// 封装一个方法 在utils中 名为 downloadSaveFile.js
// 使用时 引入（按照自己的路劲写）  import { downloadFiles} from '../../utils/downloadSaveFile'


function downloadFiles(type, urls) {
  checkAuth(() => {
    wx.showLoading({
      title: '正在下载',
      mask: true
    })
    for (let i = 0; i < urls.length; i++) {
      downloadSaveFile(
        urls[i],
      );
    }
  })
}

//下载文件
function downloadSaveFile(url, successc) {
  let isimg = 'bmp,jpg,png,tif,gif,pcx,tga,exif,fpx,svg,psd,cdr,pcd,dxf,ufo,eps,ai,raw,wmf, jpeg'.includes(url.split('.').slice(-1))
  if (isimg) {
  // 如果是图片类型
    wx.downloadFile({
      url: url,
      success: res => {
        if (res.statusCode === 200) {
          wx.saveImageToPhotosAlbum({
            filePath: res.tempFilePath,
            success: res => {
              wx.showToast({
                title: '保存成功',
                icon: "none"
              })
            },
            fail: res => {
              wx.showToast({
                title: '保存失败',
                icon: "none"
              })
            }
          })

        }
      }
    })

  } else {
  // 如果是视频类型
    wx.downloadFile({
      url: url,
      success: res => {
        if (res.statusCode === 200) {
          wx.saveVideoToPhotosAlbum({
            filePath: res.tempFilePath,
            success: res => {
              // successc && successc();
              wx.showToast({
                title: '保存成功',
                icon: "none"
              })
            },
            fail: res => {
                wx.showToast({
                title: '保存失败',
                icon: "none"
              })
            }
          })
        }
      }
    })
  }
}

//检查权限
function checkAuth(gotc) {
  //查询权限
  wx.showLoading({
    title: '检查授权情况',
    mask: true
  })
  wx.getSetting({
    success(res) {
      wx.hideLoading();
      if (!res.authSetting['scope.writePhotosAlbum']) {
        //请求授权
        wx.authorize({
          scope: 'scope.writePhotosAlbum',
          success() {
            //获得授权，开始下载
            gotc && gotc();
          },
          fail() {
            wx.showModal({
              title: '',
              content: '保存到系统相册需要授权',
              confirmText: '授权',
              success(res) {
                if (res.confirm) {
                  wx.openSetting({
                    success(res) {
                      if (res.authSetting['scope.writePhotosAlbum'] === true) {
                        gotc && gotc();
                      }
                    }
                  })
                }
              },
              fail() {
                wx.showToast({
                  title: '打开设置页失败',
                  icon: 'none',
                })
              }
            })
          }
        })
      } else {
        //已有授权
        gotc && gotc();
      }
    },
    fail() {
      wx.hideLoading();
      wx.showToast({
        title: '获取授权失败',
        icon: 'none',
      })
    }
  })
}

module.exports = {
  downloadFiles,
  checkAuth,
  downloadSaveFile
};