/********************************************************************
 *  Kalendae, a framework agnostic javascript date picker           *
 *	Copyright(c) 2012 Jarvis Badgley ([email protected])         *
 *	https://github.com/ChiperSoft/Kalendae                           *
 *	Version 0.2                                                     *
 ********************************************************************/

(function (undefined) {

var today;

var Kalendae = function (targetElement, options) {
	//if the first argument isn't an element and isn't a string, assume that it is the options object
	if (!(targetElement instanceof Element || typeof targetElement === 'string')) options = targetElement;
	
	var self = this,
		classes = self.classes,
		opts = self.settings = util.merge(self.defaults, {attachTo:targetElement}, options || {}),
		$container = self.container = util.make('div', {'class':classes.container}),
		calendars = self.calendars = [],
		startDay = moment().day(opts.weekStart),
		vsd,
		columnHeaders = [],
		$cal,
		$title,
		$caption,
		$header,
		$days, dayNodes = [],
		$span,
		i = 0,
		j = opts.months;
	
	if (util.isIE8()) util.addClassName($container, 'ie8');
	
	//generate the column headers (Su, Mo, Tu, etc)
	i = 7;
	while (i--) {
		columnHeaders.push( startDay.format('ddd').substr(0,opts.columnHeaderLength) );
		startDay.add('days',1);
	}
	
	//setup publish/subscribe and apply any subscriptions passed in settings
	MinPubSub(self);
	if (typeof opts.subscribe === 'object') {
		for (i in opts.subscribe) if (opts.subscribe.hasOwnProperty(i)) {
			self.subscribe(i, opts.subscribe[i]);
		}
	}
	
	//process default selected dates
	self._sel = [];
	if (!!opts.selected) self.setSelected(opts.selected, false);

	//set the view month
	if (!!opts.viewStartDate) {
		vsd = moment(opts.viewStartDate, opts.format);
	} else if (self._sel.length > 0) {
		vsd = moment(self._sel[0]);
	} else {
		vsd = moment();
	}
	self.viewStartDate = vsd.date(1);
	
	var viewDelta = ({
		'past'			: opts.months-1,
		'today-past'	: opts.months-1,
		'any'			: opts.months>2?Math.floor(opts.months/2):0,
		'today-future'	: 0,
		'future'		: 0
	})[this.settings.direction];


	if (viewDelta && moment().month()==moment(self.viewStartDate).month()){
		self.viewStartDate = moment(self.viewStartDate).subtract({M:viewDelta}).date(1);
	}


	if (typeof opts.blackout === 'function') {
		self.blackout = opts.blackout;
	} else if (!!opts.blackout) {
		var bdates = parseDates(opts.blackout, opts.parseSplitDelimiter);
		self.blackout = function (input) {
			input = moment(input).yearDay();
			if (input < 1 || !self._sel || self._sel.length < 1) return false;
			var i = bdates.length;
			while (i--) if (bdates[i].yearDay() === input) return true;
			return false;			
		}
	} else {
		self.blackout = function () {return false;}
	}
	
	
	self.direction = self.directions[opts.direction] ? self.directions[opts.direction] : self.directions['any'];
	
	
	//for the total months setting, generate N calendar views and add them to the container
	j = Math.max(opts.months,1);
	while (j--) {
		$cal = util.make('div', {'class':classes.calendar}, $container);
		
		$cal.setAttribute('data-cal-index', j);
		if (opts.months > 1) {
			if (j == Math.max(opts.months-1,1)) util.addClassName($cal, classes.monthFirst);
			else if (j === 0) util.addClassName($cal, classes.monthLast);
			else util.addClassName($cal, classes.monthMiddle);
		}
		
		//title bar
		$title = util.make('div', {'class':classes.title}, $cal);
		util.make('a', {'class':classes.previousYear}, $title);	//previous button
		util.make('a', {'class':classes.previousMonth}, $title);	//previous button
		util.make('a', {'class':classes.nextYear}, $title);		//next button
		util.make('a', {'class':classes.nextMonth}, $title);		//next button
		$caption = util.make('span', {'class':classes.caption}, $title);	//title caption
		
		//column headers
		$header = util.make('div', {'class':classes.header}, $cal);
		i = 0;
		do {
			$span = util.make('span', {}, $header);
			$span.innerHTML = columnHeaders[i];
		} while (++i < 7)

		//individual day cells
		$days = util.make('div', {'class':classes.days}, $cal);
		i = 0;
		dayNodes = [];
		while (i++ < 42) {
			dayNodes.push(util.make('span', {}, $days));
		}

		//store each calendar view for easy redrawing
		calendars.push({
			caption:$caption,
			days:dayNodes
		});
		
		if (j) util.make('div', {'class':classes.monthSeparator}, $container);
	}
	
	self.draw();
	
	util.addEvent($container, 'mousedown', function (event, target) {
		var clickedDate;
		if (util.hasClassName(target, classes.nextMonth)) {
		//NEXT MONTH BUTTON
			if (!self.disableNext && self.publish('view-changed', self, ['next-month']) !== false) {
				self.viewStartDate.add('months',1);
				self.draw();
			}
			return false;			
			
		} else if (util.hasClassName(target, classes.previousMonth)) {
		//PREVIOUS MONTH BUTTON
			if (!self.disablePreviousMonth && self.publish('view-changed', self, ['previous-month']) !== false) {
				self.viewStartDate.subtract('months',1);
				self.draw();
			}
			return false;
			
		} else if (util.hasClassName(target, classes.nextYear)) {
		//NEXT MONTH BUTTON
			if (!self.disableNext && self.publish('view-changed', self, ['next-year']) !== false) {
				self.viewStartDate.add('years',1);
				self.draw();
			}
			return false;			

		} else if (util.hasClassName(target, classes.previousYear)) {
		//PREVIOUS MONTH BUTTON
			if (!self.disablePreviousMonth && self.publish('view-changed', self, ['previous-year']) !== false) {
				self.viewStartDate.subtract('years',1);
				self.draw();
			}
			return false;


