import axios from 'axios'
import { ElMessage } from 'element-ui'
import { saveAs } from 'file-saver'
import { getAccessToken } from '@/utils/auth'

const baseURL = import.meta.env.VITE_BASE_URL

const errorCode = {
  401: '认证失败，无法访问系统资源',
  403: '当前操作没有权限',
  404: '访问资源不存在',
  default: '系统未知错误，请反馈给管理员'
}

async function blobValidate(data) {
  try {
    const text = await data.text()
    JSON.parse(text)
    return false
  } catch (error) {
    return true
  }
}

export default {
  name(name, isDelete = true) {
    var url =
      baseURL + '/common/download?fileName=' + encodeURIComponent(name) + '&delete=' + isDelete
    axios({
      method: 'get',
      url: url,
      responseType: 'blob',
      headers: { Authorization: 'Bearer ' + getAccessToken() }
    }).then(async (res) => {
      const isLogin = await blobValidate(res.data)
      if (isLogin) {
        const blob = new Blob([res.data])
        this.saveAs(blob, decodeURIComponent(res.headers['download-filename']))
      } else {
        this.printErrMsg(res.data)
      }
    })
  },
  resource(resource) {
    var url = baseURL + '/common/download/resource?resource=' + encodeURIComponent(resource)
    axios({
      method: 'get',
      url: url,
      responseType: 'blob',
      headers: { Authorization: 'Bearer ' + getAccessToken() }
    }).then(async (res) => {
      const isLogin = await blobValidate(res.data)
      if (isLogin) {
        const blob = new Blob([res.data])
        this.saveAs(blob, decodeURIComponent(res.headers['download-filename']))
      } else {
        this.printErrMsg(res.data)
      }
    })
  },
  zip(url, name) {
    var url = baseURL + url
    axios({
      method: 'get',
      url: url,
      responseType: 'blob',
      headers: { Authorization: 'Bearer ' + getAccessToken() }
    }).then(async (res) => {
      const isLogin = await blobValidate(res.data)
      if (isLogin) {
        const blob = new Blob([res.data], { type: 'application/zip' })
        this.saveAs(blob, name)
      } else {
        this.printErrMsg(res.data)
      }
    })
  },
  saveAs(text, name, opts) {
    saveAs(text, name, opts)
  },
  async printErrMsg(data) {
    const resText = await data.text()
    const rspObj = JSON.parse(resText)
    const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
    ElMessage.error(errMsg)
  }
}