import axios from 'axios'
import { ElNotification, ElMessageBox, ElMessage, ElLoading } from 'element-plus'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/ruoyi'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'
import useUserStore from '@/store/modules/user'

const TIMEOUT = 10000
const REPEAT_SUBMIT_DEFAULT_INTERVAL = 1000
const CACHE_SIZE_LIMIT = 5 * 1024 * 1024
const ERROR_MESSAGE_DURATION = 5000

let downloadLoadingInstance: any
export let isRelogin = { show: false }

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'

const service = axios.create({
  baseURL: import.meta.env.VITE_APP_BASE_API,
  timeout: TIMEOUT
})

service.interceptors.request.use(
  config => {
    const isToken = (config.headers || {}).isToken === false
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
    const interval = (config.headers || {}).interval || REPEAT_SUBMIT_DEFAULT_INTERVAL

    if (getToken() && !isToken) {
      config.headers['Authorization'] = 'Bearer ' + getToken()
    }

    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 requestSize = JSON.stringify(requestObj).length

      if (requestSize >= CACHE_SIZE_LIMIT) {
        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) {
        cache.session.setJSON('sessionObj', requestObj)
      } else {
        const { url: s_url, data: s_data, time: s_time } = sessionObj
        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))
        }
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
    return config
  },
  error => {
    console.log(error)
    return Promise.reject(error)
  }
)

service.interceptors.response.use(
  res => {
    const code = res.data.code || 200
    const msg = errorCode[code] || res.data.msg || errorCode['default']

    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
      return res.data
    }

    const codeHandlers = {
      401: () => {
        if (!isRelogin.show) {
          isRelogin.show = true
          ElMessageBox.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
              useUserStore()
                .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。')
      },
      500: () => {
        ElMessage({ message: msg, type: 'error' })
        return Promise.reject(new Error(msg))
      },
      601: () => {
        ElMessage({ message: msg, type: 'warning' })
        return Promise.reject(new Error(msg))
      }
    }

    if (codeHandlers[code]) {
      return codeHandlers[code]()
    }

    if (code !== 200) {
      ElNotification.error({ title: msg })
      return Promise.reject('error')
    }

    return Promise.resolve(res.data)
  },
  error => {
    console.log('err' + error)
    let { message } = error

    const errorMessages = {
      'Network Error': '后端接口连接异常',
      timeout: '系统接口请求超时',
      'Request failed with status code': `系统接口${message.slice(-3)}异常`
    }

    for (const [key, value] of Object.entries(errorMessages)) {
      if (message.includes(key)) {
        message = value
        break
      }
    }

    ElMessage({ message, type: 'error', duration: ERROR_MESSAGE_DURATION })
    return Promise.reject(error)
  }
)

export function download(url, params, filename, config) {
  downloadLoadingInstance = ElLoading.service({
    text: '正在下载数据，请稍候',
    background: 'rgba(0, 0, 0, 0.7)'
  })

  return service
    .post(url, params, {
      transformRequest: [params => 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']
        ElMessage.error(errMsg)
      }
      downloadLoadingInstance.close()
    })
    .catch(r => {
      console.error(r)
      ElMessage.error('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close()
    })
}

export default service