			
		} else if (util.hasClassName(target.parentNode, classes.days) && util.hasClassName(target, classes.dayActive) && (clickedDate = target.getAttribute('data-date'))) {
		//DAY CLICK
			clickedDate = moment(clickedDate, opts.dayAttributeFormat).hours(12);
			if (self.publish('date-clicked', self, [clickedDate]) !== false) {
			
				switch (opts.mode) {
					case 'multiple':
						if (!self.addSelected(clickedDate)) self.removeSelected(clickedDate);
						break;
					case 'range':
						self.addSelected(clickedDate);
						break;
					case 'single':
						/* falls through */
					default:
						self.addSelected(clickedDate);
						break;
				}

			}
			return false;
			
		}
		return false;
	});
	

	if (!!(opts.attachTo = util.$(opts.attachTo))) {
		opts.attachTo.appendChild($container);
	}
	
};

Kalendae.prototype = {
	defaults : {
		attachTo:				null,			/* the element to attach the root container to. can be string or DOMElement */
		months:					1,				/* total number of months to display side by side */
		weekStart:				0,				/* day to use for the start of the week. 0 is Sunday */
		direction:				'any',			/* past, today-past, any, today-future, future */
		directionScrolling:		true,			/* if a direction other than any is defined, prevent scrolling out of range */
		viewStartDate:			null,			/* date in the month to display.  When multiple months, this is the left most */
		blackout:				null,			/* array of dates, or function to be passed a date */
		selected:				null,			/* dates already selected.  can be string, date, or array of strings or dates. */
		mode:					'single',		/* single, multiple, range */
		format:					null,			/* string used for parsing dates. */
		subscribe:				null,			/* object containing events to subscribe to */

		columnHeaderLength:		2,				/* number of characters to show in the column headers */
		titleFormat:			'MMMM, YYYY',	/* format mask for month titles. See momentjs.com for rules */
		dayNumberFormat:		'D',			/* format mask for individual days */
		dayAttributeFormat:		'YYYY-MM-DD',	/* format mask for the data-date attribute set on every span */
		parseSplitDelimiter:	/,\s*|\s+-\s+/,	/* regex to use for splitting multiple dates from a passed string */
		rangeDelimiter:			' - ',			/* string to use between dates when outputting in range mode */
		multipleDelimiter:		', ',			/* string to use between dates when outputting in multiple mode */
		
		dateClassMap:			{}
	},
	classes : {
		container		:'kalendae',
		calendar		:'k-calendar',
		monthFirst		:'k-first-month',
		monthMiddle		:'k-middle-month',
		monthLast		:'k-last-month',
		title			:'k-title',
		previousMonth	:'k-btn-previous-month',
		nextMonth		:'k-btn-next-month',
		previousYear	:'k-btn-previous-year',
		nextYear		:'k-btn-next-year',
		caption			:'k-caption',
		header			:'k-header',
		days			:'k-days',
		dayOutOfMonth	:'k-out-of-month',
		dayActive		:'k-active',
		daySelected		:'k-selected',
		dayInRange		:'k-range',
		dayToday		:'k-today',
		monthSeparator	:'k-separator',
		disablePreviousMonth	:'k-disable-previous-month-btn',
		disableNextMonth		:'k-disable-next-month-btn',
		disablePreviousYear		:'k-disable-previous-year-btn',
		disableNextYear			:'k-disable-next-year-btn'
	},
	
	disablePreviousMonth: false,
	disableNextMonth: false,
	disablePreviousYear: false,
	disableNextYear: false,
	
	directions: {
		'past'			:function (date) {return moment(date).yearDay() >= today.yearDay();}, 
		'today-past'	:function (date) {return moment(date).yearDay() > today.yearDay();}, 
		'any'			:function (date) {return false;}, 
		'today-future'	:function (date) {return moment(date).yearDay() < today.yearDay();}, 
		'future'		:function (date) {return moment(date).yearDay() <= today.yearDay();}
	},
	
	getSelectedAsDates : function () {
		var out = [];
		var i=0, c = this._sel.length;
		for (;i<c;i++) {
			out.push(this._sel[i].nativeDate());
		}
		return out;
	},
	
	getSelectedAsText : function (format) {
		var out = [];
		var i=0, c = this._sel.length;
		for (;i<c;i++) {
			out.push(this._sel[i].format(format || this.settings.format || 'YYYY-MM-DD'))
		}
		return out;
	},
	
	getSelectedRaw : function () {
		var out = [];
		var i=0, c = this._sel.length;
		for (;i<c;i++) {
			out.push(moment(this._sel[i]))
		}
		return out;
	},
	
	getSelected : function (format) {
		var sel = this.getSelectedAsText(format);
		switch (this.settings.mode) {
			case 'range':
				sel.splice(2); //shouldn't be more than two, but lets just make sure.
				return sel.join(this.settings.rangeDelimiter);

			case 'multiple':
				return sel.join(this.settings.multipleDelimiter);

			case 'single':
				/* falls through */
			default:
				return sel[0];
		}
	},
	
	isSelected : function (input) {
		input = moment(input).yearDay();
		if (input < 1 || !this._sel || this._sel.length < 1) return false;

		switch (this.settings.mode) {
			case 'range':
				var a = this._sel[0] ? this._sel[0].yearDay() : 0,
					b = this._sel[1] ? this._sel[1].yearDay() : 0;

				if (a === input || b === input) return 1;
				if (!a || !b) return 0;

				if ((input > a && input < b) || (a<b && input < a && input > b))  return -1;
				return false;

			case 'multiple':
				var i = this._sel.length;
				while (i--) {
					if (this._sel[i].yearDay() === input) {
						return true;
					}
				}
				return false;


			case 'single':
				/* falls through */
			default:
				return (this._sel[0] && (this._sel[0].yearDay() === input));
		}

		return false;
	},
	
	setSelected : function (input, draw) {
		this._sel = parseDates(input, this.settings.parseSplitDelimiter, this.settings.format);
		this._sel.sort(function (a,b) {return a.yearDay() - b.yearDay();});

