/* =========================================================
 * bootstrap-datepicker.js
 * http://www.eyecon.ro/bootstrap-datepicker
 * =========================================================
 * Copyright 2012 Stefan Petre
 * Improvements by Andrew Rowls
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================= */

!function( $ ) {

	function UTCDate(){
		return new Date(Date.UTC.apply(Date, arguments));
	}
	function UTCToday(){
		var today = new Date();
		return UTCDate(today.getUTCFullYear(), today.getUTCMonth(), today.getUTCDate());
	}

	// Picker object

	var Datepicker = function(element, options) {
		var that = this;

		this.element = $(element);
		this.language = options.language||this.element.data('date-language')||"en";
		this.language = this.language in dates ? this.language : this.language.split('-')[0]; //Check if "de-DE" style date is available, if not language should fallback to 2 letter code eg "de"
		this.language = this.language in dates ? this.language : "en";
		this.isRTL = dates[this.language].rtl||false;
		this.format = DPGlobal.parseFormat(options.format||this.element.data('date-format')||dates[this.language].format||'mm/dd/yyyy');
		this.isInline = false;
		this.isInput = this.element.is('input');
		this.component = this.element.is('.date') ? this.element.find('.add-on') : false;
		this.hasInput = this.component && this.element.find('input').length;
		if(this.component && this.component.length === 0)
			this.component = false;

		this._attachEvents();

		this.forceParse = true;
		if ('forceParse' in options) {
			this.forceParse = options.forceParse;
		} else if ('dateForceParse' in this.element.data()) {
			this.forceParse = this.element.data('date-force-parse');
		}


		this.picker = $(DPGlobal.template)
							.appendTo(this.isInline ? this.element : 'body')
							.on({
								click: $.proxy(this.click, this),
								mousedown: $.proxy(this.mousedown, this)
							});

		if(this.isInline) {
			this.picker.addClass('datepicker-inline');
		} else {
			this.picker.addClass('datepicker-dropdown dropdown-menu');
		}
		if (this.isRTL){
			this.picker.addClass('datepicker-rtl');
			this.picker.find('.prev i, .next i')
						.toggleClass('icon-arrow-left icon-arrow-right');
		}
		$(document).on('mousedown', function (e) {
			// Clicked outside the datepicker, hide it
			if ($(e.target).closest('.datepicker.datepicker-inline, .datepicker.datepicker-dropdown').length === 0) {
				that.hide();
			}
		});

		this.autoclose = false;
		if ('autoclose' in options) {
			this.autoclose = options.autoclose;
		} else if ('dateAutoclose' in this.element.data()) {
			this.autoclose = this.element.data('date-autoclose');
		}

		this.keyboardNavigation = true;
		if ('keyboardNavigation' in options) {
			this.keyboardNavigation = options.keyboardNavigation;
		} else if ('dateKeyboardNavigation' in this.element.data()) {
			this.keyboardNavigation = this.element.data('date-keyboard-navigation');
		}

		this.viewMode = this.startViewMode = 0;
		switch(options.startView || this.element.data('date-start-view')){
			case 2:
			case 'decade':
				this.viewMode = this.startViewMode = 2;
				break;
			case 1:
			case 'year':
				this.viewMode = this.startViewMode = 1;
				break;
		}

		this.todayBtn = (options.todayBtn||this.element.data('date-today-btn')||false);
		this.todayHighlight = (options.todayHighlight||this.element.data('date-today-highlight')||false);

		this.calendarWeeks = false;
		if ('calendarWeeks' in options) {
			this.calendarWeeks = options.calendarWeeks;
		} else if ('dateCalendarWeeks' in this.element.data()) {
			this.calendarWeeks = this.element.data('date-calendar-weeks');
		}
		if (this.calendarWeeks)
			this.picker.find('tfoot th.today')
						.attr('colspan', function(i, val){
							return parseInt(val) + 1;
						});

		this.weekStart = ((options.weekStart||this.element.data('date-weekstart')||dates[this.language].weekStart||0) % 7);
		this.weekEnd = ((this.weekStart + 6) % 7);
		this.startDate = -Infinity;
		this.endDate = Infinity;
		this.daysOfWeekDisabled = [];
		this.setStartDate(options.startDate||this.element.data('date-startdate'));
		this.setEndDate(options.endDate||this.element.data('date-enddate'));
		this.setDaysOfWeekDisabled(options.daysOfWeekDisabled||this.element.data('date-days-of-week-disabled'));
		this.fillDow();
		this.fillMonths();
		this.update();
		this.showMode();

		if(this.isInline) {
			this.show();
		}
	};

