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

const app = express();
const PORT = process.env.PORT || 8080;

// Define target URLs
const serviceUrls = {
  HOME: process.env.HOME_URL || "http://prd-microfront-loja-home.domain-microfront-loja.svc.cluster.local",
  CHECKOUT: process.env.CHECKOUT_URL || "http://prd-microfront-loja-checkout.domain-microfront-loja.svc.cluster.local",
  PRODUCT: process.env.PRODUCT_URL || "http://prd-microfront-loja-product.domain-microfront-loja.svc.cluster.local",
  CART: process.env.CART_URL || "http://prd-microfront-loja-cart.domain-microfront-loja.svc.cluster.local",
};
console.log(serviceUrls)
// Create a generic proxy middleware function
function createProxy(path, target) {
  return createProxyMiddleware(path, {
    target,
    changeOrigin: true,
    pathRewrite: {
      [`^${path}`]: '',
    },
    onProxyRes(proxyRes) {
      proxyRes.headers['Access-Control-Allow-Origin'] = '*';
      proxyRes.headers['Cache-Control'] = 'no-cache';
    },
    onProxyReq(proxyReq) {
      proxyReq.setHeader('Accept', '*/*');
    },
  });
}

// Create proxy middleware instances
const homeProxy = createProxy('/', serviceUrls.HOME);
const cartProxy = createProxy('/cart', serviceUrls.CART);
const checkoutProxy = createProxy('/checkout', serviceUrls.CHECKOUT);
const productProxy = createProxy('/product/:slug', serviceUrls.PRODUCT);

// Middleware for handling static files
function handleStaticFiles(req, res, next) {
  if (req.url.endsWith('.js') || req.url.endsWith('.css')) {
    // Handle static files differently if needed
    // Example: serve from a different location
  } else {
    next();
  }
}

// Health check endpoint
function healthCheck(_, res) {
  res.send('Hello, I\'m alive!');
}

// Apply middleware
app.use('/health-check', healthCheck);
app.use(handleStaticFiles); // Handle static files before proxies
app.use('/cart', cartProxy);
app.use('/checkout', checkoutProxy);
app.use('/product', productProxy);
app.use('/', homeProxy);

app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});