(function () {
  'use strict';

  var popup = document.getElementById('travelgo-app-download-popup');
  if (!popup) {
    return;
  }

  var config = window.travelgoAppDownloadPopup || {};
  var maxDisplays = Number(config.maxDisplays || 2);
  var showDelayMs = Number(config.showDelayMs || 2200);
  var downloadUrl = String(config.downloadUrl || '');
  var countKey = 'travelgo_app_download_popup_count_v2';
  var doneKey = 'travelgo_app_download_popup_done_v2';
  var card = popup.querySelector('.travelgo-app-download-popup__card');
  var downloadBtn = popup.querySelector('[data-travelgo-app-popup-download]');
  var closeEls = popup.querySelectorAll('[data-travelgo-app-popup-close]');

  function safeGetInt(key) {
    try {
      return parseInt(window.localStorage.getItem(key) || '0', 10) || 0;
    } catch (_err) {
      return 0;
    }
  }

  function safeSet(key, value) {
    try {
      window.localStorage.setItem(key, value);
    } catch (_err) {
      // Ignore storage failures (private mode, etc.).
    }
  }

  function isDone() {
    try {
      return window.localStorage.getItem(doneKey) === '1';
    } catch (_err) {
      return false;
    }
  }

  function lockScroll(on) {
    document.documentElement.classList.toggle(
      'travelgo-app-download-popup--scroll-lock',
      !!on
    );
  }

  function showPopup() {
    if (isDone()) {
      return;
    }
    var shownCount = safeGetInt(countKey);
    if (shownCount >= maxDisplays) {
      return;
    }
    safeSet(countKey, String(shownCount + 1));
    popup.removeAttribute('hidden');
    popup.setAttribute('aria-hidden', 'false');
    lockScroll(true);
    if (card && typeof card.focus === 'function') {
      card.focus();
    }
  }

  function closePopup(markDone) {
    popup.setAttribute('hidden', '');
    popup.setAttribute('aria-hidden', 'true');
    lockScroll(false);
    if (markDone) {
      safeSet(doneKey, '1');
    }
  }

  closeEls.forEach(function (el) {
    el.addEventListener('click', function () {
      closePopup(false);
    });
  });

  document.addEventListener('keydown', function (event) {
    if (event.key === 'Escape' && !popup.hasAttribute('hidden')) {
      closePopup(false);
    }
  });

  if (downloadBtn) {
    if (downloadUrl !== '') {
      downloadBtn.setAttribute('href', downloadUrl);
    }
    downloadBtn.addEventListener('click', function () {
      closePopup(true);
    });
  }

  window.setTimeout(showPopup, Math.max(200, showDelayMs));
})();