/**
 * @file
 * Behaviors for the search widget in the admin toolbar.
 */

(function ($, Drupal) {

  'use strict';

  Drupal.behaviors.adminToolbarSearch = {

    // If extra links have been fetched.
    extraFetched: false,

    attach: function (context) {
      if (context != document) {
        return;
      }

      var $self = this;

      $('#toolbar-bar', context).once('admin-toolbar-search').each(function () {
        $self.links = [];

        var $searchTab = $(this).find('#admin-toolbar-search-tab')
        var $searchInput = $searchTab.find('#admin-toolbar-search-input');

        if ($searchInput.length === 0) {
          return;
        }

        $searchInput.autocomplete({
          minLength: 2,
          position: { collision : 'fit' },
          source: function (request, response) {
            var data = $self.handleAutocomplete(request.term);
            if (!$self.extraFetched && drupalSettings.adminToolbarSearch.loadExtraLinks) {
              $.getJSON( Drupal.url('admin/admin-toolbar-search'), function ( data ) {
                $(data).each(function () {
                  var item = this;
                  item.label = this.labelRaw + ' ' + this.value;
                  $self.links.push(item);
                });

                $self.extraFetched = true;

                var results = $self.handleAutocomplete(request.term);
                response(results);
              });
            }
            else {
              response(data);
            }
          },
          open: function () {
            var zIndex = $('#toolbar-item-administration-tray')
              .css('z-index') + 1;
            $(this).autocomplete('widget').css('z-index', zIndex);

            return false;
          },
          select: function (event, ui) {
            if (ui.item.value) {
              location.href = ui.item.value;
              return false;
            }
          }
        }).data('ui-autocomplete')._renderItem = (function (ul, item) {
          ul.addClass('admin-toolbar-search-autocomplete-list');
          return $('<li>')
            .append('<div>' + item.labelRaw + ' <span class="admin-toolbar-search-url">' + item.value + '</span></div>')
            .appendTo(ul);
        });

        // Populate the links for search results when the input is pressed.
        $searchInput.focus(function () {
          Drupal.behaviors.adminToolbarSearch.populateLinks($self);
        });

        // Show/hide search input field when mobile tab item is pressed.
        $('#admin-toolbar-mobile-search-tab .toolbar-item', context).click(function (e) {
          e.preventDefault();
          $(this).toggleClass('is-active');
          $searchTab.toggleClass('visible');
          $searchInput.focus();
        });
      });
    },
    getItemLabel: function (item) {
      var breadcrumbs = [];
      $(item).parents().each(function () {
        if ($(this).hasClass('menu-item')) {
          var $link = $(this).find('a:first');
          if ($link.length && !$link.hasClass('admin-toolbar-search-ignore')) {
            breadcrumbs.unshift($link.text());
          }
        }
      });
      return breadcrumbs.join(' > ');
    },
    handleAutocomplete: function (term) {
      var $self = this;
      var keywords = term.split(" "); // Split search terms into list.

      var suggestions = [];
      $self.links.forEach(function (element) {
        var label = element.label.toLowerCase();

        // Add exact matches.
        if (label.indexOf(term.toLowerCase()) >= 0) {
          suggestions.push(element);
        }
        else {
          // Add suggestions where it matches all search terms.
          var matchCount = 0;
          keywords.forEach(function (keyword) {
            if (label.indexOf(keyword.toLowerCase()) >= 0) {
              matchCount++;
            }
          });
          if (matchCount == keywords.length) {
            suggestions.push(element);
          }
        }
      });
      return suggestions;
    },
    /**
     * Populates the links in admin toolbar search.
     */
    populateLinks: function ($self) {
      // Populate only when links array is empty (only the first time).
      if ($self.links.length === 0) {
        var getUrl = window.location;
        var baseUrl = getUrl.protocol + "//" + getUrl.host + "/";
        $('.toolbar-tray a[data-drupal-link-system-path]').each(function () {
          if (this.href !== baseUrl) {
            var label = $self.getItemLabel(this);
            $self.links.push({
              'value': this.href,
              'label': label + ' ' + this.href,
              'labelRaw': Drupal.checkPlain(label)
            });
          }
        });
      }
    },
  };

})(jQuery, Drupal);
