/* =========================================================

* 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,
                        left: offset.left
                });
        },

        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"]
        },
        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 );