	Datepicker.prototype = {
		constructor: Datepicker,

		_events: [],
		_attachEvents: function(){
			this._detachEvents();
			if (this.isInput) { // single input
				this._events = [
					[this.element, {
						focus: $.proxy(this.show, this),
						keyup: $.proxy(this.update, this),
						keydown: $.proxy(this.keydown, this)
					}]
				];
			}
			else if (this.component && this.hasInput){ // component: input + button
				this._events = [
					// For components that are not readonly, allow keyboard nav
					[this.element.find('input'), {
						focus: $.proxy(this.show, this),
						keyup: $.proxy(this.update, this),
						keydown: $.proxy(this.keydown, this)
					}],
					[this.component, {
						click: $.proxy(this.show, this)
					}]
				];
			}
						else if (this.element.is('div')) {  // inline datepicker
							this.isInline = true;
						}
			else {
				this._events = [
					[this.element, {
						click: $.proxy(this.show, this)
					}]
				];
			}
			for (var i=0, el, ev; i<this._events.length; i++){
				el = this._events[i][0];
				ev = this._events[i][1];
				el.on(ev);
			}
		},
		_detachEvents: function(){
			for (var i=0, el, ev; i<this._events.length; i++){
				el = this._events[i][0];
				ev = this._events[i][1];
				el.off(ev);
			}
			this._events = [];
		},

		show: function(e) {
			this.picker.show();
			this.height = this.component ? this.component.outerHeight() : this.element.outerHeight();
			this.update();
			this.place();
			$(window).on('resize', $.proxy(this.place, this));
			if (e ) {
				e.stopPropagation();
				e.preventDefault();
			}
			this.element.trigger({
				type: 'show',
				date: this.date
			});
		},

		hide: function(e){
			if(this.isInline) return;
			if (!this.picker.is(':visible')) return;
			this.picker.hide();
			$(window).off('resize', this.place);
			this.viewMode = this.startViewMode;
			this.showMode();
			if (!this.isInput) {
				$(document).off('mousedown', this.hide);
			}

			if (
				this.forceParse &&
				(
					this.isInput && this.element.val() ||
					this.hasInput && this.element.find('input').val()
				)
			)
				this.setValue();
			this.element.trigger({
				type: 'hide',
				date: this.date
			});
		},

		remove: function() {
			this._detachEvents();
			this.picker.remove();
			delete this.element.data().datepicker;
		},

		getDate: function() {
			var d = this.getUTCDate();
			return new Date(d.getTime() + (d.getTimezoneOffset()*60000));
		},

		getUTCDate: function() {
			return this.date;
		},

		setDate: function(d) {
			this.setUTCDate(new Date(d.getTime() - (d.getTimezoneOffset()*60000)));
		},

		setUTCDate: function(d) {
			this.date = d;
			this.setValue();
		},

		setValue: function() {
			var formatted = this.getFormattedDate();
			if (!this.isInput) {
				if (this.component){
					this.element.find('input').val(formatted);
				}
				this.element.data('date', formatted);
			} else {
				this.element.val(formatted);
			}
		},

		getFormattedDate: function(format) {
			if (format === undefined)
				format = this.format;
			return DPGlobal.formatDate(this.date, format, this.language);
		},

		setStartDate: function(startDate){
			this.startDate = startDate||-Infinity;
			if (this.startDate !== -Infinity) {
				this.startDate = DPGlobal.parseDate(this.startDate, this.format, this.language);
			}
			this.update();
			this.updateNavArrows();
		},

