/*
 * jQuery Foundation Top Bar 2.0.1
 * http://foundation.zurb.com
 * Copyright 2012, ZURB
 * Free to use under the MIT license.
 * http://www.opensource.org/licenses/mit-license.php
*/

/*jslint unparam: true, browser: true, indent: 2 */

;(function ($, window, undefined) {
  'use strict';

  var settings = {
      index : 0,
      initialized : false
    },
    methods = {
      init : function (options) {
        return this.each(function () {
          settings = $.extend(settings, options);
          settings.$w = $(window),
          settings.$topbar = $('nav.top-bar');
          settings.$titlebar = settings.$topbar.children('ul:first');
          var breakpoint = $("<div class='top-bar-js-breakpoint'/>").appendTo("body");
          settings.breakPoint = breakpoint.width();
          breakpoint.remove();

          if (!settings.initialized) {
            methods.assemble();
            settings.initialized = true;
          }

          if (!settings.height) {
            methods.largestUL();
          }

          if (settings.$topbar.parent().hasClass('fixed')) {
            $('body').css('padding-top',settings.$topbar.outerHeight())
          }

          $('.top-bar .toggle-topbar').die('click.fndtn').live('click.fndtn', function (e) {
            e.preventDefault();

            if (methods.breakpoint()) {
              settings.$topbar.toggleClass('expanded');
              settings.$topbar.css('min-height', '');
            }
          });

          // Show the Dropdown Levels on Click
          $('.top-bar .has-dropdown>a').die('click.fndtn').live('click.fndtn', function (e) {
            if (Modernizr.touch || methods.breakpoint())
              e.preventDefault();

            if (methods.breakpoint()) {
              var $this = $(this),
                  $selectedLi = $this.closest('li'),
                  $nextLevelUl = $selectedLi.children('ul'),
                  $section = $this.closest('section'),
                  $nextLevelUlHeight = 0,
                  $largestUl;

              settings.index += 1;
              $selectedLi.addClass('moved');
              $section.css({'left': -(100 * settings.index) + '%'});
              $section.find('>.name').css({'left': 100 * settings.index + '%'});

              $this.siblings('ul').height(settings.height + settings.$titlebar.outerHeight(true));
              settings.$topbar.css('min-height', settings.height + settings.$titlebar.outerHeight(true) * 2)
            }
          });

          $(window).on('resize.fndtn.topbar',function() {
            if (!methods.breakpoint()) {
              settings.$topbar.css('min-height', '');
            }
          });

          // Go up a level on Click
          $('.top-bar .has-dropdown .back').die('click.fndtn').live('click.fndtn', function (e) {
            e.preventDefault();

            var $this = $(this),
              $movedLi = $this.closest('li.moved'),
              $section = $this.closest('section'),
              $previousLevelUl = $movedLi.parent();

            settings.index -= 1;
            $section.css({'left': -(100 * settings.index) + '%'});
            $section.find('>.name').css({'left': 100 * settings.index + '%'});

            if (settings.index === 0) {
              settings.$topbar.css('min-height', 0);
            }

            setTimeout(function () {
              $movedLi.removeClass('moved');
            }, 300);
          });
        });
      },
      breakpoint : function () {
        return settings.$w.width() < settings.breakPoint;
      },
      assemble : function () {
        var $section = settings.$topbar.children('section');

        // Pull element out of the DOM for manipulation
        $section.detach();

        $section.find('.has-dropdown>a').each(function () {
          var $link = $(this),
              $dropdown = $link.siblings('.dropdown'),
              $titleLi = $('<li class="title back js-generated"><h5><a href="#"></a></h5></li>');

          // Copy link to subnav
          $titleLi.find('h5>a').html($link.html());
          $dropdown.prepend($titleLi);
        });

        // Put element back in the DOM
        $section.appendTo(settings.$topbar);
      },
      largestUL : function () {
        var uls = settings.$topbar.find('section ul ul'),
            largest = uls.first(),
            total = 0;

        uls.each(function () {
          if ($(this).children('li').length > largest.children('li').length) {
            largest = $(this);
          }
        });

        largest.children('li').each(function () { total += $(this).outerHeight(true); });

        settings.height = total;
      }
    };

  $.fn.foundationTopBar = function (method) {
    if (methods[method]) {
      return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
    } else if (typeof method === 'object' || !method) {
      return methods.init.apply(this, arguments);
    } else {
      $.error('Method ' +  method + ' does not exist on jQuery.foundationTopBar');
    }
  };

}(jQuery, this));
