/**
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *              1.3 - 2006-12-04
 *              2.0 - 2007-02-07
 */
includeOnce("/javascript/dom.js");
includeOnce("/javascript/css.js");
includeOnce("/javascript/events.js");

function attachAutoSuggest() {
	for(var i=0;i<document.forms.length;i++)
		for(var j=0;j<document.forms[i].length;j++)
			attachAutoSuggest_Field(document.forms[i][j]);
}

function attachAutoSuggest_Field(fieldObj) {
	var fa = fieldObj.getAttribute("autosuggest");
	var fc = fieldObj.getAttribute("callback");
	if(fa==null) fa=false;
	if(fc==null) fc=false;
	
	if(fa) {
		includeOnce("/javascript/autosuggest.css");
		var options_xml = {
			script: function (fieldObj) { return "/javascript/autosuggest.cfm?list="+fieldObj.getAttribute('autosuggest')+"&filter=" + fieldObj.getAttribute('filter') + "&q="+fieldObj.value; },
			minchars: 1,
			timeout:10000,
			callback: (fc?window[fc]:null)
		};
		var as_xml = new _bsn.AutoSuggest(fieldObj, options_xml);
	}
}

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


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

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

	if (!this.fld) return false;

	// init variables
	this.sInput 		= "";
	this.nInputChars 	= 0;
	this.aSuggestions 	= [];
	this.iHighlighted 	= 0;
	
	// parameters object
	this.oP = (param) ? param : {};
	
	// defaults	
	var def = {minchars:1, meth:"get", varname:"input", className:"autosuggest", timeout:2500, delay:500, offsety:0, shownoresults: false, noresults: "No results!", maxheight: 250, cache: true};
	for (k in def)
		if (typeof(this.oP[k]) != typeof(def[k]))	this.oP[k] = def[k];
	

	// set keyup handler for field
	// and prevent autocomplete from client
	var p = this;
	
	// NOTE: not using addEventListener because UpArrow fired twice in Safari
	//_bsn.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );
	addEvent(this.fld,'keypress',function(ev){ return p.onKeyPress(ev); });
	this.fld.onkeyup 	= function(ev){ return p.onKeyUp(ev); }
	addEvent(this.fld,'blur',function(ev) { return p.clearSuggestions(); });
	
	this.fld.setAttribute("autocomplete","off");
}

_bsn.AutoSuggest.prototype.onKeyPress = function(ev) {
	var key = getKeyFromEvent(ev);
	var RETURN = 13;
	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 = getKeyFromEvent(ev);
	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;
	
	// if the input length is less than the min required to trigger a request
	// reset input string and 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].value.toLowerCase().indexOf(val.toLowerCase())>-1) {
				arr.push( this.aSuggestions[i] );
			} else if (this.aSuggestions[i].info != null && this.aSuggestions[i].info.toLowerCase().indexOf(val.toLowerCase())>-1) {
				//arr.push( this.aSuggestions[i] );
			}
		}
		
		for (var i=0;i<this.aSuggestions.length;i++)	{
			if (this.aSuggestions[i].value.toLowerCase().indexOf(val.toLowerCase())>-1) {
				
			} else if (this.aSuggestions[i].info != null && this.aSuggestions[i].info.toLowerCase().indexOf(val.toLowerCase())>-1) {
				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
	if (typeof(this.oP.script) == "function")
		var url = this.oP.script(this.fld);
	else
		var url = this.oP.script+this.oP.varname+"="+escape(this.fld.value);
	
	if (!url) return false;
	
	var meth = this.oP.meth;
	
	var onSuccessFunc = function (req) { pointer.setSuggestions(req) };
	var onErrorFunc = function (status) {  };

	var myAjax = new _bsn.Ajax();
	myAjax.makeRequest( url, meth, onSuccessFunc, 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())
				this.aSuggestions.push(  { 'id':results[i].getAttribute('id'), 'value':results[i].childNodes[0].nodeValue, 'info':results[i].getAttribute('info') }  );
		}
	
	}
	
	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
	DOM.remE(this.idAs);
	this.killTimeout();
	
	// if no results, and shownoresults is false, do nothing
	if (arr.length == 0 && !this.oP.shownoresults) return false;

	// create holding div
	var div = DOM.cE("div", {id:this.idAs, className:this.oP.className});	

	// create and populate ul
	var ul = DOM.cE("ul", {id:"as_ul"});
	
	// loop throught arr of suggestions
	// creating an LI element for each suggestion
	for (var i=0;i<arr.length;i++) 	{
		// format output with the input enclosed in a EM element
		// (as HTML, not DOM)
		var val = arr[i].value;
		var st = val.toLowerCase().indexOf( this.sInput.toLowerCase() );
		if(st>-1) {
			var output = val.substring(0,st) + "<em>" + val.substring(st, st+this.sInput.length) + "</em>" + val.substring(st+this.sInput.length);
		} else {
			var output = val;
		}
		
		var span 		= DOM.cE("span", {}, output, true);
		if (arr[i].info != "") 		{
			var small	= DOM.cE("small", {}, "<br />"+arr[i].info,true);
			span.appendChild(small);
		}
		
		var a 	= DOM.cE("a", { href:"#" });		
		var tl 	= DOM.cE("span", {className:"tl"}, " ");
		var tr 	= DOM.cE("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 	= DOM.cE(  "li", {}, a  );