		setEndDate: function(endDate){
			this.endDate = endDate||Infinity;
			if (this.endDate !== Infinity) {
				this.endDate = DPGlobal.parseDate(this.endDate, this.format, this.language);
			}
			this.update();
			this.updateNavArrows();
		},

		setDaysOfWeekDisabled: function(daysOfWeekDisabled){
			this.daysOfWeekDisabled = daysOfWeekDisabled||[];
			if (!$.isArray(this.daysOfWeekDisabled)) {
				this.daysOfWeekDisabled = this.daysOfWeekDisabled.split(/,\s*/);
			}
			this.daysOfWeekDisabled = $.map(this.daysOfWeekDisabled, function (d) {
				return parseInt(d, 10);
			});
			this.update();
			this.updateNavArrows();
		},

		place: function(){
						if(this.isInline) return;
			var zIndex = parseInt(this.element.parents().filter(function() {
							return $(this).css('z-index') != 'auto';
						}).first().css('z-index'))+10;
			var offset = this.component ? this.component.offset() : this.element.offset();
			var height = this.component ? this.component.outerHeight(true) : this.element.outerHeight(true);
			this.picker.css({
				top: offset.top + height,
				left: offset.left,
				zIndex: zIndex
			});
		},

		update: function(){
			var date, fromArgs = false;
			if(arguments && arguments.length && (typeof arguments[0] === 'string' || arguments[0] instanceof Date)) {
				date = arguments[0];
				fromArgs = true;
			} else {
				date = this.isInput ? this.element.val() : this.element.data('date') || this.element.find('input').val();
			}

			this.date = DPGlobal.parseDate(date, this.format, this.language);

			if(fromArgs) this.setValue();

			if (this.date < this.startDate) {
				this.viewDate = new Date(this.startDate);
			} else if (this.date > this.endDate) {
				this.viewDate = new Date(this.endDate);
			} else {
				this.viewDate = new Date(this.date);
			}
			this.fill();
		},

		fillDow: function(){
			var dowCnt = this.weekStart,
			html = '<tr>';
			if(this.calendarWeeks){
				var cell = '<th class="cw">&nbsp;</th>';
				html += cell;
				this.picker.find('.datepicker-days thead tr:first-child').prepend(cell);
			}
			while (dowCnt < this.weekStart + 7) {
				html += '<th class="dow">'+dates[this.language].daysMin[(dowCnt++)%7]+'</th>';
			}
			html += '</tr>';
			this.picker.find('.datepicker-days thead').append(html);
		},

		fillMonths: function(){
			var html = '',
			i = 0;
			while (i < 12) {
				html += '<span class="month">'+dates[this.language].monthsShort[i++]+'</span>';
			}
			this.picker.find('.datepicker-months td').html(html);
		},

