// DHTML Calendar
// $Author: Karl Agius $
// $Date: 2005/02/15 21:54:32 $
// $Revision: 1.1 $

function Calendar (cname, id, date) {

	// Used to notify the calendar that it is attached to a single html field.
	this.fallback_single = 0;
	
	// Used to notify the claendar that it is attached to 3 html fields.
	this.fallback_multi = 1;
	
	// Used to notify the calendar that it is attached to both field sets.
	this.fallback_both = 2;
	
	// Read-only calendar
	this.viewOnly = false;
	
	// Allows the user to select weekends
	this.allowWeekends = true;
	
	// Allows the user to select weekdays
	this.allowWeekdays = true;
	
	// The minimum date that the user can select (inclusive)
	this.minDate = "--";
	
	// The maximum date that the user can select (exclusive)
	this.maxDate = "--";
	
	// Allow the user to scroll dates
	this.scrolling = true;
	
	// The id of this calendar
	this.name = cname;
	
	// The first day of the week in the calendar (0-Sunday, 6-Saturday)
	this.firstDayOfWeek = 1;
	
	// Fallback method
	this.fallback = this.fallback_both;
	
	// Sets the date and strips out time information
	this.calendarDate = date;
	this.calendarDate.setUTCHours(0);
	this.calendarDate.setUTCMinutes(0);
	this.calendarDate.setUTCSeconds(0);
	this.calendarDate.setUTCMilliseconds(0);
	
	// The field id that the calendar is attached to.
	// For single input, this is used "as is". for the
	// Multi-input, it is given a suffix for _day, _month
	// and _year inputs.
	this.attachedId = id;
	
	// The left and right month control icons
	this.controlLeft = "«";
	this.controlRight = "»";
		
	// The left and right month control icons (when disabled)
	this.controlLeftDisabled = "";
	this.controlRightDisabled = "";
	
	// The css classes for the calendar and header
	this.calendarStyle = "cal_calendar";
	this.headerStyle = "cal_header";
	this.headerCellStyle = "cal_cell";
	this.headerCellStyleLabel = "cal_labelcell";
	
	// The css classes for the rows
	this.weekStyle = "cal_week";
	this.evenWeekStyle = "cal_evenweek";
	this.oddWeekStyle = "cal_oddweek";
	
	// The css classes for the day elements
	this.dayStyle = "cal_day";
	this.disabledDayStyle = "cal_disabled";
	this.commonDayStyle = "cal_common";
	this.holidayDayStyle = "cal_holiday";
	this.eventDayStyle = "cal_event_or";
	this.todayDayStyle = "cal_today";
	// Safilo add:class for other months' days
	this.otherMonthStyle = 'cal_faded';
	
	// specifies the labels for this calendar
	this.dayLabels = [ "Su","Mo","Tu","We","Th","Fr","Sa" ];
	this.monthLabels = [ "January", "February", "March", "April", "May", "June", "July", "August",
						 "September", "October", "November", "December" ];
	
	// Specifies the dates of any event. The events are to be defined as arrays,
	// with element 0 being the date and element 1 being an id.
	this.eventDates = [];
	
	// Attach event handlers to any fallback fields.
	if (!this.viewOnly) {
	
		//setFieldValue(this.attachedId, this.calendarDate);
		
		if ((this.fallback = this.fallback_both) || (this.fallback = this.fallback_single)) {
			try{
			eval("document.getElementById(\"" + this.attachedId + "\").onchange = function () {updateFromSingle("+this.name+", this);}");
			} catch(e){}
		}

		if ((this.fallback = this.fallback_both) || (this.fallback = this.fallback_multi)) {
			try{
			eval("document.getElementById(\"" + this.attachedId + "_day\").onchange = function () {updateFromMultiDay("+this.name+", this);}");
			eval("document.getElementById(\"" + this.attachedId + "_month\").onchange = function () {updateFromMultiMonth("+this.name+", this);}");
			eval("document.getElementById(\"" + this.attachedId + "_year\").onchange = function () {updateFromMultiYear("+this.name+", this);}");
			} catch(e){}
		}
	}

	selectEvent = new Function();
}

function setIt(cal){
	cal.dayLabels = [ "Do", "Lu", "Ma", "Me", "Gi", "Ve", "Sa" ];
	cal.monthLabels = [ "Gennaio", "Febbraio", "Marzo", "Aprile", "Maggio", "Giugno", "Luglio", "Agosto",
	"Settembre", "Ottobre", "Novembre", "Dicembre" ];
}
/*
function setEn(cal){
	cal.dayLabels = [ "Su","Mo","Tu","We","Th","Fr","Sa" ];
	cal.monthLabels = [ 'January','February','March','April','May','June',
	'July','August','September','October','November','December' ];
}
*/

