const express = require('express');
const path = require('path');
const app = express();
const port = process.env.PORT || 3000;
const backendUrl = process.env.BACKEND_URL || 'http://localhost:3001';

app.get('/config.js', (req, res) => {
  res.set('Content-Type', 'application/javascript');
  res.send(`window.BACKEND_URL = "${backendUrl}";`);
});

app.use(express.static(path.join(__dirname, 'public')));

app.listen(port, () => {
  console.log(`Frontend service listening at http://localhost:${port}`);
  console.log(`Configured to use backend at: ${backendUrl}`);
});