		if (draw !== false) this.draw();
	},
	
	addSelected : function (date, draw) {
		date = moment(date).hours(12);
		switch (this.settings.mode) {
			case 'multiple':
				if (!this.isSelected(date)) this._sel.push(date);
				else return false;
				break;
			case 'range':

				if (this._sel.length !== 1) this._sel = [date];
				else {
					if (date.yearDay() > this._sel[0].yearDay()) this._sel[1] = date;
					else this._sel = [date, this._sel[0]];
				}
				break;
			case 'single':
				/* falls through */
			default:
				this._sel = [date];
				break;
		}
		this._sel.sort(function (a,b) {return a.yearDay() - b.yearDay();});
		this.publish('change', this);
		if (draw !== false) this.draw();
		return true;
	},
	
	removeSelected : function (date, draw) {
		date = moment(date).yearDay();
		var i = this._sel.length;
		while (i--) {
			if (this._sel[i].yearDay() === date) {
				this._sel.splice(i,1);
				this.publish('change', this);
				if (draw !== false) this.draw();
				return true;
			}
		}
		return false;
	},
	
	draw : function draw() {
		// return;
		var month = moment(this.viewStartDate).hours(12), //force middle of the day to avoid any weird date shifts
			day,
			classes = this.classes,
			cal,
			$span,
			klass,
			i=0, c,
			j=0, k,
			s,
			dateString,
			opts = this.settings;

		c = this.calendars.length;

		do {
			day = moment(month).date(1);
			day.day( day.day() < this.settings.weekStart ? this.settings.weekStart-7 : this.settings.weekStart); 
			//if the first day of the month is less than our week start, back up a week

			cal = this.calendars[i];
			cal.caption.innerHTML = month.format(this.settings.titleFormat);
			j = 0;
			do {
				$span = cal.days[j];

				klass = [];

				s = this.isSelected(day);

				if (s) klass.push(({'-1':classes.dayInRange,'1':classes.daySelected, 'true':classes.daySelected})[s]);

				if (day.month() != month.month()) klass.push(classes.dayOutOfMonth);
				else if (!(this.blackout(day) || this.direction(day)) || s>0) klass.push(classes.dayActive);

				if (day.yearDay() === today.yearDay()) klass.push(classes.dayToday);

				dateString = day.format(this.settings.dayAttributeFormat);
				if (opts.dateClassMap[dateString]) klass.push(opts.dateClassMap[dateString]);

				$span.innerHTML = day.format(opts.dayNumberFormat);
				$span.className = klass.join(' ');
				$span.setAttribute('data-date', dateString);
				

				day.add('days',1);
			} while (++j < 42);
			month.add('months',1);
		} while (++i < c);
		
		if (opts.directionScrolling) {
			var diff = -(moment().diff(month, 'months'));		
			if (opts.direction==='today-past' || opts.direction==='past') {

				if (diff <= 0) {
					this.disableNextMonth = false;
					util.removeClassName(this.container, classes.disableNextMonth);
				} else {
					this.disableNextMonth = true;
					util.addClassName(this.container, classes.disableNextMonth);
				}

			} else if (opts.direction==='today-future' || opts.direction==='future') {

				if (diff > opts.months) {
					this.disablePreviousMonth = false;
					util.removeClassName(this.container, classes.disablePreviousMonth);
				} else {
					this.disablePreviousMonth = true;
					util.addClassName(this.container, classes.disablePreviousMonth);
				}

			}
			
				
			if (opts.direction==='today-past' || opts.direction==='past') {
				if (month.add({Y:1}).diff(moment(), 'years') < 0) {
					this.disableNextYear = false;
					util.removeClassName(this.container, classes.disableNextYear);
				} else {
					this.disableNextYear = true;
					util.addClassName(this.container, classes.disableNextYear);
				}

			} else if (opts.direction==='today-future' || opts.direction==='future') {
				if (month.subtract({Y:1}).diff(moment(), 'years') > 0) {
					this.disablePreviousYear = false;
					util.removeClassName(this.container, classes.disablePreviousYear);
				} else {
					this.disablePreviousYear = true;
					util.addClassName(this.container, classes.disablePreviousYear);
				}

			}
			
		}
	}
}

var parseDates = function (input, delimiter, format) {
	var output = [];
	
	if (typeof input === 'string') {
		input = input.split(delimiter);		
	} else if (!util.isArray(input)) {
		input = [input];
	}
	
	var c = input.length;
	i = 0;
	do {
		if (input[i]) output.push( moment(input[i], format).hours(12) );
	} while (++i < c);
	
	return output;
}



window.Kalendae = Kalendae;

var util = Kalendae.util = {
	
	isIE8: function() {
	    return !!( (/msie 8./i).test(navigator.appVersion) && !(/opera/i).test(navigator.userAgent) && window.ActiveXObject && XDomainRequest && !window.msPerformance );
	},
	
// ELEMENT FUNCTIONS

	$: function (elem) {
		return (typeof elem == 'string') ? document.getElementById(elem) : elem;
	},
	
	$$: function (selector) {
		return document.querySelectorAll(selector);
	},
	
	make: function (tagName, attributes, attach) {
		var k, e = document.createElement(tagName);
		if (!!attributes) for (k in attributes) if (attributes.hasOwnProperty(k)) e.setAttribute(k, attributes[k]);
		if (!!attach) attach.appendChild(e);
		return e;
	},

	// Returns true if the DOM element is visible, false if it's hidden.
	// Checks if display is anything other than none.
	isVisible: function (elem) {
		// shamelessly copied from jQuery
		return elem.offsetWidth > 0 || elem.offsetHeight > 0;
	},
	
	getStyle: function (elem, styleProp) {
		var y;
		if (elem.currentStyle) {
			y = elem.currentStyle[styleProp];
		} else if (window.getComputedStyle) {
			y = window.getComputedStyle(elem, null)[styleProp];
		}
		return y;
	},
	
	domReady:function (f){/in/.test(document.readyState) ? setTimeout(function() {util.domReady(f);},9) : f()},