function updateFromSingle (sender, helper) {
	newDate = new Date (helper.value);
	newDate.setUTCDate(newDate.getUTCDate()+1);
	sender.calendarDate = newDate;

	renderCalendar (sender);
	//setFieldValue(sender.attachedId, sender.calendarDate);
}

function updateFromMultiDay (sender, helper) {

	if (isNaN(helper.value)) {
		helper.value = sender.calendarDate.getUTCDate();
		return false;
	}

	sender.calendarDate.setUTCDate(helper.value);
	renderCalendar (sender);
	//setFieldValue(sender.attachedId, sender.calendarDate);
	return true;
}

function updateFromMultiMonth (sender, helper) {

	if (isNaN(helper.value)) {
		helper.value = sender.calendarDate.getUTCMonths() -1;
		return false;
	}
	
	sender.calendarDate.setUTCMonth(helper.value-1);
	renderCalendar (sender);
	setFieldValue(sender.attachedId, sender.calendarDate);
	return true;
}

function updateFromMultiYear (sender, helper) {

	if (isNaN(helper.value)) {
		helper.value = sender.calendarDate.getUTCFullYear();
		return false;
	}
	
	sender.calendarDate.setUTCFullYear(helper.value);
	renderCalendar (sender);
	//setFieldValue(sender.attachedId, sender.calendarDate);

	return true;
}

function getFirstCalendarDate (calendar)
{
	return new Date (
		calendar.calendarDate.getUTCFullYear() ,
		calendar.calendarDate.getUTCMonth() ,
		1
		);
}

function renderCalendar (calendar)
{
	calHtml1 =  ("<table id=\"cal_" + calendar.attachedId + "\" class=\"" +
				 calendar.calendarStyle +"\">") +
 				((calendar.scrolling)?buildHeader(calendar):buildStaticHeader(calendar)) +
				buildCalendarTable (calendar) +
				("</table>");

	$("#cal_" + calendar.attachedId + "_display").html(calHtml1);
}

function scrollMonthBack (calendar)
{
	calendar.calendarDate.setUTCMonth(calendar.calendarDate.getUTCMonth() - 1);
	//setFieldValue(calendar.attachedId, calendar.calendarDate);
	renderCalendar (calendar);
}

function selectDate (calendar, day)
{
	if (!calendar.viewOnly) {
		//calendar.calendarDate.setUTCDate(day);
		//setFieldValue(calendar.attachedId, calendar.calendarDate);
		renderCalendar (calendar);
	}
}

function scrollMonthForward (calendar)
{
	calendar.calendarDate.setUTCMonth(calendar.calendarDate.getUTCMonth() + 1);
	//setFieldValue(calendar.attachedId, calendar.calendarDate);
	renderCalendar (calendar);
}

function csetMonth(mnum, calendar)
{
	calendar.calendarDate.setUTCMonth(mnum);
	//setFieldValue(calendar.attachedId, calendar.calendarDate);
	renderCalendar (calendar);
}

function setFieldValue(fieldId, date) {

	document.getElementById(fieldId).value = date.getUTCFullYear() + "/" + (date.getUTCMonth()+1) + "/" + date.getUTCDate();
	document.getElementById(fieldId + "_year").value = date.getUTCFullYear();
	document.getElementById(fieldId + "_month").selectedIndex = date.getUTCMonth();
	document.getElementById(fieldId + "_day").value = date.getUTCDate();
}

function buildHeader (calendar)
{

	enableLeft = true;
	enableRight = true;
	
	if (calendar.minDate != "--") 
	{
		if (calendar.calendarDate.getUTCFullYear() <= calendar.minDate.getUTCFullYear())
		{
			if (calendar.calendarDate.getUTCMonth() <= calendar.minDate.getUTCMonth())
			{
				enableLeft = false;
			}
		}
	}

	if (calendar.maxDate != "--") 
	{
		if (calendar.calendarDate.getUTCFullYear() >= calendar.maxDate.getUTCFullYear())
		{
			if (calendar.calendarDate.getUTCMonth() >= calendar.maxDate.getUTCMonth())
			{
				enableRight = false;
			}
		}
	}

	calHtml2 = "";
	
