import Taro from "@tarojs/taro";

export function saveImage(url) {
  // 下载网络图片，返回本地 temp 文件
  const download = () => {
    return Taro.downloadFile({ url }).then(res => {
      if (res.statusCode === 200) {
        return res.tempFilePath
      }
      throw new Error("图片下载失败")
    })
  }

  const save = async () => {
    try {
      const filePath = await download()
      await Taro.saveImageToPhotosAlbum({ filePath })
      Taro.showToast({ title: "保存成功" })
    } catch (e) {
      console.warn(e)
      Taro.showToast({ title: "图片保存失败", icon: "none" })
    }
  }

  Taro.getSetting().then(res => {
    const authorized = res.authSetting["scope.writePhotosAlbum"]

    if (!authorized) {
      Taro.authorize({
        scope: "scope.writePhotosAlbum",
        success: () => {
          save()
        },
        fail: () => {
          Taro.showModal({
            title: "提示",
            content: "需要开启相册权限才能保存图片",
            success: (r) => {
              if (r.confirm) Taro.openSetting()
            }
          })
        }
      })
    } else {
      save()
    }
  })
}