/*
 * Copyright 2005-2018 The Kuali Foundation
 *
 * Licensed under the Educational Community License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.opensource.org/licenses/ecl2.php
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
!function($) {

    'use strict';

    $.expr[':'].icontains = function(obj, index, meta) {
        return $(obj).text().toUpperCase().indexOf(meta[3].toUpperCase()) >= 0;
    };

    var Selectpicker = function(element, options, e) {
        if (e) {
            e.stopPropagation();
            e.preventDefault();
        }
        this.$element = $(element);
        this.$newElement = null;
        this.$button = null;
        this.$menu = null;
        this.$lis = null;

        //Merge defaults, options and data-attributes to make our options
        this.options = $.extend({}, $.fn.selectpicker.defaults, this.$element.data(), typeof options == 'object' && options);

        //If we have no title yet, check the attribute 'title' (this is missed by jq as its not a data-attribute
        if (this.options.title === null) {
            this.options.title = this.$element.attr('title');
        }

        //Expose public methods
        this.val = Selectpicker.prototype.val;
        this.render = Selectpicker.prototype.render;
        this.refresh = Selectpicker.prototype.refresh;
        this.setStyle = Selectpicker.prototype.setStyle;
        this.selectAll = Selectpicker.prototype.selectAll;
        this.deselectAll = Selectpicker.prototype.deselectAll;
        this.init();
    };

    Selectpicker.prototype = {

        constructor: Selectpicker,

        init: function() {
            var that = this,
                    id = this.$element.attr('id');

            this.$element.hide();
            this.multiple = this.$element.prop('multiple');
            this.autofocus = this.$element.prop('autofocus');
            this.$newElement = this.createView();
            this.$element.after(this.$newElement);
            this.$menu = this.$newElement.find('> .dropdown-menu');
            this.$button = this.$newElement.find('> button');
            this.$searchbox = this.$newElement.find('input');

            if (id !== undefined) {
                this.$button.attr('data-id', id);
                $('label[for="' + id + '"]').click(function(e) {
                    e.preventDefault();
                    that.$button.focus();
                });
            }

            this.checkDisabled();
            this.clickListener();
            if (this.options.liveSearch) this.liveSearchListener();
            this.render();
            this.liHeight();
            this.setStyle();
            this.setWidth();
            if (this.options.container) this.selectPosition();
            this.$menu.data('this', this);
            this.$newElement.data('this', this);
        },

        createDropdown: function() {
            //If we are multiple, then add the show-tick class by default
            var multiple = this.multiple ? ' show-tick' : '';
            var inputGroup = this.$element.parent().hasClass('input-group') ? ' input-group-btn' : '';
            var autofocus = this.autofocus ? ' autofocus' : '';
            var header = this.options.header ? '<div class="popover-title"><button type="button" class="close" aria-hidden="true">&times;</button>' + this.options.header + '</div>' : '';
            var searchbox = this.options.liveSearch ? '<div class="bootstrap-select-searchbox"><input type="text" class="input-block-level form-control" /></div>' : '';
            var actionsbox = this.options.actionsBox ? '<div class="bs-actionsbox">' +
                    '<div class="btn-group btn-block">' +
                    '<button class="actions-btn bs-select-all btn btn-sm btn-default">' +
                    'Select All' +
                    '</button>' +
                    '<button class="actions-btn bs-deselect-all btn btn-sm btn-default">' +
                    'Deselect All' +
                    '</button>' +
                    '</div>' +
                    '</div>' : '';
            var drop =
                    '<div class="btn-group bootstrap-select' + multiple + inputGroup + '">' +
                            '<button type="button" class="btn dropdown-toggle selectpicker" data-toggle="dropdown"'+ autofocus +'>' +
                            '<span class="filter-option pull-left"></span>&nbsp;' +
                            '<span class="caret"></span>' +
                            '</button>' +
                            '<div class="dropdown-menu open">' +
                            header +
                            searchbox +
                            actionsbox +
                            '<ul class="dropdown-menu inner selectpicker" role="menu">' +
                            '</ul>' +
                            '</div>' +
                            '</div>';

            return $(drop);
        },

        createView: function() {
            var $drop = this.createDropdown();
            var $li = this.createLi();
            $drop.find('ul').append($li);
            return $drop;
        },

        reloadLi: function() {
            //Remove all children.
            this.destroyLi();
            //Re build
            var $li = this.createLi();
            this.$menu.find('ul').append( $li );
        },

        destroyLi: function() {
            this.$menu.find('li').remove();
        },

        createLi: function() {
            var that = this,
                    _liA = [],
                    _liHtml = '';

            this.$element.find('option').each(function() {
                var $this = $(this);