	calHtml2 +=  ("<tr class=\"" + calendar.headerStyle +"\">");
	calHtml2 +=  (
		"<td class=\"" +
		calendar.headerCellStyle +
		((enableLeft)?("\" onclick=\"scrollMonthBack(" + calendar.name + ")"):"") +
		"\">" +
		((enableLeft)?calendar.controlLeft:calendar.controlLeftDisabled) +
		"</td>");
	calHtml2 +=  (
		"<td colspan=\"5\" class=\"" +
		calendar.headerCellStyleLabel +
		"\">" +
		calendar.monthLabels[calendar.calendarDate.getUTCMonth()] +
		" " + calendar.calendarDate.getUTCFullYear() +
		"</td>");
	calHtml2 +=  (
		"<td class=\"" +
		calendar.headerCellStyle +
		((enableRight)?("\" onclick=\"scrollMonthForward(" + calendar.name + ")"):"") +
		"\">" +
		((enableRight)?calendar.controlRight:calendar.controlRightDisabled) +
		"</td>");
	
	calHtml2 += ("</tr>");
	
	calHtml2 +=  (
		"<tr class=\"" +
		calendar.headerStyle +
		"\">");

	for (i = 0; i < 7; i++) {
		showDay = i + calendar.firstDayOfWeek;
		if (showDay > 6) showDay = showDay - 7;
		calHtml2 +=  (
			"<td class=\"" +
			calendar.headerCellStyle +
			"\">" +
			calendar.dayLabels[showDay] +
			"</td>");
	}

	calHtml2 += ("</tr>");
	return calHtml2;
}

function buildStaticHeader (calendar)
{
	calHtml2 = "";
	
	calHtml2 += "<tr class=\"" +
		calendar.headerStyle +
		"\">";
	calHtml2 += "<td colspan=\"7\" class=\"" +
		calendar.headerCellStyleLabel +
		"\">" +
		calendar.monthLabels[calendar.calendarDate.getUTCMonth()] +
		", " + calendar.calendarDate.getUTCFullYear() +
		"</td>";	
	calHtml2 += "</tr>";
	
	calHtml2 += "<tr class=\"" +
		calendar.headerStyle +
		"\">";

	for (i = 0; i < 7; i++) {
		showDay = i + calendar.firstDayOfWeek;
		if (showDay > 6) showDay = showDay - 7;
		calHtml2 +=  (
			"<td class=\"" +
			calendar.headerCellStyle +
			"\">" +
			calendar.dayLabels[showDay] +
			"</td>");
	}

	calHtml2 += ("</tr>");
	return calHtml2
}

function RenderDayDisabled (calendar, currentDate)
{
	calHtml += ('<td class="day">');
	calHtml += ("<span class=\"" + calendar.disabledDayStyle + "\">");
	calHtml += (currentDate.getUTCDate());
	calHtml += ("</span>");
	calHtml += ("</td>");
}

function RenderDayEnabled (calendar, currentDate, dayStyle)
{
	currentDayStyle = dayStyle;
	calHtml += '<td class="day">';
	calHtml += "<span class=\"" + dayStyle + "\" onclick=\"selectDate(" + calendar.name + ", " +
				currentDate.getUTCDate() + ")\">";
	calHtml += currentDate.getUTCDate();
	calHtml += "</span>";
	calHtml += "</td>";
}

function RenderDayEvent (calendar, currentDate, dayStyle, eventId, title){
	
	currentDayStyle = dayStyle;
	
	calHtml += "<td class=\"" + dayStyle + "\" onclick=\"selectDate(" + calendar.name + ", " +
				currentDate.getUTCDate() + ");return " + calendar.name + ".selectEvent('" + eventId + "')\"";

	if(title) {
		calHtml += " title=\""+title+"\"";
	}
	calHtml += ">";
	calHtml += (currentDate.getUTCDate());
	calHtml += ("</td>");
}

function buildCalendarTable (calendar)
{
	var today = new Date();
	currentDate = getFirstCalendarDate(calendar);
	odd = 0;
	while (currentDate.getUTCDay() != calendar.firstDayOfWeek)
	{
		currentDate.setUTCDate(currentDate.getUTCDate() - 1);
	}

	calHtml = "";
	do
	{
		odd += 1;

		calHtml +=  (
			"<tr class=\"" + (((odd%2)==0) ? calendar.evenWeekStyle : calendar.oddWeekStyle) + "\">")

		for (i = 0;i < 7;i++)
		{
			var othermonth = currentDate.getUTCMonth()!=calendar.calendarDate.getUTCMonth();
			var rendered = false;
			
			currentDayStyle = calendar.dayStyle;
			currentEventStyle = calendar.commonDayStyle;
			currentDateString = currentDate.getUTCFullYear() + "/" +
								(currentDate.getUTCMonth()+1) + "/" + currentDate.getUTCDate();