		fill: function() {
			var d = new Date(this.viewDate),
				year = d.getUTCFullYear(),
				month = d.getUTCMonth(),
				startYear = this.startDate !== -Infinity ? this.startDate.getUTCFullYear() : -Infinity,
				startMonth = this.startDate !== -Infinity ? this.startDate.getUTCMonth() : -Infinity,
				endYear = this.endDate !== Infinity ? this.endDate.getUTCFullYear() : Infinity,
				endMonth = this.endDate !== Infinity ? this.endDate.getUTCMonth() : Infinity,
				currentDate = this.date && this.date.valueOf(),
				today = new Date();
			this.picker.find('.datepicker-days thead th.switch')
						.text(dates[this.language].months[month]+' '+year);
			this.picker.find('tfoot th.today')
						.text(dates[this.language].today)
						.toggle(this.todayBtn !== false);
			this.updateNavArrows();
			this.fillMonths();
			var prevMonth = UTCDate(year, month-1, 28,0,0,0,0),
				day = DPGlobal.getDaysInMonth(prevMonth.getUTCFullYear(), prevMonth.getUTCMonth());
			prevMonth.setUTCDate(day);
			prevMonth.setUTCDate(day - (prevMonth.getUTCDay() - this.weekStart + 7)%7);
			var nextMonth = new Date(prevMonth);
			nextMonth.setUTCDate(nextMonth.getUTCDate() + 42);
			nextMonth = nextMonth.valueOf();
			var html = [];
			var clsName;
			while(prevMonth.valueOf() < nextMonth) {
				if (prevMonth.getUTCDay() == this.weekStart) {
					html.push('<tr>');
					if(this.calendarWeeks){
						// adapted from https://github.com/timrwood/moment/blob/master/moment.js#L128
						var a = new Date(prevMonth.getUTCFullYear(), prevMonth.getUTCMonth(), prevMonth.getUTCDate() - prevMonth.getDay() + 10 - (this.weekStart && this.weekStart%7 < 5 && 7)),
							b = new Date(a.getFullYear(), 0, 4),
							calWeek =  ~~((a - b) / 864e5 / 7 + 1.5);
						html.push('<td class="cw">'+ calWeek +'</td>');
					}
				}
				clsName = '';
				if (prevMonth.getUTCFullYear() < year || (prevMonth.getUTCFullYear() == year && prevMonth.getUTCMonth() < month)) {
					clsName += ' old';
				} else if (prevMonth.getUTCFullYear() > year || (prevMonth.getUTCFullYear() == year && prevMonth.getUTCMonth() > month)) {
					clsName += ' new';
				}
				// Compare internal UTC date with local today, not UTC today
				if (this.todayHighlight &&
					prevMonth.getUTCFullYear() == today.getFullYear() &&
					prevMonth.getUTCMonth() == today.getMonth() &&
					prevMonth.getUTCDate() == today.getDate()) {
					clsName += ' today';
				}
				if (currentDate && prevMonth.valueOf() == currentDate) {
					clsName += ' active';
				}
				if (prevMonth.valueOf() < this.startDate || prevMonth.valueOf() > this.endDate ||
					$.inArray(prevMonth.getUTCDay(), this.daysOfWeekDisabled) !== -1) {
					clsName += ' disabled';
				}
				html.push('<td class="day'+clsName+'">'+prevMonth.getUTCDate() + '</td>');
				if (prevMonth.getUTCDay() == this.weekEnd) {
					html.push('</tr>');
				}
				prevMonth.setUTCDate(prevMonth.getUTCDate()+1);
			}
			this.picker.find('.datepicker-days tbody').empty().append(html.join(''));
			var currentYear = this.date && this.date.getUTCFullYear();

			var months = this.picker.find('.datepicker-months')
						.find('th:eq(1)')
							.text(year)
							.end()
						.find('span').removeClass('active');
			if (currentYear && currentYear == year) {
				months.eq(this.date.getUTCMonth()).addClass('active');
			}
			if (year < startYear || year > endYear) {
				months.addClass('disabled');
			}
			if (year == startYear) {
				months.slice(0, startMonth).addClass('disabled');
			}
			if (year == endYear) {
				months.slice(endMonth+1).addClass('disabled');
			}

			html = '';
			year = parseInt(year/10, 10) * 10;
			var yearCont = this.picker.find('.datepicker-years')
								.find('th:eq(1)')
									.text(year + '-' + (year + 9))
									.end()
								.find('td');
			year -= 1;
			for (var i = -1; i < 11; i++) {
				html += '<span class="year'+(i == -1 || i == 10 ? ' old' : '')+(currentYear == year ? ' active' : '')+(year < startYear || year > endYear ? ' disabled' : '')+'">'+year+'</span>';
				year += 1;
			}
			yearCont.html(html);
		},

