export const GA_MEASUREMENT_ID = process.env.NEXT_PUBLIC_GA_MEASUREMENT_ID || '';

declare global {
  interface Window {
    gtag: (command: string, targetId: string, config?: Record<string, unknown>) => void;
  }
}

export const pageview = (url: string) => {
  if (typeof window !== 'undefined' && window.gtag && GA_MEASUREMENT_ID) {
    window.gtag('config', GA_MEASUREMENT_ID, {
      page_path: url,
    });
  }
};

export const event = (action: string, category: string, label?: string, value?: number) => {
  if (typeof window !== 'undefined' && window.gtag && GA_MEASUREMENT_ID) {
    window.gtag('event', action, {
      event_category: category,
      event_label: label,
      value: value,
    });
  }
};

export const trackContactForm = (_formData: Record<string, string>) => {
  event('submit', 'contact_form', 'contact_form_submission');
};

export const trackButtonClick = (buttonName: string, location: string) => {
  event('click', 'button', `${location}_${buttonName}`);
};

export const trackPageView = (pageTitle: string, _pagePath: string) => {
  event('page_view', 'navigation', pageTitle);
};