                //Get the class and text for the option
                var optionClass = $this.attr('class') || '';
                var inline = $this.attr('style') || '';
                var text =  $this.data('content') ? $this.data('content') : $this.html();
                var subtext = $this.data('subtext') !== undefined ? '<small class="muted text-muted">' + $this.data('subtext') + '</small>' : '';
                var icon = $this.data('icon') !== undefined ? '<i class="' + that.options.iconBase + ' ' + $this.data('icon') + '"></i> ' : '';
                if (icon !== '' && ($this.is(':disabled') || $this.parent().is(':disabled'))) {
                    icon = '<span>'+icon+'</span>';
                }

                if (!$this.data('content')) {
                    //Prepend any icon and append any subtext to the main text.
                    text = icon + '<span class="text">' + text + subtext + '</span>';
                }

                if (that.options.hideDisabled && ($this.is(':disabled') || $this.parent().is(':disabled'))) {
                    _liA.push('<a style="min-height: 0; padding: 0"></a>');
                } else if ($this.parent().is('optgroup') && $this.data('divider') !== true) {
                    if ($this.index() === 0) {
                        //Get the opt group label
                        var label = $this.parent().attr('label');
                        var labelSubtext = $this.parent().data('subtext') !== undefined ? '<small class="muted text-muted">'+$this.parent().data('subtext')+'</small>' : '';
                        var labelIcon = $this.parent().data('icon') ? '<i class="'+$this.parent().data('icon')+'"></i> ' : '';
                        label = labelIcon + '<span class="text">' + label + labelSubtext + '</span>';

                        if ($this[0].index !== 0) {
                            _liA.push(
                                    '<div class="div-contain"><div class="divider"></div></div>'+
                                            '<dt>'+label+'</dt>'+
                                            that.createA(text, 'opt ' + optionClass, inline )
                            );
                        } else {
                            _liA.push(
                                    '<dt>'+label+'</dt>'+
                                            that.createA(text, 'opt ' + optionClass, inline ));
                        }
                    } else {
                        _liA.push(that.createA(text, 'opt ' + optionClass, inline ));
                    }
                } else if ($this.data('divider') === true) {
                    _liA.push('<div class="div-contain"><div class="divider"></div></div>');
                } else if ($(this).data('hidden') === true) {
                    _liA.push('<a></a>');
                } else {
                    _liA.push(that.createA(text, optionClass, inline ));
                }
            });

            $.each(_liA, function(i, item) {
                var hide = item === '<a></a>' ? 'class="hide is-hidden"' : '';
                _liHtml += '<li rel="' + i + '"' + hide + '>' + item + '</li>';
            });

            //If we are not multiple, and we dont have a selected item, and we dont have a title, select the first element so something is set in the button
            if (!this.multiple && this.$element.find('option:selected').length===0 && !this.options.title) {
                this.$element.find('option').eq(0).prop('selected', true).attr('selected', 'selected');
            }

            return $(_liHtml);
        },

        createA: function(text, classes, inline) {
            return '<a tabindex="0" class="'+classes+'" style="'+inline+'">' +
                    text +
                    '<i class="' + this.options.iconBase + ' ' + this.options.tickIcon + ' icon-ok check-mark"></i>' +
                    '</a>';
        },

        render: function(updateLi) {
            var that = this;

            //Update the LI to match the SELECT
            if (updateLi !== false) {
                this.$element.find('option').each(function(index) {
                    that.setDisabled(index, $(this).is(':disabled') || $(this).parent().is(':disabled') );
                    that.setSelected(index, $(this).is(':selected') );
                });
            }

            this.tabIndex();

            var selectedItems = this.$element.find('option:selected').map(function() {
                var $this = $(this);
                var icon = $this.data('icon') && that.options.showIcon ? '<i class="' + that.options.iconBase + ' ' + $this.data('icon') + '"></i> ' : '';
                var subtext;
                if (that.options.showSubtext && $this.attr('data-subtext') && !that.multiple) {
                    subtext = ' <small class="muted text-muted">'+$this.data('subtext') +'</small>';
                } else {
                    subtext = '';
                }
                if ($this.data('content') && that.options.showContent) {
                    return $this.data('content');
                } else if ($this.attr('title') !== undefined) {
                    return $this.attr('title');
                } else {
                    return icon + $this.html() + subtext;
                }
            }).toArray();

