/* =========================================================
 * bootstrap-datepicker.js
 * http://www.eyecon.ro/bootstrap-datepicker
 * =========================================================
 * Copyright 2012 Stefan Petre
 *
 * 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( $ ) {

  // Picker object

  var Datepicker = function(element, options){
    this.element = $(element);
    this.format = DPGlobal.parseFormat(options.format||this.element.data('date-format')||'mm/dd/yyyy');
    this.picker = $(DPGlobal.template)
      .appendTo('body')
      .on({
        click: $.proxy(this.click, this)//,
        //mousedown: $.proxy(this.mousedown, this)
      });
    this.isInput = this.element.is('input');
    this.component = this.element.is('.date') ? this.element.find('.add-on') : false;

    if (this.isInput) {
      this.element.on({
        focus: $.proxy(this.show, this),
        //blur: $.proxy(this.hide, this),
        keyup: $.proxy(this.update, this)
      });
    } else {
      if (this.component){
        this.component.on('click', $.proxy(this.show, this));
      } else {
        this.element.on('click', $.proxy(this.show, this));
      }
    }

    this.minViewMode = options.minViewMode||this.element.data('date-minviewmode')||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 = options.viewMode||this.element.data('date-viewmode')||0;
    if (typeof this.viewMode === 'string') {
      switch (this.viewMode) {
        case 'months':
          this.viewMode = 1;
          break;
        case 'years':
          this.viewMode = 2;
          break;
        default:
          this.viewMode = 0;
          break;
      }
    }
    this.startViewMode = this.viewMode;
    this.weekStart = options.weekStart||this.element.data('date-weekstart')||0;
    this.weekEnd = this.weekStart === 0 ? 6 : this.weekStart - 1;
    this.onRender = options.onRender;
    this.fillDow();
    this.fillMonths();
    this.update();
    this.showMode();
  };

  Datepicker.prototype = {
    constructor: Datepicker,

    show: function(e) {
      this.picker.show();
      this.height = this.component ? this.component.outerHeight() : this.element.outerHeight();
      this.place();
      $(window).on('resize', $.proxy(this.place, this));
      if (e ) {
        e.stopPropagation();
        e.preventDefault();
      }
      if (!this.isInput) {
      }
      var that = this;
      $(document).on('mousedown', function(ev){
        if ($(ev.target).closest('.datepicker').length == 0) {
          that.hide();
        }
      });
      this.element.trigger({
        type: 'show',
        date: this.date
      });
    },

    hide: function(){
      this.picker.hide();
      $(window).off('resize', this.place);
      this.viewMode = this.startViewMode;
      this.showMode();
      if (!this.isInput) {
        $(document).off('mousedown', this.hide);
      }
      //this.set();
      this.element.trigger({
        type: 'hide',
        date: this.date
      });
    },

    set: function() {
      var formated = DPGlobal.formatDate(this.date, this.format);
      if (!this.isInput) {
        if (this.component){
          this.element.find('input').prop('value', formated);
        }
        this.element.data('date', formated);
      } else {
        this.element.prop('value', formated);
      }
    },

    setValue: function(newDate) {
      if (typeof newDate === 'string') {
        this.date = DPGlobal.parseDate(newDate, this.format);
      } else {
        this.date = new Date(newDate);
      }
      this.set();
      this.viewDate = new Date(this.date.getFullYear(), this.date.getMonth(), 1, 0, 0, 0, 0);
      this.fill();
    },

    place: function(){
      var offset = this.component ? this.component.offset() : this.element.offset();
      this.picker.css({
        //top: offset.top + this.height,
        top: 'initial',
        bottom: 30,
        left: offset.left - 20,
        height: 255
      });
    },

    update: function(newDate){
      this.date = DPGlobal.parseDate(
        typeof newDate === 'string' ? newDate : (this.isInput ? this.element.prop('value') : this.element.data('date')),
        this.format
      );
      this.viewDate = new Date(this.date.getFullYear(), this.date.getMonth(), 1, 0, 0, 0, 0);
      this.fill();
    },

    fillDow: function(){
      var dowCnt = this.weekStart;
      var html = '<tr>';
      while (dowCnt < this.weekStart + 7) {
        html += '<th class="dow">'+DPGlobal.dates.daysMin[(dowCnt++)%7]+'</th>';
      }
      html += '</tr>';
      this.picker.find('.datepicker-days thead').append(html);
    },

