/**
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *              1.3 - 2006-12-04
 *              2.0 - 2007-02-07
 *
 */

var useBSNns;

if (useBSNns)
{
	if (typeof(bsn) == "undefined")
		bsn = {}
	_bsn = bsn;
}
else
{
	_bsn = this;
}



if (typeof(_bsn.Autosuggest) == "undefined")
	_bsn.Autosuggest = {}













_bsn.AutoSuggest = function (fldID, param)
{
	// no DOM - give up!
	//
	//if (!document.getElementById)
//		return false;
	
	
	
	
	// get field via DOM
	//
	this.fld = _bsn.DOM.getElement(fldID);

	if (!this.fld)
		return false;
	
	
	
	
	// init variables
	//
	this.sInput 		= "";
	this.nInputChars 	= 0;
	this.aSuggestions 	= [];
	this.iHighlighted 	= 0;
	
	
	
	
	// parameters object
	//
	this.oP = (param) ? param : {};
	
	// defaults	
	//
	if (!this.oP.minchars)									this.oP.minchars = 1;
	if (!this.oP.method)									this.oP.meth = "get";
	if (!this.oP.varname)									this.oP.varname = "input";
	if (!this.oP.className)									this.oP.className = "autosuggest";
	if (!this.oP.timeout)									this.oP.timeout = 2500;
	if (!this.oP.delay)										this.oP.delay = 500;
	if (!this.oP.offsety)									this.oP.offsety = -5;
	if (this.oP.shownoresults==undefined)					this.oP.shownoresults = true;
	if (!this.oP.noresults)									this.oP.noresults = "No results!";
	if (!this.oP.maxheight && this.oP.maxheight !== 0)		this.oP.maxheight = 250;
	if (!this.oP.cache && this.oP.cache != false)			this.oP.cache = true;
	
	
	
	
	
	// set keyup handler for field
	// and prevent autocomplete from client
	//
	var pointer = this;
	
	// NOTE: not using addEventListener because UpArrow fired twice in Safari
	//_bsn.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );
	
	this.fld.onkeypress 	= function(ev){ return pointer.onKeyPress(ev); }
	this.fld.onkeyup 		= function(ev){ return pointer.onKeyUp(ev); }
	
	this.fld.setAttribute("autocomplete","off");
}
















_bsn.AutoSuggest.prototype.onKeyPress = function(ev)
{
	
	var key = (window.event) ? window.event.keyCode : ev.keyCode;



	// set responses to keydown events in the field
	// this allows the user to use the arrow keys to scroll through the results
	// ESCAPE clears the list
	// TAB sets the current highlighted value
	//
	var RETURN = 13;
	var TAB = 9;
	var ESC = 27;
	
	var bubble = true;

	switch(key)
	{

		case RETURN:
			this.setHighlightedValue();
			bubble = false;
			break;


		case ESC:
			this.clearSuggestions();
			break;
	}

	return bubble;
}



_bsn.AutoSuggest.prototype.onKeyUp = function(ev)
{
	var key = (window.event) ? window.event.keyCode : ev.keyCode;
	


	// set responses to keydown events in the field
	// this allows the user to use the arrow keys to scroll through the results
	// ESCAPE clears the list
	// TAB sets the current highlighted value
	//

	var ARRUP = 38;
	var ARRDN = 40;
	
	var bubble = true;

	switch(key)
	{


		case ARRUP:
			this.changeHighlight(key);
			bubble = false;
			break;


		case ARRDN:
			this.changeHighlight(key);
			bubble = false;
			break;
		
		
		default:
			this.getSuggestions(this.fld.value);
	}

	return bubble;
	

}








_bsn.AutoSuggest.prototype.getSuggestions = function (val)
{
	
	// if input stays the same, do nothing
	//
	if (val == this.sInput)
		return false;

	
	// input length is less than the min required to trigger a request
	// reset input string
	// do nothing
	//
	if (val.length < this.oP.minchars)
	{
		this.sInput = "";
		return false;
	}
	
	
	// if caching enabled, and user is typing (ie. length of input is increasing)
	// filter results out of aSuggestions from last request
	//
	if (val.length>this.nInputChars && this.aSuggestions.length && this.oP.cache)
	{
		var arr = [];
		for (var i=0;i<this.aSuggestions.length;i++)
		{
			if (this.aSuggestions[i].size.substr(0,val.length).toLowerCase() == val.toLowerCase())
				arr.push( this.aSuggestions[i] );
			if (this.aSuggestions[i].model.substr(0,val.length).toLowerCase() == val.toLowerCase())
				arr.push( this.aSuggestions[i] );
		}
		
		this.sInput = val;
		this.nInputChars = val.length;
		this.aSuggestions = arr;
		
		this.createList(this.aSuggestions);
		
