var IMG_PATH = "images/content/events/";



var CAL_ANIM_DELAY = 8000;
var CAL_FADEIN_TIME = 2000;
var CAL_FADEOUT_TIME = 1000;

var EVENT_MONTH = 0;
var EVENT_DAY = 	1;
var EVENT_YEAR = 	2;
var EVENT_IMG = 	3;
var EVENT_LINK = 	4;
var EVENT_TITLE = 5;
var EVENT_BLURB = 6;

var thisDate = 1;							// Tracks current date being written in calendar


var wordMonth = new Array("Jan","Feb","March","April","May","June","July","Aug","Sept","Oct","Nov","Dec");
var wordMonthLong = new Array("January","February","March","April","May","June","July","August","September","October","November","December");

var today = new Date();							// Date object to store the current date
var todaysDay = today.getDay() + 1;					// Stores the current day number 1-7
var todaysDate = today.getDate();					// Stores the current numeric date within the month
var todaysMonth = today.getUTCMonth() + 1;				// Stores the current month 1-12
var todaysYear = today.getFullYear();					// Stores the current year
var monthNum = todaysMonth;						// Tracks the current month being displayed
var yearNum = todaysYear;						// Tracks the current year being displayed
var firstDate = new Date(String(monthNum)+"/1/"+String(yearNum));	// Object Storing the first day of the current month
var firstDay = firstDate.getUTCDay();					// Tracks the day number 1-7 of the first day of the current month
var lastDate = new Date(String(monthNum+1)+"/0/"+String(yearNum));	// Tracks the last date of the current month
var numbDays = 0;
var calendarString = "";
var eastermonth = 0;
var easterday = 0;




var curEventID = 0;
var firstEventID = 0;
var drawNextInterval;

jQuery(document).ready(function()
{
	changedate('return');
});


function changedate(buttonpressed) 
{	
	if (buttonpressed == "prevyr") 
		yearNum--;
	else if (buttonpressed == "nextyr") 
		yearNum++;
	else if (buttonpressed == "prevmo") 
		monthNum--;
	else if (buttonpressed == "nextmo") 
		monthNum++;
	else  if (buttonpressed == "return") 
	{ 
		monthNum = todaysMonth;
		yearNum = todaysYear;
	}

	if (monthNum == 0) 
	{
		monthNum = 12;
		yearNum--;
	}
	else if (monthNum == 13) 
	{
		monthNum = 1;
		yearNum++
	}

	lastDate = new Date(String(monthNum+1)+"/0/"+String(yearNum));
	numbDays = lastDate.getDate();
	firstDate = new Date(String(monthNum)+"/1/"+String(yearNum));
	firstDay = firstDate.getDay() + 1;
	
	createCalendar();
	
	if (buttonpressed == "return")
	{
		showNextEvent(todaysDate,todaysMonth,todaysYear);
		drawNextInterval = setInterval("fadeOutToNext()", CAL_ANIM_DELAY);
	}
		
}




function showNextEvent(day, month, year)
{
	trace('showNextEvent('+day+', '+month+', '+year+')');
	for (day; day <= 31; day++) 
	{
		var dateEventIDs = getDateEventIDs(day,month,year);
		
		if (dateEventIDs.length)
		{
			//showEvent(day, month, year);
			showEventByID(dateEventIDs[0]);
			firstEventID = dateEventIDs[0];			
			return;
		} 		
	}
		
	if(month < 12)
	{
		showNextEvent(1,month+1,year);
	}
	else if(year < yearNum+2)
	{
		showNextEvent(1,1,year+1);
	}
}

// jQuery(#calendarEventDisplay)

function fadeOutToNext()
{	
	 jQuery("#calendarEventDisplay").fadeOut(CAL_FADEOUT_TIME, function () {
			drawNext();
      });
}

function fadeInToNext()
{	
	//jQuery("#calendarEventDisplay").fadeIn(CAL_FADEIN_TIME);
	
	jQuery("#calendarEventDisplay").animate({
      "opacity": "show"
    }, CAL_FADEIN_TIME, "linear");

}

function drawNext()
{
	if(curEventID == events.length -1)
		curEventID = firstEventID-1;		
	showEventByID(curEventID +1);
	fadeInToNext();
	//setTimeout( "fadeInToNext()", 500 );

}


function createCalendar() 
{
	calendarString = '';
	var daycounter = 0;
	calendarString += '<table class="calendarTable" cellpadding="0" cellspacing="0">';
	calendarString += '<tr>';
	calendarString += '<td class="calendarTDHeader" ><a class="PrevYr prev" title="previous year" onClick="changedate(\'prevyr\')">&nbsp;</a></td>';
	calendarString += '<td class="calendarTDHeader" ><a class="PrevMo prev" title="previous month" onClick="changedate(\'prevmo\')">&nbsp;</a></td>';
	calendarString += '<td class="calendarTDTitle" colspan="3">' + wordMonth[monthNum-1] + '&nbsp;&nbsp;' + yearNum + '</td>';
	calendarString += '<td class="calendarTDHeader" ><a class="NextMo next" title="next month" onClick="changedate(\'nextmo\')">&nbsp;</a></td>';
	calendarString += '<td class="calendarTDHeader" ><a class="NextYr next" title="next year" onClick="changedate(\'nextyr\')">&nbsp;</a></td>';
	calendarString += '</tr>';
	calendarString += '<tr>';
	calendarString += '<td class="calendarTDWeek">S</td>';
	calendarString += '<td class="calendarTDWeek">M</td>';
	calendarString += '<td class="calendarTDWeek">T</td>';
	calendarString += '<td class="calendarTDWeek">W</td>';
	calendarString += '<td class="calendarTDWeek">T</td>';
	calendarString += '<td class="calendarTDWeek">F</td>';
	calendarString += '<td class="calendarTDWeek">S</td>';
	calendarString += '</tr>';

