(function () {
  'use strict';

  var popupEl = null;
  var autoCloseTimer = null;
  var popupBound = false;

  function createPopup() {
    if (popupEl) {
      return popupEl;
    }

    popupEl = document.createElement('div');
    popupEl.className = 'eventup-marketing-popup';
    popupEl.setAttribute('data-marketing-popup', '');
    popupEl.setAttribute('role', 'dialog');
    popupEl.setAttribute('aria-modal', 'true');
    popupEl.setAttribute('aria-hidden', 'true');
    popupEl.innerHTML =
      '<div class="eventup-marketing-popup__backdrop"></div>'
      + '<div class="eventup-marketing-popup__card">'
      + '<p class="eventup-marketing-popup__heading" data-marketing-heading>Introducing</p>'
      + '<div class="eventup-marketing-popup__logo-wrap">'
      + '<button type="button" class="eventup-marketing-popup__close" data-marketing-close aria-label="Close">'
      + '<span aria-hidden="true">&times;</span>'
      + '</button>'
      + '<img class="eventup-marketing-popup__logo" data-marketing-logo src="" alt="">'
      + '</div>'
      + '</div>';

    document.body.appendChild(popupEl);
    bindPopupEvents(popupEl);
    return popupEl;
  }

  function bindPopupEvents(popup) {
    if (!popup || popupBound) {
      return;
    }

    popupBound = true;

    var closeBtn = popup.querySelector('[data-marketing-close]');
    if (closeBtn) {
      closeBtn.addEventListener('click', hidePopup);
    }

    popup.addEventListener('click', function (event) {
      if (event.target === popup.querySelector('.eventup-marketing-popup__backdrop')) {
        hidePopup();
      }
    });

    document.addEventListener('keydown', function (event) {
      if (event.key === 'Escape' && popupEl && popupEl.classList.contains('is-visible')) {
        hidePopup();
      }
    });
  }

  function hidePreloader() {
    var preloader = document.getElementById('preloader');
    if (!preloader) {
      return;
    }

    preloader.style.display = 'none';
    preloader.style.visibility = 'hidden';
    preloader.style.opacity = '0';
  }

  function hidePopup() {
    if (!popupEl) {
      return;
    }

    if (autoCloseTimer) {
      window.clearTimeout(autoCloseTimer);
      autoCloseTimer = null;
    }

    popupEl.classList.remove('is-visible');
    popupEl.setAttribute('aria-hidden', 'true');
    document.body.classList.remove('eventup-marketing-popup-open');

    window.setTimeout(function () {
      if (popupEl) {
        popupEl.style.display = 'none';
      }
    }, 400);
  }

  function showPopup(config) {
    var popup = createPopup();
    var heading = popup.querySelector('[data-marketing-heading]');
    var logo = popup.querySelector('[data-marketing-logo]');
    var logoConfig = (config && config.logo) || {};
    var autoCloseMs = config && config.autoCloseDuration != null
      ? Number(config.autoCloseDuration)
      : 3000;

    if (heading) {
      heading.textContent = (config && config.heading) || 'Introducing';
    }

    if (logo) {
      logo.src = logoConfig.url || 'assets/img/novel-logo.png';
      logo.alt = logoConfig.alt || 'NOVEL';
    }

    hidePreloader();

    popup.style.display = 'flex';
    popup.setAttribute('aria-hidden', 'false');
    document.body.classList.add('eventup-marketing-popup-open');

    window.requestAnimationFrame(function () {
      popup.classList.add('is-visible');
      markShown();
    });

    if (autoCloseTimer) {
      window.clearTimeout(autoCloseTimer);
    }

    if (autoCloseMs > 0) {
      autoCloseTimer = window.setTimeout(hidePopup, autoCloseMs);
    }
  }

  function shouldShow(config) {
    if (!config || config.show === false) {
      return false;
    }

    if (config.showOncePerSession !== false) {
      try {
        if (window.sessionStorage.getItem('eventup-marketing-popup-v2') === '1') {
          return false;
        }
      } catch (error) {
        /* ignore */
      }
    }

    return true;
  }

  function markShown() {
    try {
      window.sessionStorage.setItem('eventup-marketing-popup-v2', '1');
    } catch (error) {
      /* ignore */
    }
  }

  function init(config) {
    if (!shouldShow(config)) {
      if (popupEl) {
        popupEl.style.display = 'none';
      }
      return;
    }

    function launch() {
      window.setTimeout(function () {
        showPopup(config);
      }, 150);
    }

    if (document.readyState === 'complete') {
      launch();
    } else {
      window.addEventListener('load', launch);
    }
  }

  window.EventUpMarketingPopup = {
    init: init,
    show: showPopup,
    hide: hidePopup
  };
})();