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

module.exports = function(app) {
  // Get API base from environment variable or use default
  const apiBase = process.env.REACT_APP_API_BASE || 'https://api.azaion.com';
  
  console.log(`[proxy] /proxy -> ${apiBase}`);
  
  // Proxy /proxy requests to the Azaion API
  app.use(
    '/proxy',
    createProxyMiddleware({
      target: apiBase,
      changeOrigin: true,
      pathRewrite: {
        '^/proxy': '', // Remove /proxy prefix when forwarding
      },
      onProxyReq: (proxyReq) => {
        // Ensure JSON content-type is kept if present
        if (!proxyReq.getHeader('content-type')) {
          proxyReq.setHeader('content-type', 'application/json');
        }
      },
      logLevel: 'debug', // Enable logging for debugging
    })
  );

  // Add server info endpoint so UI can auto-detect proxy status
  app.get('/__server-info', (req, res) => {
    res.json({ 
      proxyEnabled: true, 
      apiBase: apiBase 
    });
  });
};