	thisDate == 1;

	var todayClass;
	var dayLink;
				
	for (var i = 1; i <= 6; i++) 
	{
		calendarString += '<tr>';
		for (var x = 1; x <= 7; x++) 
		{
			daycounter = (thisDate - firstDay)+1;
			thisDate++;
			
			if ((daycounter > numbDays) || (daycounter < 1)) 
			{
				calendarString += '<td class="calendarTDEmptyDays">&nbsp;</td>';
			} 
			else 
			{
				var isToday = ((todaysDay == x) && (todaysDate == daycounter) && (todaysMonth == monthNum))
				
				var dateEventIDs = getDateEventIDs(daycounter,monthNum,yearNum);
				//trace('dateEventIDs '+dateEventIDs);
				var eventNum = dateEventIDs.length;
				
				if(isToday)
					todayClass = ' class="calendarTDToday" title="today"';
				else
					todayClass = "";
				
				
				var eventList = "";
				
				if(eventNum > 1)
				{
					eventList = '<ul class="eventList">';
					for (var n = 0; n < eventNum; n++) 
					{
						var evtID = dateEventIDs[n];
						//trace("evtID " + evtID);
						var evt = events[evtID];
						//trace("evt " + evt);
						var evtTitle = evt[EVENT_TITLE];
						//trace("evtTitle " + evtTitle);
						eventList += '<li><a href="javascript:clickEventByID('+evtID+')">'+evtTitle+'</a></li>';
					}
					eventList += '</ul>';
				}
				
				if (eventNum > 0)
				{
					dayLink = '<a class="eventLink" href="javascript:clickEventByID(' + dateEventIDs[0]+')">' + daycounter + '</a>'+ eventList;
					
					if(eventNum > 1)
						trace(dayLink);
					
				}
				else if (eventNum == 0)
					dayLink = daycounter;
				
				
				calendarString += '<td'+todayClass+'>' + dayLink + '</td>';
			}
		}
		calendarString += '</tr>';
	}
	
	calendarString += '</table>';

	var object = document.getElementById('calendar');
	object.innerHTML = calendarString;
	thisDate = 1;
	
}



/*
return a subset of the events array of events that occur on that day

function getDateEvents(day,month,year) 
{
	var dayEvents = [];
	//var floater = 0;

	for (var i = 0; i < events.length; i++) 
	{
		if ((events[i][EVENT_DAY] == day) && (events[i][EVENT_MONTH] == month) && (events[i][EVENT_YEAR] == year)) 
		{
			dayEvents.push(events[i]);
		}
	}
	return dayEvents;
}
*/


function getDateEventIDs(day,month,year) 
{
	var dayEventIDs = [];
	for (var i = 0; i < events.length; i++) 
		if ((events[i][EVENT_DAY] == day) && (events[i][EVENT_MONTH] == month) && (events[i][EVENT_YEAR] == year)) 
			dayEventIDs.push(i);
	return dayEventIDs;
}


/*
occurs: on click, on page enter, on animate
get an event for the provided day and display it.

return: null

function showEvent(day,month,year) 
{
	var theevent = "";
	var floater = 0;
	var calendarEventDisplay = document.getElementById('calendarEventDisplay');
	//alert(calendarEventDisplay);
	for (var i = 0; i < events.length; i++) 
	{		
		if ((events[i][EVENT_DAY] == day) && (events[i][EVENT_MONTH] == month) && (events[i][EVENT_YEAR] == year)) 
		{
			theevent = getEventString(events[i]);
			break;
		}
	}	
	calendarEventDisplay.innerHTML = theevent;
}
*/


function clickEventByID(index) 
{
	clearInterval(drawNextInterval);
	showEventByID(index);
	fadeInToNext();
}

function showEventByID(index) 
{
	curEventID = index;
	var calendarEventDisplay = document.getElementById('calendarEventDisplay');
	var theevent = getEventString(events[index]);
	calendarEventDisplay.innerHTML = theevent;
}


