(function() {
  'use strict';

  window.utils = window.utils || {};

  window.utils.modal = function(modal) {
    var overlay = document.createElement('div');
    var closer = document.createElement('div');
    var trigger = document.querySelector('#' + modal.dataset.trigger);
    // var origParent = modal.parentNode;

    function open(event) {
      // disable modals for narrow screens
      if (event) {
        event.preventDefault();
      }
      modal.classList.add('modal--open');
      overlay.classList.add('modal__overlay');
      // document.body.insertBefore(modal, null);
       document.body.insertBefore(overlay, modal);
      overlay.classList.add('modal__overlay--open');

      if ('closeable' in modal.dataset) {
        closer.classList.add('modal__closer');
        modal.insertBefore(closer, null);
        closer.addEventListener('click', close, false);
        overlay.addEventListener('click', close, false);
      }
    }

    // you can open this modal via event
    // example: document.dispatchEvent(new CustomEvent('modal-open', { details: { for: 'modal-[id]' }}))
    function openOnEvent(event) {
      if (event.detail.for === modal.getAttribute('id')) {
        open();
      }
    }

    function close(event) {
      if (typeof event === 'undefined' || event.target === closer || event.target === overlay) {
        overlay.remove();
        // origParent.insertBefore(modal, null);
        modal.classList.remove('modal--open');
        closer.removeEventListener('click', close, false);
      }
    };

    function setup() {
       document.body.insertBefore(modal, null);

      // every modal can be openend via document-wide event, see openOnEvent
      document.addEventListener('modal-open', openOnEvent, false);
      // if modal has trigger assigned to it open modal on click
      if (trigger) {
        trigger.classList.add('modal__trigger');
        trigger.addEventListener('click', open, false);
      }

      if ('dynamic' in modal.dataset) {
        var dynamicContentURL = trigger.getAttribute('href');

        var i = dynamicContentURL.indexOf('?');
        if (i === -1) {
          dynamicContentURL = dynamicContentURL + "?" + #{String modalParameter};
        } else {
          dynamicContentURL = dynamicContentURL.slice(0,i) + "?" + #{String modalParameter} + "&" + dynamicContentURL.slice(i + 1);
        }
        console.log(dynamicContentURL);

        if (dynamicContentURL.length > 0) {
          fetch(dynamicContentURL, {
            credentials: 'same-origin',
          }).then(function(response) {
            return response.text();
          }).then(function(body) {
            var modalContent = document.createElement('div');
            modalContent.classList.add('modal__content');
            modalContent.innerHTML = body;

            var contentBody = modalContent.querySelector('.main__content-body');
            var scriptTags = [];
            if (contentBody) {
              modalContent.querySelectorAll('script').forEach(function(scriptTag) {
                if (Array.from(document.body.querySelectorAll('script')).some(function(haystack) {
                  if (haystack.text === scriptTag.text && haystack.getAttribute('src') === scriptTag.getAttribute('src')) {
                    return true;
                  }
                  return false;
                })) { return }

                console.log(scriptTag);
                var scriptClone = document.createElement('script');
                if (scriptTag.text)
                  scriptClone.text = striptTag.text;
                if (scriptTag.hasAttributes()) {
                  var attrs = scriptTag.attributes;
                  for (var i = attrs.length - 1; i >= 0; i--) {
                    scriptClone.setAttribute(attrs[i].name, attrs[i].value);
                  }
                }
                  
                document.body.insertBefore(scriptClone, null);
                scriptTags.push(scriptClone);
              });

              modalContent.querySelectorAll('style').forEach(function(styleTag) {
                if (Array.from(document.head.querySelectorAll('style')).some(function(haystack) {
                  return haystack.innerText === styleTag.innerText;
                })) { return }
                  
                document.head.insertBefore(styleTag, null);
              });

              modalContent.querySelectorAll('link').forEach(function(linkTag) {
                if (linkTag.getAttribute('rel') !== 'stylesheet')
                  return;

                if (Array.from(document.head.querySelectorAll('link')).some(function(haystack) {
                  return haystack.getAttribute('href') === linkTag.getAttribute('href');
                })) { return }
                  
                  
                document.head.insertBefore(linkTag, null);
              });
                
              modalContent = contentBody;
            }
              
            var nudgeAttr = function(attr, x) {
              var oldVal = x.getAttribute(attr);
              var newVal = modal.getAttribute('id') + '__' + oldVal;

              // console.log(oldVal, newVal);
              x.setAttribute(attr, newVal); 
            };

            var idAttrs = ['id', 'for', 'data-conditional-id'];
            idAttrs.map(function(attr) {
              modalContent.querySelectorAll('[' + attr + ']').forEach(function(x) { nudgeAttr(attr, x); });
            });
              
            modal.appendChild(modalContent);

            var triggerContentLoad = function() {
              document.dispatchEvent(new CustomEvent('setup', {
                detail: { scope: modalContent },
                bubbles: true,
                cancelable: true
              }));
            }

            if (scriptTags.length !== 0) {
              scriptTags.forEach(function(t) { t.onload = triggerContentLoad; });
            }

            triggerContentLoad();
          });
        }
      }
      // tell further modals, that this one already got initialized
      modal.classList.add('js-modal-initialized');
    }
    setup();
  };
})();

document.addEventListener('setup', function(e) {

  Array.from(e.detail.scope.querySelectorAll('.js-modal:not(.js-modal-initialized)')).map(function(modal) {
    new utils.modal(modal);
  });

}, false);