/*
 FCBKcomplete 2.6
 - Jquery version required: 1.2.x, 1.3.x
 
 Changelog:
 
 - 2.00	new version of fcbkcomplete
 
 - 2.01 fixed bugs & added features
 		fixed filter bug for preadded items
 		focus on the input after selecting tag
 		the element removed pressing backspace when the element is selected
 		input tag in the control has a border in IE7
 		added iterate over each match and apply the plugin separately
 		set focus on the input after selecting tag
 
 - 2.02 fixed fist element selected bug
 		fixed defaultfilter error bug
 
 - 2.5 	removed selected="selected" attribute due ie bug
 		element search algorithm changed
 		better performance fix added
 		fixed many small bugs
 		onselect event added
 		onremove event added
 		
 - 2.6 	ie6/7 support fix added
 		added new public method addItem due request
 		added new options "firstselected" that you can set true/false to select first element on dropdown list
 		autoexpand input element added
 		removeItem bug fixed
 		and many more bug fixed
 		
 */

/* Coded by: emposha <admin@emposha.com> */
/* Copyright: Emposha.com <http://www.emposha.com/> - Distributed under MIT - Keep this message! */
/*
 * json_url         - url to fetch json object
 * cache       		- use cache
 * height           - maximum number of element shown before scroll will apear
 * newel            - show typed text like a element
 * firstselected	- automaticly select first element from dropdown
 * filter_case      - case sensitive filter
 * filter_selected  - filter selected items from list
 * complete_text    - text for complete page
 * maxshownitems	- maximum numbers that will be shown at dropdown list (less better performance)
 * onselect			- fire event on item select
 * onremove			- fire event on item remove
 */
 
jQuery(
    function ($) 
    {
	    $.fn.fcbkcomplete = function (opt) 
	    {
    		return this.each(function()
			{
		        function init()
		        {
		           createFCBK();       
	               preSet();
	               addInput(0); 
		        }
	        	
		        function createFCBK()
		        {	    
		           element.hide();
		           element.attr("multiple","multiple");
		           if (element.attr("name").indexOf("[]") == -1)
		           {
		           	   element.attr("name",element.attr("name")+"[]");
		           }
	        	   
		           holder = $(document.createElement("ul"));
	               holder.attr("class", "holder");
	               element.after(holder);
	               
	               complete = $(document.createElement("div"));
	               complete.addClass("facebook-auto");
	               complete.append('<div class="default">'+ options.complete_text +"</div>");
	               
				   if (browser_msie)
	               {
	                    complete.append('<iframe class="ie6fix" scrolling="no" frameborder="0"></iframe>');
	                    browser_msie_frame = complete.children('.ie6fix');
						//$("input:checkbox").parent().css("z-index","-1");
	               }
				   
	               feed = $(document.createElement("ul"));
	               feed.attr("id", elemid + "_feed");
	               
	               complete.prepend(feed);
	               holder.after(complete);
				   feed.css("width",complete.width());
		        }
	        	
		        function preSet()
		        {										
		            element.children("option").each( 
		                function(i,option) 
		                {									                    
							option = $(option);												
		                    if (option.hasClass("selected"))
		                    {																															
		                        addItem (option.text(), option.val(), true);
								option.attr("selected","selected");
		                    } 
							else
							{
								option.removeAttr("selected");	
							}

							cache.push({
								caption: option.text(),
								value: option.val()
							});
							search_string += "" + (cache.length - 1) + ":" + option.text() + ";";                
		                }
		            );
		        }
				
				//public method to add new item
				this.addItem = function(title, value)
				{
					addItem(title, value);
				}
	        	
		        function addItem (title, value, preadded)
		        {
	                var li = document.createElement("li");
	                var txt = document.createTextNode(title);
	                var aclose = document.createElement("a");       
	                
	                $(li).attr({"class": "bit-box","rel": value});
	                $(li).prepend(txt);        
	                $(aclose).attr({"class": "closebutton","href": "#"});
	                
	                li.appendChild(aclose);
	                holder.append(li);
	                