		ul.appendChild( li );
	}
	
	// handle bottom border with differnt sizes
	if(i>7) {
		CSS.setStyle(div, 'border-bottom', 'thin black solid') 
	} else {
		CSS.setStyle(div, 'border-bottom', 'none') 
	}
	// no results
	if (arr.length == 0 && this.oP.shownoresults)	{
		var li 			= DOM.cE(  "li", {className:"as_warning"}, this.oP.noresults  );
		ul.appendChild( li );
	}
	
	div.appendChild( ul );
	
	var fcorner = DOM.cE("div", {className:"as_corner"});
	var fbar = DOM.cE("div", {className:"as_bar"});
	var footer = DOM.cE("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 = DOM.getPos(this.fld);
	
	div.style.left 		= pos.x + "px";
	div.style.top 		= ( pos.y + this.fld.offsetHeight + this.oP.offsety ) + "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);

	if(div.offsetWidth<this.fld.offsetWidth) div.style.width 	= this.fld.offsetWidth + "px";
	if(div.offsetWidth>(this.fld.offsetWidth*2)) div.style.width 	= (this.fld.offsetWidth*2) + "px";

	div.style.width 	= this.fld.offsetWidth + "px";

	// currently no item is highlighted
	this.iHighlighted = 0;
	//this.setHighlight(1);
	
	// remove list after an interval
	var pointer = this;
	
	//Matt added this to make timeouts optional - 9/18/2007
	if(this.oP.useTimeOut == null){this.oP.useTimeOut = true;}
	
	if(this.oP.useTimeOut){
		this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
	}
	else{
		this.toID = null;
	}
	//End of Matt's addition - 9/18/2007
	
	//Matt removed this to make timeouts optional - 9/18/2007
	//this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
}

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

	if (key == 40)	n = this.iHighlighted + 1;
	if (key == 38)	n = this.iHighlighted - 1;
	
	if (n > list.childNodes.length)		n = list.childNodes.length;
	if (n < 1)	{	n = 0; this.clearHighlight(); }
	
	this.setHighlight(n);
}

_bsn.AutoSuggest.prototype.setHighlight = function(n) {
	var list = $("as_ul");
	if (!list) return false;
	
	if (this.iHighlighted > 0) this.clearHighlight();
	
	this.iHighlighted = Number(n);
	var child = list.childNodes[this.iHighlighted-1];	
	var div = list.parentNode;
	var st = div.scrollTop;	
	var ot = child.offsetTop;
	var dch = div.clientHeight;
	var cch = child.clientHeight;

	child.className = "as_highlight";

	if(ot>=st+dch-cch) {	div.scrollTop = ot-dch+cch; }
	if(ot<st) {	div.scrollTop = ot; }

	this.killTimeout();
}

_bsn.AutoSuggest.prototype.clearHighlight = function(){
	var list = $("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)	{
		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() {
	//Matt added the condition around this so that we could have optional timeouts - 9/18/2007
	if(this.toID != null){
		clearTimeout(this.toID);
	}
}

_bsn.AutoSuggest.prototype.resetTimeout = function() {
	//Matt added the condition statement around this clear timeout to make timeouts optional - 9/18/2007
	if(this.toID != null){
		clearTimeout(this.toID);
	}
	var pointer = this;
	
	//Matt added this so enable the option of having a timeout - 9/18/2007
	if(this.oP.useTimeOut == null){this.oP.useTimeOut = true;}
	
	if(this.oP.useTimeOut){
		this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
	}
	else{
		this.toID = null;
	}
	//End of Matt's addition - 9/18/2007
	
	//Matt removed this so that we don't have to have a timeout anymore if we didn't want it - 9/18/2007
	//this.toID = setTimeout(function () { pointer.clearSuggestions() }, 1000);
}

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

// AJAX PROTOTYPE _____________________________________________
if (typeof(_bsn.Ajax) == "undefined") _bsn.Ajax = {}

_bsn.Ajax = function () {
	this.req = {};
	this.isIE = false;
}

_bsn.Ajax.prototype.makeRequest = function (url, meth, onComp, onErr){
	if (meth != "POST")	meth = "GET";
	
	this.onComplete = onComp;
	this.onError = onErr;
	
	var pointer = this;
	
	// branch for native XMLHttpRequest object
	if (window.XMLHttpRequest)	{
		this.req = new XMLHttpRequest();
		this.req.onreadystatechange = function () { pointer.processReqChange() };
		this.req.open("GET", url, true); //
		this.req.send(null);
	// branch for IE/Windows ActiveX version
	} else if (window.ActiveXObject) {
		this.req = new ActiveXObject("Microsoft.XMLHTTP");
		if (this.req) {
			this.req.onreadystatechange = function () { pointer.processReqChange() };
			this.req.open(meth, url, true);
			this.req.send();
		}
	}
}

_bsn.Ajax.prototype.processReqChange = function() {
	// only if req shows "loaded"
	if (this.req.readyState == 4) {
		// only if "OK"
		if (this.req.status == 200)	{
			this.onComplete( this.req );
		} else {
			this.onError( this.req.status );
		}
	}
}

// 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) );
}

addEvent(window, 'load', attachAutoSuggest);