(function () {
  var PADDING_TOP = '40px';
  var PADDING_BOTTOM = '40px';
  var MARKER_TEXT = 'here for a reason';

  function buildCss() {
    return (
      '.container.footer {' +
      '  padding-top: var(--baseTemplateFooter-padding-top, ' + PADDING_TOP + ');' +
      '  padding-bottom: var(--baseTemplateFooter-padding-bottom, ' + PADDING_BOTTOM + ');' +
      '}' +
      '@media (min-width: 768px) {' +
      '#cartDivMobile {' +
      'display: none;' +
      '}' +
      '}' +
      '.baseTemplateFooterHidden {' +
      '  display: none !important;' +
      '}'
    );
  }

  function addStyleSheet(styles) {
    var stylesheet = document.createElement('style');
    stylesheet.setAttribute('data-basetemplate', 'footer-cleanup');
    stylesheet.appendChild(document.createTextNode(styles));
    document.head.appendChild(stylesheet);
  }

  function findMarkerComment(container) {
    var walker = document.createTreeWalker(container, NodeFilter.SHOW_COMMENT, null, false);
    var node;
    while ((node = walker.nextNode())) {
      if (node.nodeValue.indexOf(MARKER_TEXT) !== -1) return node;
    }
    return null;
  }

  function isBeforeMarker(node, marker) {
    if (!marker) return false;
    var position = node.compareDocumentPosition(marker);
    return !!(position & Node.DOCUMENT_POSITION_FOLLOWING);
  }

  function findCopyrightNode(container) {
    var walker = document.createTreeWalker(container, NodeFilter.SHOW_TEXT, null, false);
    var node;
    while ((node = walker.nextNode())) {
      if (node.nodeValue.indexOf('Copyright') !== -1) return node;
    }
    return null;
  }

  function findCreditLink(container, marker) {
    var links = Array.from(container.querySelectorAll('a.footer'));
    for (var i = 0; i < links.length; i++) {
      if (!isBeforeMarker(links[i], marker)) return links[i];
    }
    return null;
  }

  function isBetween(node, start, end) {
    if (!start || !end) return false;
    var afterStart = start.compareDocumentPosition(node) & Node.DOCUMENT_POSITION_FOLLOWING;
    var beforeEnd = node.compareDocumentPosition(end) & Node.DOCUMENT_POSITION_FOLLOWING;
    return !!(afterStart && beforeEnd);
  }

  function hideMenuLinks(container, marker) {
    var links = Array.from(container.querySelectorAll('a.footer'));
    links.forEach(function (link) {
      if (isBeforeMarker(link, marker)) {
        link.classList.add('baseTemplateFooterHidden');
      }
    });
  }

  function isPipeSeparator(text) {
    var nbsp = String.fromCharCode(160);
    var stripped = text.split(nbsp).join(' ').trim();
    return stripped === '' || stripped === '|';
  }

  function hidePipeCharacters(container, marker) {
    var nodes = Array.from(container.childNodes);
    nodes.forEach(function (node) {
      if (node.nodeType !== 3) return;
      if (!isBeforeMarker(node, marker)) return;
      if (!isPipeSeparator(node.nodeValue)) return;
      var span = document.createElement('span');
      span.className = 'baseTemplateFooterHidden';
      span.textContent = node.nodeValue;
      node.parentNode.replaceChild(span, node);
    });
  }

  function hideAllBreaks(container, copyrightNode, creditLink) {
    var breaks = Array.from(container.querySelectorAll('br'));
    breaks.forEach(function (br) {
      if (isBetween(br, copyrightNode, creditLink)) return; // keep this one
      br.classList.add('baseTemplateFooterHidden');
    });
  }

  function hideSpacerDiv(container) {
    var divs = Array.from(container.querySelectorAll('div'));
    divs.forEach(function (div) {
      var style = div.getAttribute('style') || '';
      if (style.indexOf('height: 10px') !== -1 || style.indexOf('height:10px') !== -1) {
        div.classList.add('baseTemplateFooterHidden');
      }
    });
  }

  function fixCopyrightYear(container) {
    var walker = document.createTreeWalker(container, NodeFilter.SHOW_TEXT, null, false);
    var node;
    while ((node = walker.nextNode())) {
      if (node.nodeValue.indexOf('Copyright') !== -1) {
        node.nodeValue = node.nodeValue
          .split('2007-').join('')
          .split('2007 - ').join('')
          .split('2007- ').join('')
          .split('2007 -').join('');
        break;
      }
    }
  }

  function run() {
    var container = document.querySelector('.container.footer');
    if (!container) return false;

    var marker = findMarkerComment(container);
    if (!marker) return false; // comment not found, abort entirely, don't touch anything

    var copyrightNode = findCopyrightNode(container);
    var creditLink = findCreditLink(container, marker);
    addStyleSheet(buildCss());
    hideMenuLinks(container, marker);
    hidePipeCharacters(container, marker);
    hideAllBreaks(container, copyrightNode, creditLink);
    hideSpacerDiv(container);
    fixCopyrightYear(container);
    return true;
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', run);
  } else {
    run();
  }
})();