	// Adds a listener callback to a DOM element which is fired on a specified
	// event.  Callback is sent the event object and the element that triggered the event
	addEvent: function (elem, eventName, callback) {
		var listener = function (event) {
			event = event || window.event;
			var target = event.target || event.srcElement;
			var block = callback.apply(elem, [event, target]);
			if (block === false) {
				if (!!event.preventDefault) event.preventDefault();
				else {
					event.returnValue = false;
					event.cancelBubble = true;
				}
			}
			return block;
		};
		if (elem.attachEvent) { // IE only.  The "on" is mandatory.
			elem.attachEvent("on" + eventName, listener);
		} else { // Other browsers.
			elem.addEventListener(eventName, listener, false);
		}
		return listener;
	},

	// Removes a listener callback from a DOM element which is fired on a specified
	// event.
	removeEvent: function (elem, event, listener) {
		if (elem.detachEvent) {	// IE only.  The "on" is mandatory.
			elem.detachEvent("on" + event, listener);
		} else { // Other browsers.
			elem.removeEventListener(event, listener, false);
		}
	},
	
	hasClassName: function(elem, className) { //copied and modified from Prototype.js
		if (!(elem = util.$(elem))) return false;
		var eClassName = elem.className;
		return (eClassName.length > 0 && (eClassName == className || new RegExp("(^|\\s)" + className + "(\\s|$)").test(eClassName)));
	},

	addClassName: function(elem, className) { //copied and modified from Prototype.js
		if (!(elem = util.$(elem))) return;
		if (!util.hasClassName(elem, className)) elem.className += (elem.className ? ' ' : '') + className;
	},

	removeClassName: function(elem, className) { //copied and modified from Prototype.js
		if (!(elem = util.$(elem))) return;
		elem.className = util.trimString(elem.className.replace(new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' '));
	},

	isFixed: function (elem) {
		do {
			if (util.getStyle(elem, 'position') === 'fixed') return true;
		} while ((elem = elem.offsetParent));
		return false;
	},
	
	getPosition: function (elem, isInner) {
		var x = elem.offsetLeft,
			y = elem.offsetTop,
			r = {};
			
		if (!isInner) {
			while ((elem = elem.offsetParent)) {
				x += elem.offsetLeft;
				y += elem.offsetTop;
			}
		}
		
		r[0] = r.left = x;
		r[1] = r.top = y;
		return r;
	},

	getHeight: function (elem) {
		return elem.offsetHeight || elem.scrollHeight;
	},

	getWidth: function (elem) {
		return elem.offsetWidth || elem.scrollWidth;
	},
	
	
// TEXT FUNCTIONS	
	
	trimString: function (input) {
		return input.replace(/^\s+/, '').replace(/\s+$/, '');
	},
	
	
// OBJECT FUNCTIONS

	merge: function () {
		/* Combines multiple objects into one.
		 * Syntax: util.extend([true], object1, object2, ... objectN)
		 * If first argument is true, function will merge recursively.
		 */
		
		var deep = (arguments[0]===true),
			d = {},
			i = deep?1:0;

		var _c = function (a, b) {
			if (typeof b !== 'object') return;
			for (var k in b) if (b.hasOwnProperty(k)) {
				//if property is an object or array, merge the contents instead of overwriting, if extend() was called as such
				if (deep && typeof a[k] === 'object' && typeof b[k] === 'object') _update(a[k], b[k]);
				else a[k] = b[k];
			}
			return a;
		}

		for (; i < arguments.length; i++) {
			_c(d, arguments[i]);
		}
		return d;
	},
	
	isArray: function (array) {
		return !(
			!array || 
			(!array.length || array.length === 0) || 
			typeof array !== 'object' || 
			!array.constructor || 
			array.nodeType || 
			array.item 
		);
	}
};


//auto-initializaiton code
Kalendae.util.domReady(function () {
	var els = util.$$('.auto-kal'),
		i = els.length,
		e;

	while (i--) {
		e = els[i];
		if (e.tagName === 'INPUT') {
			//if element is an input, bind a popup calendar to the input.
			new Kalendae.Input(e);
		} else {
			//otherwise, insert a flat calendar into the element.
			new Kalendae({attachTo:e});
		}
		
	}
});

Kalendae.Input = function (targetElement, options) {
	var $input = this.input = util.$(targetElement),
		overwriteInput;

	if (!$input || $input.tagName !== 'INPUT') throw "First argument for Kalendae.Input must be an <input> element or a valid element id.";
	
	var self = this,
		classes = self.classes
		opts = self.settings = util.merge(self.defaults, options);
	
	//force attachment to the body
	opts.attachTo = window.document.body;

	//if no override provided, use the input's contents
	if (!opts.selected) opts.selected = $input.value;
	else overwriteInput = true;
	
	//call our parent constructor
	Kalendae.call(self, opts);
	
	//create the close button
	if (opts.closeButton) {
		var $closeButton = util.make('a', {'class':classes.closeButton}, self.container)
		util.addEvent($closeButton, 'click', function () {
			$input.blur();
		});
	}
	
	if (overwriteInput) $input.value = self.getSelected();
	
	var $container = self.container,
		noclose = false;
	
	$container.style.display = 'none';
	util.addClassName($container, classes.positioned);
	
	util.addEvent($container, 'mousedown', function (event, target) {
		noclose = true; //IE8 doesn't obey event blocking when it comes to focusing, so we have to do this shit.
	});
	util.addEvent(window.document, 'mousedown', function (event, target) {
		noclose = false;
	});

	util.addEvent($input, 'focus', function () {
		self.setSelected(this.value);
		self.show();
	});
	
	util.addEvent($input, 'blur', function () {
		if (noclose) {
			noclose = false;
			$input.focus();
		}
		else self.hide();
	});
	util.addEvent($input, 'keyup', function (event) {
		self.setSelected(this.value);
	});
	
	self.subscribe('change', function () {
		$input.value = self.getSelected();
	});
	
};