            //Fixes issue in IE10 occurring when no default option is selected and at least one option is disabled
            //Convert all the values into a comma delimited string
            var title = !this.multiple ? selectedItems[0] : selectedItems.join(this.options.multipleSeparator);

            //If this is multi select, and the selectText type is count, the show 1 of 2 selected etc..
            if (this.multiple && this.options.selectedTextFormat.indexOf('count') > -1) {
                var max = this.options.selectedTextFormat.split('>');
                var notDisabled = this.options.hideDisabled ? ':not([disabled])' : '';
                if ( (max.length>1 && selectedItems.length > max[1]) || (max.length==1 && selectedItems.length>=2)) {
                    title = this.options.countSelectedText.replace('{0}', selectedItems.length).replace('{1}', this.$element.find('option:not([data-divider="true"]):not([data-hidden="true"])'+notDisabled).length);
                }
            }

            this.options.title = this.$element.attr('title');

            //If we dont have a title, then use the default, or if nothing is set at all, use the not selected text
            if (!title) {
                title = this.options.title !== undefined ? this.options.title : this.options.noneSelectedText;
            }

            this.$button.attr('title', $.trim(title));
            this.$newElement.find('.filter-option').html(title);
        },

        setStyle: function(style, status) {
            if (this.$element.attr('class')) {
                this.$newElement.addClass(this.$element.attr('class').replace(/selectpicker|mobile-device/gi, ''));
            }

            var buttonClass = style ? style : this.options.style;

            if (status == 'add') {
                this.$button.addClass(buttonClass);
            } else if (status == 'remove') {
                this.$button.removeClass(buttonClass);
            } else {
                this.$button.removeClass(this.options.style);
                this.$button.addClass(buttonClass);
            }
        },

        liHeight: function() {
            if (this.options.size === false) return;

            var $selectClone = this.$menu.parent().clone().find('> .dropdown-toggle').prop('autofocus', false).end().appendTo('body'),
                    $menuClone = $selectClone.addClass('open').find('> .dropdown-menu'),
                    liHeight = $menuClone.find('li > a').outerHeight(),
                    headerHeight = this.options.header ? $menuClone.find('.popover-title').outerHeight() : 0,
                    searchHeight = this.options.liveSearch ? $menuClone.find('.bootstrap-select-searchbox').outerHeight() : 0,
                    actionsHeight = this.options.actionsBox ? $menuClone.find('.bs-actionsbox').outerHeight() : 0;

            $selectClone.remove();

            this.$newElement
                    .data('liHeight', liHeight)
                    .data('headerHeight', headerHeight)
                    .data('searchHeight', searchHeight)
                    .data('actionsHeight', actionsHeight);
        },

        setSize: function() {
            var that = this,
                    menu = this.$menu,
                    menuInner = menu.find('.inner'),
                    selectHeight = this.$newElement.outerHeight(),
                    liHeight = this.$newElement.data('liHeight'),
                    headerHeight = this.$newElement.data('headerHeight'),
                    searchHeight = this.$newElement.data('searchHeight'),
                    actionsHeight = this.$newElement.data('actionsHeight'),
                    divHeight = menu.find('li .divider').outerHeight(true),
                    menuPadding = parseInt(menu.css('padding-top')) +
                            parseInt(menu.css('padding-bottom')) +
                            parseInt(menu.css('border-top-width')) +
                            parseInt(menu.css('border-bottom-width')),
                    notDisabled = this.options.hideDisabled ? ':not(.disabled)' : '',
                    $window = $(window),
                    menuExtras = menuPadding + parseInt(menu.css('margin-top')) + parseInt(menu.css('margin-bottom')) + 2,
                    menuHeight,
                    selectOffsetTop,
                    selectOffsetBot,
                    posVert = function() {
                        selectOffsetTop = that.$newElement.offset().top - $window.scrollTop();
                        selectOffsetBot = $window.height() - selectOffsetTop - selectHeight;
                    };
            posVert();
            if (this.options.header) menu.css('padding-top', 0);

            if (this.options.size == 'auto') {
                var getSize = function() {
                    var minHeight,
                            lisVis = that.$lis.not('.hide');

                    posVert();
                    menuHeight = selectOffsetBot - menuExtras;

