module.exports = {
  injectHead({ pluginConfig }) {
    const trackingId = pluginConfig.tracking_id;
    if (!trackingId) return '';

    return `
    <!-- Google Analytics (GA4 via Plugin) -->
    <script async src="https://www.googletagmanager.com/gtag/js?id=${trackingId}"></script>
    <script>
      window.dataLayer = window.dataLayer || [];
      function gtag(){dataLayer.push(arguments);}
      gtag('js', new Date());
      gtag('config', '${trackingId}');
    </script>
    `;
  }
};