Kalendae.Input.prototype = util.merge(Kalendae.prototype, {
	defaults : util.merge(Kalendae.prototype.defaults, {
		format: 'MM/DD/YYYY',
		side: 'bottom',
		closeButton: true,
		offsetLeft: 0,
		offsetTop: 0
	}),
	classes : util.merge(Kalendae.prototype.classes, {
		positioned : 'k-floating',
		closeButton: 'k-btn-close'
	}),
	
	show : function () {
		var $container = this.container,
			style = $container.style,
			$input = this.input,
			pos = util.getPosition($input);
		
		style.display = '';
		switch (opts.side) {
			case 'left':
				style.left = (pos.left - util.getWidth($container) + this.settings.offsetLeft) + 'px';
				style.top  = (pos.top + this.settings.offsetTop) + 'px';
				break;
			case 'right':
				style.left = (pos.left + util.getWidth($input)) + 'px';
				style.top  = (pos.top + this.settings.offsetTop) + 'px';
				break;
			case 'top':
				style.left = (pos.left + this.settings.offsetLeft) + 'px';
				style.top  = (pos.top - util.getHeight($container) + this.settings.offsetTop) + 'px';
				break;
			case 'bottom':
				/* falls through */
			default:
				style.left = (pos.left + this.settings.offsetLeft) + 'px';
				style.top  = (pos.top + util.getHeight($input) + this.settings.offsetTop) + 'px';
				break;
		}
		
		style.position = util.isFixed($input) ? 'fixed' : 'absolute';
				
	},
	
	hide : function () {
		this.container.style.display = 'none';
	}
	
});


/*!
* MinPubSub, modified for use on Kalendae
* Copyright(c) 2011 Daniel Lamb <daniellmb.com>
* https://github.com/daniellmb/MinPubSub
* MIT Licensed
*/

var MinPubSub = function(d){

	if (!d) d = this;

	// the topic/subscription hash
	var cache = d.c_ || {}; //check for "c_" cache for unit testing
	
	d.publish = function(/* String */ topic, /* Object */ target, /* Array? */ args){
		// summary: 
		//		Publish some data on a named topic.
		// topic: String
		//		The channel to publish on
		// args: Array?
		//		The data to publish. Each array item is converted into an ordered
		//		arguments on the subscribed functions. 
		//
		// example:
		//		Publish stuff on '/some/topic'. Anything subscribed will be called
		//		with a function signature like: function(a,b,c){ ... }
		//
		//		publish("/some/topic", ["a","b","c"]);
		
		var subs = cache[topic],
			len = subs ? subs.length : 0,
			r;

		//can change loop or reverse array if the order matters
		while(len--){
			r = subs[len].apply(target, args || []);
			if (typeof r === 'boolean') return r;
		}
	};

	d.subscribe = function(/* String */ topic, /* Function */ callback, /* Boolean */ topPriority){
		// summary:
		//		Register a callback on a named topic.
		// topic: String
		//		The channel to subscribe to
		// callback: Function
		//		The handler event. Anytime something is publish'ed on a 
		//		subscribed channel, the callback will be called with the
		//		published array as ordered arguments.
		//
		// returns: Array
		//		A handle which can be used to unsubscribe this particular subscription.
		//	
		// example:
		//		subscribe("/some/topic", function(a, b, c){ /* handle data */ });

		if(!cache[topic]){
			cache[topic] = [];
		}
		if (topPriority)
			cache[topic].push(callback);
		else
			cache[topic].unshift(callback);
		return [topic, callback]; // Array
	};

	d.unsubscribe = function(/* Array */ handle){
		// summary:
		//		Disconnect a subscribed function for a topic.
		// handle: Array
		//		The return value from a subscribe call.
		// example:
		//		var handle = subscribe("/some/topic", function(){});
		//		unsubscribe(handle);
		
		var subs = cache[handle[0]],
			callback = handle[1],
			len = subs ? subs.length : 0;
		
		while(len--){
			if(subs[len] === callback){
				subs.splice(len, 1);
			}
		}
	};

};// Moment.js
// Altered slightly for use in Kalendae.js
//
// (c) 2011 Tim Wood
// Moment.js is freely distributable under the terms of the MIT license.
//
// Version 1.3.0

var moment = Kalendae.moment = (function (Date, undefined) {

    var moment,
        round = Math.round,
        languages = {},
        hasModule = (typeof module !== 'undefined'),
        paramsToParse = 'months|monthsShort|monthsParse|weekdays|weekdaysShort|longDateFormat|calendar|relativeTime|ordinal|meridiem'.split('|'),
        i,
        charactersToReplace = /(\[[^\[]*\])|(\\)?(Mo|MM?M?M?|Do|DDDo|DD?D?D?|dddd?|do?|w[o|w]?|YYYY|YY|a|A|hh?|HH?|mm?|ss?|zz?|ZZ?|LT|LL?L?L?)/g,
        nonuppercaseLetters = /[^A-Z]/g,
        timezoneRegex = /\([A-Za-z ]+\)|:[0-9]{2} [A-Z]{3} /g,
        tokenCharacters = /(\\)?(MM?M?M?|dd?d?d|DD?D?D?|YYYY|YY|a|A|hh?|HH?|mm?|ss?|ZZ?|T)/g,
        inputCharacters = /(\\)?([0-9]+|([a-zA-Z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+|([\+\-]\d\d:?\d\d))/gi,
        timezoneParseRegex = /([\+\-]|\d\d)/gi,
        VERSION = "1.3.0",
        shortcuts = 'Month|Date|Hours|Minutes|Seconds|Milliseconds'.split('|');

    // Moment prototype object
    function Moment(date) {
        this._d = date;
    }

    // left zero fill a number
    // see http://jsperf.com/left-zero-filling for performance comparison
    function leftZeroFill(number, targetLength) {
        var output = number + '';
        while (output.length < targetLength) {
            output = '0' + output;
        }
        return output;
    }

