var viewType;
var todayDate = new Date();

function Calendar()
{
	this.idEl;
	this.lastId;
	this.colorCellSelected = "LIGHTYELLOW";
	this.nextView;
	this.previousView;
	this.uid = calUid;
	this.cat = '';
	this.currentTime = new Date();
}

Calendar.prototype.dialog = function() {
	var divAddDialog = document.getElementById("divAddDialog");
	if (_dragArea.initEvent > _dragArea.endEvent){
		var temp = _dragArea.initEvent;
		_dragArea.initEvent = _dragArea.endEvent;
		_dragArea.endEvent = temp;
	}

	if(divAddDialog && divAddDialog.style.display != "none"){
		divAddDialog.style.display = "none";
		for (var hour = parseInt(_dragArea.initEvent); hour <= parseInt(_dragArea.endEvent);(hour%100 == 30)?hour+=70:hour+=30)
			try  { document.getElementById(hour).style.background = ""; } catch (e) { break; };
		_dragArea.initEvent = null;
		_dragArea.endEvent = null;
		try {
			document.getElementById("div_main").style.opacity = 1;
			document.getElementById("div_main").filters.alpha.opacity=100;
		} catch (e) {};
	return true;
	}

	var cell = document.getElementById(_dragArea.endEvent);
	try {
		document.getElementById("div_main").style.opacity = 0.5;
		document.getElementById("div_main").filters.alpha.opacity=50;
	} catch (e) {};

	var data = '<text><date>'+calendar.parseDate(id2timeStamp(_dragArea.initEvent))+'</date><time>'+ calendar.parseTime(_dragArea.initEvent,_dragArea.endEvent)+'</time></text>';
	var xsl = XMLTools.load('xsl/addDialog.xsl?'+ Date.parse(new Date));

	if(!divAddDialog) {
		divAddDialog = document.createElement("DIV");
		divAddDialog.id = 'divAddDialog';
		divAddDialog.style.zIndex = "10";
		divAddDialog.style.position = "absolute";
		divAddDialog.style.display = "none";
		document.body.appendChild(divAddDialog);
	}
	divAddDialog.style.left = "300px"; //cell.offsetLeft + document.body.scrollLeft;
	divAddDialog.style.top 	= "200px"; //cell.offsetTop - 100 + document.getElementById('div_main').offsetTop;
	divAddDialog.style.display = "block";
	divAddDialog.innerHTML = xtools.parse(data, xsl);
	var closeButton = document.getElementById('closeDialog');
	if (is_ie)
	{
		closeButton.style.left = '285px';
		closeButton.style.top = '5px';
	}
	else
	{
		closeButton.style.left = '320px';
		closeButton.style.top = '25px';
	}
	document.getElementById('dragEventSubject').focus();
	document.getElementById('addEventLink').alt = get_lang("Add this event");
	document.getElementById('addEventLink').title = get_lang("Add this event");
	document.getElementById('addDetailsLink').alt = get_lang("Add with details");
	document.getElementById('addDetailsLink').title = get_lang("Add with details");


	this.lastId = _dragArea.endEvent;

}
Calendar.prototype.getView = function(idEl, type, viewTime)
{
	if (typeof(type) == 'undefined'){
		type = document.getElementById('calViewType').value;
		if (type.length < 1)
			return false;
		}
	if (typeof(viewTime) == 'undefined'){
		if (document.getElementById('calDateTime').value.length > 0)
			calendar.currentTime.setTime(document.getElementById('calDateTime').value*1000);
		viewTime = calendar.currentTime.getTime();
	}

	if (type == 'Year'){
		var handler = function (data) {
			var div_main = document.getElementById('div_main');
			div_main.innerHTML = data;
		}
		cExecute('../index.php?menuaction=calendar.uicalendar.year&plain=True',handler);
		return;
	}
	this.idEl = idEl;
	var _this = this;
	this.lastId = null;