/*
convert the event array object into HTML

return: string HTML
*/
function getEventString(PEvent)
{
	trace("getEventString()");
	var theevent = "";
	
	if(PEvent[EVENT_IMG])
		theevent += "<div id='calendarPicDiv'><img id='calendarPic' src='"+IMG_PATH+PEvent[EVENT_IMG]+"' alt='calendar pic' /></div>\n";

	theevent += '<div id="dateText">' + wordMonthLong[PEvent[EVENT_MONTH]-1] +' '+ PEvent[EVENT_DAY] +', '+ PEvent[EVENT_YEAR] + '</div>\n';
	
	if(PEvent[EVENT_TITLE])
		theevent += '<div id="eventTitle">' + PEvent[EVENT_TITLE] + '</div>\n';

	if(PEvent[EVENT_BLURB])
		theevent += '<div id="eventBlurb">' + PEvent[EVENT_BLURB] + '</div>\n';
	
	var lnk;
	//if you're on the event page
	if(window.location.href.indexOf(eventsPage) != -1)
		lnk = "";
	else
		lnk = eventsPage;
		
	trace("lnk = "+lnk);
	
	if(PEvent[EVENT_LINK])
		theevent += '<a href="' + lnk + "#" + PEvent[EVENT_LINK] + '" id="eventReadMore">Read More</a>\n';
		
	return theevent;
}

/*
function easter(year) {
// feed in the year it returns the month and day of Easter using two GLOBAL variables: eastermonth and easterday
var a = year % 19;
var b = Math.floor(year/100);
var c = year % 100;
var d = Math.floor(b/4);
var e = b % 4;
var f = Math.floor((b+8) / 25);
var g = Math.floor((b-f+1) / 3);
var h = (19*a + b - d - g + 15) % 30;
var i = Math.floor(c/4);
var j = c % 4;
var k = (32 + 2*e + 2*i - h - j) % 7;
var m = Math.floor((a + 11*h + 22*k) / 451);
var month = Math.floor((h + k - 7*m + 114) / 31);
var day = ((h + k - 7*m +114) % 31) + 1;
eastermonth = month;
easterday = day;
}


function floatingholiday(targetyr,targetmo,cardinaloccurrence,targetday) {
// Floating holidays/events of the events.js file uses:
//	the Month field for the Month (here it becomes the targetmo field)
//	the Day field as the Cardinal Occurrence  (here it becomes the cardinaloccurrence field)
//		1=1st, 2=2nd, 3=3rd, 4=4th, 5=5th, 6=6th occurrence of the day listed next
//	the Year field as the Day of the week the event/holiday falls on  (here it becomes the targetday field)
//		1=Sunday, 2=Monday, 3=Tuesday, 4=Wednesday, 5=Thurday, 6=Friday, 7=Saturday
//	example: "F",	"1",	"3",	"2", = Floating holiday in January on the 3rd Monday of that month.
//
// In our code below:
// 	targetyr is the active year
// 	targetmo is the active month (1-12)
// 	cardinaloccurrence is the xth occurrence of the targetday (1-6)
// 	targetday is the day of the week the floating holiday is on
//		0=Sun; 1=Mon; 2=Tue; 3=Wed; 4=Thu; 5=Fri; 6=Sat
//		Note: subtract 1 from the targetday field if the info comes from the events.js file
//
// Note:
//	If Memorial Day falls on the 22nd, 23rd, or 24th, then we add 7 to the dayofmonth to the result.
//
// Example: targetyr = 2052; targetmo = 5; cardinaloccurrence = 4; targetday = 1
//	This is the same as saying our floating holiday in the year 2052, is during May, on the 4th Monday
//
var firstdate = new Date(String(targetmo)+"/1/"+String(targetyr));	// Object Storing the first day of the current month.
var firstday = firstdate.getUTCDay();	// The first day (0-6) of the target month.
var dayofmonth = 0;	// zero out our calendar day variable.

	targetday = targetday - 1;

	if (targetday >= firstday) {
		cardinaloccurrence--;	// Subtract 1 from cardinal day.
		dayofmonth = (cardinaloccurrence * 7) + ((targetday - firstday)+1);
	} else {
		dayofmonth = (cardinaloccurrence * 7) + ((targetday - firstday)+1);
	}
return dayofmonth;
}




function getNumEvents(day,month,year,week,dayofweek) 
{
	var numevents = 0;
	//var floater = 0;

	for (var i = 0; i < events.length; i++) 
	{
		
		if (events[i][0] == "W") 
		{
			if ((events[i][2] == dayofweek)) numevents++;
		}
		else if (events[i][0] == "Y") 
		{
			if ((events[i][2] == day) && (events[i][1] == month)) numevents++;
		}
		else if (events[i][0] == "F") 
		{
			if ((events[i][1] == 3) && (events[i][2] == 0) && (events[i][3] == 0) ) {
				easter(year);
				if (easterday == day && eastermonth == month) numevents++;
			} else {
				floater = floatingholiday(year,events[i][1],events[i][2],events[i][3]);
				if ((month == 5) && (events[i][1] == 5) && (events[i][2] == 4) && (events[i][3] == 2)) {
					if ((floater + 7 <= 31) && (day == floater + 7)) {
						numevents++;
					} else if ((floater + 7 > 31) && (day == floater)) numevents++;
				} else if ((events[i][1] == month) && (floater == day)) numevents++;
			}
		}
		else 
		
		
		if ((events[i][2] == day) && (events[i][1] == month) && (events[i][3] == year)) 
		{
			numevents++;
		}
	}
	return numevents;
}
*/