/**
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *
 *	requires:	bsn.DOM.js
 *				bsn.Ajax.js
 *
 */

var useBSNns;

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

if (typeof(_bsn.DOM) == "undefined") {
	_bsn.DOM = {}
}
	
_bsn.AutoSuggest = function (fldID, param) {
	if (!document.getElementById) {
		return false;
	}
	
	this.fld = _bsn.DOM.getElement(fldID);

	if (!this.fld) {
		return false;
	}		
		
	this.nInputChars = 0;
	this.aSuggestions = [];
	this.aPictures = [];
	this.aAnzahl= [];
	this.iHighlighted = 0;
	
	
	// parameters object
	this.oP = (param) ? param : {};
	// defaults	
	if (!this.oP.minchars)		this.oP.minchars = 2;
	if (!this.oP.method)		this.oP.meth = "get";
	if (!this.oP.varname)		this.oP.varname = "input";
	if (!this.oP.formularname)		this.oP.formularname = "";
	if (!this.oP.className)		this.oP.className = "autosuggest";
	if (!this.oP.timeout)		this.oP.timeout = 5000;
	if (!this.oP.delay)			this.oP.delay = 200;
	if (!this.oP.maxheight && this.oP.maxheight !== 0)		this.oP.maxheight = 400;
	if (!this.oP.cache)			this.oP.cache = true;
	
	var pointer = this;
	
	this.fld.onkeyup = function () { pointer.getSuggestions( this.value ) };
	this.fld.setAttribute("autocomplete","off");
}

_bsn.AutoSuggest.prototype.getSuggestions = function (val) {

	if (val.length == this.nInputChars) {
		return false;
	}	
	if (val.length < this.oP.minchars) {
		this.nInputChars = val.length;
		this.aSuggestions = [];
		this.aPictures = [];
		this.aAnzahl=[];
		this.clearSuggestions();
		return false;
	}
		
	if (val.length>this.nInputChars && this.aSuggestions.length && this.oP.cache) {
		// get from cache
		var arr = [];
		var pictures=[];
		var anzahl=[];
		for (var i=0;i<this.aSuggestions.length;i++) {
			if (this.aSuggestions[i].substr(0,val.length).toLowerCase() == val.toLowerCase()) {
				arr.push( this.aSuggestions[i] );
				pictures.push( this.aPictures[i] );
				anzahl.push( this.aAnzahl[i] );
			}
		}
		
		this.nInputChars = val.length;
		this.aSuggestions = arr;
		this.aPictures=pictures;
		this.aAnzahl=anzahl;
		
		this.createList( this.aSuggestions, this.aPictures ,this.aAnzahl);
		
		return false;
	}
		
	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) { return true; };

	var myAjax = new _bsn.Ajax;
	myAjax.makeRequest( url, meth, onSuccessFunc, onErrorFunc );
}

_bsn.AutoSuggest.prototype.setSuggestions = function (req) {
	
	var xml = req.responseXML;
	
	// traverse xml
	//
	this.aSuggestions = [];
	this.aPictures=[];
	this.aAnzahl=[];
	var results = xml.getElementsByTagName('results')[0].childNodes;
	var vorschlag=0;
	var merken="";
	var anzahl="";
	var titel="";
	for (var i=0;i<results.length;i++) {
		if (results[i].hasChildNodes()) {
			anzahl=results[i].getElementsByTagName("anzahl")[0].childNodes[0].nodeValue;
			titel=results[i].getElementsByTagName("titel")[0].childNodes[0].nodeValue;
			merken=results[i].getElementsByTagName("bild")[0].childNodes[0].nodeValue;

			this.aSuggestions.push(titel);

			this.aAnzahl.push(anzahl);

			if (merken!="") {
				merken="/images/thumbs/"+merken+".jpg";
			}
			this.aPictures.push(merken);
		}
	}
	
	this.idAs = "as_"+this.fld.id;
	
	this.createList(this.aSuggestions, this.aPictures, this.aAnzahl);
}

_bsn.AutoSuggest.prototype.createList = function(arr, pictures, anzahl) {
	// clear previous list
	//
	this.clearSuggestions();