    // helper function for _.addTime and _.subtractTime
    function dateAddRemove(date, _input, adding, val) {
        var isString = (typeof _input === 'string'),
            input = isString ? {} : _input,
            ms, d, M, currentDate;
        if (isString && val) {
            input[_input] = val;
        }
        ms = (input.ms || input.milliseconds || 0) +
            (input.s || input.seconds || 0) * 1e3 + // 1000
            (input.m || input.minutes || 0) * 6e4 + // 1000 * 60
            (input.h || input.hours || 0) * 36e5; // 1000 * 60 * 60
        d = (input.d || input.days || 0) +
            (input.w || input.weeks || 0) * 7;
        M = (input.M || input.months || 0) +
            (input.y || input.years || 0) * 12;
        if (ms) {
            date.setTime(+date + ms * adding);
        }
        if (d) {
            date.setDate(date.getDate() + d * adding);
        }
        if (M) {
            currentDate = date.getDate();
            date.setDate(1);
            date.setMonth(date.getMonth() + M * adding);
            date.setDate(Math.min(new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate(), currentDate));
        }
        return date;
    }

    // check if is an array
    function isArray(input) {
        return Object.prototype.toString.call(input) === '[object Array]';
    }

    // convert an array to a date.
    // the array should mirror the parameters below
    // note: all values past the year are optional and will default to the lowest possible value.
    // [year, month, day , hour, minute, second, millisecond]
    function dateFromArray(input) {
        return new Date(input[0], input[1] || 0, input[2] || 1, input[3] || 0, input[4] || 0, input[5] || 0, input[6] || 0);
    }

    // format date using native date object
    function formatDate(date, inputString) {
        var m = new Moment(date),
            currentMonth = m.month(),
            currentDate = m.date(),
            currentYear = m.year(),
            currentDay = m.day(),
            currentHours = m.hours(),
            currentMinutes = m.minutes(),
            currentSeconds = m.seconds(),
            currentZone = m.zone(),
            ordinal = moment.ordinal,
            meridiem = moment.meridiem;
        // check if the character is a format
        // return formatted string or non string.
        //
        // uses switch/case instead of an object of named functions (like http://phpjs.org/functions/date:380)
        // for minification and performance
        // see http://jsperf.com/object-of-functions-vs-switch for performance comparison
        function replaceFunction(input) {
            // create a couple variables to be used later inside one of the cases.
            var a, b;
            switch (input) {
                // MONTH
            case 'M' :
                return currentMonth + 1;
            case 'Mo' :
                return (currentMonth + 1) + ordinal(currentMonth + 1);
            case 'MM' :
                return leftZeroFill(currentMonth + 1, 2);
            case 'MMM' :
                return moment.monthsShort[currentMonth];
            case 'MMMM' :
                return moment.months[currentMonth];
            // DAY OF MONTH
            case 'D' :
                return currentDate;
            case 'Do' :
                return currentDate + ordinal(currentDate);
            case 'DD' :
                return leftZeroFill(currentDate, 2);
            // DAY OF YEAR
            case 'DDD' :
                a = new Date(currentYear, currentMonth, currentDate);
                b = new Date(currentYear, 0, 1);
                return ~~ (((a - b) / 864e5) + 1.5);
            case 'DDDo' :
                a = replaceFunction('DDD');
                return a + ordinal(a);
            case 'DDDD' :
                return leftZeroFill(replaceFunction('DDD'), 3);
            // WEEKDAY
            case 'd' :
                return currentDay;
            case 'do' :
                return currentDay + ordinal(currentDay);
            case 'ddd' :
                return moment.weekdaysShort[currentDay];
            case 'dddd' :
                return moment.weekdays[currentDay];
            // WEEK OF YEAR
            case 'w' :
                a = new Date(currentYear, currentMonth, currentDate - currentDay + 5);
                b = new Date(a.getFullYear(), 0, 4);
                return ~~ ((a - b) / 864e5 / 7 + 1.5);
            case 'wo' :
                a = replaceFunction('w');
                return a + ordinal(a);
            case 'ww' :
                return leftZeroFill(replaceFunction('w'), 2);
            // YEAR
            case 'YY' :
                return leftZeroFill(currentYear % 100, 2);
            case 'YYYY' :
                return currentYear;
            // AM / PM
            case 'a' :
                return currentHours > 11 ? meridiem.pm : meridiem.am;
            case 'A' :
                return currentHours > 11 ? meridiem.PM : meridiem.AM;
            // 24 HOUR
            case 'H' :
                return currentHours;
            case 'HH' :
                return leftZeroFill(currentHours, 2);
            // 12 HOUR
            case 'h' :
                return currentHours % 12 || 12;
            case 'hh' :
                return leftZeroFill(currentHours % 12 || 12, 2);
            // MINUTE
            case 'm' :
                return currentMinutes;
            case 'mm' :
                return leftZeroFill(currentMinutes, 2);
            // SECOND
            case 's' :
                return currentSeconds;
            case 'ss' :
                return leftZeroFill(currentSeconds, 2);
            // TIMEZONE
            case 'zz' :
                // depreciating 'zz' fall through to 'z'
            case 'z' :
                return (date.toString().match(timezoneRegex) || [''])[0].replace(nonuppercaseLetters, '');
            case 'Z' :
                return (currentZone > 0 ? '+' : '-') + leftZeroFill(~~(Math.abs(currentZone) / 60), 2) + ':' + leftZeroFill(~~(Math.abs(currentZone) % 60), 2);
            case 'ZZ' :
                return (currentZone > 0 ? '+' : '-') + leftZeroFill(~~(10 * Math.abs(currentZone) / 6), 4);
            // LONG DATES
            case 'L' :
            case 'LL' :
            case 'LLL' :
            case 'LLLL' :
            case 'LT' :
                return formatDate(date, moment.longDateFormat[input]);
            // DEFAULT
            default :
                return input.replace(/(^\[)|(\\)|\]$/g, "");
            }
        }
        return inputString.replace(charactersToReplace, replaceFunction);
    }

    // date from string and format string
    function makeDateFromStringAndFormat(string, format) {
        var inArray = [0, 0, 1, 0, 0, 0, 0],
            timezoneHours = 0,
            timezoneMinutes = 0,
            isUsingUTC = false,
            inputParts = string.match(inputCharacters),
            formatParts = format.match(tokenCharacters),
            i,
            isPm;

