src/app.js

// src/app.js
import express from 'express';
import cors from 'cors';
import dotenv from 'dotenv';
import chatRoutes from './routes/chat.js';

dotenv.config();
process.env.MPLCONFIGDIR = './.cache/matplotlib';

const app = express();
const PORT = process.env.PORT || 3050;

app.use(cors());
app.use(express.json());

app.use('/api/chat', chatRoutes);

app.get('/api/chat/ping', (req, res) => {
  res.status(200).send('Chat service active');
});

app.use((err, req, res, next) => {
  if (err.response?.status === 404) {
    return res.status(404).json({ 
      error: 'Chat endpoint not found',
      solution: 'Check your API route configuration' 
    });
  }
  next(err);
});

app.listen(PORT, () => {
  console.log(`🚀 Chat API running on port ${PORT}`);
  console.log(`🔑 OpenAI Key: ${process.env.NOVITA_API_KEY ? 'Loaded' : 'MISSING!'}`);
});