import { app, ipcMain } from 'electron';
import { type ProgressInfo, type UpdateDownloadedEvent, autoUpdater } from 'electron-updater';
import * as mainWin from '../win/mainWin';

export function update() {
  // When set to false, the update download will be triggered through the API
  autoUpdater.autoDownload = false;
  autoUpdater.disableWebInstaller = false;
  autoUpdater.allowDowngrade = false;
  // start check
  autoUpdater.on('checking-for-update', function () {
    console.log('Checking for update.');
  });
  // update available
  autoUpdater.on('update-available', (arg) => {
    mainWin.sendEuUpdateCanAvailable(arg, true);
    // win.webContents.send('eu:update-can-available', {
    //   update: true,
    //   version: app.getVersion(),
    //   newVersion: arg?.version,
    // });
  });
  // update not available
  autoUpdater.on('update-not-available', (arg) => {
    mainWin.sendEuUpdateCanAvailable(arg, false);
    // win.webContents.send('eu:update-can-available', {
    //   update: false,
    //   version: app.getVersion(),
    //   newVersion: arg?.version,
    // });
  });

  // Checking for updates
  ipcMain.handle('eu:check-update', async () => {
    if (!app.isPackaged) {
      const error = new Error('The update feature is only available after the package.');
      return { message: error.message, error };
    }

    try {
      return await autoUpdater.checkForUpdatesAndNotify();
    } catch (error) {
      return { message: 'Network error', error };
    }
  });

  // Start downloading and feedback on progress
  ipcMain.handle('eu:start-download', (event) => {
    startDownload(
      (error, progressInfo) => {
        if (error) {
          // feedback download error message
          event.sender.send('eu:update-error', { message: error.message, error });
        } else {
          // feedback update progress message
          event.sender.send('eu:download-progress', progressInfo);
        }
      },
      () => {
        // feedback update downloaded message
        event.sender.send('eu:update-downloaded');
      },
    );
  });

  // Install now
  ipcMain.handle('eu:quit-and-install', () => {
    autoUpdater.quitAndInstall(false, true);
  });
}

function startDownload(
  callback: (error: Error | null, info: ProgressInfo | null) => void,
  complete: (event: UpdateDownloadedEvent) => void,
) {
  autoUpdater.on('download-progress', (info) => callback(null, info));
  autoUpdater.on('error', (error) => callback(error, null));
  autoUpdater.on('update-downloaded', complete);
  autoUpdater.downloadUpdate();
}