import express, { Request, Response } from 'express';
import axios from 'axios';
import bodyParser from 'body-parser';
import path from 'path';

const app = express();
const port = Number(process.env.PORT) || 3000;
const agentUrl = process.env.LLM_AGENT_URL as string | undefined;

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

app.post('/send', async (req: Request, res: Response) => {
  if (!agentUrl) {
    return res.status(500).json({ error: 'LLM_AGENT_URL not configured' });
  }
  try {
    const { message } = req.body;
    const response = await axios.post(agentUrl, { message });
    res.json(response.data);
  } catch (err: any) {
    console.error('Failed to forward message', err.message);
    res.status(500).json({ error: 'Failed to communicate with agent' });
  }
});

app.listen(port, () => console.log(`Chat UI listening on port ${port}`));