        // function to convert string input to date
        function addTime(format, input) {
            var a;
            switch (format) {
            // MONTH
            case 'M' :
                // fall through to MM
            case 'MM' :
                inArray[1] = ~~input - 1;
                break;
            case 'MMM' :
                // fall through to MMMM
            case 'MMMM' :
                for (a = 0; a < 12; a++) {
                    if (moment.monthsParse[a].test(input)) {
                        inArray[1] = a;
                        break;
                    }
                }
                break;
            // DAY OF MONTH
            case 'D' :
                // fall through to DDDD
            case 'DD' :
                // fall through to DDDD
            case 'DDD' :
                // fall through to DDDD
            case 'DDDD' :
                inArray[2] = ~~input;
                break;
            // YEAR
            case 'YY' :
                input = ~~input;
                inArray[0] = input + (input > 70 ? 1900 : 2000);
                break;
            case 'YYYY' :
                inArray[0] = ~~Math.abs(input);
                break;
            // AM / PM
            case 'a' :
                // fall through to A
            case 'A' :
                isPm = (input.toLowerCase() === 'pm');
                break;
            // 24 HOUR
            case 'H' :
                // fall through to hh
            case 'HH' :
                // fall through to hh
            case 'h' :
                // fall through to hh
            case 'hh' :
                inArray[3] = ~~input;
                break;
            // MINUTE
            case 'm' :
                // fall through to mm
            case 'mm' :
                inArray[4] = ~~input;
                break;
            // SECOND
            case 's' :
                // fall through to ss
            case 'ss' :
                inArray[5] = ~~input;
                break;
            // TIMEZONE
            case 'Z' :
                // fall through to ZZ
            case 'ZZ' :
                isUsingUTC = true;
                a = input.match(timezoneParseRegex);
                if (a[1]) {
                    timezoneHours = ~~a[1];
                }
                if (a[2]) {
                    timezoneMinutes = ~~a[2];
                }
                // reverse offsets
                if (a[0] === '-') {
                    timezoneHours = -timezoneHours;
                    timezoneMinutes = -timezoneMinutes;
                }
                break;
            }
        }
        for (i = 0; i < formatParts.length; i++) {
            addTime(formatParts[i], inputParts[i]);
        }
        // handle am pm
        if (isPm && inArray[3] < 12) {
            inArray[3] += 12;
        }
        // if is 12 am, change hours to 0
        if (isPm === false && inArray[3] === 12) {
            inArray[3] = 0;
        }
        // handle timezone
        inArray[3] += timezoneHours;
        inArray[4] += timezoneMinutes;
        // return
        return isUsingUTC ? new Date(Date.UTC.apply({}, inArray)) : dateFromArray(inArray);
    }

    // compare two arrays, return the number of differences
    function compareArrays(array1, array2) {
        var len = Math.min(array1.length, array2.length),
            lengthDiff = Math.abs(array1.length - array2.length),
            diffs = 0,
            i;
        for (i = 0; i < len; i++) {
            if (~~array1[i] !== ~~array2[i]) {
                diffs++;
            }
        }
        return diffs + lengthDiff;
    }

    // date from string and array of format strings
    function makeDateFromStringAndArray(string, formats) {
        var output,
            inputParts = string.match(inputCharacters),
            scores = [],
            scoreToBeat = 99,
            i,
            curDate,
            curScore;
        for (i = 0; i < formats.length; i++) {
            curDate = makeDateFromStringAndFormat(string, formats[i]);
            curScore = compareArrays(inputParts, formatDate(curDate, formats[i]).match(inputCharacters));
            if (curScore < scoreToBeat) {
                scoreToBeat = curScore;
                output = curDate;
            }
        }
        return output;
    }

    moment = function (input, format) {
        if (input === null) {
            return null;
        }
        var date;
        // parse UnderscoreDate object
        if (input && input._d instanceof Date) {
            date = new Date(+input._d);
        // parse string and format
        } else if (format) {
            if (isArray(format)) {
                date = makeDateFromStringAndArray(input, format);
            } else {
                date = makeDateFromStringAndFormat(input, format);
            }
        // parse everything else
        } else {
            date = input === undefined ? new Date() :
                input instanceof Date ? input :
                isArray(input) ? dateFromArray(input) :
                new Date(input);
        }
        return new Moment(date);
    };

    // version number
    moment.version = VERSION;

    // language switching and caching
    moment.lang = function (key, values) {
        var i,
            param,
            req,
            parse = [];
        if (values) {
            for (i = 0; i < 12; i++) {
                parse[i] = new RegExp('^' + values.months[i] + '|^' + values.monthsShort[i].replace('.', ''), 'i');
            }
            values.monthsParse = values.monthsParse || parse;
            languages[key] = values;
        }
        if (languages[key]) {
            for (i = 0; i < paramsToParse.length; i++) {
                param = paramsToParse[i];
                moment[param] = languages[key][param] || moment[param];
            }
        } else {
            if (hasModule) {
                req = require('./lang/' + key);
                moment.lang(key, req);
            }
        }
    };

    // set default language
    moment.lang('en', {
        months : "January_February_March_April_May_June_July_August_September_October_November_December".split("_"),
        monthsShort : "Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec".split("_"),
        weekdays : "Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday".split("_"),
        weekdaysShort : "Sun_Mon_Tue_Wed_Thu_Fri_Sat".split("_"),
        longDateFormat : {
            LT : "h:mm A",
            L : "MM/DD/YYYY",
            LL : "MMMM D YYYY",
            LLL : "MMMM D YYYY LT",
            LLLL : "dddd, MMMM D YYYY LT"
        },
        meridiem : {
            AM : 'AM',
            am : 'am',
            PM : 'PM',
            pm : 'pm'
        },
        calendar : {
            sameDay : '[Today at] LT',
            nextDay : '[Tomorrow at] LT',
            nextWeek : 'dddd [at] LT',
            lastDay : '[Yesterday at] LT',
            lastWeek : '[last] dddd [at] LT',
            sameElse : 'L'
        },
        relativeTime : {
            future : "in %s",
            past : "%s ago",
            s : "a few seconds",
            m : "a minute",
            mm : "%d minutes",
            h : "an hour",
            hh : "%d hours",
            d : "a day",
            dd : "%d days",
            M : "a month",
            MM : "%d months",
            y : "a year",
            yy : "%d years"
        },
        ordinal : function (number) {
            var b = number % 10;
            return (~~ (number % 100 / 10) === 1) ? 'th' :
                (b === 1) ? 'st' :
                (b === 2) ? 'nd' :
                (b === 3) ? 'rd' : 'th';
        }
    });