                    if (that.options.dropupAuto) {
                        that.$newElement.toggleClass('dropup', (selectOffsetTop > selectOffsetBot) && ((menuHeight - menuExtras) < menu.height()));
                    }
                    if (that.$newElement.hasClass('dropup')) {
                        menuHeight = selectOffsetTop - menuExtras;
                    }

                    if ((lisVis.length + lisVis.find('dt').length) > 3) {
                        minHeight = liHeight*3 + menuExtras - 2;
                    } else {
                        minHeight = 0;
                    }

                    menu.css({'max-height' : menuHeight + 'px', 'overflow' : 'hidden', 'min-height' : minHeight + headerHeight + searchHeight + actionsHeight + 'px'});
                    menuInner.css({'max-height' : menuHeight - headerHeight - searchHeight - actionsHeight - menuPadding + 'px', 'overflow-y' : 'auto', 'min-height' : Math.max(minHeight - menuPadding, 0) + 'px'});
                };
                getSize();
                this.$searchbox.off('input.getSize propertychange.getSize').on('input.getSize propertychange.getSize', getSize);
                $(window).off('resize.getSize').on('resize.getSize', getSize);
                $(window).off('scroll.getSize').on('scroll.getSize', getSize);
            } else if (this.options.size && this.options.size != 'auto' && menu.find('li'+notDisabled).length > this.options.size) {
                var optIndex = menu.find('li'+notDisabled+' > *').filter(':not(.div-contain)').slice(0,this.options.size).last().parent().index();
                var divLength = menu.find('li').slice(0,optIndex + 1).find('.div-contain').length;
                menuHeight = liHeight*this.options.size + divLength*divHeight + menuPadding;
                if (that.options.dropupAuto) {
                    this.$newElement.toggleClass('dropup', (selectOffsetTop > selectOffsetBot) && (menuHeight < menu.height()));
                }
                menu.css({'max-height' : menuHeight + headerHeight + searchHeight + actionsHeight + 'px', 'overflow' : 'hidden'});
                menuInner.css({'max-height' : menuHeight - menuPadding + 'px', 'overflow-y' : 'auto'});
            }
        },

        setWidth: function() {
            if (this.options.width == 'auto') {
                this.$menu.css('min-width', '0');

                // Get correct width if element hidden
                var selectClone = this.$newElement.clone().appendTo('body');
                var ulWidth = selectClone.find('> .dropdown-menu').css('width');
                var btnWidth = selectClone.css('width', 'auto').find('> button').css('width');
                selectClone.remove();

                // Set width to whatever's larger, button title or longest option
                this.$newElement.css('width', Math.max(parseInt(ulWidth), parseInt(btnWidth)) + 'px');
            } else if (this.options.width == 'fit') {
                // Remove inline min-width so width can be changed from 'auto'
                this.$menu.css('min-width', '');
                this.$newElement.css('width', '').addClass('fit-width');
            } else if (this.options.width) {
                // Remove inline min-width so width can be changed from 'auto'
                this.$menu.css('min-width', '');
                this.$newElement.css('width', this.options.width);
            } else {
                // Remove inline min-width/width so width can be changed
                this.$menu.css('min-width', '');
                this.$newElement.css('width', '');
            }
            // Remove fit-width class if width is changed programmatically
            if (this.$newElement.hasClass('fit-width') && this.options.width !== 'fit') {
                this.$newElement.removeClass('fit-width');
            }
        },

        selectPosition: function() {
            var that = this,
                    drop = '<div />',
                    $drop = $(drop),
                    pos,
                    actualHeight,
                    getPlacement = function($element) {
                        $drop.addClass($element.attr('class').replace(/form-control/gi, '')).toggleClass('dropup', $element.hasClass('dropup'));
                        pos = $element.offset();
                        actualHeight = $element.hasClass('dropup') ? 0 : $element[0].offsetHeight;
                        $drop.css({'top' : pos.top + actualHeight, 'left' : pos.left, 'width' : $element[0].offsetWidth, 'position' : 'absolute'});
                    };
            this.$newElement.on('click', function() {
                if (that.isDisabled()) {
                    return;
                }
                getPlacement($(this));
                $drop.appendTo(that.options.container);
                $drop.toggleClass('open', !$(this).hasClass('open'));
                $drop.append(that.$menu);
            });
            $(window).resize(function() {
                getPlacement(that.$newElement);
            });
            $(window).on('scroll', function() {
                getPlacement(that.$newElement);
            });
            $('html').on('click', function(e) {
                if ($(e.target).closest(that.$newElement).length < 1) {
                    $drop.removeClass('open');
                }
            });
        },

