import { initAmplitude } from '../amplitude';
import { trackingClickHandler } from './trackingClickHandler';

const initTracking = async ({ amplitudeApiKey }, initAll = true) => {
  // Guard against SSR
  if (typeof document === 'undefined') {
    return;
  }

  // Guard against DNT (Do Not Track) - FF returns 'unspecified' when disabled
  // Note: FF does not support JS retrieving of per-site DNT disabling (shield icon), unless by checking for a honeypot
  // See https://stackoverflow.com/a/35070265/462849
  const dnt = navigator.doNotTrack || window.doNotTrack;
  if (dnt && !['0', 'unspecified'].includes(dnt)) {
    return;
  }

  if (initAll) {
    try {
      await initAmplitude(amplitudeApiKey);
    } catch (e) {
      console.warn('Error on Init:');
      console.error(e);
    }
  }

  // We don't need to manually remove the listener as it is only added once,
  // when the Gatsby browser runtime first starts, and gets removed on full page reload
  document.body.addEventListener('click', trackingClickHandler);
};

export { initTracking };