const express = require('express');
const { google } = require('googleapis');
const cors = require('cors');
const path = require('path');

const app = express();
app.use(cors());
app.use(express.static('public'));

const auth = new google.auth.GoogleAuth({
  keyFile: path.join(__dirname, 'service-account.json'),
  scopes: ['https://www.googleapis.com/auth/drive.readonly'],
});

const drive = google.drive({ version: 'v3', auth });

const FOLDER_ID = '1Oo8EZf8bA-KLDElLBvhR1uA7K0-VbhoV';  // Your folder

app.get('/photos', async (req, res) => {
  try {
    const response = await drive.files.list({
      q: `'${FOLDER_ID}' in parents and mimeType contains 'image/'`,
      fields: 'files(id, name)',
      orderBy: 'createdTime desc',
    });

    const photos = response.data.files.map(file => ({
      id: file.id,
      name: file.name,
      url: `/image/${file.id}`
    }));

    res.json(photos);
  } catch (error) {
    console.error(error);
    res.status(500).json({ error: error.message });
  }
});

app.get('/image/:fileId', async (req, res) => {
  try {
    const fileId = req.params.fileId;
    const response = await drive.files.get({
      fileId: fileId,
      alt: 'media'
    }, { responseType: 'stream' });

    res.setHeader('Content-Type', response.headers['content-type'] || 'image/jpeg');
    response.data.pipe(res);
  } catch (error) {
    res.status(500).send('Error');
  }
});

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});