        mobile: function() {
            this.$element.addClass('mobile-device').appendTo(this.$newElement);
            if (this.options.container) this.$menu.hide();
        },

        refresh: function() {
            this.$lis = null;
            this.reloadLi();
            this.render();
            this.setWidth();
            this.setStyle();
            this.checkDisabled();
            this.liHeight();
        },

        update: function() {
            this.reloadLi();
            this.setWidth();
            this.setStyle();
            this.checkDisabled();
            this.liHeight();
        },

        setSelected: function(index, selected) {
            if (this.$lis == null) this.$lis = this.$menu.find('li');
            $(this.$lis[index]).toggleClass('selected', selected);
        },

        setDisabled: function(index, disabled) {
            if (this.$lis == null) this.$lis = this.$menu.find('li');
            if (disabled) {
                $(this.$lis[index]).addClass('disabled').find('a').attr('href', '#').attr('tabindex', -1);
            } else {
                $(this.$lis[index]).removeClass('disabled').find('a').removeAttr('href').attr('tabindex', 0);
            }
        },

        isDisabled: function() {
            return this.$element.is(':disabled');
        },

        checkDisabled: function() {
            var that = this;

            if (this.isDisabled()) {
                this.$button.addClass('disabled').attr('tabindex', -1);
            } else {
                if (this.$button.hasClass('disabled')) {
                    this.$button.removeClass('disabled');
                }

                if (this.$button.attr('tabindex') == -1) {
                    if (!this.$element.data('tabindex')) this.$button.removeAttr('tabindex');
                }
            }

            this.$button.click(function() {
                return !that.isDisabled();
            });
        },

        tabIndex: function() {
            if (this.$element.is('[tabindex]')) {
                this.$element.data('tabindex', this.$element.attr('tabindex'));
                this.$button.attr('tabindex', this.$element.data('tabindex'));
            }
        },

        clickListener: function() {
            var that = this;

            $('body').on('touchstart.dropdown', '.dropdown-menu', function(e) {
                e.stopPropagation();
            });

            this.$newElement.on('click', function() {
                that.setSize();
                if (!that.options.liveSearch && !that.multiple) {
                    setTimeout(function() {
                        that.$menu.find('.selected a').focus();
                    }, 10);
                }
            });

            this.$menu.on('click', 'li a', function(e) {
                var clickedIndex = $(this).parent().index(),
                        prevValue = that.$element.val(),
                        prevIndex = that.$element.prop('selectedIndex');

                //Dont close on multi choice menu
                if (that.multiple) {
                    e.stopPropagation();
                }

                e.preventDefault();

                //Dont run if we have been disabled
                if (!that.isDisabled() && !$(this).parent().hasClass('disabled')) {
                    var $options = that.$element.find('option'),
                            $option = $options.eq(clickedIndex),
                            state = $option.prop('selected'),
                            $optgroup = $option.parent('optgroup'),
                            maxOptions = that.options.maxOptions,
                            maxOptionsGrp = $optgroup.data('maxOptions') || false;

                    //Deselect all others if not multi select box
                    if (!that.multiple) {
                        $options.prop('selected', false);
                        $option.prop('selected', true);
                        that.$menu.find('.selected').removeClass('selected');
                        that.setSelected(clickedIndex, true);
                    }
                    //Else toggle the one we have chosen if we are multi select.
                    else {
                        $option.prop('selected', !state);
                        that.setSelected(clickedIndex, !state);

                        if ((maxOptions !== false) || (maxOptionsGrp !== false)) {
                            var maxReached = maxOptions < $options.filter(':selected').length,
                                    maxReachedGrp = maxOptionsGrp < $optgroup.find('option:selected').length,
                                    maxOptionsArr = that.options.maxOptionsText,
                                    maxTxt = maxOptionsArr[0].replace('{n}', maxOptions),
                                    maxTxtGrp = maxOptionsArr[1].replace('{n}', maxOptionsGrp),
                                    $notify = $('<div class="notify"></div>');

                            if ((maxOptions && maxReached) || (maxOptionsGrp && maxReachedGrp)) {
                                // If {var} is set in array, replace it
                                if (maxOptionsArr[2]) {
                                    maxTxt = maxTxt.replace('{var}', maxOptionsArr[2][maxOptions > 1 ? 0 : 1]);
                                    maxTxtGrp = maxTxtGrp.replace('{var}', maxOptionsArr[2][maxOptionsGrp > 1 ? 0 : 1]);
                                }

