/**
 * author: Timothy Groves - http://www.brandspankingnew.net version: 1.2 -
 * 2006-11-17 1.3 - 2006-12-04 2.0 - 2007-02-07 2.1.1 - 2007-04-13 2.1.2 -
 * 2007-07-07 2.1.3 - 2007-07-19
 * 
 */

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

if (typeof(_b.Autosuggest) == "undefined")
	_b.Autosuggest = {};
else
	alert("Autosuggest is already set!");

_b.AutoSuggest = function(id, param) {
	// no DOM - give up!
	//
	if (!document.getElementById)
		return 0;

	// get field via DOM
	//
	this.fld = _b.DOM.gE(id);

	if (!this.fld)
		return 0;

	// init variables
	//
	this.sInp = "";
	this.nInpC = 0;
	this.aSug = [];
	this.iHigh = 0;

	// parameters object
	//
	this.oP = param ? param : {};

	// defaults
	//
	var k, def = {
		minchars : 2,
		meth : "get",
		varname : "input",
		className : "autosuggest",
		timeout : 2500,
		delay : 500,
		offsety : -5,
		shownoresults : true,
		noresults : "No results!",
		maxheight : 250,
		cache : true,
		maxentries : 25
	};
	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
	// _b.DOM.addEvent( this.fld, 'keyup', function(ev){ return
	// pointer.onKeyPress(ev); } );

	this.fld.onkeypress = function(ev) {
		return p.onKeyPress(ev);
	};
	this.fld.onkeyup = function(ev) {
		return p.onKeyUp(ev);
	};

	this.fld.setAttribute("autocomplete", "off");
};

_b.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 = 1;

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

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

	return bubble;
};

_b.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 = 1;

	switch (key) {

		case ARRUP :
			this.changeHighlight(key);
			bubble = 0;
			break;

		case ARRDN :
			this.changeHighlight(key);
			bubble = 0;
			break;

		default :
			//FR provient_liste=0 car la valeur ne provient pas de la sélection d'un élément de la liste, mais d'une saisie utilisateur
			//EN provient_liste=0 because the value doesn't come from the list ; it is typed by the user
			this.fld.setAttribute('provient_liste', 0);
			this.getSuggestions(this.fld.value);
	}

	return bubble;

};

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

	// if input stays the same, do nothing
	//
	if (val == this.sInp)
		return 0;

	// kill list
	//
	_b.DOM.remE(this.idAs);

	this.sInp = val;

	// input length is less than the min required to trigger a request
	// do nothing
	//
	if (val.length < this.oP.minchars) {
		this.aSug = [];
		this.nInpC = val.length;
		return 0;
	}

	var ol = this.nInpC; // old length
	this.nInpC = val.length ? val.length : 0;

	// if caching enabled, and user is typing (ie. length of input is
	// increasing)
	// filter results out of aSuggestions from last request
	//
	var l = this.aSug.length;
	if (this.nInpC > ol && l && l < this.oP.maxentries && this.oP.cache) {
		var arr = [];
		for (var i = 0; i < l; i++) {
			if (this.aSug[i].value.substr(0, val.length).toLowerCase() == val.toLowerCase())
				arr.push(this.aSug[i]);
		}
		this.aSug = arr;
		
		this.createList(this.aSug);

		return false;
	} else
	// do new request
	//
	{
		var pointer = this;
		var input = this.sInp;
		clearTimeout(this.ajID);
		this.ajID = setTimeout(function() {
					pointer.doAjaxRequest(input)
				}, this.oP.delay);
	}

	return false;
};

_b.AutoSuggest.prototype.doAjaxRequest = function(input) {
	// check that saved input is still the value of the field
	//
	if (input != this.fld.value)
		return false;

	var pointer = this;

	// create ajax request
	//
	if (typeof(this.oP.script) == "function")
		var url = this.oP.script(encodeURIComponent(this.sInp));
	else
		var url = this.oP.script + this.oP.varname + "="
				+ encodeURIComponent(this.sInp);

	if (!url)
		return false;

	var meth = this.oP.meth;
	var input = this.sInp;

	var onSuccessFunc = function(req) {
		pointer.setSuggestions(req, input)
	};
	var onErrorFunc = function(status) {
		alert("AJAX error: " + status);
	};