	// create and populate ul
	//
	var ul = _bsn.DOM.createElement("ul", {id:this.idAs, className:this.oP.className});
	
	
	var pointer = this;
	for (var i=0;i<arr.length;i++) {
		var a = _bsn.DOM.createElement("a", { href:"#"}, "");
		
		var idSpan="span_"+i;
		var txt = _bsn.DOM.createElement("span", { id:idSpan } ,arr[i]);
		if (pictures[i]) {
			var image = document.createElement('img');
			image.src=pictures[i];
			image.border=0;
			image.width=25;
			image.height=25;
			a.appendChild(image);
		}

		a.appendChild(txt);
		
		if (anzahl[i]>1) {
			var anzahltext = _bsn.DOM.createElement("span", {}," ("+anzahl[i]+" Treffer)");
			a.appendChild(anzahltext);
		}
		
		if (this.oP.formularname!="") {
			a.onclick = function () { 
				pointer.setValue( this.getElementsByTagName("span")[0].childNodes[0].nodeValue ); 
				document.sformular.submit();
				return false; 
			}
		} else {
			a.onclick = function () { 
				pointer.setValue( this.getElementsByTagName("span")[0].childNodes[0].nodeValue ); 
				return false; 
			}
		}
		var li = _bsn.DOM.createElement(  "li", {}, a  );
		ul.appendChild(  li );
	}
	
	var pos = _bsn.DOM.getPos(this.fld);
	
	ul.style.left = pos.x + "px";
	ul.style.top = ( pos.y + this.fld.offsetHeight ) + "px";
	ul.style.width = (this.fld.offsetWidth+140) + "px";
	ul.onmouseover = function(){ pointer.killTimeout() }
	ul.onmouseout = function(){ pointer.resetTimeout() }


	document.getElementsByTagName("body")[0].appendChild(ul);
	
	if (ul.offsetHeight > this.oP.maxheight && this.oP.maxheight != 0) {
		ul.style['height'] = this.oP.maxheight + "px";
	}
	
	
	var TAB = 9;
	var ESC = 27;
	var KEYUP = 38;
	var KEYDN = 40;
	var RETURN = 13;
	
	this.fld.onkeydown = function(ev) {
		var key = (window.event) ? window.event.keyCode : ev.keyCode;

		switch(key) {
			case TAB:
			pointer.setHighlightedValue();
			break;

			case RETURN:
			pointer.setHighlightedValue();
			break;

			case ESC:
			pointer.clearSuggestions();
			break;

			case KEYUP:
			pointer.changeHighlight(key);
			return false;
			break;

			case KEYDN:
			pointer.changeHighlight(key);
			return false;
			break;
		}

	};

	this.iHighlighted = 0;
	
	
	// remove autosuggest after an interval
	//
	clearTimeout(this.toID);
	var pointer = this;
	this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
}

_bsn.AutoSuggest.prototype.changeHighlight = function(key) {
	var list = _bsn.DOM.getElement(this.idAs);
	if (!list) {
		return false;
	}
	
	if (this.iHighlighted > 0) {
		list.childNodes[this.iHighlighted-1].className = "";
	}
	if (key == 40) {
		this.iHighlighted ++;
	} else if (key = 38) {
		this.iHighlighted --;
	}
	
	if (this.iHighlighted > list.childNodes.length)
		this.iHighlighted = list.childNodes.length;
	if (this.iHighlighted < 1)
		this.iHighlighted = 1;
	
	list.childNodes[this.iHighlighted-1].className = "highlight";
	
	//alert( list.childNodes[this.iHighlighted-1].firstChild.firstChild.nodeValue );
	
	this.killTimeout();
}

_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 () {
	if (document.getElementById(this.idAs)) {
		_bsn.DOM.removeElement(this.idAs);
	}
	this.fld.onkeydown = null;
}

_bsn.AutoSuggest.prototype.setHighlightedValue = function () {
	if (this.iHighlighted) {
//		this.fld.value = document.getElementById(this.idAs).childNodes[this.iHighlighted-1].firstChild.firstChild.nodeValue;
		var idSpan="span_"+(this.iHighlighted-1);
		this.fld.value = document.getElementById(idSpan).firstChild.nodeValue;
		this.killTimeout();
		this.clearSuggestions();
	}
}

_bsn.AutoSuggest.prototype.setValue = function (val) {
	this.fld.value = val;
	this.resetTimeout();
}