                                $option.prop('selected', false);

                                that.$menu.append($notify);

                                if (maxOptions && maxReached) {
                                    $notify.append($('<div>' + maxTxt + '</div>'));
                                    that.$element.trigger('maxReached.bs.select');
                                }

                                if (maxOptionsGrp && maxReachedGrp) {
                                    $notify.append($('<div>' + maxTxtGrp + '</div>'));
                                    that.$element.trigger('maxReachedGrp.bs.select');
                                }

                                setTimeout(function() {
                                    that.setSelected(clickedIndex, false);
                                }, 10);

                                $notify.delay(750).fadeOut(300, function() { $(this).remove(); });
                            }
                        }
                    }

                    if (!that.multiple) {
                        that.$button.focus();
                    } else if (that.options.liveSearch) {
                        that.$searchbox.focus();
                    }

                    // Trigger select 'change'
                    if ((prevValue != that.$element.val() && that.multiple) || (prevIndex != that.$element.prop('selectedIndex') && !that.multiple)) {
                        that.$element.change();
                    }
                }
            });

            this.$menu.on('click', 'li.disabled a, li dt, li .div-contain, .popover-title, .popover-title :not(.close)', function(e) {
                if (e.target == this) {
                    e.preventDefault();
                    e.stopPropagation();
                    if (!that.options.liveSearch) {
                        that.$button.focus();
                    } else {
                        that.$searchbox.focus();
                    }
                }
            });

            this.$menu.on('click', '.popover-title .close', function() {
                that.$button.focus();
            });

            this.$searchbox.on('click', function(e) {
                e.stopPropagation();
            });


            this.$menu.on('click', '.actions-btn', function(e) {
                if (that.options.liveSearch) {
                    that.$searchbox.focus();
                } else {
                    that.$button.focus();
                }

                e.preventDefault();
                e.stopPropagation();

                if ($(this).is('.bs-select-all')) {
                    that.selectAll();
                } else {
                    that.deselectAll();
                }
                that.$element.change();
            });

            this.$element.change(function() {
                that.render(false);
            });
        },

        liveSearchListener: function() {
            var that = this,
                    no_results = $('<li class="no-results"></li>');

            this.$newElement.on('click.dropdown.data-api', function() {
                that.$menu.find('.active').removeClass('active');
                if (!!that.$searchbox.val()) {
                    that.$searchbox.val('');
                    that.$lis.not('.is-hidden').removeClass('hide');
                    if (!!no_results.parent().length) no_results.remove();
                }
                if (!that.multiple) that.$menu.find('.selected').addClass('active');
                setTimeout(function() {
                    that.$searchbox.focus();
                }, 10);
            });

            this.$searchbox.on('input propertychange', function() {
                if (that.$searchbox.val()) {
                    that.$lis.not('.is-hidden').removeClass('hide').find('a').not(':icontains(' + that.$searchbox.val() + ')').parent().addClass('hide');

                    if (!that.$menu.find('li').filter(':visible:not(.no-results)').length) {
                        if (!!no_results.parent().length) no_results.remove();
                        no_results.html(that.options.noneResultsText + ' "'+ that.$searchbox.val() + '"').show();
                        that.$menu.find('li').last().after(no_results);
                    } else if (!!no_results.parent().length) {
                        no_results.remove();
                    }

                } else {
                    that.$lis.not('.is-hidden').removeClass('hide');
                    if (!!no_results.parent().length) no_results.remove();
                }

                that.$menu.find('li.active').removeClass('active');
                that.$menu.find('li').filter(':visible:not(.divider)').eq(0).addClass('active').find('a').focus();
                $(this).focus();
            });

            this.$menu.on('mouseenter', 'a', function(e) {
                that.$menu.find('.active').removeClass('active');
                $(e.currentTarget).parent().not('.disabled').addClass('active');
            });

            this.$menu.on('mouseleave', 'a', function() {
                that.$menu.find('.active').removeClass('active');
            });
        },

        val: function(value) {

            if (value !== undefined) {
                this.$element.val( value );

                this.$element.change();
                return this.$element;
            } else {
                return this.$element.val();
            }
        },

        selectAll: function() {
            if (this.$lis == null) this.$lis = this.$menu.find('li');
            this.$element.find('option:enabled').prop('selected', true);
            $(this.$lis).filter(':not(.disabled)').addClass('selected');
            this.render(false);
        },