	var handler_getView = function(XMLdata)
	{
			_this.parseView(XMLdata,type);
			calendar.currentTime.setTime(id2timeStamp(document.getElementById('day').firstChild.id));
			var dayMS = (60*60*24*1000);
			if (viewType == "Week"){
				var previousWeek = new Date;
				previousWeek.setTime(calendar.currentTime.getTime()-(dayMS*7));
				this.previousView = previousWeek.getTime();
				var nextWeek = new Date;
				nextWeek.setTime(calendar.currentTime.getTime()+(dayMS*8));
				this.nextView =	nextWeek.getTime();
			}
			if (viewType == "Day"){
				this.previousView = calendar.currentTime.getTime()-dayMS;
				this.nextView = calendar.currentTime.getTime()+dayMS;
			}
			if (viewType == 'Month'){
				var previousMonth = new Date;
				previousMonth.setTime(calendar.currentTime.getTime());
				previousMonth.setMonth(calendar.currentTime.getMonth()-1);
				this.previousView = previousMonth.getTime();
				var nextMonth = new Date;
                                nextMonth.setTime(calendar.currentTime.getTime());
				nextMonth.setMonth(calendar.currentTime.getMonth()+1);
				this.nextView = nextMonth.getTime();
			}
			document.getElementById("l_date").innerHTML =  "<a href=\"javascript:calendar.getView('div_main','"+viewType+"',this.previousView);\">\<\<&nbsp;</a>";
			if (viewType == "Week")
				document.getElementById("l_date").innerHTML += calendar.parseWeek(id2timeStamp(document.getElementById('day').firstChild.id));
			if  (viewType == "Day")
				document.getElementById("l_date").innerHTML += calendar.parseDate(id2timeStamp(document.getElementById('day').firstChild.id));
			if (viewType == "Month")
				document.getElementById("l_date").innerHTML += 
				"<a href='"+window.location+
				"?viewType=Month"+
				"&datetime="+parseInt(id2timeStamp(document.getElementById('day').firstChild.id)/1000)+
				"'>"+calendar.parseMonth(id2timeStamp(document.getElementById('day').firstChild.id))+"</a>";
			document.getElementById("l_date").innerHTML += "<a href=\"javascript:calendar.getView('div_main','"+viewType+"',this.nextView);\">&nbsp;\>\></a>";

		var getEventsDay = function (data)
		{
			var xsl = XMLTools.load('xsl/events'+type+'.xsl');
			var div = document.getElementById('div_main');
			div.innerHTML += xtools.parse(data, xsl);
			var events = document.getElementById('returnEvents');
			while(typeof(events.firstChild.id) == 'string')
				createEventDiv(events.firstChild);
		}
	        XMLTools.__RETURN_MODE__ = 'XML';
		XMLTools.request('$this.uicalendar.getEvents'+type+"&time="+timeStamp2id(calendar.currentTime.getTime())+'&uid='+calendar.uid+'&cat='+calendar.cat, 'GET', getEventsDay);

	};

	XMLTools.__RETURN_MODE__ = 'XML';
	viewType = type;
	screenTable = new Array();
	XMLTools.request('$this.uicalendar.getView'+type+"&time="+timeStamp2id(viewTime)+'&uid='+this.uid, 'GET', handler_getView);
	};

Calendar.prototype.resetView = function()
{
	document.getElementById("div_main").innerHTML = "";
}

Calendar.prototype.parseView = function(data,type)
{
	var _this = this;
	var div = document.getElementById(this.idEl);
	try {
		var xsl = XMLTools.load('xsl/view'+type+'.xsl?'+ Date.parse(new Date));
		div.innerHTML = xtools.parse(data, xsl);
	}
	catch(e){
		alert(e);
	}

	if (type == 'Week' || type == 'Month')
	{
		var trWeek = document.getElementById('tr_week');
		for (var i=0; i < trWeek.childNodes.length; i++)
			trWeek.childNodes[i].innerHTML = get_lang(trWeek.childNodes[i].innerHTML)+(type=='Week'?" "+id2String((trWeek.childNodes[i].id).substr(8)):"");
	}
};