    // helper function for _date.from() and _date.fromNow()
    function substituteTimeAgo(string, number, withoutSuffix) {
        var rt = moment.relativeTime[string];
        return (typeof rt === 'function') ?
            rt(number || 1, !!withoutSuffix, string) :
            rt.replace(/%d/i, number || 1);
    }

    function relativeTime(milliseconds, withoutSuffix) {
        var seconds = round(Math.abs(milliseconds) / 1000),
            minutes = round(seconds / 60),
            hours = round(minutes / 60),
            days = round(hours / 24),
            years = round(days / 365),
            args = seconds < 45 && ['s', seconds] ||
                minutes === 1 && ['m'] ||
                minutes < 45 && ['mm', minutes] ||
                hours === 1 && ['h'] ||
                hours < 22 && ['hh', hours] ||
                days === 1 && ['d'] ||
                days <= 25 && ['dd', days] ||
                days <= 45 && ['M'] ||
                days < 345 && ['MM', round(days / 30)] ||
                years === 1 && ['y'] || ['yy', years];
        args[2] = withoutSuffix;
        return substituteTimeAgo.apply({}, args);
    }

    // shortcut for prototype
    moment.fn = Moment.prototype = {

        clone : function () {
            return moment(this);
        },

        valueOf : function () {
            return +this._d;
        },

        nativeDate : function () {
            return this._d;
        },

        toString : function () {
            return this._d.toString();
        },

        toDate : function () {
            return this._d;
        },

        format : function (inputString) {
            return formatDate(this._d, inputString);
        },

        add : function (input, val) {
            this._d = dateAddRemove(this._d, input, 1, val);
            return this;
        },

        subtract : function (input, val) {
            this._d = dateAddRemove(this._d, input, -1, val);
            return this;
        },

        diff : function (input, val, asFloat) {
            var inputMoment = moment(input),
                diff = this._d - inputMoment._d,
                year = this.year() - inputMoment.year(),
                month = this.month() - inputMoment.month(),
                day = this.day() - inputMoment.day(),
                output;
            if (val === 'months') {
                output = year * 12 + month + day / 30;
            } else if (val === 'years') {
                output = year + month / 12;
            } else {
                output = val === 'seconds' ? diff / 1e3 : // 1000
                    val === 'minutes' ? diff / 6e4 : // 1000 * 60
                    val === 'hours' ? diff / 36e5 : // 1000 * 60 * 60
                    val === 'days' ? diff / 864e5 : // 1000 * 60 * 60 * 24
                    val === 'weeks' ? diff / 6048e5 : // 1000 * 60 * 60 * 24 * 7
                    val === 'days' ? diff / 3600 : diff;
            }
            return asFloat ? output : round(output);
        },

        from : function (time, withoutSuffix) {
            var difference = this.diff(time),
                rel = moment.relativeTime,
                output = relativeTime(difference, withoutSuffix);
            return withoutSuffix ? output : (difference <= 0 ? rel.past : rel.future).replace(/%s/i, output);
        },

        fromNow : function (withoutSuffix) {
            return this.from(moment(), withoutSuffix);
        },

        calendar : function () {
            var today = moment(),
                todayAtZeroHour = moment([today.year(), today.month(), today.date()]),
                diff = this.diff(todayAtZeroHour, 'days', true),
                calendar = moment.calendar,
                allElse = calendar.sameElse,
                format = diff < -6 ? allElse :
                diff < -1 ? calendar.lastWeek :
                diff < 0 ? calendar.lastDay :
                diff < 1 ? calendar.sameDay :
                diff < 2 ? calendar.nextDay :
                diff < 7 ? calendar.nextWeek : allElse;
            return this.format(typeof format === 'function' ? format.apply(this) : format);
        },

        isLeapYear : function () {
            var year = this.year();
            return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
        },

        isDST : function () {
            return this.zone() !== moment([this.year()]).zone();
        },

        day : function (input) {
            var day = this._d.getDay();
            return (typeof input === 'undefined') ? day :
                this.add({ d : input - day });
        }
    };

    // helper for adding shortcuts
    function makeShortcut(name, key) {
        moment.fn[name] = function (input) {
            if (typeof input !== 'undefined') {
                this._d['set' + key](input);
                return this;
            } else {
                return this._d['get' + key]();
            }
        };
    }

    // loop through and add shortcuts (Month, Date, Hours, Minutes, Seconds, Milliseconds)
    for (i = 0; i < shortcuts.length; i ++) {
        makeShortcut(shortcuts[i].toLowerCase(), shortcuts[i]);
    }

    // add shortcut for year (uses different syntax than the getter/setter 'year' == 'FullYear')
    makeShortcut('year', 'FullYear');

    // add shortcut for timezone offset (no setter)
    moment.fn.zone = function () {
        return this._d.getTimezoneOffset();
    };

	return moment;
})(Date);


//function to reset the date object to 00:00 GMT
moment.fn.stripTime = function () {
	this._d = new Date(Math.floor(this._d.valueOf() / 86400000) * 86400000);
	return this;
}


//function to get the total number of days since the epoch.
moment.fn.yearDay = function (input) {
	var yearday = Math.floor(this._d / 86400000);
    return (typeof input === 'undefined') ? yearday :
        this.add({ d : input - yearday });
}

today = moment().stripTime();

if (typeof jQuery !== 'undefined') {
	jQuery.fn.kalendae = function (options) {
		this.each(function (i, e) {
			if (e.tagName === 'INPUT') {
				//if element is an input, bind a popup calendar to the input.
				$(e).data('kalendae', new Kalendae.Input(e, options));
			} else {
				//otherwise, insert a flat calendar into the element.
				$(e).data('kalendae', new Kalendae($.extend({}, {attachTo:e}, options)));
			}
		});
		return this;
	}
}


})();