        deselectAll: function() {
            if (this.$lis == null) this.$lis = this.$menu.find('li');
            this.$element.find('option:enabled').prop('selected', false);
            $(this.$lis).filter(':not(.disabled)').removeClass('selected');
            this.render(false);
        },

        keydown: function(e) {
            var $this,
                    $items,
                    $parent,
                    index,
                    next,
                    first,
                    last,
                    prev,
                    nextPrev,
                    that,
                    prevIndex,
                    isActive,
                    keyCodeMap = {
                        32:' ', 48:'0', 49:'1', 50:'2', 51:'3', 52:'4', 53:'5', 54:'6', 55:'7', 56:'8', 57:'9', 59:';',
                        65:'a', 66:'b', 67:'c', 68:'d', 69:'e', 70:'f', 71:'g', 72:'h', 73:'i', 74:'j', 75:'k', 76:'l',
                        77:'m', 78:'n', 79:'o', 80:'p', 81:'q', 82:'r', 83:'s', 84:'t', 85:'u', 86:'v', 87:'w', 88:'x',
                        89:'y', 90:'z', 96:'0', 97:'1', 98:'2', 99:'3', 100:'4', 101:'5', 102:'6', 103:'7', 104:'8', 105:'9'
                    };

            $this = $(this);

            $parent = $this.parent();

            if ($this.is('input')) $parent = $this.parent().parent();

            that = $parent.data('this');

            if (that.options.liveSearch) $parent = $this.parent().parent();

            if (that.options.container) $parent = that.$menu;

            $items = $('[role=menu] li:not(.divider) a', $parent);

            isActive = that.$menu.parent().hasClass('open');

            if (!isActive && /([0-9]|[A-z])/.test(String.fromCharCode(e.keyCode))) {
                if (!that.options.container) {
                    that.setSize();
                    that.$menu.parent().addClass('open');
                    isActive = that.$menu.parent().hasClass('open');
                } else {
                    that.$newElement.trigger('click');
                }
                that.$searchbox.focus();
            }

            if (that.options.liveSearch) {
                if (/(^9$|27)/.test(e.keyCode) && isActive && that.$menu.find('.active').length === 0) {
                    e.preventDefault();
                    that.$menu.parent().removeClass('open');
                    that.$button.focus();
                }
                $items = $('[role=menu] li:not(.divider):visible', $parent);
                if (!$this.val() && !/(38|40)/.test(e.keyCode)) {
                    if ($items.filter('.active').length === 0) {
                        $items = that.$newElement.find('li').filter(':icontains(' + keyCodeMap[e.keyCode] + ')');
                    }
                }
            }

            if (!$items.length) return;

            if (/(38|40)/.test(e.keyCode)) {

                index = $items.index($items.filter(':focus'));
                first = $items.parent(':not(.disabled):visible').first().index();
                last = $items.parent(':not(.disabled):visible').last().index();
                next = $items.eq(index).parent().nextAll(':not(.disabled):visible').eq(0).index();
                prev = $items.eq(index).parent().prevAll(':not(.disabled):visible').eq(0).index();
                nextPrev = $items.eq(next).parent().prevAll(':not(.disabled):visible').eq(0).index();

                if (that.options.liveSearch) {
                    $items.each(function(i) {
                        if ($(this).is(':not(.disabled)')) {
                            $(this).data('index', i);
                        }
                    });
                    index = $items.index($items.filter('.active'));
                    first = $items.filter(':not(.disabled):visible').first().data('index');
                    last = $items.filter(':not(.disabled):visible').last().data('index');
                    next = $items.eq(index).nextAll(':not(.disabled):visible').eq(0).data('index');
                    prev = $items.eq(index).prevAll(':not(.disabled):visible').eq(0).data('index');
                    nextPrev = $items.eq(next).prevAll(':not(.disabled):visible').eq(0).data('index');
                }

                prevIndex = $this.data('prevIndex');

                if (e.keyCode == 38) {
                    if (that.options.liveSearch) index -= 1;
                    if (index != nextPrev && index > prev) index = prev;
                    if (index < first) index = first;
                    if (index == prevIndex) index = last;
                }

                if (e.keyCode == 40) {
                    if (that.options.liveSearch) index += 1;
                    if (index == -1) index = 0;
                    if (index != nextPrev && index < next) index = next;
                    if (index > last) index = last;
                    if (index == prevIndex) index = first;
                }

