#!/usr/bin/env node
/**
 * Serves storybook-static on port 6007 for Playwright/audit.
 * If storybook-static is missing, serves a stub so index.json returns { entries: {} }
 * and tests can skip with "Run npm run build-storybook first".
 */
const http = require('http');
const fs = require('fs');
const path = require('path');
const { spawn } = require('child_process');

const PORT = 6007;
const staticDir = path.join(process.cwd(), 'storybook-static');
const indexPath = path.join(staticDir, 'index.json');

if (fs.existsSync(indexPath)) {
  const proc = spawn('npx', ['serve', 'storybook-static', '-l', String(PORT)], {
    stdio: 'inherit',
    shell: true,
    cwd: process.cwd(),
  });
  proc.on('error', (err) => {
    console.error(err);
    process.exit(1);
  });
  proc.on('exit', (code) => process.exit(code ?? 0));
} else {
  const stubIndex = JSON.stringify({ entries: {} });
  const server = http.createServer((req, res) => {
    if (req.url === '/index.json' || req.url === '/') {
      res.setHeader('Content-Type', 'application/json');
      res.end(stubIndex);
      return;
    }
    res.statusCode = 404;
    res.end('Not found. Run npm run build-storybook first.');
  });
  server.listen(PORT, () => {
    console.log(`Stub Storybook server at http://localhost:${PORT} (no storybook-static; run build-storybook first)`);
  });
}