#!/usr/bin/env node
const http = require('http');
const fs = require('fs');
const path = require('path');

const PORT = process.env.PORT || 5173;
const DIST_DIR = path.join(__dirname, '../memory-viewer/dist');

const mimeTypes = {
  '.html': 'text/html',
  '.js': 'text/javascript',
  '.css': 'text/css',
  '.json': 'application/json',
  '.png': 'image/png',
  '.jpg': 'image/jpg',
  '.gif': 'image/gif',
  '.svg': 'image/svg+xml',
  '.ico': 'image/x-icon',
  '.woff': 'font/woff',
  '.woff2': 'font/woff2',
};

const server = http.createServer((req, res) => {
  let filePath = path.join(DIST_DIR, req.url === '/' ? 'index.html' : req.url);
  
  // Handle SPA routing - return index.html for non-file requests
  if (!fs.existsSync(filePath) && !req.url.startsWith('/api')) {
    filePath = path.join(DIST_DIR, 'index.html');
  }

  const ext = path.extname(filePath);
  const contentType = mimeTypes[ext] || 'application/octet-stream';

  fs.readFile(filePath, (err, content) => {
    if (err) {
      res.writeHead(404);
      res.end('Not found');
      return;
    }
    res.writeHead(200, { 'Content-Type': contentType });
    res.end(content);
  });
});

server.listen(PORT, '0.0.0.0', () => {
  console.log(`Memory Viewer frontend serving on http://0.0.0.0:${PORT}`);
  console.log(`Dist folder: ${DIST_DIR}`);
});