import { convert } from '../utils/base64-to-blob'
import { showLoading, removeLoading } from '../utils/request'
import { Message } from 'element-ui'
import i18n from '../lang'

export const downloadFile = (response: any, name = '') => {
  let blob
  if (response.data) {
    blob = response.data
  } else {
    blob = convert(response)
  }

  const url = window.URL.createObjectURL(blob)
  const link = document.createElement('a')
  link.setAttribute('type', 'hidden')
  link.download = name || getFileNameFromHttpResponse(response)
  link.href = url
  document.body.appendChild(link)
  link.click()
  link.remove()
}

function getFileNameFromHttpResponse(httpResponse: any) {
  try {
    const contentDispositionHeader = httpResponse.headers['content-disposition']
    const result = contentDispositionHeader.split(';')[1].trim().split('=')[1]
    return decodeURIComponent(result.replace(/"/g, ''))
  } catch {
    return 'excel.xlsx'
  }
}

export const readPdfFile = async(data: any) => {
  return new Promise((resolve) => {
    const reader = new FileReader()
    reader.readAsDataURL(data)
    reader.onload = (event: any) => {
      let d = event.target.result
      d = d.replace('data:text/xml', 'data:application/pdf')
      resolve(d)
    }
  })
}

export const downloadFileFromURL = async(
  file: string,
  name: string,
  loading = true,
  download = true
) => {
  if (loading) {
    showLoading()
  }
  try {
    const response = await fetch(file, {
      method: 'GET',
      mode: 'cors',
      cache: 'no-cache',
      credentials: 'same-origin'
    })

    const blob: any = await response.blob()
    if (blob) {
      if (loading) {
        removeLoading()
      }
      if (download) {
        downloadFile({ data: blob }, name)
      } else {
        return blob
      }
    }
  } catch (err) {
    removeLoading()
    Message({
      dangerouslyUseHTMLString: true,
      message: err + `. ${i18n.t('general.tryAgainLater')}`,
      type: 'error',
      duration: 3 * 1000,
      showClose: true
    })
  }
}