/*
* jQuery UI selectmenu
*
* Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*
* http://docs.jquery.com/UI
*/
(function($) {
    $.widget("ui.selectmenu", {
        _init: function() {
            var self = this, o = this.options;
            //quick array of button and menu id's
            this.ids = [this.element.attr('id') + '-' + 'button', this.element.attr('id') + '-' + 'menu'];
            //define safe mouseup for future toggling
            this._safemouseup = true;
            //create menu button wrapper
            this.newelement = $('<a class="'+ this.widgetBaseClass +' ui-widget ui-state-default ui-corner-all" id="'+this.ids[0]+'" role="button" href="#" aria-haspopup="true" aria-owns="'+this.ids[1]+'"></a>')
            .insertAfter(this.element);
            //transfer tabindex
            var tabindex = this.element.attr('tabindex');
            if(tabindex){
                this.newelement.attr('tabindex', tabindex);
            }
            //save reference to select in data for ease in calling methods
            this.newelement.data('selectelement', this.element);
            //menu icon
            this.selectmenuIcon = $('<span class="'+ this.widgetBaseClass +'-icon ui-icon"></span>')
            .prependTo(this.newelement)
            .addClass( (o.style == "popup")? 'ui-icon-triangle-2-n-s' : 'ui-icon-triangle-1-s' );
            //make associated form label trigger focus
            $('label[for='+this.element.attr('id')+']')
            .attr('for', this.ids[0])
            .bind('click', function(){
                self.newelement[0].focus();
                return false;
            });
            //click toggle for menu visibility
            this.newelement
            .bind('mousedown', function(event){
                self._toggle(event);
                //make sure a click won't open/close instantly
                if(o.style == "popup"){
                    self._safemouseup = false;
                    setTimeout(function(){
                        self._safemouseup = true;
                    }, 300);
                }
                return false;
            })
            .bind('click',function(){
                return false;
            })
            .keydown(function(event){
                var ret = true;
                switch (event.keyCode) {
                    case $.ui.keyCode.ENTER:
                        ret = true;
                        break;
                    case $.ui.keyCode.SPACE:
                        ret = false;
                        self._toggle(event);
                        break;
                    case $.ui.keyCode.UP:
                    case $.ui.keyCode.LEFT:
                        ret = false;
                        self._moveSelection(-1);
                        break;
                    case $.ui.keyCode.DOWN:
                    case $.ui.keyCode.RIGHT:
                        ret = false;
                        self._moveSelection(1);
                        break;
                    case $.ui.keyCode.TAB:
                        ret = true;
                        break;
                    default:
                        ret = false;
                        self._typeAhead(event.keyCode, 'mouseup');
                        break;
                }
                return ret;
            })
            .bind('mouseover focus', function(){
                $(this).addClass(self.widgetBaseClass+'-focus ui-state-hover');
            })
            .bind('mouseout blur', function(){
                $(this).removeClass(self.widgetBaseClass+'-focus ui-state-hover');
            });
            //document click closes menu
            $(document)
            .mousedown(function(event){
                self.close(event);
            });
            //change event on original selectmenu
            this.element
            .click(function(){
                this._refreshValue();
            })
            .focus(function(){
                this.newelement[0].focus();
            });
            //create menu portion, append to body
            var cornerClass = (o.style == "dropdown")? " ui-corner-bottom" : " ui-corner-all"
            this.list = $('<ul class="' + self.widgetBaseClass + '-menu ui-widget ui-widget-content'+cornerClass+'" aria-hidden="true" role="listbox" aria-labelledby="'+this.ids[0]+'" id="'+this.ids[1]+'"></ul>').appendTo('body');
            //serialize selectmenu element options
            var selectOptionData = [];
            this.element
            .find('option')
            .each(function(){
                selectOptionData.push({
                    value: $(this).attr('value'),
                    text: self._formatText(jQuery(this).text()),
                    selected: $(this).attr('selected'),
                    classes: $(this).attr('class'),
                    parentOptGroup: $(this).parent('optgroup').attr('label')
                });
            });
            //active state class is only used in popup style
            var activeClass = (self.options.style == "popup") ? " ui-state-active" : "";
            //write li's
            for(var i in selectOptionData){
                var thisLi = $('<li role="presentation"><a href="#" tabindex="-1" role="option" aria-selected="false">'+ selectOptionData[i].text +'</a></li>')
                .data('index',i)
                .addClass(selectOptionData[i].classes)
                .data('optionClasses', selectOptionData[i].classes|| '')
                .mouseup(function(event){
                    if(self._safemouseup){
                        var changed = $(this).data('index') != self._selectedIndex();
                        self.value($(this).data('index'));
                        self.select(event);
                        if(changed){
                            self.change(event);
                        }
                        self.close(event,true);
                    }
                    return false;
                })
                .click(function(){
                    return false;
                })
                .bind('mouseover focus', function(){
                    self._selectedOptionLi().addClass(activeClass);
                    self._focusedOptionLi().removeClass(self.widgetBaseClass+'-item-focus ui-state-hover');
                    $(this).removeClass('ui-state-active').addClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                })
                .bind('mouseout blur', function(){
                    if($(this).is( self._selectedOptionLi() )){
                        $(this).addClass(activeClass);
                    }
                    $(this).removeClass(self.widgetBaseClass + '-item-focus ui-state-hover');
                });
                //optgroup or not...
