import axios from 'axios'
import { Notification, MessageBox, Message, Loading } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/bonus'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'
import { encryptCBC, decryptCBC } from '@/utils/aescbc'

let downloadLoadingInstance
let loadingInstance = null
// 是否显示重新登录
export let isRelogin = { show: false }
axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 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: 10000 * 5,
})

// request拦截器
service.interceptors.request.use(
  config => {
    loadingInstance = Loading.service({
      lock: true, // 锁定屏幕
      text: '正在发起网络请求，请稍后...', // 提示的文字
      spinner: 'el-icon-loading', // 自定义加载图标
      background: 'rgba(0, 0, 0, 0.7)', // 背景颜色
    })
    // 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'] = 'Bearer ' + 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['tokenType'] = 'sys'
    //  return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    // get请求映射params参数
    if (config.method === 'get' && config.params) {
      let param = tansParams(config.params)
      if (param) {
        param = param.slice(0, -1)
        param = encryptCBC(param)
      }
      let url = config.url + '?' + param
      config.params = {}
      config.url = url
    }
    if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
      // console.log(config)
      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)
        }
      }
    }
    // console.log(config)

    if (config.headers['Content-Type'] == 'application/json;charset=utf-8') {
      if (typeof config.data == 'object') {
        config.data = encryptCBC(JSON.stringify(config.data))
        config.headers['Content-Type'] = 'application/json'
      }
    }
    //对下载请求进行数据参数拦截加密
    if (config.headers['Content-Type'] == 'application/x-www-form-urlencoded') {
      // console.log(config)
      // console.log(config.data)
      if (typeof config.data == 'object') {
        // console.log(config.data)
        let formData = tansParams(config.data)
        if (formData) {
          formData = formData.slice(0, -1)
          let formdata = {}
          formdata.formData = encryptCBC(formData)
          config.data = formdata
        }
      } else {
        config.data = 'formData=' + encryptCBC(JSON.stringify(config.data))
      }
    }

    if (config.headers['Content-Type'] == null || config.headers['Content-Type'] == '') {
      config.headers['Content-Type'] = 'application/json'
      console.warn('请求类型为空')
    }
    return config
  },
  error => {
    if (loadingInstance) loadingInstance.close()
    console.log(error)
    Promise.reject(error)
  }
)

// 响应拦截器
service.interceptors.response.use(
  res => {
    if (loadingInstance) loadingInstance.close()
    //自动解密
    // console.log("res.data.decrypt=="+res.data.decrypt)
    if (typeof res.data.decrypt != 'undefined' && res.data.decrypt) {
      const resultData = decryptCBC(res.data.data)
      res.data = JSON.parse(resultData)
      // console.log('🚀 ~ request.js--> 返回结果:', res.data)
    }
    // 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
        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(() => {
              location.href = '/index'
            })
          })
          .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' })
      Message.error({ type: 'error', message: msg, dangerouslyUseHTMLString: true })
      return Promise.reject(new Error(msg))
    } 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 => {
    if (loadingInstance) loadingInstance.close()
    console.log('err' + error)
    let { message } = error
    if (message == 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    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', encryption: 'encryption' },
      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 function derive(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, JSON.stringify(params), {
      // transformRequest: [(params) => { return tansParams(params) }],
      headers: {
        // 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
        'Content-Type': 'application/json; charset=UTF-8',
        encryption: 'encryption',
      },
      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