		updateNavArrows: function() {
			var d = new Date(this.viewDate),
				year = d.getUTCFullYear(),
				month = d.getUTCMonth();
			switch (this.viewMode) {
				case 0:
					if (this.startDate !== -Infinity && year <= this.startDate.getUTCFullYear() && month <= this.startDate.getUTCMonth()) {
						this.picker.find('.prev').css({visibility: 'hidden'});
					} else {
						this.picker.find('.prev').css({visibility: 'visible'});
					}
					if (this.endDate !== Infinity && year >= this.endDate.getUTCFullYear() && month >= this.endDate.getUTCMonth()) {
						this.picker.find('.next').css({visibility: 'hidden'});
					} else {
						this.picker.find('.next').css({visibility: 'visible'});
					}
					break;
				case 1:
				case 2:
					if (this.startDate !== -Infinity && year <= this.startDate.getUTCFullYear()) {
						this.picker.find('.prev').css({visibility: 'hidden'});
					} else {
						this.picker.find('.prev').css({visibility: 'visible'});
					}
					if (this.endDate !== Infinity && year >= this.endDate.getUTCFullYear()) {
						this.picker.find('.next').css({visibility: 'hidden'});
					} else {
						this.picker.find('.next').css({visibility: 'visible'});
					}
					break;
			}
		},

		click: function(e) {
			e.stopPropagation();
			e.preventDefault();
			var target = $(e.target).closest('span, td, th');
			if (target.length == 1) {
				switch(target[0].nodeName.toLowerCase()) {
					case 'th':
						switch(target[0].className) {
							case 'switch':
								this.showMode(1);
								break;
							case 'prev':
							case 'next':
								var dir = DPGlobal.modes[this.viewMode].navStep * (target[0].className == 'prev' ? -1 : 1);
								switch(this.viewMode){
									case 0:
										this.viewDate = this.moveMonth(this.viewDate, dir);
										break;
									case 1:
									case 2:
										this.viewDate = this.moveYear(this.viewDate, dir);
										break;
								}
								this.fill();
								break;
							case 'today':
								var date = new Date();
								date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);

								this.showMode(-2);
								var which = this.todayBtn == 'linked' ? null : 'view';
								this._setDate(date, which);
								break;
						}
						break;
					case 'span':
						if (!target.is('.disabled')) {
							this.viewDate.setUTCDate(1);
							if (target.is('.month')) {
								var month = target.parent().find('span').index(target);
								this.viewDate.setUTCMonth(month);
								this.element.trigger({
									type: 'changeMonth',
									date: this.viewDate
								});
							} else {
								var year = parseInt(target.text(), 10)||0;
								this.viewDate.setUTCFullYear(year);
								this.element.trigger({
									type: 'changeYear',
									date: this.viewDate
								});
							}
							this.showMode(-1);
							this.fill();
						}
						break;
					case 'td':
						if (target.is('.day') && !target.is('.disabled')){
							var day = parseInt(target.text(), 10)||1;
							var year = this.viewDate.getUTCFullYear(),
								month = this.viewDate.getUTCMonth();
							if (target.is('.old')) {
								if (month === 0) {
									month = 11;
									year -= 1;
								} else {
									month -= 1;
								}
							} else if (target.is('.new')) {
								if (month == 11) {
									month = 0;
									year += 1;
								} else {
									month += 1;
								}
							}
							this._setDate(UTCDate(year, month, day,0,0,0,0));
						}
						break;
				}
			}
		},

		_setDate: function(date, which){
			if (!which || which == 'date')
				this.date = date;
			if (!which || which  == 'view')
				this.viewDate = date;
			this.fill();
			this.setValue();
			this.element.trigger({
				type: 'changeDate',
				date: this.date
			});
			var element;
			if (this.isInput) {
				element = this.element;
			} else if (this.component){
				element = this.element.find('input');
			}
			if (element) {
				element.change();
				if (this.autoclose && (!which || which == 'date')) {
					this.hide();
				}
			}
		},