                if(selectOptionData[i].parentOptGroup){
                    var optGroupName = self.widgetBaseClass + '-group-' + selectOptionData[i].parentOptGroup;
                    if(this.list.find('li.' + optGroupName).size()){
                        this.list.find('li.' + optGroupName + ':last ul').append(thisLi);
                    }
                    else{
                        $('<li role="presentation" class="'+self.widgetBaseClass+'-group '+optGroupName+'"><span class="'+self.widgetBaseClass+'-group-label">'+selectOptionData[i].parentOptGroup+'</span><ul></ul></li>')
                        .appendTo(this.list)
                        .find('ul')
                        .append(thisLi);
                    }
                }
                else{
                    thisLi.appendTo(this.list);
                }
                //this allows for using the scrollbar in an overflowed list
                this.list.bind('mousedown mouseup', function(){
                    return false;
                });
                //append icon if option is specified
                if(o.icons){
                    for(var j in o.icons){
                        if(thisLi.is(o.icons[j].find)){
                            thisLi
                            .data('optionClasses', selectOptionData[i].classes + ' ' + self.widgetBaseClass + '-hasIcon')
                            .addClass(self.widgetBaseClass + '-hasIcon');
                            var iconClass = o.icons[j].icon || "";
                            thisLi
                            .find('a:eq(0)')
                            .prepend('<span class="'+self.widgetBaseClass+'-item-icon ui-icon '+iconClass + '"></span>');
                        }
                    }
                }
            }
            //add corners to top and bottom menu items
            this.list.find('li:last').addClass("ui-corner-bottom");
            if(o.style == 'popup'){
                this.list.find('li:first').addClass("ui-corner-top");
            }
            //transfer classes to selectmenu and list
            if(o.transferClasses){
                var transferClasses = this.element.attr('class') || '';
                this.newelement.add(this.list).addClass(transferClasses);
            }
            //original selectmenu width
            var selectWidth = this.element.width();
            //set menu button width
            this.newelement.width( (o.width) ? o.width : selectWidth);
            //set menu width to either menuWidth option value, width option value, or select width
            if(o.style == 'dropdown'){
                this.list.width( (o.menuWidth) ? o.menuWidth : ((o.width) ? o.width : selectWidth));
            }
            else {
                this.list.width( (o.menuWidth) ? o.menuWidth : ((o.width) ? o.width - o.handleWidth : selectWidth - o.handleWidth));
            }
            //set max height from option
            if(o.maxHeight && o.maxHeight < this.list.height()){
                this.list.height(o.maxHeight);
            }
            //save reference to actionable li's (not group label li's)
            this._optionLis = this.list.find('li:not(.'+ self.widgetBaseClass +'-group)');
            //transfer menu click to menu button
            this.list
            .keydown(function(event){
                var ret = true;
                switch (event.keyCode) {
                    case $.ui.keyCode.UP:
                    case $.ui.keyCode.LEFT:
                        ret = false;
                        self._moveFocus(-1);
                        break;
                    case $.ui.keyCode.DOWN:
                    case $.ui.keyCode.RIGHT:
                        ret = false;
                        self._moveFocus(1);
                        break;
                    case $.ui.keyCode.HOME:
                        ret = false;
                        self._moveFocus(':first');
                        break;
                    case $.ui.keyCode.PAGE_UP:
                        ret = false;
                        self._scrollPage('up');
                        break;
                    case $.ui.keyCode.PAGE_DOWN:
                        ret = false;
                        self._scrollPage('down');
                        break;
                    case $.ui.keyCode.END:
                        ret = false;
                        self._moveFocus(':last');
                        break;
                    case $.ui.keyCode.ENTER:
                    case $.ui.keyCode.SPACE:
                        ret = false;
                        self.close(event,true);
                        $(event.target).parents('li:eq(0)').trigger('mouseup');
                        break;
                    case $.ui.keyCode.TAB:
                        ret = true;
                        self.close(event,true);
                        break;
                    case $.ui.keyCode.ESCAPE:
                        ret = false;
                        self.close(event,true);
                        break;
                    default:
                        ret = false;
                        self._typeAhead(event.keyCode,'focus');
                        break;
