import express from 'express';
import client from 'prom-client';

const app = express();
const collectDefaultMetrics = client.collectDefaultMetrics;
collectDefaultMetrics({ prefix: 'thetiptop_' });

// Exemple de compteur HTTP
const httpRequestCounter = new client.Counter({
  name: 'thetiptop_http_requests_total',
  help: 'Nombre total de requêtes HTTP',
  labelNames: ['method', 'route', 'status_code']
});

app.use((req, res, next) => {
  res.on('finish', () => {
    httpRequestCounter.inc({
      method: req.method,
      route: req.route ? req.route.path : req.path,
      status_code: res.statusCode
    });
  });
  next();
});

app.get('/metrics', async (req, res) => {
  res.set('Content-Type', client.register.contentType);
  res.end(await client.register.metrics());
});

app.listen(4000, () => console.log('Backend en écoute sur le port 4000'));