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

    fill: function() {
      var d = new Date(this.viewDate),
        year = d.getFullYear(),
        month = d.getMonth(),
        currentDate = this.date.valueOf();
      this.picker.find('.datepicker-days th:eq(1)')
        .text(DPGlobal.dates.months[month]+' '+year);
      var prevMonth = new Date(year, month-1, 28,0,0,0,0),
        day = DPGlobal.getDaysInMonth(prevMonth.getFullYear(), prevMonth.getMonth());
      prevMonth.setDate(day);
      prevMonth.setDate(day - (prevMonth.getDay() - this.weekStart + 7)%7);
      var nextMonth = new Date(prevMonth);
      nextMonth.setDate(nextMonth.getDate() + 42);
      nextMonth = nextMonth.valueOf();
      var html = [];
      var clsName,
        prevY,
        prevM;
      while(prevMonth.valueOf() < nextMonth) {
        if (prevMonth.getDay() === this.weekStart) {
          html.push('<tr>');
        }
        clsName = this.onRender(prevMonth);
        prevY = prevMonth.getFullYear();
        prevM = prevMonth.getMonth();
        if ((prevM < month &&  prevY === year) ||  prevY < year) {
          clsName += ' old';
        } else if ((prevM > month && prevY === year) || prevY > year) {
          clsName += ' new';
        }
        if (prevMonth.valueOf() === currentDate) {
          clsName += ' active';
        }
        html.push('<td class="day '+clsName+'">'+prevMonth.getDate() + '</td>');
        if (prevMonth.getDay() === this.weekEnd) {
          html.push('</tr>');
        }
        prevMonth.setDate(prevMonth.getDate()+1);
      }
      this.picker.find('.datepicker-days tbody').empty().append(html.join(''));
      var currentYear = this.date.getFullYear();

      var months = this.picker.find('.datepicker-months')
        .find('th:eq(1)')
        .text(year)
        .end()
        .find('span').removeClass('active');
      if (currentYear === year) {
        months.eq(this.date.getMonth()).addClass('active');
      }

      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+'</span>';
        year += 1;
      }
      yearCont.html(html);
    },

    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':
                this.viewDate['set'+DPGlobal.modes[this.viewMode].navFnc].call(
                  this.viewDate,
                  this.viewDate['get'+DPGlobal.modes[this.viewMode].navFnc].call(this.viewDate) +
                  DPGlobal.modes[this.viewMode].navStep * (target[0].className === 'prev' ? -1 : 1)
                );
                this.fill();
                this.set();
                break;
            }
            break;
          case 'span':
            if (target.is('.month')) {
              var month = target.parent().find('span').index(target);
              this.viewDate.setMonth(month);
            } else {
              var year = parseInt(target.text(), 10)||0;
              this.viewDate.setFullYear(year);
            }
            if (this.viewMode !== 0) {
              this.date = new Date(this.viewDate);
              this.element.trigger({
                type: 'changeDate',
                date: this.date,
                viewMode: DPGlobal.modes[this.viewMode].clsName
              });
            }
            this.showMode(-1);
            this.fill();
            this.set();
            break;
          case 'td':
            if (target.is('.day') && !target.is('.disabled')){
              var day = parseInt(target.text(), 10)||1;
              var month = this.viewDate.getMonth();
              if (target.is('.old')) {
                month -= 1;
              } else if (target.is('.new')) {
                month += 1;
              }
              var year = this.viewDate.getFullYear();
              this.date = new Date(year, month, day,0,0,0,0);
              this.viewDate = new Date(year, month, Math.min(28, day),0,0,0,0);
              this.fill();
              this.set();
              this.element.trigger({
                type: 'changeDate',
                date: this.date,
                viewMode: DPGlobal.modes[this.viewMode].clsName
              });
            }
            break;
        }
      }
    },

    mousedown: function(e){
      e.stopPropagation();
      e.preventDefault();
    },

    showMode: function(dir) {
      if (dir) {
        this.viewMode = Math.max(this.minViewMode, Math.min(2, this.viewMode + dir));
      }
      this.picker.find('>div').hide().filter('.datepicker-'+DPGlobal.modes[this.viewMode].clsName).show();
    }
  };