		moveMonth: function(date, dir){
			if (!dir) return date;
			var new_date = new Date(date.valueOf()),
				day = new_date.getUTCDate(),
				month = new_date.getUTCMonth(),
				mag = Math.abs(dir),
				new_month, test;
			dir = dir > 0 ? 1 : -1;
			if (mag == 1){
				test = dir == -1
					// If going back one month, make sure month is not current month
					// (eg, Mar 31 -> Feb 31 == Feb 28, not Mar 02)
					? function(){ return new_date.getUTCMonth() == month; }
					// If going forward one month, make sure month is as expected
					// (eg, Jan 31 -> Feb 31 == Feb 28, not Mar 02)
					: function(){ return new_date.getUTCMonth() != new_month; };
				new_month = month + dir;
				new_date.setUTCMonth(new_month);
				// Dec -> Jan (12) or Jan -> Dec (-1) -- limit expected date to 0-11
				if (new_month < 0 || new_month > 11)
					new_month = (new_month + 12) % 12;
			} else {
				// For magnitudes >1, move one month at a time...
				for (var i=0; i<mag; i++)
					// ...which might decrease the day (eg, Jan 31 to Feb 28, etc)...
					new_date = this.moveMonth(new_date, dir);
				// ...then reset the day, keeping it in the new month
				new_month = new_date.getUTCMonth();
				new_date.setUTCDate(day);
				test = function(){ return new_month != new_date.getUTCMonth(); };
			}
			// Common date-resetting loop -- if date is beyond end of month, make it
			// end of month
			while (test()){
				new_date.setUTCDate(--day);
				new_date.setUTCMonth(new_month);
			}
			return new_date;
		},

		moveYear: function(date, dir){
			return this.moveMonth(date, dir*12);
		},

		dateWithinRange: function(date){
			return date >= this.startDate && date <= this.endDate;
		},

		keydown: function(e){
			if (this.picker.is(':not(:visible)')){
				if (e.keyCode == 27) // allow escape to hide and re-show picker
					this.show();
				return;
			}
			var dateChanged = false,
				dir, day, month,
				newDate, newViewDate;
			switch(e.keyCode){
				case 27: // escape
					this.hide();
					e.preventDefault();
					break;
				case 37: // left
				case 39: // right
					if (!this.keyboardNavigation) break;
					dir = e.keyCode == 37 ? -1 : 1;
					if (e.ctrlKey){
						newDate = this.moveYear(this.date, dir);
						newViewDate = this.moveYear(this.viewDate, dir);
					} else if (e.shiftKey){
						newDate = this.moveMonth(this.date, dir);
						newViewDate = this.moveMonth(this.viewDate, dir);
					} else {
						newDate = new Date(this.date);
						newDate.setUTCDate(this.date.getUTCDate() + dir);
						newViewDate = new Date(this.viewDate);
						newViewDate.setUTCDate(this.viewDate.getUTCDate() + dir);
					}
					if (this.dateWithinRange(newDate)){
						this.date = newDate;
						this.viewDate = newViewDate;
						this.setValue();
						this.update();
						e.preventDefault();
						dateChanged = true;
					}
					break;
				case 38: // up
				case 40: // down
					if (!this.keyboardNavigation) break;
					dir = e.keyCode == 38 ? -1 : 1;
					if (e.ctrlKey){
						newDate = this.moveYear(this.date, dir);
						newViewDate = this.moveYear(this.viewDate, dir);
					} else if (e.shiftKey){
						newDate = this.moveMonth(this.date, dir);
						newViewDate = this.moveMonth(this.viewDate, dir);
					} else {
						newDate = new Date(this.date);
						newDate.setUTCDate(this.date.getUTCDate() + dir * 7);
						newViewDate = new Date(this.viewDate);
						newViewDate.setUTCDate(this.viewDate.getUTCDate() + dir * 7);
					}
					if (this.dateWithinRange(newDate)){
						this.date = newDate;
						this.viewDate = newViewDate;
						this.setValue();
						this.update();
						e.preventDefault();
						dateChanged = true;
					}
					break;
				case 13: // enter
					this.hide();
					e.preventDefault();
					break;
				case 9: // tab
					this.hide();
					break;
			}
			if (dateChanged){
				this.element.trigger({
					type: 'changeDate',
					date: this.date
				});
				var element;
				if (this.isInput) {
					element = this.element;
				} else if (this.component){
					element = this.element.find('input');
				}
				if (element) {
					element.change();
				}
			}
		},

		showMode: function(dir) {
			if (dir) {
				this.viewMode = Math.max(0, Math.min(2, this.viewMode + dir));
			}
			/*
				vitalets: fixing bug of very special conditions:
				jquery 1.7.1 + webkit + show inline datepicker in bootstrap popover.
				Method show() does not set display css correctly and datepicker is not shown.
				Changed to .css('display', 'block') solve the problem.
				See https://github.com/vitalets/x-editable/issues/37