//			Disabilito il controllo delle date minima e massima
//			if ( currentDate < calendar.minDate || currentDate > calendar.maxDate ||
//				 currentDate.getUTCMonth() != calendar.calendarDate.getUTCMonth() ){
//				RenderDayDisabled (calendar, currentDate);
//			}
//			else if (currentDate.getUTCDate() == calendar.calendarDate.getUTCDate())
//			{
//				// Giorno = a quello selezionato
//				var daystyle = calendar.commonDayStyle;
//				if ((currentDate.getUTCDay() == 0) || (currentDate.getUTCDay() == 6))
//				{
//					if (calendar.allowWeekends == true)	{
//
//						// Se è lo stesso mese, evidenziamo il giorno - è proprio oggi.
//						//if(currentDate.getUTCMonth()==today.getUTCMonth()){
////							daystyle = calendar.todayDayStyle;
////						}
//						RenderDayEnabled (calendar, currentDate, daystyle );
//					} 
//					else 
//					{
//						RenderDayDisabled (calendar, currentDate);	
//						month = calendar.calendarDate.getUTCMonth();
//						calendar.calendarDate.setUTCDate(calendar.calendarDate.getUTCDate()+1);
//						if (month != calendar.calendarDate.getUTCMonth()){
//							renderCalendar(calendar);
//						}
//						//setFieldValue(calendar.attachedId, calendar.calendarDate);
//					}
//				} else {
//					if (calendar.allowWeekdays == true)
//					{
//						// Se è lo stesso mese, evidenziamo il giorno - è proprio oggi.
//						//if(currentDate.getUTCMonth()==today.getUTCMonth()){
////							daystyle = calendar.todayDayStyle;
////						}
//						RenderDayEnabled (calendar, currentDate, daystyle);
//					} 
//					else 
//					{
//						RenderDayDisabled (calendar, currentDate);	
//						month = calendar.calendarDate.getUTCMonth();
//						calendar.calendarDate.setUTCDate(calendar.calendarDate.getUTCDate()+1);
//						if (month != calendar.calendarDate.getUTCMonth())
//						{
//							renderCalendar(calendar);
//						}
//						//setFieldValue(calendar.attachedId, calendar.calendarDate);
//					}
//				}
//			}
//			else 

			if ((currentDate.getUTCDay() == 0) || (currentDate.getUTCDay() == 6)) {
				if (calendar.allowWeekends){

					if(othermonth){
						RenderDayEnabled (calendar, currentDate, calendar.otherMonthStyle);
					}
					else{
						style = calendar.holidayDayStyle;
						
						for (j=0; j < calendar.eventDates.length; j++)
						{
							if (calendar.eventDates[j][0] == currentDateString) 
							{
								var tit = typeof calendar.eventDates[j][2]=='undefined'?
											'' : calendar.eventDates[j][2];
								style = typeof calendar.eventDates[j][3]=='undefined'?
											calendar.eventDayStyle: calendar.eventDates[j][3];
	
								RenderDayEvent ( calendar, currentDate, style,
												 calendar.eventDates[j][0], tit );
								rendered = true;
							}
						}
						// safilo
						//if(style == calendar.holidayDayStyle) {
						if(!rendered){ RenderDayEnabled (calendar, currentDate, style); }
					}
				} 
				else {
					RenderDayDisabled (calendar, currentDate);	
				}
			} else {
				if (calendar.allowWeekdays){
					
					if(othermonth){
						RenderDayEnabled (calendar, currentDate, calendar.otherMonthStyle);
					}
					else{
						style = calendar.commonDayStyle;
						
						for (j=0; j < calendar.eventDates.length; j++)
						{
							if (calendar.eventDates[j][0] == currentDateString) 
							{
								var tit2 = typeof calendar.eventDates[j][2]=='undefined'?
											'' : calendar.eventDates[j][2];
								style = typeof calendar.eventDates[j][3]=='undefined'?
											calendar.eventDayStyle: calendar.eventDates[j][3];
	
								RenderDayEvent ( calendar, currentDate, style,
												 calendar.eventDates[j][0], tit2 );
								rendered = true;
							}
						}
						
						// safilo
						if(!rendered){ // (style == calendar.commonDayStyle){
							RenderDayEnabled (calendar, currentDate, style);
						}
					}
				} 
				else 
				{
					RenderDayDisabled (calendar, currentDate);
				}
			}

			currentDate.setUTCDate( currentDate.getUTCDate() + 1 );
		}
		
		calHtml += "</tr>";

	} while (currentDate.getUTCMonth() == calendar.calendarDate.getUTCMonth());
	return calHtml;
}