                }
                return ret;
            });
            //selectmenu style
            if(o.style == 'dropdown'){
                this.newelement
                .addClass(self.widgetBaseClass+"-dropdown");
                this.list
                .addClass(self.widgetBaseClass+"-menu-dropdown");
            }
            else {
                this.newelement
                .addClass(self.widgetBaseClass+"-popup");
                this.list
                .addClass(self.widgetBaseClass+"-menu-popup");
            }
            //append status span to button
            this.newelement.prepend('<span class="'+self.widgetBaseClass+'-status">'+ selectOptionData[this._selectedIndex()].text +'</span>');
            //hide original selectmenu element
            this.element.hide();
            //transfer disabled state
            if(this.element.attr('disabled') == true){
                this.disable();
            }
            //update value
            this.value(this._selectedIndex());
        },
        destroy: function() {
            this.element.removeData(this.widgetName)
            .removeClass(this.widgetBaseClass + '-disabled' + ' ' + this.namespace + '-state-disabled')
            .removeAttr('aria-disabled');
            //unbind click on label, reset its for attr
            $('label[for='+this.newelement.attr('id')+']')
            .attr('for',this.element.attr('id'))
            .unbind('click');
            this.newelement.remove();
            this.list.remove();
            this.element.show();
        },
        _typeAhead: function(code, eventType){
            var self = this;
            //define self._prevChar if needed
            if(!self._prevChar){
                self._prevChar = ['',0];
            }
            var C = String.fromCharCode(code);
            c = C.toLowerCase();
            var focusFound = false;
            function focusOpt(elem, ind){
                focusFound = true;
                $(elem).trigger(eventType);
                self._prevChar[1] = ind;
            };
            this.list.find('li a').each(function(i){
                if(!focusFound){
                    var thisText = $(this).text();
                    if( thisText.indexOf(C) == 0 || thisText.indexOf(c) == 0){
                        if(self._prevChar[0] == C){
                            if(self._prevChar[1] < i){
                                focusOpt(this,i);
                            }
                        }
                        else{
                            focusOpt(this,i);
                        }
                    }
                }
            });
            this._prevChar[0] = C;
        },
        _uiHash: function(){
            return {
                value: this.value()
            };
        },
        open: function(event){
            var self = this;
            var disabledStatus = this.newelement.attr("aria-disabled");
            if(disabledStatus != 'true'){
                this._refreshPosition();
                this._closeOthers(event);
                this.newelement
                .addClass('ui-state-active');
                this.list
                .appendTo('body')
                .addClass(self.widgetBaseClass + '-open')
                .attr('aria-hidden', false)
                .find('li:not(.'+ self.widgetBaseClass +'-group):eq('+ this._selectedIndex() +') a')[0].focus();
                if(this.options.style == "dropdown"){
                    this.newelement.removeClass('ui-corner-all').addClass('ui-corner-top');
                }
                this._refreshPosition();
                this._trigger("open", event, this._uiHash());
            }
        },
        close: function(event, retainFocus){
            if(this.newelement.is('.ui-state-active')){
                this.newelement
                .removeClass('ui-state-active');
                this.list
                .attr('aria-hidden', true)
                .removeClass(this.widgetBaseClass+'-open');
                if(this.options.style == "dropdown"){
                    this.newelement.removeClass('ui-corner-top').addClass('ui-corner-all');
                }
                if(retainFocus){
                    this.newelement[0].focus();
                }
                this._trigger("close", event, this._uiHash());
            }
        },
        change: function(event) {
            this.element.trigger('change');
            this._trigger("change", event, this._uiHash());
        },
        select: function(event) {
            this._trigger("select", event, this._uiHash());
        },
        _closeOthers: function(event){
            $('.'+ this.widgetBaseClass +'.ui-state-active').not(this.newelement).each(function(){
                $(this).data('selectelement').selectmenu('close',event);
            });
            $('.'+ this.widgetBaseClass +'.ui-state-hover').trigger('mouseout');
        },
        _toggle: function(event,retainFocus){
            if(this.list.is('.'+ this.widgetBaseClass +'-open')){
                this.close(event,retainFocus);
            }
            else {
                this.open(event);
            }
        },