	                $(aclose).click(
	                    function(){
	                        $(this).parent("li").fadeOut("fast", 
	                            function(){
									removeItem($(this));	                                
	                            }
	                        );
	                        return false;
	                    }
	                );
	                
	                if (!preadded) 
	                {						
	                    $("#"+elemid + "_annoninput").remove();
						var _item;
	                    addInput(1);                        
	                    if (element.children("option[value=" + value + "]").length)
	                    {   							
							_item = element.children("option[value=" + value + "]");            
	                        _item.get(0).setAttribute("selected", "selected");
							if (!_item.hasClass("selected")) 
							{
								_item.addClass("selected");
							}
	                    }
	                    else
	                    {
	                        var _item = $(document.createElement("option"));							
	                        _item.attr("value", value).get(0).setAttribute("selected", "selected");
							_item.attr("value", value).addClass("selected");							
	                        _item.text(title);              
	                        element.append(_item);
	                    }
						if (options.onselect.length)
						{
							funCall(options.onselect,_item)
						}	
	                }					     
	                holder.children("li.bit-box.deleted").removeClass("deleted");
	                feed.hide();
					browser_msie?browser_msie_frame.hide():'';
	            }
	        	
				function removeItem(item)
				{					
					if (options.onremove.length)
					{
					    var _item = element.children("option[value=" + item.attr("rel") + "]");
						funCall(options.onremove,_item)
					}
					element.children("option[value=" + item.attr("rel") + "]").removeAttr("selected");
					element.children("option[value=" + item.attr("rel") + "]").removeClass("selected");
                    item.remove();					
					deleting = 0;					
				}
				
		        function addInput(focusme)
		        {
		            var li = $(document.createElement("li"));
	                var input = $(document.createElement("input"));
	                
	                li.attr({"class": "bit-input","id": elemid + "_annoninput"});        
	                input.attr({"type": "text","class": "maininput","size": "1"});        
	                holder.append(li.append(input));
	                
	                input.focus(
	                    function()
	                    {
	                        complete.fadeIn("fast");
	                    }
	                );
	                
	                input.blur(
	                    function()
	                    {
	                        complete.fadeOut("fast");
	                    }
	                );
	                
	                holder.click(
	                    function()
	                    {
	                        input.focus();
				            if (feed.length && input.val().length) 
				            {
					            feed.show();
				            }
				            else 
				            {				
					            feed.hide();
								browser_msie?browser_msie_frame.hide():'';
					            complete.children(".default").show();
				            }
	                    }
	                );
	                
					input.keypress(
	                    function(event)
	                    {							
	                        if (event.keyCode == 13)
							{
							    return false;
							}
							//auto expand input							
							input.attr("size",input.val().length + 1);							
	                    }
	                );
					
					input.keydown(
	                    function(event)
	                    {							
							//prevent to enter some bad chars when input is empty
							if(event.keyCode == 191)
							{								
								event.preventDefault();
								return false;
							}	                       					
	                    }
	                );
					
	                input.keyup(
	                    function(event)
	                    {
							var etext = xssPrevent(input.val());
														
							if (event.keyCode == 8 && etext.length == 0)
							{			
								feed.hide();
								browser_msie?browser_msie_frame.hide():'';				
								if (holder.children("li.bit-box.deleted").length == 0) 
								{
									holder.children("li.bit-box:last").addClass("deleted");
									return false;
								}
								else 
								{
									if (deleting)
								    {
								        return;
								    }
									deleting = 1;
									holder.children("li.bit-box.deleted").fadeOut("fast", function()
									{
										removeItem($(this));
										return false;
									});
								}
							}
							
	                        if (event.keyCode != 40 && event.keyCode != 38 && etext.length != 0) 
	                        {
	                            counter = 0;									                            
								
	                            if (options.json_url) 
	                            {
	                                if (options.cache && json_cache) 
	                                {
	                                    addMembers(etext);
	                                    bindEvents();
	                                }
	                                else 
	                                {
										//search texts > 1 fix by >J.montoya								
	                                    if (etext.length > 0) {
											$.getJSON(options.json_url + "&tag=" + etext, null, function(data){
												addMembers(etext, data);
												json_cache = true;
												bindEvents();
											});
										}
	                                }
	                            }
	                            else 
	                            {
									addMembers(etext);
	                                bindEvents();
	                            }
	                            complete.children(".default").hide();
								feed.show();
	                        }
	                    }
	                );
					if (focusme)
					{
						setTimeout(function(){
							input.focus();
							complete.children(".default").show();
						},1);
					}						    
		        }
	        	
				function addMembers(etext, data)
				{
					feed.html('');
					
					if (!options.cache) 
					{
						cache = new Array();
						search_string = "";
					}
					
					addTextItem(etext);
					