				In jquery 1.7.2+ everything works fine.
			*/
			//this.picker.find('>div').hide().filter('.datepicker-'+DPGlobal.modes[this.viewMode].clsName).show();
			this.picker.find('>div').hide().filter('.datepicker-'+DPGlobal.modes[this.viewMode].clsName).css('display', 'block');
			this.updateNavArrows();
		}
	};

	$.fn.datepicker = function ( option ) {
		var args = Array.apply(null, arguments);
		args.shift();
		return this.each(function () {
			var $this = $(this),
				data = $this.data('datepicker'),
				options = typeof option == 'object' && option;
			if (!data) {
				$this.data('datepicker', (data = new Datepicker(this, $.extend({}, $.fn.datepicker.defaults,options))));
			}
			if (typeof option == 'string' && typeof data[option] == 'function') {
				data[option].apply(data, args);
			}
		});
	};

	$.fn.datepicker.defaults = {
	};
	$.fn.datepicker.Constructor = Datepicker;
	var dates = $.fn.datepicker.dates = {
		en: {
			days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],
			daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
			daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
			months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
			monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
			today: "Today"
		}
	};

	var DPGlobal = {
		modes: [
			{
				clsName: 'days',
				navFnc: 'Month',
				navStep: 1
			},
			{
				clsName: 'months',
				navFnc: 'FullYear',
				navStep: 1
			},
			{
				clsName: 'years',
				navFnc: 'FullYear',
				navStep: 10
		}],
		isLeapYear: function (year) {
			return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));
		},
		getDaysInMonth: function (year, month) {
			return [31, (DPGlobal.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
		},
		validParts: /dd?|DD?|mm?|MM?|yy(?:yy)?/g,
		nonpunctuation: /[^ -\/:-@\[\u3400-\u9fff-`{-~\t\n\r]+/g,
		parseFormat: function(format){
			// IE treats \0 as a string end in inputs (truncating the value),
			// so it's a bad format delimiter, anyway
			var separators = format.replace(this.validParts, '\0').split('\0'),
				parts = format.match(this.validParts);
			if (!separators || !separators.length || !parts || parts.length === 0){
				throw new Error("Invalid date format.");
			}
			return {separators: separators, parts: parts};
		},
		parseDate: function(date, format, language) {
			if (date instanceof Date) return date;
			if (/^[\-+]\d+[dmwy]([\s,]+[\-+]\d+[dmwy])*$/.test(date)) {
				var part_re = /([\-+]\d+)([dmwy])/,
					parts = date.match(/([\-+]\d+)([dmwy])/g),
					part, dir;
				date = new Date();
				for (var i=0; i<parts.length; i++) {
					part = part_re.exec(parts[i]);
					dir = parseInt(part[1]);
					switch(part[2]){
						case 'd':
							date.setUTCDate(date.getUTCDate() + dir);
							break;
						case 'm':
							date = Datepicker.prototype.moveMonth.call(Datepicker.prototype, date, dir);
							break;
						case 'w':
							date.setUTCDate(date.getUTCDate() + dir * 7);
							break;
						case 'y':
							date = Datepicker.prototype.moveYear.call(Datepicker.prototype, date, dir);
							break;
					}
				}
				return UTCDate(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), 0, 0, 0);
			}
			var parts = date && date.match(this.nonpunctuation) || [],
				date = new Date(),
				parsed = {},
				setters_order = ['yyyy', 'yy', 'M', 'MM', 'm', 'mm', 'd', 'dd'],
				setters_map = {
					yyyy: function(d,v){ return d.setUTCFullYear(v); },
					yy: function(d,v){ return d.setUTCFullYear(2000+v); },
					m: function(d,v){
						v -= 1;
						while (v<0) v += 12;
						v %= 12;
