/*global VuFind */
/*exported cartFormHandler */

VuFind.register('cart', function Cart() {
  var _COOKIE = 'vufind_cart';
  var _COOKIE_SOURCES = 'vufind_cart_src';
  var _COOKIE_DELIM = "\t";
  var _COOKIE_DOMAIN = false;
  var _COOKIE_PATH = '/';
  var _COOKIE_SAMESITE = 'Lax';

  function setDomain(domain) {
    _COOKIE_DOMAIN = domain;
  }

  function setCookiePath(path) {
    _COOKIE_PATH = path;
  }

  function setCookieSameSite(sameSite) {
    _COOKIE_SAMESITE = sameSite;
  }

  function _getCookieParams() {
    return { path: _COOKIE_PATH, domain: _COOKIE_DOMAIN, SameSite: _COOKIE_SAMESITE };
  }

  function _uniqueArray(op) {
    var ret = [];
    for (var i = 0; i < op.length; i++) {
      if (ret.indexOf(op[i]) < 0) {
        ret.push(op[i]);
      }
    }
    return ret;
  }

  function _getItems() {
    var items = window.Cookies.get(_COOKIE);
    if (items) {
      return items.split(_COOKIE_DELIM);
    }
    return [];
  }
  function _getSources() {
    var items = window.Cookies.get(_COOKIE_SOURCES);
    if (items) {
      return items.split(_COOKIE_DELIM);
    }
    return [];
  }
  function getFullItems() {
    var items = _getItems();
    var sources = _getSources();
    var full = [];
    if (items.length === 0) {
      return [];
    }
    for (var i = items.length; i--;) {
      full[full.length] = sources[items[i].charCodeAt(0) - 65] + '|' + items[i].substr(1);
    }
    return full;
  }

  function hasItem(id, _source) {
    var source = _source || VuFind.defaultSearchBackend;
    return _getItems().indexOf(String.fromCharCode(65 + _getSources().indexOf(source)) + id) > -1;
  }

  function _refreshToggles() {
    var $toggleBtns = $('.btn-bookbag-toggle');
    if ($toggleBtns.length > 0) {
      $toggleBtns.each(function cartIdEach() {
        var $this = $(this);
        $this.find('.cart-add,.cart-remove').addClass('hidden');
        if (hasItem($this.data('cart-id'), $this.data('cart-source'))) {
          $this.find('.cart-remove').removeClass('hidden');
        } else {
          $this.find('.cart-add').removeClass('hidden');
        }
      });
    }
  }

  function updateCount() {
    var items = VuFind.cart.getFullItems();
    $('#cartItems strong').html(items.length);
    if (items.length === parseInt(VuFind.translate('bookbagMax'), 10)) {
      $('#cartItems .full').removeClass('hidden');
    } else {
      $('#cartItems .full').addClass('hidden');
    }
    _refreshToggles();
  }

  function addItem(id, _source) {
    var source = _source || VuFind.defaultSearchBackend;
    var cartItems = _getItems();
    var cartSources = _getSources();
    if (cartItems.length >= parseInt(VuFind.translate('bookbagMax'), 10)) {
      return false;
    }
    var sIndex = cartSources.indexOf(source);
    if (sIndex < 0) {
      // Add source to source cookie
      cartItems[cartItems.length] = String.fromCharCode(65 + cartSources.length) + id;
      cartSources[cartSources.length] = source;
      window.Cookies.set(_COOKIE_SOURCES, cartSources.join(_COOKIE_DELIM), _getCookieParams());
    } else {
      cartItems[cartItems.length] = String.fromCharCode(65 + sIndex) + id;
    }
    window.Cookies.set(_COOKIE, _uniqueArray(cartItems).join(_COOKIE_DELIM), _getCookieParams());
    updateCount();
    return true;
  }
  function removeItem(id, source) {
    var cartItems = _getItems();
    var cartSources = _getSources();
    // Find
    var cartIndex = cartItems.indexOf(String.fromCharCode(65 + cartSources.indexOf(source)) + id);
    if (cartIndex > -1) {
      var sourceIndex = cartItems[cartIndex].charCodeAt(0) - 65;
      var saveSource = false;
      for (var i = cartItems.length; i--;) {
        if (i === cartIndex) {
          continue;
        }
        // If this source is shared by another, keep it
        if (cartItems[i].charCodeAt(0) - 65 === sourceIndex) {
          saveSource = true;
          break;
        }
      }
      cartItems.splice(cartIndex, 1);
      // Remove unused sources
      if (!saveSource) {
        var oldSources = cartSources.slice(0);
        cartSources.splice(sourceIndex, 1);
        // Adjust source index characters
        for (var j = cartItems.length; j--;) {
          var si = cartItems[j].charCodeAt(0) - 65;
          var ni = cartSources.indexOf(oldSources[si]);
          cartItems[j] = String.fromCharCode(65 + ni) + cartItems[j].substring(1);
        }
      }
      if (cartItems.length > 0) {
        window.Cookies.set(_COOKIE, _uniqueArray(cartItems).join(_COOKIE_DELIM), _getCookieParams());
        window.Cookies.set(_COOKIE_SOURCES, _uniqueArray(cartSources).join(_COOKIE_DELIM), _getCookieParams());
      } else {
        window.Cookies.remove(_COOKIE, _getCookieParams());
        window.Cookies.remove(_COOKIE_SOURCES, _getCookieParams());
      }
      updateCount();
      return true;
    }
    return false;
  }

