'use strict';

const SLOW_THRESHOLD_MS = 200;

function timingMiddleware(req, res, next) {
  const start = Date.now();

  res.on('finish', () => {
    const duration = Date.now() - start;
    const msg = `${req.method} ${req.path} ${res.statusCode} ${duration}ms`;
    if (duration >= SLOW_THRESHOLD_MS) {
      console.warn(`[SLOW] ${msg}`);
    } else {
      console.log(`[timing] ${msg}`);
    }
  });

  next();
}

module.exports = timingMiddleware;