Calendar.prototype.parseTime = function (first, last) {

	var hour	= first.substring(8,10);
	var minute 	= first.substring(10,12);
	var startHour = hour+":"+minute;
	
	if(last && first != last) {
		hour	= last.substring(8,10);
		minute 	= last.substring(10,12);
	}

	if(minute == "30") {
		hour	= parseInt(hour,10);
		hour	= normDec(hour+1);
		minute 	= "00";
	}
	else {
		minute	= "30";
	}
	return startHour+ " - "+ hour+":"+minute;
}
Calendar.prototype.parseWeek = function (timeStamp) {
	dateObj=new Date();
	dateObj.setTime(timeStamp);
	Year=dateObj.getYear();
	if (Year < 70) { Year=Year*1+2000; }
	if (Year < 1900) { Year=Year*1+1900; }
	Then=new Date(Year, 0, 1);
	Then_Day=Then.getDay();
	Diff=dateObj*1-Then*1;
	Days=Math.floor(Diff/(1000*60*60*24)+(1/24));
	Week=Math.floor((Days+Then_Day)/7)+1;
	return get_lang("Week Number %1 of %2",Week,Year);
}
Calendar.prototype.parseMonth = function (timeStamp) {
	obj=new Date();
	obj.setTime(timeStamp);
	switch(obj.getMonth()) {
		case 0: month = "January"; break;
		case 1: month = "February"; break;
		case 2: month = "March"; break;
		case 3: month = "April"; break;
		case 4: month = "May"; break;
		case 5: month = "June"; break;
		case 6: month = "July"; break;
		case 7: month = "August"; break;
		case 8: month = "September"; break;
		case 9: month = "October"; break;
		case 10: month = "November"; break;
		case 11: month = "December"; break;
		default: month = ""; break;
	}
	return get_lang("%1 of %2",get_lang(month),(obj.getYear()+1900));
}
Calendar.prototype.parseDate = function (timeStamp) {
	var obj = new Date();
	obj.setTime(timeStamp);

	var day;
	switch(obj.getDay()) {  
		case 0: day = "Sunday"; break;  
		case 1: day = "Monday"; break;  
		case 2: day = "Tuesday"; break;  
		case 3: day = "Wednesday"; break;  
		case 4: day = "Thursday"; break;  
		case 5: day = "Friday"; break;  
		case 6: day = "Saturday"; break;  
		default: day = ""; break;
	}

	var month;
	switch(obj.getMonth()) {  
		case 0: month = "January"; break;  
		case 1: month = "February"; break;  
		case 2: month = "March"; break;  
		case 3: month = "April"; break;  
		case 4: month = "May"; break;  
		case 5: month = "June"; break;  
		case 6: month = "July"; break;  
		case 7: month = "August"; break;  
		case 8: month = "September"; break;  
		case 9: month = "October"; break;  
		case 10: month = "November"; break;  
		case 11: month = "December"; break;  
		default: month = ""; break;
	}

	year = (is_ie?parseInt(obj.getYear()):parseInt(obj.getYear())+1900);
	
	return get_lang(day)+", "+obj.getDate()+" "+get_lang("of")+" "+get_lang(month)+" "+get_lang("of")+" "+year; // FIXME USE FORMAT DATE AS PREFERENCE
}
var calendar = new Calendar();

// This array stores the events in table to avoid conflict in screen
var screenTable = new Array();
var today = new Date();
var weekDay = today.getDay();
function createEventDiv(eventDiv){
	eventDiv.className = "event_div";
	eventDiv.style.height = parseInt(eventDiv.childNodes[1].id-eventDiv.childNodes[0].id)/120000+"px";
	var end_ = timeStamp2id(eventDiv.childNodes[1].id).substr(8);
	var start_ = parseInt(timeStamp2id(eventDiv.childNodes[0].id).substr(8),10);
	if (viewType == "Day"){
		if (!screenTable[weekDay])
			screenTable[weekDay] = new Array();
		eventDiv.style.width = "190px";

		currentPos = 1;
		for (var hour = parseInt(start_,10); hour < parseInt(end_,10);(hour%100 == 30)?hour+=70:hour+=30){
			if (!screenTable[weekDay][hour])
				screenTable[weekDay][hour] = 0;

