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!function($) {
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    var Selectpicker = function(element, options, e) {
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        if (e ) {
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            e.stopPropagation();
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            e.preventDefault();
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        }
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        this.$element = $(element);
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        this.$newElement = null;
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        this.button = null;
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        //Merge defaults, options and data-attributes to make our options
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        this.options = $.extend({}, $.fn.selectpicker.defaults, this.$element.data(), typeof options == 'object' && options);
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        //If we have no title yet, check the attribute 'title' (this is missed by jq as its not a data-attribute
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        if(this.options.title==null)
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            this.options.title = this.$element.attr('title');
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        //Expose public methods
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        this.val = Selectpicker.prototype.val;
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        this.render = Selectpicker.prototype.render;
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        this.init();
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    };
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    Selectpicker.prototype = {
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        constructor: Selectpicker,
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        init: function (e) {
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            var _this = this;
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            this.$element.hide();
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            this.multiple = this.$element.prop('multiple');
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            var classList = this.$element.attr('class') !== undefined ? this.$element.attr('class').split(/\s+/) : '';
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            var id = this.$element.attr('id');
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            this.$element.after( this.createView() );
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            this.$newElement = this.$element.next('.select');
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            var select = this.$newElement;
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            var menu = this.$newElement.find('.dropdown-menu');
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            var menuArrow = this.$newElement.find('.dropdown-arrow');
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            var menuA = menu.find('li > a');
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            var liHeight = select.addClass('open').find('.dropdown-menu li > a').outerHeight();
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            select.removeClass('open');
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            var divHeight = menu.find('li .divider').outerHeight(true);
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            var selectOffset_top = this.$newElement.offset().top;
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            var size = 0;
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            var menuHeight = 0;
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            var selectHeight = this.$newElement.outerHeight();
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            this.button = this.$newElement.find('> button');
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            if (id !== undefined) {
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                this.button.attr('id', id);
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                $('label[for="' + id + '"]').click(function(){ select.find('button#'+id).focus(); })
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            }
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            for (var i = 0; i < classList.length; i++) {
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                if(classList[i] != 'selectpicker') {
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                    this.$newElement.addClass(classList[i]);
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                }
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            }
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            //If we are multiple, then add the show-tick class by default
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            if(this.multiple) {
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                 this.$newElement.addClass('select-multiple');
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            }
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            this.button.addClass(this.options.style);
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            menu.addClass(this.options.menuStyle);
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            menuArrow.addClass(function() {
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                if (_this.options.menuStyle) {
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                    return _this.options.menuStyle.replace('dropdown-', 'dropdown-arrow-');
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                }
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            });
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            this.checkDisabled();
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            this.checkTabIndex();
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            this.clickListener();
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            var menuPadding = parseInt(menu.css('padding-top')) + parseInt(menu.css('padding-bottom')) + parseInt(menu.css('border-top-width')) + parseInt(menu.css('border-bottom-width'));
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            if (this.options.size == 'auto') {
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                function getSize() {
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                    var selectOffset_top_scroll = selectOffset_top - $(window).scrollTop();
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                    var windowHeight = $(window).innerHeight();
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                    var menuExtras = menuPadding + parseInt(menu.css('margin-top')) + parseInt(menu.css('margin-bottom')) + 2;
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                    var selectOffset_bot = windowHeight - selectOffset_top_scroll - selectHeight - menuExtras;
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                    menuHeight = selectOffset_bot;
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                    if (select.hasClass('dropup')) {
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                        menuHeight = selectOffset_top_scroll - menuExtras;
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                    }
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                    menu.css({'max-height' : menuHeight + 'px', 'overflow-y' : 'auto', 'min-height' : liHeight*3 + 'px'});
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            }
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                getSize();
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                $(window).resize(getSize);
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                $(window).scroll(getSize);
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                if (window.MutationObserver) {
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                    new MutationObserver(getSize).observe(this.$element.get(0), {
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                        childList: true
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                    });
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                } else {
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                    this.$element.bind('DOMNodeInserted', getSize);
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                }
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            } else if (this.options.size && this.options.size != 'auto' && menu.find('li').length > this.options.size) {
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                var optIndex = menu.find("li > *").filter(':not(.divider)').slice(0,this.options.size).last().parent().index();
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                var divLength = menu.find("li").slice(0,optIndex + 1).find('.divider').length;
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                menuHeight = liHeight*this.options.size + divLength*divHeight + menuPadding;
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                menu.css({'max-height' : menuHeight + 'px', 'overflow-y' : 'scroll'});
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            }
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            // Listen for updates to the DOM and re render... (Use Mutation Observer when availiable)
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            if (window.MutationObserver) {
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                new MutationObserver($.proxy(this.reloadLi, this)).observe(this.$element.get(0), {
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                    childList: true
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                });
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            } else {
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                this.$element.bind('DOMNodeInserted', $.proxy(this.reloadLi, this));
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            }
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            this.render();
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        },
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        createDropdown: function() {
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            var drop =
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                "<div class='btn-group select'>" +                    
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                    "<button class='btn dropdown-toggle clearfix' data-toggle='dropdown'>" +
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                        "<span class='filter-option pull-left'></span>&nbsp;" +
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                        "<span class='caret'></span>" +
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                    "</button>" +
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                    "<span class='dropdown-arrow'></span>" +
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                    "<ul class='dropdown-menu' role='menu'>" +
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                    "</ul>" +
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                "</div>";
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            return $(drop);
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        },
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        createView: function() {
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            var $drop = this.createDropdown();
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            var $li = this.createLi();
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            $drop.find('ul').append($li);
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            return $drop;
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        },
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        reloadLi: function() {
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            //Remove all children.