					if (data != null && data.length)
					{
						$.each(data, 
	                    	function(i, val)
	                    	{
								cache.push (
									{
										caption: val.caption,
										value: val.value
									}
								);
								search_string += "" + (cache.length - 1) + ":" + val.caption + ";";
							}
						);	
					}
					
					var maximum = options.maxshownitems<cache.length?options.maxshownitems:cache.length;
					var filter = "i";
					if (options.filter_case)
					{
						filter = ""; 
					}
					
					var myregexp, match;
					try {
						myregexp = eval('/(?:^|;)\\s*(\\d+)\\s*:[^;]*?' + etext + '[^;]*/g' + filter);
						match = myregexp.exec(search_string);
					} catch(ex){};
										
					var content = '';
					while (match != null && maximum > 0) 
					{
						var id = match[1];						
						var object = cache[id];	
						if (options.filter_selected && element.children("option[value=" + object.value + "]").hasClass("selected")) 
						{
							//nothing here...
						}
						else 
						{
							content += '<li rel="' + object.value + '">' + itemIllumination(object.caption, etext) + '</li>';
							counter++;
							maximum--;
						}						
						match = myregexp.exec(search_string);
					}
					feed.append(content);
					
					if (options.firstselected)
					{
					    focuson = feed.children("li:visible:first");
					    focuson.addClass("auto-focus");
					}
					
					if (counter > options.height) 
	                {
	                    feed.css({"height": (options.height * 24) + "px","overflow": "auto"});
						if (browser_msie)
	                    {
	                        browser_msie_frame.css({"height": (options.height * 24) + "px", "width": feed.width() + "px"}).show();
	                    }
	                }
	                else 
	                {
	                    feed.css("height", "auto");
						if (browser_msie)
	                    {
	                        browser_msie_frame.css({"height": feed.height() + "px", "width": feed.width() + "px"}).show();
	                    }
	                }				
				}
				
				function itemIllumination(text, etext)
				{
					if (options.filter_case) 
                    {     
						try {
							eval("var text = text.replace(/(.*)(" + etext + ")(.*)/gi,'$1<em>$2</em>$3');");
						} catch(ex){};
                    }
                    else 
                    {    
						try {
							eval("var text = text.replace(/(.*)(" + etext.toLowerCase() + ")(.*)/gi,'$1<em>$2</em>$3');");
						}catch(ex){};
                    }					
					return text;
				}
	        	
		        function bindFeedEvent() 
		        {		
			        feed.children("li").mouseover(
			            function()
			            {
				            feed.children("li").removeClass("auto-focus");
	                        $(this).addClass("auto-focus");
	                        focuson = $(this);
	                    }
	                );
	        		
			        feed.children("li").mouseout(
			            function()
			            {
	                        $(this).removeClass("auto-focus");
	                        focuson = null;
	                    }
	                );
		        }
	        	
		        function removeFeedEvent() 
		        {       	
			        feed.children("li").unbind("mouseover");	
			        feed.children("li").unbind("mouseout");
			        feed.mousemove(
			            function () 
			            {
				            bindFeedEvent();
				            feed.unbind("mousemove");
			            }
			        );	
		        }
	        	
		        function bindEvents()
		        {
		            var maininput = $("#"+elemid + "_annoninput").children(".maininput");	                 	
	       	        bindFeedEvent();      	
	                feed.children("li").unbind("mousedown");        
	                feed.children("li").mousedown( 
	                    function()
	                    {
							//click in the list
	                        var option = $(this); 
	                        addItem(option.text(),option.attr("rel"));
	                        feed.hide();
							browser_msie?browser_msie_frame.hide():'';
	                        complete.hide();
	                    }
	                );
	                
	                maininput.unbind("keydown");
	                maininput.keydown(
	                    function(event)
	                    {		
							if(event.keyCode == 191)
							{								
								event.preventDefault();
								return false;
							}
											
							if (event.keyCode != 8) 
							{
								holder.children("li.bit-box.deleted").removeClass("deleted");
							}
							
	                        if (event.keyCode == 13 && checkFocusOn()) 
	                        {
	                            var option = focuson;
	                            addItem(option.text(), option.attr("rel"));
	                            complete.hide();
	                            event.preventDefault();
								focuson = null;
								return false;
	                        }
							
							if (event.keyCode == 13 && !checkFocusOn()) 
	                        {
								if (options.newel) 
								{
									var value = xssPrevent($(this).val());
									addItem(value, value);
									complete.hide();
									event.preventDefault();
									focuson = null;
								}
								return false;							
	                        }
	                        
