/* =========================================================
 * 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, .btn') : false;
    this.hasInput = this.component && this.element.find('input').length;
    if(this.component && this.component.length === 0)
      this.component = false;

    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);
    this._buildEvents();
    this._attachEvents();

    if(this.isInline) {
      this.picker.addClass('datepicker-inline').appendTo(this.element);
    } else {
      this.picker.addClass('datepicker-dropdown dropdown-menu');
    }
    if (this.isRTL){
      this.picker.addClass('datepicker-rtl');
      this.picker.find('.prev i, .next i')
            .toggleClass('fa fa-arrow-left fa fa-arrow-right');
    }

    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.minViewMode = options.minViewMode||this.element.data('date-min-view-mode')||0;
    if (typeof this.minViewMode === 'string') {
      switch (this.minViewMode) {
        case 'months':
          this.minViewMode = 1;
          break;
        case 'years':
          this.minViewMode = 2;
          break;
        default:
          this.minViewMode = 0;
          break;
      }
    }

    this.viewMode = this.startViewMode = Math.max(this.startViewMode, this.minViewMode);

    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._allow_update = false;

    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.setRange(options.range);

    this._allow_update = true;

    this.update();
    this.showMode();

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

  Datepicker.prototype = {
    constructor: Datepicker,

    _events: [],
    _secondaryEvents: [],
    _applyEvents: function(evs){
      for (var i=0, el, ev; i<evs.length; i++){
        el = evs[i][0];
        ev = evs[i][1];
        el.on(ev);
      }
    },
    _unapplyEvents: function(evs){
      for (var i=0, el, ev; i<evs.length; i++){
        el = evs[i][0];
        ev = evs[i][1];
        el.off(ev);
      }
    },
    _buildEvents: function(){
      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)
          }]
        ];
      }

      this._secondaryEvents = [
        [this.picker, {
          click: $.proxy(this.click, this)
        }],
        [$(window), {
          resize: $.proxy(this.place, this)
        }],
        [$(document), {
          mousedown: $.proxy(function (e) {
            // Clicked outside the datepicker, hide it
            if ($(e.target).closest('.datepicker.datepicker-inline, .datepicker.datepicker-dropdown').length === 0) {
              this.hide();
            }
          }, this)
        }]
      ];
    },
    _attachEvents: function(){
      this._detachEvents();
      this._applyEvents(this._events);
    },
    _detachEvents: function(){
      this._unapplyEvents(this._events);
    },
    _attachSecondaryEvents: function(){
      this._detachSecondaryEvents();
      this._applyEvents(this._secondaryEvents);
    },
    _detachSecondaryEvents: function(){
      this._unapplyEvents(this._secondaryEvents);
    },

    show: function(e) {
      if (!this.isInline)
        this.picker.appendTo('body');
      this.picker.show();
      this.height = this.component ? this.component.outerHeight() : this.element.outerHeight();
      this.place();
      this._attachSecondaryEvents();
      if (e) {
        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().detach();
      this._detachSecondaryEvents();
      this.viewMode = this.startViewMode;
      this.showMode();

      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.hide();
      this._detachEvents();
      this._detachSecondaryEvents();
      this.picker.remove();
      delete this.element.data().datepicker;
      if (!this.isInput) {
        delete this.element.data().date;
      }
    },

    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);
        }
      } 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.parent().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
      });
    },

    _allow_update: true,
    update: function(){
      if (!this._allow_update) return;

      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();
        delete this.element.data().date;
      }

      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);
    },

    setRange: function(range){
      if (!range || !range.length)
        delete this.range;
      else
        this.range = $.map(range, function(d){ return d.valueOf(); });
      this.fill();
    },

    getClassNames: function(date){
      var cls = [],
        year = this.viewDate.getUTCFullYear(),
        month = this.viewDate.getUTCMonth(),
        currentDate = this.date.valueOf(),
        today = new Date();
      if (date.getUTCFullYear() < year || (date.getUTCFullYear() == year && date.getUTCMonth() < month)) {
        cls.push('old');
      } else if (date.getUTCFullYear() > year || (date.getUTCFullYear() == year && date.getUTCMonth() > month)) {
        cls.push('new');
      }
      // Compare internal UTC date with local today, not UTC today
      if (this.todayHighlight &&
        date.getUTCFullYear() == today.getFullYear() &&
        date.getUTCMonth() == today.getMonth() &&
        date.getUTCDate() == today.getDate()) {
        cls.push('today');
      }
      if (currentDate && date.valueOf() == currentDate) {
        cls.push('active');
      }
      if (date.valueOf() < this.startDate || date.valueOf() > this.endDate ||
        $.inArray(date.getUTCDay(), this.daysOfWeekDisabled) !== -1) {
        cls.push('disabled');
      }
      if (this.range){
        if (date > this.range[0] && date < this.range[this.range.length-1]){
          cls.push('range');
        }
        if ($.inArray(date.valueOf(), this.range) != -1){
          cls.push('selected');
        }
      }
      return cls;
    },