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            this.destroyLi();
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            //Re build
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            $li = this.createLi();
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            this.$newElement.find('ul').append( $li );
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            //render view
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            this.render();
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        },
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        destroyLi:function() {
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            this.$newElement.find('li').remove();
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        },
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        createLi: function() {
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            var _this = this;
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            var _li = [];
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            var _liA = [];
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            var _liHtml = '';
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            this.$element.find('option').each(function(){
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                _li.push($(this).text());
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            });
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            this.$element.find('option').each(function(index) {
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                //Get the class and text for the option
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                var optionClass = $(this).attr("class") !== undefined ? $(this).attr("class") : '';
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               	var text =  $(this).text();
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               	var subtext = $(this).data('subtext') !== undefined ? '<small class="muted">'+$(this).data('subtext')+'</small>' : '';
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                //Append any subtext to the main text.
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                text+=subtext;
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                if ($(this).parent().is('optgroup') && $(this).data('divider') != true) {
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                    if ($(this).index() == 0) {
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                        //Get the opt group label
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                        var label = $(this).parent().attr('label');
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                        var labelSubtext = $(this).parent().data('subtext') !== undefined ? '<small class="muted">'+$(this).parent().data('subtext')+'</small>' : '';
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                        label += labelSubtext;
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                        if ($(this)[0].index != 0) {
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                            _liA.push(
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                                '<div class="divider"></div>'+
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                                '<dt>'+label+'</dt>'+ 
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                                _this.createA(text, "opt " + optionClass )
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                                );
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                        } else {
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                            _liA.push(
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                                '<dt>'+label+'</dt>'+ 
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                                _this.createA(text, "opt " + optionClass ));
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                        }
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                    } else {
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                         _liA.push( _this.createA(text, "opt " + optionClass )  );
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                    }
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                } else if ($(this).data('divider') == true) {
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                    _liA.push('<div class="divider"></div>');
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                } else if ($(this).data('hidden') == true) {
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	                _liA.push('');
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                } else {
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                    _liA.push( _this.createA(text, optionClass ) );
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                }
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            });
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            if (_li.length > 0) {
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                for (var i = 0; i < _li.length; i++) {
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                    var $option = this.$element.find('option').eq(i);
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                    _liHtml += "<li rel=" + i + ">" + _liA[i] + "</li>";
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                }
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            }
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            //If we dont have a selected item, and we dont have a title, select the first element so something is set in the button
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            if(this.$element.find('option:selected').length==0 && !_this.options.title) {
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                this.$element.find('option').eq(0).prop('selected', true).attr('selected', 'selected');
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            }
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            return $(_liHtml);
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        },
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        createA:function(test, classes) {
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         return '<a tabindex="-1" href="#" class="'+classes+'">' +
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                 '<span class="pull-left">' + test + '</span>' +
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                 '</a>';
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        },
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         render:function() {
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            var _this = this;
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            //Set width of select
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             if (this.options.width == 'auto') {
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                 var ulWidth = this.$newElement.find('.dropdown-menu').css('width');
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                 this.$newElement.css('width',ulWidth);
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             } else if (this.options.width && this.options.width != 'auto') {
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                 this.$newElement.css('width',this.options.width);
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             }
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            //Update the LI to match the SELECT
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            this.$element.find('option').each(function(index) {
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               _this.setDisabled(index, $(this).is(':disabled') || $(this).parent().is(':disabled') );
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               _this.setSelected(index, $(this).is(':selected') );
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            });
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            var selectedItems = this.$element.find('option:selected').map(function(index,value) {
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                if($(this).attr('title')!=undefined) {
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                    return $(this).attr('title');
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                } else {
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                    return $(this).text();
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                }
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            }).toArray();
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            //Convert all the values into a comma delimited string    
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            var title = selectedItems.join(", ");
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            //If this is multi select, and the selectText type is count, the show 1 of 2 selected etc..                    