	                        if (event.keyCode == 40) 
	                        {               
					            removeFeedEvent();
	                            if (focuson == null || focuson.length == 0) 
	                            {
	                                focuson = feed.children("li:visible:first");
						            feed.get(0).scrollTop = 0;
	                            }
	                            else 
	                            {
	                                focuson.removeClass("auto-focus");
	                                focuson = focuson.nextAll("li:visible:first");
						            var prev = parseInt(focuson.prevAll("li:visible").length,10);
						            var next = parseInt(focuson.nextAll("li:visible").length,10);
						            if ((prev > Math.round(options.height /2) || next <= Math.round(options.height /2)) && typeof(focuson.get(0)) != "undefined") 
						            {
							            feed.get(0).scrollTop = parseInt(focuson.get(0).scrollHeight,10) * (prev - Math.round(options.height /2));
						            }
	                            }
					            feed.children("li").removeClass("auto-focus");
	                            focuson.addClass("auto-focus");
	                        }
	                        if (event.keyCode == 38) 
	                        {
					            removeFeedEvent();
	                            if (focuson == null || focuson.length == 0) 
	                            {
	                                focuson = feed.children("li:visible:last");
						            feed.get(0).scrollTop = parseInt(focuson.get(0).scrollHeight,10) * (parseInt(feed.children("li:visible").length,10) - Math.round(options.height /2));
	                            }
	                            else 
	                            {
	                                focuson.removeClass("auto-focus");
	                                focuson = focuson.prevAll("li:visible:first");
						            var prev = parseInt(focuson.prevAll("li:visible").length,10);
						            var next = parseInt(focuson.nextAll("li:visible").length,10);
						            if ((next > Math.round(options.height /2) || prev <= Math.round(options.height /2)) && typeof(focuson.get(0)) != "undefined") 
						            {
							            feed.get(0).scrollTop = parseInt(focuson.get(0).scrollHeight,10) * (prev - Math.round(options.height /2));
						            }
	                            }
					            feed.children("li").removeClass("auto-focus");
	                            focuson.addClass("auto-focus");
	                        }													
	                    }
	                );
		        }
	        	
		        function addTextItem(value)
		        {					
	                if (options.newel) 
	                {	
	                    feed.children("li[fckb=1]").remove();
	                    if (value.length == 0)
	                    {
	                    	return;
	                    }
	                    var li = $(document.createElement("li"));
	                    li.attr({"rel": value,"fckb": "1"}).html(value);
	                    feed.prepend(li);
				        counter++;
	                } else 
					{
						return;
					}
	            }
	        	
				function funCall(func,item)
				{	
					var _object = "";			
					for(i=0;i < item.get(0).attributes.length;i++)
					{	
						if (item.get(0).attributes[i].nodeValue != null) 
						{
							_object += "\"_" + item.get(0).attributes[i].nodeName + "\": \"" + item.get(0).attributes[i].nodeValue + "\",";
						}
					}
					_object = "{"+ _object + " notinuse: 0}";
					try {
						eval(func + "(" + _object + ")");
					}catch(ex){};
				}
				
				function checkFocusOn()
		        {
		            if (focuson == null)
		            {
		                return false;
		            }
		            if (focuson.length == 0)
		            {
		                return false;
		            }
		            return true;
		        }
				
				function xssPrevent(string)
                {					
                    string = string.replace(/[\"\'][\s]*javascript:(.*)[\"\']/g, "\"\"");
                    string = string.replace(/script(.*)/g, "");    
                    string = string.replace(/eval\((.*)\)/g, "");
                    string = string.replace('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/', '');
                    return string;
                }
				
		        var options = $.extend({
				        json_url: null,
				        cache: false,
				        height: "10",
				        newel: false,
						firstselected: false,
				        filter_case: false,
				        filter_hide: false,
				        complete_text: "Start to type...",
						maxshownitems:  30,
						onselect: "",
						onremove: ""
			        }, opt);
	        	
		        //system variables
		        var holder     		= null;
		        var feed       		= null;
		        var complete   		= null;
		        var counter    		= 0;
		        var cache      		= new Array();
				var json_cache		= false;
				var search_string	= "";
		        var focuson    		= null;
	        	var deleting		= 0;
				var browser_msie	= "\v"=="v";
				var browser_msie_frame;
				
		        var element = $(this);
		        var elemid = element.attr("id");
		        init();

		        return this;
			});
	    };
    }
);
