const { createProxyMiddleware } = require('http-proxy-middleware');

module.exports = function(app) {
  app.use(
    '/api',
    createProxyMiddleware({
      target: process.env.BACKEND_URL || 'http://backend:7510',
      changeOrigin: true,
      logLevel: 'debug',
      // Forward the real IP address
      onProxyReq: (proxyReq, req, res) => {
        // Get the real client IP
        const clientIp = req.headers['x-forwarded-for'] || 
                        req.connection.remoteAddress ||
                        req.socket.remoteAddress ||
                        req.connection.socket.remoteAddress;
        
        // Set the forwarded headers
        proxyReq.setHeader('X-Forwarded-For', clientIp);
        proxyReq.setHeader('X-Real-IP', clientIp);
        proxyReq.setHeader('X-Forwarded-Proto', req.protocol);
        proxyReq.setHeader('X-Forwarded-Host', req.headers.host);
      },
      onError: (err, req, res) => {
        console.error('Proxy Error:', err);
        res.status(500).json({ error: 'Proxy Error', message: err.message });
      }
    })
  );
};