                $this.data('prevIndex', index);

                if (!that.options.liveSearch) {
                    $items.eq(index).focus();
                } else {
                    e.preventDefault();
                    if (!$this.is('.dropdown-toggle')) {
                        $items.removeClass('active');
                        $items.eq(index).addClass('active').find('a').focus();
                        $this.focus();
                    }
                }

            } else if (!$this.is('input')) {

                var keyIndex = [],
                        count,
                        prevKey;

                $items.each(function() {
                    if ($(this).parent().is(':not(.disabled)')) {
                        if ($.trim($(this).text().toLowerCase()).substring(0,1) == keyCodeMap[e.keyCode]) {
                            keyIndex.push($(this).parent().index());
                        }
                    }
                });

                count = $(document).data('keycount');
                count++;
                $(document).data('keycount',count);

                prevKey = $.trim($(':focus').text().toLowerCase()).substring(0,1);

                if (prevKey != keyCodeMap[e.keyCode]) {
                    count = 1;
                    $(document).data('keycount', count);
                } else if (count >= keyIndex.length) {
                    $(document).data('keycount', 0);
                    if (count > keyIndex.length) count = 1;
                }

                $items.eq(keyIndex[count - 1]).focus();
            }

            // Select focused option if "Enter", "Spacebar", "Tab" are pressed inside the menu.
            if (/(13|32|^9$)/.test(e.keyCode) && isActive) {
                if (!/(32)/.test(e.keyCode)) e.preventDefault();
                if (!that.options.liveSearch) {
                    $(':focus').click();
                } else if (!/(32)/.test(e.keyCode)) {
                    that.$menu.find('.active a').click();
                    $this.focus();
                }
                $(document).data('keycount',0);
            }

            if ((/(^9$|27)/.test(e.keyCode) && isActive && (that.multiple || that.options.liveSearch)) || (/(27)/.test(e.keyCode) && !isActive)) {
                that.$menu.parent().removeClass('open');
                that.$button.focus();
            }

        },

        hide: function() {
            this.$newElement.hide();
        },

        show: function() {
            this.$newElement.show();
        },

        destroy: function() {
            this.$newElement.remove();
            this.$element.remove();
        }
    };

    $.fn.selectpicker = function(option, event) {
        //get the args of the outer function..
        var args = arguments;
        var value;
        var chain = this.each(function() {
            if ($(this).is('select')) {
                var $this = $(this),
                        data = $this.data('selectpicker'),
                        options = typeof option == 'object' && option;

                if (!data) {
                    $this.data('selectpicker', (data = new Selectpicker(this, options, event)));
                } else if (options) {
                    for(var i in options) {
                        data.options[i] = options[i];
                    }
                }

                if (typeof option == 'string') {
                    //Copy the value of option, as once we shift the arguments
                    //it also shifts the value of option.
                    var property = option;
                    if (data[property] instanceof Function) {
                        [].shift.apply(args);
                        value = data[property].apply(data, args);
                    } else {
                        value = data.options[property];
                    }
                }
            }
        });

        if (value !== undefined) {
            return value;
        } else {
            return chain;
        }
    };

    $.fn.selectpicker.defaults = {
        style: 'btn-default',
        size: 'auto',
        title: null,
        selectedTextFormat : 'values',
        noneSelectedText : 'Nothing selected',
        noneResultsText : 'No results match',
        countSelectedText: '{0} of {1} selected',
        maxOptionsText: ['Limit reached ({n} {var} max)', 'Group limit reached ({n} {var} max)', ['items','item']],
        width: false,
        container: false,
        hideDisabled: false,
        showSubtext: false,
        showIcon: true,
        showContent: true,
        dropupAuto: true,
        header: false,
        liveSearch: false,
        actionsBox: false,
        multipleSeparator: ', ',
        iconBase: 'glyphicon',
        tickIcon: 'glyphicon-ok',
        maxOptions: false
    };

    $(document)
            .data('keycount', 0)
            .on('keydown', '.bootstrap-select [data-toggle=dropdown], .bootstrap-select [role=menu], .bootstrap-select-searchbox input', Selectpicker.prototype.keydown)
            .on('focusin.modal', '.bootstrap-select [data-toggle=dropdown], .bootstrap-select [role=menu], .bootstrap-select-searchbox input', function (e) { e.stopPropagation(); });

}(window.jQuery);