import cache from '@/plugins/cache'
import store from '@/store'
import { getTokenKeySessionStorage } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { blobValidate, tansParams } from '@/utils/ruoyi'
import axios from 'axios'
import { Loading, Message, MessageBox, Notification } from 'element-ui'
import { saveAs } from 'file-saver'

let downloadLoadingInstance
// 是否显示重新登录
export let isRelogin = { show: false }

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
const defaultSettings = require('@/settings')
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 100000
})

// request拦截器
service.interceptors.request.use(config => {
  // 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 (getTokenKeySessionStorage() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getTokenKeySessionStorage() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params)
    url = url.slice(0, -1)
    config.params = {}
    config.url = url
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    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 && s_url !=='/affix/upload') {
        const message = '数据正在处理，请勿重复提交'
        console.log(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
  console.log(65,error)
  return Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
  // 未设置状态码则默认成功状态
  const code = res.data.code || 200
  // 获取错误信息
  const msg = errorCode[code] || res.data.msg || errorCode['default']
  // 二进制数据则直接返回
  if (res.request.responseType ===  'blob' || res.request.responseType ===  'arraybuffer') {
    return res.data
  }
  if (code === 401) {
    if (!isRelogin.show) {
      isRelogin.show = true
      if(!defaultSettings.casEnable)
      { 
        MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', { confirmButtonText: '重新登录', cancelButtonText: '取消', type: 'warning' }).then(() => {
          isRelogin.show = false
          store.dispatch('LogOut').then(() => {
            sessionStorage.clear()
            if (!defaultSettings.casEnable) {
              location.href = '/srs'
            }else{
              location.href = '/cas'
            }
          }) 
        }).catch(() => {
          isRelogin.show = false
        })
      }
    }
    return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
  } else if (code === 500) {
    Message({ message: msg, type: 'error',duration:5000 })
    return res.data
  } else if (code === 601) {
    Message({ message: msg, type: 'warning' })
    return Promise.reject('error')
  } else if (code !== 200) {
    Notification.error({ title: msg })
    return Promise.reject('error')
  } else {
    return res.data
  }
},
error => {
  console.log('err' + error)
    
  // 判断是否是请求取消错误
  const isCanceled = error && (
    error.code === 'ERR_CANCELED' ||
      error.code === 'ECONNABORTED' ||
      error.message === 'canceled' ||
      error.message === 'Cancel' ||
      error.__CANCEL__ === true ||
      (typeof error.message === 'string' && /cancel/i.test(error.message))
  )
    
  // 如果是请求取消，直接返回，不显示错误消息
  if (isCanceled) {
    console.log('请求被取消，忽略该错误')
    return Promise.reject(error)
  }
    
  let { message } = error
  if (message == 'Network Error') {
    // 进一步判断是否真的是网络错误，还是页面卸载导致的
    if (window.performance && window.performance.navigation.type === 1) {
      // 页面刷新导致的，忽略
      console.log('页面刷新导致的网络错误，已忽略')
      return Promise.reject(error)
    }
    message = '后端接口连接异常'
    Message({ message: message, type: 'error', duration: 5 * 1000 })
  } else if (message.includes('timeout')) {
    message = '系统接口请求超时'
    Message({ message: message, type: 'error', duration: 5 * 1000 })
  } else if (message.includes('Request failed with status code')) {
    message = '系统接口' + message.substr(message.length - 3) + '异常'
  }
  console.log('接口请求错误：'+message)
  //Message({ message: message, type: 'error', duration: 5 * 1000 })
  return Promise.reject(error)
}
)

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({ text: '正在下载数据，请稍候', spinner: 'el-icon-loading', background: 'rgba(0, 0, 0, 0.7)', })
  return service.post(url, params, {
    transformRequest: [(params) => { return tansParams(params) }],
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    responseType: 'blob',
    ...config
  }).then(async (data) => {
    const isBlob = blobValidate(data)
    if (isBlob) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text()
      const rspObj = JSON.parse(resText)
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
      Message.error(errMsg)
    }
    downloadLoadingInstance.close()
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close()
  })
}

export default service