/**
 * @author hugh.maclachlan
 */

function performTSToDate(timestamp) {
	var regex = /^([0-9]{4})([0-1][0-9])([0-3][0-9])([0-2][0-9])([0-5][0-9])([0-5][0-9])?$/;
	var results = regex.exec(timestamp);
	return new Date(results[1], results[2] - 1, results[3], results[4], results[5], results[6]);
}

function getMonthName(monthIndex, isArabic){
	var monthName = '';
	
	if (isArabic) {
		switch (monthIndex) {
			case 0:
				monthName = 'يناير';
				break;
			case 1:
				monthName = 'فبراير';
				break;
			case 2:
				monthName = 'مارس';
				break;
			case 3:
				monthName = 'ابريل';
				break;
			case 4:
				monthName = 'مايو';
				break;
			case 5:
				monthName = 'يونيو';
				break;
			case 6:
				monthName = 'يوليو';
				break;
			case 7:
				monthName = 'اغسطس';
				break;
			case 8:
				monthName = 'سبتمبر';
				break;
			case 9:
				monthName = 'اكتوبر';
				break;
			case 10:
				monthName = 'نوفمبر';
				break;
			case 11:
				monthName = 'ديسمبر';
				break;			
		}
	}
	else {
		switch (monthIndex) {
			case 0:
				monthName = 'January';
				break;
			case 1:
				monthName = 'February';
				break;
			case 2:
				monthName = 'March';
				break;
			case 3:
				monthName = 'April';
				break;
			case 4:
				monthName = 'May';
				break;
			case 5:
				monthName = 'June';
				break;
			case 6:
				monthName = 'July';
				break;
			case 7:
				monthName = 'August';
				break;
			case 8:
				monthName = 'September';
				break;
			case 9:
				monthName = 'October';
				break;
			case 10:
				monthName = 'November';
				break;
			case 11:
				monthName = 'December';
				break;			
		}
	}
	
	return monthName;
}
/*****************************************************/
//Events List proper starts here
function EventList() {
	this.Events = [];
	this.timeZoneOffset = this.getTimeZoneOffset();
}

EventList.prototype.timerInterval = 360000;
EventList.prototype.identifierOn = 'eventOn';
EventList.prototype.identifierOff = 'eventOff';
EventList.prototype.addOnFunction = function(){}; //extra function to be run after events have been processed each interval 

EventList.prototype.getTimeZoneOffset = function() {
	var localDateTime = new Date();
	return timeZoneOffset = localDateTime.getTimezoneOffset() * 60000; 
};

EventList.prototype.addEvent = function(eventId, eventFeedStartTS, eventStartTS, eventEndTS){
	this.Events.push({
		id: eventId,
		feedStartDate: performTSToDate(eventFeedStartTS),
		startDate: performTSToDate(eventStartTS),
		endDate: performTSToDate(eventEndTS)
	});
};

EventList.prototype.startTimer = function() {
	this.updateEventStatus();
};


EventList.prototype.getTranslatedDayString = function(dayString, isArabic){
	if (isArabic) {
		switch(dayString) {
			case 'Today':
				dayString = 'اليوم الحاضر';
				break;
			case 'Tomorrow': 
				dayString = 'الغد';
				break;		
		}
	}
	return dayString;
};

EventList.prototype.friendlyStartTimeDisplay = function(isArabic){
	var timeNow = new Date();
	var dayNow = timeNow.getDOY();
	
	for (var i = 0; i < this.Events.length; i++) {
		currentEvent = this.Events[i];
		
		var localEventDateTime = new Date(currentEvent.startDate.getTime() - this.timeZoneOffset);
                var localEventDay = localEventDateTime.getDOY();
		var timeDiff = localEventDay - dayNow;
		
		if (timeDiff >= 0) {		
			var localEventTime = localEventDateTime.format('HH:MM');
			dateStr = localEventTime + ' - ';
			if (timeDiff == 0) {
				dateStr += this.getTranslatedDayString('Today', isArabic);
			}
			else 
				if (timeDiff == 1) {
					dateStr += this.getTranslatedDayString('Tomorrow', isArabic);
				}
				else {
					dateStr += localEventDateTime.getDate() + ' ' + (getMonthName(localEventDateTime.getMonth(), isArabic));
				}
			
			$('.event' + currentEvent.id + ' .startTime').html(dateStr);
		}
	}
};

EventList.prototype.updateEventStatus = function() {
	var nextEventStart = -1;
	var nextEventEnd = -1;
	
	var timeNow = new Date();
	timeNow = timeNow.getTime() + this.timeZoneOffset;

	var eventsToDelete = [];
	
	for (var i = 0; i < this.Events.length; i++) {
		currentEvent = this.Events[i];
		                
		if ((currentEvent.endDate.getTime() - timeNow) <= 0) {
		    if($('.event' + currentEvent.id).siblings().length == 0){
				$('.event' + currentEvent.id).closest('.eventGroup').remove();
			}else{
				$('.event' + currentEvent.id).remove();
			}
			
			this.Events.splice(i, 1);
			i--;
		} else {
			if ((nextEventEnd < 0) || (currentEvent.endDate.getTime() < nextEventEnd)){
				nextEventEnd = currentEvent.endDate.getTime();
			}
			
			if ((currentEvent.feedStartDate.getTime() - timeNow) <= 0) {
				$('.event' + currentEvent.id + ' .' + this.identifierOn).show();
				$('.event' + currentEvent.id + ' .' + this.identifierOff).hide();
			} else {
				if ((nextEventStart < 0)||(currentEvent.feedStartDate.getTime() < nextEventStart)) {
					nextEventStart = currentEvent.feedStartDate.getTime();
				}
				
				$('.event' + currentEvent.id + ' .' + this.identifierOff).show();
				$('.event' + currentEvent.id + ' .' + this.identifierOn).hide();
			}
		}                                
	}
	
	//run our add on function after we have finished working out which items to display/hide
	this.addOnFunction();
	
	var nextUpdateTime = -1;
	if ((nextEventStart > 0) && (nextEventEnd > 0)) {
		if (nextEventStart < nextEventEnd) {
			nextUpdateTime = nextEventStart;
		} else {
			nextUpdateTime = nextEventEnd;
		}
	} else if (nextEventEnd > 0) {
		nextUpdateTime = nextEventEnd;
	} else {
		nextUpdateTime = nextEventStart;
	}
	
	//make this recursive, in the event that there are still events to start/end
	if (nextUpdateTime > 0) {
		var thisEventList = this;
		timeToNextUpdate = nextUpdateTime - timeNow;
		this.timeOutId = setTimeout(function(){thisEventList.updateEventStatus()}, timeToNextUpdate)
	} 
};
/*****************************************************/