			if (currentPos <= screenTable[weekDay][hour])
				currentPos = screenTable[weekDay][hour]+1;
		}
		for (var hour = parseInt(start_,10); hour < parseInt(end_,10);(hour%100 == 30)?hour+=70:hour+=30)
			screenTable[weekDay][hour] = currentPos;
		eventDiv.style.left  = 260+(205*(currentPos-1)) + "px" ;
		eventDiv.onmouseover = function(){ createButtons(eventDiv); };
		eventDiv.onmouseout = function(){ removeButtons(eventDiv); };
		var resizeDiv = document.createElement('DIV');
		resizeDiv.id = "resize_" + eventDiv.id;
		resizeDiv.className = 'resize_div';
		resizeDiv.onmousedown = function() { resizeEvent(eventDiv); };
		eventDiv.appendChild(resizeDiv);
	}
	if (viewType == "Week"){
		var tempDate = new Date;
		tempDate.setTime(eventDiv.childNodes[1].id);
		if (!screenTable[tempDate.getDay()])
			screenTable[tempDate.getDay()] = new Array();
		currentPos = 1;
		if (!screenTable[tempDate.getDay()][start_])
			screenTable[tempDate.getDay()][start_] = 0;

		if (currentPos <= screenTable[tempDate.getDay()][start_])
			currentPos = screenTable[tempDate.getDay()][start_]+1;
		screenTable[tempDate.getDay()][start_] = currentPos;

		var widthValue = 100;
		eventDiv.style.width = widthValue+"px";

		var headerElement = document.getElementById('weekday_'+timeStamp2id(eventDiv.childNodes[1].id).substr(0,8));
		if (currentPos > 1)
			eventDiv.style.left = (10+(tempDate.getDay()*122)+(widthValue*currentPos))+"px";
		headerElement.style.width = (widthValue*currentPos)+"px";
		eventDiv.style.height = "20px";
		eventDiv.style.cursor = "pointer";
		eventDiv.onmouseover = function () { this.style.height = "auto"; this.style.zIndex = 2;};
		eventDiv.onmouseout = function () { this.style.height = "20px"; this.style.zIndex = 1; };
		eventDiv.onclick = function () { calendar.getView('div_main','Day',eventDiv.childNodes[1].id); };
	}
	var tdElement = document.getElementById(timeStamp2id(eventDiv.childNodes[0].id));

	if (viewType == "Month"){
		var tdElement = document.getElementById(timeStamp2id(eventDiv.childNodes[0].id).substr(0,8)+'0000');
		eventDiv.style.width = "60px";
		eventDiv.style.height = "30px";
		eventDiv.onmouseover = function () { if (this.childNodes[2].length > 20) { this.style.width = "120px"; this.style.height = "auto"; }  this.style.zIndex = 2; };
		eventDiv.onmouseout = function () { this.style.height = "30px"; this.style.width = "60px"; this.style.zIndex = 1; };
		eventDiv.onclick = function () { calendar.getView('div_main','Day',eventDiv.childNodes[1].id); };
		eventDiv.style.cursor = "pointer";

		tdElement.style.height = (tdElement.childNodes.length * 10) + "px";

		eventDiv.style.margin = (tdElement.childNodes.length-1)*25+" 0 0 "+(20+(tdElement.childNodes.length-1)*25);
		tdElement.style.height = parseInt(tdElement.childNodes.length)*30;
	}
	if (tdElement == null)
	{
		orphan_table = document.getElementById('orphan_table');
		if (!orphan_table)
		{
			orphan_table = document.createElement('table');
			orphan_table.id = "orphan_table";
			orphan_table.className = "table_common";
			orphan_table.innerHTML = "<tbody></tbody>";
			document.getElementById('div_main').appendChild(orphan_table);

		}
		tr_el = document.createElement('TR');
		td_el = document.createElement('TD');
		td_el.className = "td_header";
		td_el.innerHTML = get_lang("Out of table preferences");
		tr_el.appendChild(td_el);
		td_el = document.createElement('TD');
		td_el.className = "td_common";
		tr_el.appendChild(td_el);
		eventDiv.style.position = "relative";
		td_el.appendChild(eventDiv);
		orphan_table.firstChild.appendChild(tr_el);
	}
	else
	{
		eventDiv.style.top  =  (tdElement.offsetTop + 160) + "px";
		tdElement.appendChild(eventDiv);
	}
}