        _formatText: function(text){
            return this.options.format ? this.options.format(text) : text;
        },
        _selectedIndex: function(){
            return this.element[0].selectedIndex;
        },
        _selectedOptionLi: function(){
            return this._optionLis.eq(this._selectedIndex());
        },
        _focusedOptionLi: function(){
            return this.list.find('.'+ this.widgetBaseClass +'-item-focus');
        },
        _moveSelection: function(amt){
            var currIndex = parseInt(this._selectedOptionLi().data('index'), 10);
            var newIndex = currIndex + amt;
            return this._optionLis.eq(newIndex).trigger('mouseup');
        },
        _moveFocus: function(amt){
            if(!isNaN(amt)){
                var currIndex = parseInt(this._focusedOptionLi().data('index'), 10);
                var newIndex = currIndex + amt;
            }
            else {
                var newIndex = parseInt(this._optionLis.filter(amt).data('index'), 10);
            }
            if(newIndex < 0){
                newIndex = 0;
            }
            if(newIndex > this._optionLis.size()-1){
                newIndex = this._optionLis.size()-1;
            }
            var activeID = this.widgetBaseClass + '-item-' + Math.round(Math.random() * 1000);
            this._focusedOptionLi().find('a:eq(0)').attr('id','');
            this._optionLis.eq(newIndex).find('a:eq(0)').attr('id',activeID)[0].focus();
            this.list.attr('aria-activedescendant', activeID);
        },
        _scrollPage: function(direction){
            var numPerPage = Math.floor(this.list.outerHeight() / this.list.find('li:first').outerHeight());
            numPerPage = (direction == 'up') ? -numPerPage : numPerPage;
            this._moveFocus(numPerPage);
        },
        _setData: function(key, value) {
            this.options[key] = value;
            if (key == 'disabled') {
                this.close();
                this.element
                .add(this.newelement)
                .add(this.list)
                [value ? 'addClass' : 'removeClass'](
                    this.widgetBaseClass + '-disabled' + ' ' +
                    this.namespace + '-state-disabled')
                .attr("aria-disabled", value);
            }
        },
        value: function(newValue) {
            if (arguments.length) {
                this.element[0].selectedIndex = newValue;
                this._refreshValue();
                this._refreshPosition();
            }
            return this.element[0].selectedIndex;
        },
        _refreshValue: function() {
            var activeClass = (this.options.style == "popup") ? " ui-state-active" : "";
            var activeID = this.widgetBaseClass + '-item-' + Math.round(Math.random() * 1000);
            //deselect previous
            this.list
            .find('.'+ this.widgetBaseClass +'-item-selected')
            .removeClass(this.widgetBaseClass + "-item-selected" + activeClass)
            .find('a')
            .attr('aria-selected', 'false')
            .attr('id', '');
            //select new
            this._selectedOptionLi()
            .addClass(this.widgetBaseClass + "-item-selected"+activeClass)
            .find('a')
            .attr('aria-selected', 'true')
            .attr('id', activeID);
            //toggle any class brought in from option
            var currentOptionClasses = this.newelement.data('optionClasses') ? this.newelement.data('optionClasses') : "";
            var newOptionClasses = this._selectedOptionLi().data('optionClasses') ? this._selectedOptionLi().data('optionClasses') : "";
            this.newelement
            .removeClass(currentOptionClasses)
            .data('optionClasses', newOptionClasses)
            .addClass( newOptionClasses )
            .find('.'+this.widgetBaseClass+'-status')
            .html(
                this._selectedOptionLi()
                .find('a:eq(0)')
                .html()
                );
            this.list.attr('aria-activedescendant', activeID)
        },
        _refreshPosition: function(){
            //set left value
            this.list.css('left', this.newelement.offset().left);
            //set top value
            var menuTop = this.newelement.offset().top;
            var scrolledAmt = this.list[0].scrollTop;
            this.list.find('li:lt('+this._selectedIndex()+')').each(function(){
                scrolledAmt -= $(this).outerHeight();
            });
            if(this.newelement.is('.'+this.widgetBaseClass+'-popup')){
                menuTop+=scrolledAmt;
                this.list.css('top', menuTop);
            }
            else {
                menuTop += this.newelement.height();
                this.list.css('top', menuTop);
            }
        }
    });
    $.extend($.ui.selectmenu, {
        getter: "value",
        version: "@VERSION",
        eventPrefix: "selectmenu",
        defaults: {
            transferClasses: true,
            style: 'popup',
            width: null,
            menuWidth: null,
            handleWidth: 26,
            maxHeight: null,
            icons: null,
            format: null
        }
    });
})(jQuery);