		
		
		return false;
	}
	else
	// do new request
	//
	{
		this.sInput = val;
		this.nInputChars = val.length;


		var pointer = this;
		clearTimeout(this.ajID);
		this.ajID = setTimeout( function() { pointer.doAjaxRequest() }, this.oP.delay );
	}

	return false;
}





_bsn.AutoSuggest.prototype.doAjaxRequest = function ()
{
	
	var pointer = this;
	
	// create ajax request
	var url = this.oP.script+this.oP.varname+"="+escape(this.fld.value);
	var meth = this.oP.meth;
	
	var onSuccessFunc = function (req) { pointer.setSuggestions(req) };
	var onErrorFunc = function (status) { alert("AJAX error: "+status); };

	new Ajax.Request(url, 
			{
				method: 'get',
				onSuccess: onSuccessFunc,
				onFailure: onErrorFunc
			}); 
}





_bsn.AutoSuggest.prototype.setSuggestions = function (req)
{
	this.aSuggestions = [];
	
	if (this.oP.json)
	{
		var jsondata = eval('(' + req.responseText + ')');
		
		for (var i=0;i<jsondata.results.length;i++)
		{
			this.aSuggestions.push(  { 'id':jsondata.results[i].id, 'value':jsondata.results[i].value, 'info':jsondata.results[i].info }  );
		}
	}
	else
	{

		var xml = req.responseXML;
	
		// traverse xml
		//
		var results = xml.getElementsByTagName('results')[0].childNodes;

		for (var i=0;i<results.length;i++)
		{
			if (results[i].hasChildNodes())
				var nodeValues = results[i].childNodes;
				var item = {'id':results[i].getAttribute('id')};
				for (var ii =0; ii<nodeValues.length; ii++){
					item[nodeValues[ii].tagName] = nodeValues[ii].childNodes[0].nodeValue;
				}
				this.aSuggestions.push(item);
		}
	
	}
	
	this.idAs = "as_"+this.fld.id;
	

	this.createList(this.aSuggestions);

}

_bsn.AutoSuggest.prototype.createList = function(arr)
{
	var pointer = this;
	
	// get rid of old list
	// and clear the list removal timeout
	//
	_bsn.DOM.removeElement(this.idAs);
	this.killTimeout();
	
	if (arr.length==0 && !this.oP.shownoresults){
		return;
	}
	// create holding div
	//
	var div = _bsn.DOM.createElement("div", {id:this.idAs, className:this.oP.className});	
	
	var hcorner = _bsn.DOM.createElement("div", {className:"as_corner"});
	var hbar = _bsn.DOM.createElement("div", {className:"as_bar"});
	var header = _bsn.DOM.createElement("div", {className:"as_header"});
	header.appendChild(hcorner);
	header.appendChild(hbar);
	div.appendChild(header);
	
	
	
	
	// create and populate ul
	//
	var ul = _bsn.DOM.createElement("ul", {id:"as_ul"});
	
	
	
	// loop throught arr of suggestions
	// creating an LI element for each suggestion
	//
	var maxContentLength = 0;
	for (var i=0;i<arr.length;i++)
	{
		// format output with the input enclosed in a EM element
		// (as HTML, not DOM)
		//
		var size = arr[i].size;
		var model = arr[i].model;

		var st_size = size.toLowerCase().indexOf( this.sInput.toLowerCase() );
		var st_model = model.toLowerCase().indexOf( this.sInput.toLowerCase() );
		if (st_size>-1){
			var output = size.substring(0,st_size) 
				+ "<em>" + size.substring(st_size, st_size+this.sInput.length) + "</em>" 
				+ size.substring(st_size+this.sInput.length) + " ( " + model + " )";
		}else{
			var output = size + " ( " + model.substring(0,st_model) 
				+ "<em>" + model.substring(st_model, st_model+this.sInput.length) + "</em>" 
				+ model.substring(st_model+this.sInput.length) + " )";
		}
		maxContentLength = (maxContentLength<output.length) ? output.length : maxContentLength; 
		/*var output = size + "( " + val.substring(0,st) 
		+ "<em>" + val.substring(st, st+this.sInput.length) + "</em>" 
		+ val.substring(st+this.sInput.length) + "";*/
		
		var span 		= _bsn.DOM.createElement("span", {}, output, true);
		if (arr[i].info != "")
		{
			var br			= _bsn.DOM.createElement("br", {});
			span.appendChild(br);
			var small		= _bsn.DOM.createElement("small", {}, arr[i].info);
			span.appendChild(small);
		}
		