    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();
      this.picker.find('.datepicker-days thead th.datepicker-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){
            // ISO 8601: First week contains first thursday.
            // ISO also states week starts on Monday, but we can be more abstract here.
            var
              // Start of current week: based on weekstart/current date
              ws = new Date(+prevMonth + (this.weekStart - prevMonth.getUTCDay() - 7) % 7 * 864e5),
              // Thursday of this week
              th = new Date(+ws + (7 + 4 - ws.getUTCDay()) % 7 * 864e5),
              // First Thursday of year, year from thursday
              yth = new Date(+(yth = UTCDate(th.getUTCFullYear(), 0, 1)) + (7 + 4 - yth.getUTCDay())%7*864e5),
              // Calendar week: ms between thursdays, div ms per day, div 7 days
              calWeek =  (th - yth) / 864e5 / 7 + 1;
            html.push('<td class="cw">'+ calWeek +'</td>');

          }
        }
        clsName = this.getClassNames(prevMonth);
        clsName.push('day');
        html.push('<td class="'+clsName.join(' ')+'">'+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() {
      if (!this._allow_update) return;

      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.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 'datepicker-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 day = 1;
                var month = target.parent().find('span').index(target);
                var year = this.viewDate.getUTCFullYear();
                this.viewDate.setUTCMonth(month);
                this.element.trigger({
                  type: 'changeMonth',
                  date: this.viewDate
                });
                if ( this.minViewMode == 1 ) {
                  this._setDate(UTCDate(year, month, day,0,0,0,0));
                }
              } else {
                var year = parseInt(target.text(), 10)||0;
                var day = 1;
                var month = 0;
                this.viewDate.setUTCFullYear(year);
                this.element.trigger({
                  type: 'changeYear',
                  date: this.viewDate
                });
                if ( this.minViewMode == 2 ) {
                  this._setDate(UTCDate(year, month, day,0,0,0,0));
                }
              }
              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(this.minViewMode, 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();
    }
  };

  var DateRangePicker = function(element, options){
    this.element = $(element);
    this.inputs = $.map(options.inputs, function(i){ return i.jquery ? i[0] : i; });
    delete options.inputs;

    $(this.inputs)
      .datepicker(options)
      .bind('changeDate', $.proxy(this.dateUpdated, this));

    this.pickers = $.map(this.inputs, function(i){ return $(i).data('datepicker'); });
    this.updateDates();
  };
  DateRangePicker.prototype = {
    updateDates: function(){
      this.dates = $.map(this.pickers, function(i){ return i.date; });
      this.updateRanges();
    },
    updateRanges: function(){
      var range = $.map(this.dates, function(d){ return d.valueOf(); });
      $.each(this.pickers, function(i, p){
        p.setRange(range);
      });
    },
    dateUpdated: function(e){
      var dp = $(e.target).data('datepicker'),
        new_date = e.date,
        i = $.inArray(e.target, this.inputs),
        l = this.inputs.length;
      if (i == -1) return;

      if (new_date < this.dates[i]){
        // Date being moved earlier/left
        while (i>=0 && new_date < this.dates[i]){
          this.pickers[i--].setUTCDate(new_date);
        }
      }
      else if (new_date > this.dates[i]){
        // Date being moved later/right
        while (i<l && new_date > this.dates[i]){
          this.pickers[i++].setUTCDate(new_date);
        }
      }
      this.updateDates();
    },
    remove: function(){
      $.map(this.pickers, function(p){ p.remove(); });
      delete this.element.data().datepicker;
    }
  };

  var old = $.fn.datepicker;
  $.fn.datepicker = function ( option ) {
    var args = Array.apply(null, arguments);
    args.shift();
    return this.each(function () {
      var $this = $(this),
        data = $this.data('datepicker'),
        options = typeof option == 'object' && option;
      if (!data) {
        if ($this.is('.input-daterange') || options.inputs){
          var opts = {
            inputs: options.inputs || $this.find('input').toArray()
          };
          $this.data('datepicker', (data = new DateRangePicker(this, $.extend(opts, $.fn.datepicker.defaults,options))));
        }
        else{
          $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="fa fa-arrow-left"/></th>'+
                '<th colspan="5" class="datepicker-switch"></th>'+
                '<th class="next"><i class="fa fa-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;


  /* DATEPICKER NO CONFLICT
  * =================== */

  $.fn.datepicker.noConflict = function(){
    $.fn.datepicker = old;
    return this;
  };


  /* DATEPICKER DATA-API
  * ================== */

  $(document).on(
    'focus.datepicker.data-api click.datepicker.data-api',
    '[data-provide="datepicker"]',
    function(e){
      var $this = $(this);
      if ($this.data('datepicker')) return;
      e.preventDefault();
      // component click requires us to explicitly show it
      $this.datepicker('show');
    }
  );
  $(function(){
    $('[data-provide="datepicker-inline"]').datepicker();
  });

}( window.jQuery );