const download0 = (data: Blob, fileName: string, mineType: string) => {
  // 创建 blob
  const blob = new Blob([data], { type: mineType })
  // 创建 href 超链接，点击进行下载
  window.URL = window.URL || window.webkitURL
  const href = URL.createObjectURL(blob)
  const downA = document.createElement('a')
  downA.href = href
  downA.download = fileName
  downA.click()
  // 销毁超连接
  window.URL.revokeObjectURL(href)
}

const download = {
  // 下载 Excel 方法
  excel: (data: Blob, fileName: string) => {
    download0(data, fileName, 'application/vnd.ms-excel')
  },
  // 下载 Word 方法
  word: (data: Blob, fileName: string) => {
    download0(data, fileName, 'application/msword')
  },
  // 下载 Zip 方法
  zip: (data: Blob, fileName: string) => {
    download0(data, fileName, 'application/zip')
  },
  // 下载 Html 方法
  html: (data: Blob, fileName: string) => {
    download0(data, fileName, 'text/html')
  },
  // 下载 Markdown 方法
  markdown: (data: Blob, fileName: string) => {
    download0(data, fileName, 'text/markdown')
  }
}

export default download

export function downloadFile(url: string, fileName: string) {
  const link = document.createElement('a')
  // 这里是将url转成blob地址，
  fetch(url)
    .then((res) => res.blob())
    .then((blob) => {
      // 将链接地址字符内容转变成blob地址
      link.href = URL.createObjectURL(blob)
      link.download = fileName
      document.body.appendChild(link)
      link.click()
      URL.revokeObjectURL(link.href) //清除引用
      document.body.removeChild(link)
    })
}