		var a 			= _bsn.DOM.createElement("a", { href:"#" });
		a.className="autosuggest";
		var tl 		= _bsn.DOM.createElement("span", {className:"tl"}, " ");
		var tr 		= _bsn.DOM.createElement("span", {className:"tr"}, " ");
		a.appendChild(tl);
		a.appendChild(tr);
		
		a.appendChild(span);
		
		a.name = i+1;
		a.onclick = function () { pointer.setHighlightedValue(); return false; }
		a.onmouseover = function () { pointer.setHighlight(this.name); }
		
		var li 			= _bsn.DOM.createElement(  "li", {}, a  );
		
		ul.appendChild( li );
	}
	
	
	// no results
	//
	if (arr.length == 0)
	{
		var li 			= _bsn.DOM.createElement(  "li", {className:"as_warning"}, this.oP.noresults  );
		
		ul.appendChild( li );
	}
	
	
	div.appendChild( ul );
	
	
	var fcorner = _bsn.DOM.createElement("div", {className:"as_corner"});
	var fbar = _bsn.DOM.createElement("div", {className:"as_bar"});
	var footer = _bsn.DOM.createElement("div", {className:"as_footer"});
	footer.appendChild(fcorner);
	footer.appendChild(fbar);
	div.appendChild(footer);
	
	
	
	// get position of target textfield
	// position holding div below it
	// set width of holding div to width of field
	//
	var pos = _bsn.DOM.getPos(this.fld);
	
	div.style.left 		= pos.x + "px";
	div.style.top 		= ( pos.y + this.fld.offsetHeight + this.oP.offsety ) + "px";
	//div.style.width 	= this.fld.offsetWidth + "px";
	div.style.width 	= (maxContentLength * 5) + "px";
	
	
	
	// set mouseover functions for div
	// when mouse pointer leaves div, set a timeout to remove the list after an interval
	// when mouse enters div, kill the timeout so the list won't be removed
	//
	div.onmouseover 	= function(){ pointer.killTimeout() }
	div.onmouseout 		= function(){ pointer.resetTimeout() }


	// add DIV to document
	//
	document.getElementsByTagName("body")[0].appendChild(div);
	
	
	
	// currently no item is highlighted
	//
	this.iHighlighted = 0;
	
	
	
	
	
	
	// remove list after an interval
	//
	var pointer = this;
	this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
}


_bsn.AutoSuggest.prototype.changeHighlight = function(key)
{	
	var list = _bsn.DOM.getElement("as_ul");
	if (!list)
		return false;
	
	var n;

	if (key == 40)
		n = this.iHighlighted + 1;
	else if (key == 38)
		n = this.iHighlighted - 1;
	
	
	if (n > list.childNodes.length)
		n = list.childNodes.length;
	if (n < 1)
		n = 1;
	
	
	this.setHighlight(n);
}



_bsn.AutoSuggest.prototype.setHighlight = function(n)
{
	var list = _bsn.DOM.getElement("as_ul");
	if (!list)
		return false;
	
	if (this.iHighlighted > 0)
		this.clearHighlight();
	
	this.iHighlighted = Number(n);
	
	list.childNodes[this.iHighlighted-1].className = "as_highlight";


	this.killTimeout();
}


_bsn.AutoSuggest.prototype.clearHighlight = function()
{
	var list = _bsn.DOM.getElement("as_ul");
	if (!list)
		return false;
	
	if (this.iHighlighted > 0)
	{
		list.childNodes[this.iHighlighted-1].className = "";
		this.iHighlighted = 0;
	}
}


_bsn.AutoSuggest.prototype.setHighlightedValue = function ()
{
	if (this.iHighlighted)
	{
		var link = "index.php?option=com_tyre&task=view&id=" + this.aSuggestions[ this.iHighlighted-1 ].id;
		document.location = link;
		
		//this.sInput = this.fld.value = this.aSuggestions[ this.iHighlighted-1 ].value;
		
		// move cursor to end of input (safari)
		//
		this.fld.focus();
		if (this.fld.selectionStart)
			this.fld.setSelectionRange(this.sInput.length, this.sInput.length);
		

		this.clearSuggestions();
		
		// pass selected object to callback function, if exists
		//
		if (typeof(this.oP.callback) == "function")
			this.oP.callback( this.aSuggestions[this.iHighlighted-1] );
	}
}


_bsn.AutoSuggest.prototype.killTimeout = function()
{
	clearTimeout(this.toID);
}

