
//   config => {
//     // do something before request is sent
//     if (!config?.custom && store.getters.token) {
//       // let each request carry token
//       // ['X-Token'] is a custom headers key
//       // please modify it according to the actual situation
//       config.headers['Authorization'] = getToken()
//     }
//     return config
//   },
//   error => {
//     // do something with request error
//     console.log(error) // for debug
//     return Promise.reject(error)
//   }
// )

// request拦截器
service.interceptors.request.use(config => {
  // 是否需要加密
  let aqEnnable = true;
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
    config.headers['Authorization'] = getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  config.headers['Content-Type']='application/json'
  //参数加密
  if (config.method === 'post' && config.data) {
    if(aqEnnable){
      config.data = encryptCBC(JSON.stringify(config.data))
    }
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = ''
    //加密
    if(aqEnnable){
      let urlStr = tansParams(config.params);
      urlStr = urlStr.slice(0, -1);
      console.log(urlStr)
      url = config.url + '?params='+ encryptCBC(urlStr)
    }
    //未加密
    if(!aqEnnable){
      url = config.url + '?' + tansParams(config.params);
      url = url.slice(0, -1);
    }
    // config.params = {};
    config.url = url;
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'get')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const requestSize = Object.keys(JSON.stringify(requestObj)).length; // 请求数据大小
    const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
    if (requestSize >= limitSize) {
      console.warn(`[${config.url}]: ` + '请求数据大小超出允许的5M限制，无法进行防重复提交验证。')
      return config;
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                  // 请求地址
      const s_data = sessionObj.data;                // 请求数据
      const s_time = sessionObj.time;                // 请求时间
      const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
    console.log(error)
    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
    // console.log(res)
    if (res.code === 401) {
      removeToken()
      MessageBox.confirm('登录已过期', '退出登录', {
        confirmButtonText: '重新登录',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        router.push({ path: '/login' })
      })
      return
    }
    if (response.request?.responseType === 'blob') { // 文件流
      return res
    } else if (res.code !== 200) {
      Message({
        message: res.msg || 'Error',
        type: 'error',
        duration: 5 * 1000
      })

      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', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      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