						d.setUTCMonth(v);
						while (d.getUTCMonth() != v)
							d.setUTCDate(d.getUTCDate()-1);
						return d;
					},
					d: function(d,v){ return d.setUTCDate(v); }
				},
				val, filtered, part;
			setters_map['M'] = setters_map['MM'] = setters_map['mm'] = setters_map['m'];
			setters_map['dd'] = setters_map['d'];
			date = UTCDate(date.getFullYear(), date.getMonth(), date.getDate(), 0, 0, 0);
			var fparts = format.parts.slice();
			// Remove noop parts
			if (parts.length != fparts.length) {
				fparts = $(fparts).filter(function(i,p){
					return $.inArray(p, setters_order) !== -1;
				}).toArray();
			}
			// Process remainder
			if (parts.length == fparts.length) {
				for (var i=0, cnt = fparts.length; i < cnt; i++) {
					val = parseInt(parts[i], 10);
					part = fparts[i];
					if (isNaN(val)) {
						switch(part) {
							case 'MM':
								filtered = $(dates[language].months).filter(function(){
									var m = this.slice(0, parts[i].length),
										p = parts[i].slice(0, m.length);
									return m == p;
								});
								val = $.inArray(filtered[0], dates[language].months) + 1;
								break;
							case 'M':
								filtered = $(dates[language].monthsShort).filter(function(){
									var m = this.slice(0, parts[i].length),
										p = parts[i].slice(0, m.length);
									return m == p;
								});
								val = $.inArray(filtered[0], dates[language].monthsShort) + 1;
								break;
						}
					}
					parsed[part] = val;
				}
				for (var i=0, s; i<setters_order.length; i++){
					s = setters_order[i];
					if (s in parsed && !isNaN(parsed[s]))
						setters_map[s](date, parsed[s]);
				}
			}
			return date;
		},
		formatDate: function(date, format, language){
			var val = {
				d: date.getUTCDate(),
				D: dates[language].daysShort[date.getUTCDay()],
				DD: dates[language].days[date.getUTCDay()],
				m: date.getUTCMonth() + 1,
				M: dates[language].monthsShort[date.getUTCMonth()],
				MM: dates[language].months[date.getUTCMonth()],
				yy: date.getUTCFullYear().toString().substring(2),
				yyyy: date.getUTCFullYear()
			};
			val.dd = (val.d < 10 ? '0' : '') + val.d;
			val.mm = (val.m < 10 ? '0' : '') + val.m;
			var date = [],
				seps = $.extend([], format.separators);
			for (var i=0, cnt = format.parts.length; i < cnt; i++) {
				if (seps.length)
					date.push(seps.shift());
				date.push(val[format.parts[i]]);
			}
			return date.join('');
		},
		headTemplate: '<thead>'+
							'<tr>'+
								'<th class="prev"><i class="icon-arrow-left"/></th>'+
								'<th colspan="5" class="switch"></th>'+
								'<th class="next"><i class="icon-arrow-right"/></th>'+
							'</tr>'+
						'</thead>',
		contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>',
		footTemplate: '<tfoot><tr><th colspan="7" class="today"></th></tr></tfoot>'
	};
	DPGlobal.template = '<div class="datepicker">'+
							'<div class="datepicker-days">'+
								'<table class=" table-condensed">'+
									DPGlobal.headTemplate+
									'<tbody></tbody>'+
									DPGlobal.footTemplate+
								'</table>'+
							'</div>'+
							'<div class="datepicker-months">'+
								'<table class="table-condensed">'+
									DPGlobal.headTemplate+
									DPGlobal.contTemplate+
									DPGlobal.footTemplate+
								'</table>'+
							'</div>'+
							'<div class="datepicker-years">'+
								'<table class="table-condensed">'+
									DPGlobal.headTemplate+
									DPGlobal.contTemplate+
									DPGlobal.footTemplate+
								'</table>'+
							'</div>'+
						'</div>';

	$.fn.datepicker.DPGlobal = DPGlobal;

}( window.jQuery );