  $.fn.datepicker = function ( option, val ) {
    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') data[option](val);
    });
  };

  $.fn.datepicker.defaults = {
    onRender: function(date) {
      return '';
    }
  };
  $.fn.datepicker.Constructor = Datepicker;

  var DPGlobal = {
    modes: [
      {
        clsName: 'days',
        navFnc: 'Month',
        navStep: 1
      },
      {
        clsName: 'months',
        navFnc: 'FullYear',
        navStep: 1
      },
      {
        clsName: 'years',
        navFnc: 'FullYear',
        navStep: 10
      }],
    dates:{

      //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"]
      days: ["周日", "周一", "周二", "周三", "周四", "周五", "周六", "周日"],
      daysShort: ["日", "一", "二", "三", "四", "五", "六", "日"],
      daysMin: ["日", "一", "二", "三", "四", "五", "六", "日"],
      months: ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"],
      monthsShort: ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"]
    },
    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]
    },
    parseFormat: function(format){
      var separator = format.match(/[.\/\-\s].*?/),
        parts = format.split(/\W+/);
      if (!separator || !parts || parts.length === 0){
        throw new Error("Invalid date format.");
      }
      return {separator: separator, parts: parts};
    },
    parseDate: function(date, format) {
      var parts = date.split(format.separator),
        date = new Date(),
        val;
      date.setHours(0);
      date.setMinutes(0);
      date.setSeconds(0);
      date.setMilliseconds(0);
      if (parts.length === format.parts.length) {
        var year = date.getFullYear(), day = date.getDate(), month = date.getMonth();
        for (var i=0, cnt = format.parts.length; i < cnt; i++) {
          val = parseInt(parts[i], 10)||1;
          switch(format.parts[i]) {
            case 'dd':
            case 'd':
              day = val;
              date.setDate(val);
              break;
            case 'mm':
            case 'm':
              month = val - 1;
              date.setMonth(val - 1);
              break;
            case 'yy':
              year = 2000 + val;
              date.setFullYear(2000 + val);
              break;
            case 'yyyy':
              year = val;
              date.setFullYear(val);
              break;
          }
        }
        date = new Date(year, month, day, 0 ,0 ,0);
      }
      return date;
    },
    formatDate: function(date, format){
      var val = {
        d: date.getDate(),
        m: date.getMonth() + 1,
        yy: date.getFullYear().toString().substring(2),
        yyyy: date.getFullYear()
      };
      val.dd = (val.d < 10 ? '0' : '') + val.d;
      val.mm = (val.m < 10 ? '0' : '') + val.m;
      var date = [];
      for (var i=0, cnt = format.parts.length; i < cnt; i++) {
        date.push(val[format.parts[i]]);
      }
      return date.join(format.separator);
    },
    headTemplate: '<thead>'+
    '<tr>'+
    '<th class="prev">&lsaquo;</th>'+
    '<th colspan="5" class="switch"></th>'+
    '<th class="next">&rsaquo;</th>'+
    '</tr>'+
    '</thead>',
    contTemplate: '<tbody><tr><td colspan="7"></td></tr></tbody>'
  };
  DPGlobal.template = '<div class="datepicker dropdown-menu">'+
    '<div class="datepicker-days">'+
    '<table class=" table-condensed">'+
    DPGlobal.headTemplate+
    '<tbody></tbody>'+
    '</table>'+
    '</div>'+
    '<div class="datepicker-months">'+
    '<table class="table-condensed">'+
    DPGlobal.headTemplate+
    DPGlobal.contTemplate+
    '</table>'+
    '</div>'+
    '<div class="datepicker-years">'+
    '<table class="table-condensed">'+
    DPGlobal.headTemplate+
    DPGlobal.contTemplate+
    '</table>'+
    '</div>'+
    '</div>';

}( window.jQuery );