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

_b.AutoSuggest.prototype.setSuggestions = function(req, input) {
	// if field input no longer matches what was passed to the request
	// don't show the suggestions
	Debug.Log('input : ' + input + ' : ' + req.responseText, 2);
	if (input != this.fld.value)
		return false;

	this.aSug = [];

	if (this.oP.json) {
		var jsondata = eval('(' + req.responseText + ')');
		
		for (var i = 0; i < jsondata.results.length; i++) {
			var nom_ss_doublon='';
			//FR si celui d'avant ou celui d'après a exactement le même libellé alors on affecte à nom_ss_doublon un nom qui évite les confusions
			//EN if the one before or the one after has exactly the same name, then a name which avoid confusion is affected to nom_ss_doublon
			if ( (i==0 && jsondata.results.length>1 && jsondata.results[i].value.toLowerCase()==jsondata.results[i+1].value.toLowerCase())
			     || (i>0 && (jsondata.results[i].value.toLowerCase()==jsondata.results[i-1].value.toLowerCase() || 
						     (jsondata.results.length>(i+1) && jsondata.results[i].value.toLowerCase()==jsondata.results[i+1].value.toLowerCase()))) )
			{	nom_ss_doublon=jsondata.results[i].value+' '+jsondata.results[i].info;}
			
			this.aSug.push({
						'id' : jsondata.results[i].id,
						'value' : jsondata.results[i].value,
						'info' : jsondata.results[i].info,
						'type' : jsondata.results[i].type,
						'nom_ss_doublon' : nom_ss_doublon
					});
		}
	} 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.aSug.push({
							'id' : results[i].getAttribute('id'),
							'value' : results[i].childNodes[0].nodeValue,
							'info' : results[i].getAttribute('info'),
							'type' : results[i].getAttribute('type')
						});
		}

	}

	this.idAs = "as_" + this.fld.id;

	this.createList(this.aSug);

};

_b.AutoSuggest.prototype.createList = function(arr) {
	var pointer = this;

	// get rid of old list
	// and clear the list removal timeout
	//
	_b.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 = _b.DOM.cE("div", {
				id : this.idAs,
				className : this.oP.className
			});

	var hcorner = _b.DOM.cE("div", {
				className : "as_corner"
			});
	var hbar = _b.DOM.cE("div", {
				className : "as_bar"
			});
	var header = _b.DOM.cE("div", {
				className : "as_header"
			});
	header.appendChild(hcorner);
	header.appendChild(hbar);
	div.appendChild(header);

	// create and populate ul
	//
	var ul = _b.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.sInp.toLowerCase());
		var output = val.substring(0, st) + "<em>"
				+ val.substring(st, st + this.sInp.length) + "</em>"
				+ val.substring(st + this.sInp.length);

		var span = _b.DOM.cE("span", {}, output, true);
		if (arr[i].info != "") {
			var nbsp = document.createTextNode('\u00A0');
			span.appendChild(nbsp);
			var small = _b.DOM.cE("small", {}, arr[i].info);
			span.appendChild(small);
		}

		var a = _b.DOM.cE("a", {
					href : "#"
				});

		var tl = _b.DOM.cE("span", {
					className : "tl"
				}, " ");
		var tr = _b.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 = _b.DOM.cE("li", {}, a);

		ul.appendChild(li);
	}

	// no results
	//
	if (arr.length == 0 && this.oP.shownoresults) {
		var li = _b.DOM.cE("li", {
					className : "as_warning"
				}, this.oP.noresults);
		ul.appendChild(li);
	}

	div.appendChild(ul);

	var fcorner = _b.DOM.cE("div", {
				className : "as_corner"
			});
	var fbar = _b.DOM.cE("div", {
				className : "as_bar"
			});
	var footer = _b.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 = _b.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";

	// 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.iHigh = 0;

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

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

	var n;

	if (key == 40)
		n = this.iHigh + 1;
	else if (key == 38)
		n = this.iHigh - 1;

	if (n > list.childNodes.length)
		n = list.childNodes.length;
	if (n < 1)
		n = 1;

	this.setHighlight(n);
};