_bsn.AutoSuggest.prototype.resetTimeout = function()
{
	clearTimeout(this.toID);
	var pointer = this;
	this.toID = setTimeout(function () { pointer.clearSuggestions() }, 1000);
}







_bsn.AutoSuggest.prototype.clearSuggestions = function ()
{
	
	this.killTimeout();
	
	var ele = _bsn.DOM.getElement(this.idAs);
	var pointer = this;
	if (ele)
	{
		var fade = new _bsn.Fader(ele,1,0,250,function () { _bsn.DOM.removeElement(pointer.idAs) });
	}
}

// DOM PROTOTYPE _____________________________________________


if (typeof(_bsn.DOM) == "undefined")
	_bsn.DOM = {}




_bsn.DOM.createElement = function ( type, attr, cont, html )
{
	var ne = document.createElement( type );
	if (!ne)
		return false;
		
	for (var a in attr)
		ne[a] = attr[a];
		
	if (typeof(cont) == "string" && !html)
		ne.appendChild( document.createTextNode(cont) );
	else if (typeof(cont) == "string" && html)
		ne.innerHTML = cont;
	else if (typeof(cont) == "object")
		ne.appendChild( cont );

	return ne;
}

_bsn.DOM.clearElement = function ( id )
{
	var ele = this.getElement( id );
	
	if (!ele)
		return false;
	
	while (ele.childNodes.length)
		ele.removeChild( ele.childNodes[0] );
	
	return true;
}

_bsn.DOM.removeElement = function ( ele )
{
	var e = this.getElement(ele);
	
	if (!e)
		return false;
	else if (e.parentNode.removeChild(e))
		return true;
	else
		return false;
}

_bsn.DOM.replaceContent = function ( id, cont, html )
{
	var ele = this.getElement( id );
	
	if (!ele)
		return false;
	
	this.clearElement( ele );
	
	if (typeof(cont) == "string" && !html)
		ele.appendChild( document.createTextNode(cont) );
	else if (typeof(cont) == "string" && html)
		ele.innerHTML = cont;
	else if (typeof(cont) == "object")
		ele.appendChild( cont );
}

_bsn.DOM.getElement = function ( ele )
{
	if (typeof(ele) == "undefined")	{
		return false;
	}
	else if (typeof(ele) == "string"){
		//var re = document.getElementById( ele );
		var re = $(ele);
		if (!re)
			return false;
		else if (typeof(re.appendChild) != "undefined" ) {
			return re;
		} else {
			return false;
		}
	}
	else if (typeof(ele.appendChild) != "undefined")
		return ele;
	else
		return false;
}

_bsn.DOM.appendChildren = function ( id, arr )
{
	var ele = this.getElement( id );
	
	if (!ele)
		return false;
	
	
	if (typeof(arr) != "object")
		return false;
		
	for (var i=0;i<arr.length;i++)
	{
		var cont = arr[i];
		if (typeof(cont) == "string")
			ele.appendChild( document.createTextNode(cont) );
		else if (typeof(cont) == "object")
			ele.appendChild( cont );
	}
}









_bsn.DOM.getPos = function ( ele )
{
	var ele = this.getElement(ele);

	var obj = ele;

	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
		curleft += obj.x;


	var obj = ele;
	
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
		curtop += obj.y;

	return {x:curleft, y:curtop}
}










// FADER PROTOTYPE _____________________________________________



if (typeof(_bsn.Fader) == "undefined")
	_bsn.Fader = {}





_bsn.Fader = function (ele, from, to, fadetime, callback)
{	
	if (!ele)
		return false;
	
	this.ele = ele;
	
	this.from = from;
	this.to = to;
	
	this.callback = callback;
	
	this.nDur = fadetime;
		
	this.nInt = 50;
	this.nTime = 0;
	
	var p = this;
	this.nID = setInterval(function() { p._fade() }, this.nInt);
}




_bsn.Fader.prototype._fade = function()
{
	this.nTime += this.nInt;
	
	var ieop = Math.round( this._tween(this.nTime, this.from, this.to, this.nDur) * 100 );
	var op = ieop / 100;
	
	if (this.ele.filters) // internet explorer
	{
		try
		{
			this.ele.filters.item("DXImageTransform.Microsoft.Alpha").opacity = ieop;
		} catch (e) { 
			// If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
			this.ele.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='+ieop+')';
		}
	}
	else // other browsers
	{
		this.ele.style.opacity = op;
	}
	
	
	if (this.nTime == this.nDur)
	{
		clearInterval( this.nID );
		if (this.callback != undefined)
			this.callback();
	}
}



_bsn.Fader.prototype._tween = function(t,b,c,d)
{
	return b + ( (c-b) * (t/d) );
}