  var _cartNotificationTimeout = false;
  function _registerUpdate(_form) {
    var $form = typeof _form === 'undefined'
      ? $('form[name="bulkActionForm"]')
      : $(_form);
    $("#updateCart, #bottom_updateCart").off("click").on("click", function cartUpdate() {
      var elId = this.id;
      var selected = VuFind.listItemSelection.getAllSelected($form[0]);
      if (selected.length > 0) {
        var orig = getFullItems();
        $(selected).each(function cartCheckedItemsAdd() {
          var data = this.split('|');
          addItem(data[1], data[0]);
        });
        var updated = getFullItems();
        var added = updated.length - orig.length;
        var inCart = selected.length - added;
        var msgs = [
          VuFind.translate('itemsAddBag', {'%%count%%': added})
        ];
        if (updated.length >= parseInt(VuFind.translate('bookbagMax'), 10)) {
          msgs.push(VuFind.translate('bookbagFull'));
        }
        if (inCart > 0 && orig.length > 0) {
          msgs.push(VuFind.translate('itemsInBag', {'%%count%%': inCart}));
        }
        var msg = '';
        if (msgs.length > 1) {
          var ul = document.createElement('ul');
          msgs.forEach((current) => {
            var li = document.createElement('li');
            li.innerHTML = current;
            ul.appendChild(li);
          });
          msg = ul.outerHTML;
        } else {
          msg = msgs.pop();
        }
        $('#' + elId).data('bs.popover').options.content = msg;
        $('#cartItems strong').html(updated.length);
      } else {
        $('#' + elId).data('bs.popover').options.content = VuFind.translate('bulk_noitems_advice');
      }
      $('#' + elId).popover('show');
      if (_cartNotificationTimeout !== false) {
        clearTimeout(_cartNotificationTimeout);
      }
      _cartNotificationTimeout = setTimeout(function notificationHide() {
        $('#' + elId).popover('hide');
      }, 5000);
      return false;
    });
  }

  function registerToggles(_container) {
    var container = typeof _container !== 'undefined' ? $(_container) : $(document);
    var $toggleBtns = container.find('.btn-bookbag-toggle');
    if ($toggleBtns.length > 0) {
      $toggleBtns.each(function cartIdEach() {
        var $this = $(this);
        var currentId = $this.data('cart-id');
        var currentSource = $this.data('cart-source');
        $this.find('.correct').removeClass('correct hidden');
        $this.find('.cart-add').on('click', function cartAddClick(e) {
          e.preventDefault();
          if (addItem(currentId, currentSource)) {
            $this.find('.cart-add').addClass('hidden');
            $this.find('.cart-remove').removeClass('hidden').trigger('focus');
          } else {
            $this.popover({
              title: VuFind.translate('bookbag'),
              content: VuFind.translate('bookbagFull')
            });
            setTimeout(function recordCartFullHide() {
              $this.popover('hide');
            }, 5000);
          }
        });
        $this.find('.cart-remove').on('click', function cartRemoveClick(e) {
          e.preventDefault();
          removeItem(currentId, currentSource);
          $this.find('.cart-add').removeClass('hidden').trigger('focus');
          $this.find('.cart-remove').addClass('hidden');
        });
      });
    }
  }

  function updateContainer(params) {
    registerToggles(params.container);
  }

  function init() {
    // Record buttons
    registerToggles();
    // Search results
    _registerUpdate();
    $("#updateCart, #bottom_updateCart").popover({
      title: VuFind.translate('bookbag'),
      content: '',
      html: true,
      trigger: 'manual',
      placement: $(document.body).hasClass('rtl') ? 'left' : 'right'
    });
    updateCount();
    VuFind.listen('results-init', updateContainer);
  }

  // Reveal
  return {
    // Methods
    addItem: addItem,
    getFullItems: getFullItems,
    hasItem: hasItem,
    removeItem: removeItem,
    setCookiePath: setCookiePath,
    setCookieSameSite: setCookieSameSite,
    setDomain: setDomain,
    updateCount: updateCount,
    // Init
    init: init,
    registerToggles: registerToggles
  };
});

// Building an array and checking indexes prevents a race situation
// We want to prioritize empty over printing
function cartFormHandler(event, data) {
  let numberOfItems = 0;
  let isPrint = false;
  for (let i in data) {
    if (Object.prototype.hasOwnProperty.call(data, i)) {
      if (data[i].name === 'ids[]') {
        numberOfItems++;
      }
      if (data[i].name === 'print') {
        isPrint = true;
      }
    }
  }
  if (event.originalEvent !== undefined) {
    let itemLimit = event.originalEvent.submitter.dataset.itemLimit;
    if (numberOfItems < 1 || numberOfItems > itemLimit) {
      return null;
    }
  }

  if (isPrint) {
    return true;
  }
}

VuFind.listen('lightbox.closed', VuFind.cart.updateCount);