_b.AutoSuggest.prototype.setHighlight = function(n) {
	var list = _b.DOM.gE("as_ul");
	if (!list)
		return false;

	if (this.iHigh > 0)
		this.clearHighlight();

	this.iHigh = Number(n);

	list.childNodes[this.iHigh - 1].className = "as_highlight";

	this.killTimeout();
};

_b.AutoSuggest.prototype.clearHighlight = function() {
	var list = _b.DOM.gE("as_ul");
	if (!list)
		return false;

	if (this.iHigh > 0) {
		list.childNodes[this.iHigh - 1].className = "";
		this.iHigh = 0;
	}
};

_b.AutoSuggest.prototype.setHighlightedValue = function() {
	if (this.iHigh) {
		this.sInp = this.fld.value = this.aSug[this.iHigh - 1].value;

		// move cursor to end of input (safari)
		//
		this.fld.focus();
		if (this.fld.selectionStart)
			this.fld.setSelectionRange(this.sInp.length, this.sInp.length);

		this.clearSuggestions();

		// pass selected object to callback function, if exists
		//
		if (typeof(this.oP.callback) == "function")
			this.oP.callback(this.aSug[this.iHigh - 1], this.fld.id); // sèb : ajout de this.fld.id, pour permettre dans la fonction callback de savoir à quoi on a affaire
	}
};

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

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

_b.AutoSuggest.prototype.clearSuggestions = function() {

	this.killTimeout();

	var ele = _b.DOM.gE(this.idAs);
	var pointer = this;
	if (ele) {
		var fade = new _b.Fader(ele, 1, 0, 250, function() {
					_b.DOM.remE(pointer.idAs)
				});
	}
};

// AJAX PROTOTYPE _____________________________________________

if (typeof(_b.Ajax) == "undefined")
	_b.Ajax = {};

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

_b.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();
		}
	}
};

_b.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);
		}
	}
};

// DOM PROTOTYPE _____________________________________________

if (typeof(_b.DOM) == "undefined")
	_b.DOM = {};

/* create element */
_b.DOM.cE = function(type, attr, cont, html) {
	var ne = document.createElement(type);
	if (!ne)
		return 0;

	for (var a in attr)
		ne[a] = attr[a];

	var t = typeof(cont);

	if (t == "string" && !html)
		ne.appendChild(document.createTextNode(cont));
	else if (t == "string" && html)
		ne.innerHTML = cont;
	else if (t == "object")
		ne.appendChild(cont);

	return ne;
};

/* get element */
_b.DOM.gE = function(e) {
	var t = typeof(e);
	if (t == "undefined")
		return 0;
	else if (t == "string") {
		var re = document.getElementById(e);
		if (!re)
			return 0;
		else if (typeof(re.appendChild) != "undefined")
			return re;
		else
			return 0;
	} else if (typeof(e.appendChild) != "undefined")
		return e;
	else
		return 0;
};

/* remove element */
_b.DOM.remE = function(ele) {
	var e = this.gE(ele);

	if (!e)
		return 0;
	else if (e.parentNode.removeChild(e))
		return true;
	else
		return 0;
};

/* get position */
_b.DOM.getPos = function(e) {
	var e = this.gE(e);

	var obj = e;

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

	var obj = e;

	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(_b.Fader) == "undefined")
	_b.Fader = {};

_b.Fader = function(ele, from, to, fadetime, callback) {
	if (!ele)
		return 0;

	this.e = ele;

	this.from = from;
	this.to = to;

	this.cb = callback;

	this.nDur = fadetime;

	this.nInt = 50;
	this.nTime = 0;

	var p = this;
	this.nID = setInterval(function() {
				p._fade()
			}, this.nInt);
};

_b.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.e.filters) // internet explorer
	{
		try {
			this.e.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.e.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='
					+ ieop + ')';
		}
	} else // other browsers
	{
		this.e.style.opacity = op;
	}

	if (this.nTime == this.nDur) {
		clearInterval(this.nID);
		if (this.cb != undefined)
			this.cb();
	}
};

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