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            if(_this.multiple && _this.options.selectedTextFormat.indexOf('count') > -1) {
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                var max = _this.options.selectedTextFormat.split(">");
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                if( (max.length>1 && selectedItems.length > max[1]) || (max.length==1 && selectedItems.length>=2)) {
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                    title = selectedItems.length +' of ' + this.$element.find('option').length + ' selected';
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                }
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             }  
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            //If we dont have a title, then use the default, or if nothing is set at all, use the not selected text
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            if(!title) {
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                title = _this.options.title != undefined ? _this.options.title : _this.options.noneSelectedText;    
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            }
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            this.$element.next('.select').find('.filter-option').html( title );
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	    },
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        setSelected:function(index, selected) {
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            if(selected) {
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                this.$newElement.find('li').eq(index).addClass('selected');
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            } else {
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                this.$newElement.find('li').eq(index).removeClass('selected');
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            }
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        },
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        setDisabled:function(index, disabled) {
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            if(disabled) {
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                this.$newElement.find('li').eq(index).addClass('disabled');
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            } else {
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                this.$newElement.find('li').eq(index).removeClass('disabled');
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            }
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        },
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        checkDisabled: function() {
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            if (this.$element.is(':disabled')) {
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                this.button.addClass('disabled');
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                this.button.click(function(e) {
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                    e.preventDefault();
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                });
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            }
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        },
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		checkTabIndex: function() {
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			if (this.$element.is('[tabindex]')) {
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				var tabindex = this.$element.attr("tabindex");
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				this.button.attr('tabindex', tabindex);
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			}
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		},
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		clickListener: function() {
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            var _this = this;
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            $('body').on('touchstart.dropdown', '.dropdown-menu', function (e) { e.stopPropagation(); });
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            this.$newElement.on('click', 'li a', function(e){
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                var clickedIndex = $(this).parent().index(),
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                    $this = $(this).parent(),
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                    $select = $this.parents('.select');
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                //Dont close on multi choice menu    
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                if(_this.multiple) {
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                    e.stopPropagation();
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                }
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                e.preventDefault();
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                //Dont run if we have been disabled
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                if ($select.prev('select').not(':disabled') && !$(this).parent().hasClass('disabled')){
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                    //Deselect all others if not multi select box
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                    if (!_this.multiple) {
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                        $select.prev('select').find('option').removeAttr('selected');
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                        $select.prev('select').find('option').eq(clickedIndex).prop('selected', true).attr('selected', 'selected');
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                    } 
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                    //Else toggle the one we have chosen if we are multi selet.
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                    else {
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                        var selected = $select.prev('select').find('option').eq(clickedIndex).prop('selected');
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                        if(selected) {
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                            $select.prev('select').find('option').eq(clickedIndex).removeAttr('selected');
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                        } else {
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                            $select.prev('select').find('option').eq(clickedIndex).prop('selected', true).attr('selected', 'selected');
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                        }
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                    }
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                    $select.find('.filter-option').html($this.text());
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                    $select.find('button').focus();
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                    // Trigger select 'change'
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                    $select.prev('select').trigger('change');
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                }
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            });
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           this.$newElement.on('click', 'li.disabled a, li dt, li .divider', function(e) {
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                e.preventDefault();
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                e.stopPropagation();
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                $select = $(this).parent().parents('.select');
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                $select.find('button').focus();
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            });
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            this.$element.on('change', function(e) {
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                _this.render();
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            });
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        },
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        val:function(value) {
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            if(value!=undefined) {
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                this.$element.val( value );
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                this.$element.trigger('change');
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                return this.$element;
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            } else {
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                return this.$element.val();
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            }
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        }
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    };
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    $.fn.selectpicker = function(option, event) {
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       //get the args of the outer function..
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       var args = arguments;
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       var value;
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       var chain = this.each(function () {
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            var $this = $(this),
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                data = $this.data('selectpicker'),
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                options = typeof option == 'object' && option;
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            if (!data) {
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            	$this.data('selectpicker', (data = new Selectpicker(this, options, event)));
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            } else {
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            	for(var i in option) {
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            		data[i]=option[i];
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            	}
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            }
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            if (typeof option == 'string') {
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                //Copy the value of option, as once we shift the arguments
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                //it also shifts the value of option.
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                property = option;
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                if(data[property] instanceof Function) {
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                    [].shift.apply(args);
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                    value = data[property].apply(data, args);
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                } else {
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                    value = data[property];
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                }
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            }
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        });
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        if(value!=undefined) {
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            return value;
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        } else {
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            return chain;
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        } 
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    };
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    $.fn.selectpicker.defaults = {
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        style: null,
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        size: 'auto',
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        title: null,
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        selectedTextFormat : 'values',
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        noneSelectedText : 'Nothing selected',
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        width: null,
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        menuStyle: null,
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        toggleSize: null
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    }
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}(window.jQuery);
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