/**
 * Persian translation & Convert to Jalali Calendar for bootstrap-datepicker
 * Rahman Mousavian	<mousavian.rahman@gmail.com>
 *  Using jQuery Datepicker (Jalali Calendar) By:
 * 	Mahdi Hasheminezhad. email: hasheminezhad at gmail dot com (http://hasheminezhad.com)
 */
;

function mod(a, b) {return a - (b * Math.floor(a / b));}
/*
       JavaScript functions for the Fourmilab Calendar Converter

                  by John Walker  --  September, MIM
              http://www.fourmilab.ch/documents/calendar/

                This program is in the public domain.
*/
function leap_gregorian(year)
{
    return ((year % 4) == 0) &&
            (!(((year % 100) == 0) && ((year % 400) != 0)));
}
var GREGORIAN_EPOCH = 1721425.5;
function gregorian_to_jd(year, month, day)
{
    return (GREGORIAN_EPOCH - 1) +
           (365 * (year - 1)) +
           Math.floor((year - 1) / 4) +
           (-Math.floor((year - 1) / 100)) +
           Math.floor((year - 1) / 400) +
           Math.floor((((367 * month) - 362) / 12) +
           ((month <= 2) ? 0 :
                               (leap_gregorian(year) ? -1 : -2)
           ) +
           day);
}
function jd_to_gregorian(jd) {
    var wjd, depoch, quadricent, dqc, cent, dcent, quad, dquad,
        yindex, dyindex, year, yearday, leapadj;

    wjd = Math.floor(jd - 0.5) + 0.5;
    depoch = wjd - GREGORIAN_EPOCH;
    quadricent = Math.floor(depoch / 146097);
    dqc = mod(depoch, 146097);
    cent = Math.floor(dqc / 36524);
    dcent = mod(dqc, 36524);
    quad = Math.floor(dcent / 1461);
    dquad = mod(dcent, 1461);
    yindex = Math.floor(dquad / 365);
    year = (quadricent * 400) + (cent * 100) + (quad * 4) + yindex;
    if (!((cent == 4) || (yindex == 4))) {
        year++;
    }
    yearday = wjd - gregorian_to_jd(year, 1, 1);
    leapadj = ((wjd < gregorian_to_jd(year, 3, 1)) ? 0
                                                  :
                  (leap_gregorian(year) ? 1 : 2)
              );
    month = Math.floor((((yearday + leapadj) * 12) + 373) / 367);
    day = (wjd - gregorian_to_jd(year, month, 1)) + 1;

    return [year, month, day];
}

function leap_islamic(year)
{
    return (((year * 11) + 14) % 30) < 11;
}
var ISLAMIC_EPOCH = 1948439.5;
function islamic_to_jd(year, month, day)
{
    return (day +
            Math.ceil(29.5 * (month - 1)) +
            (year - 1) * 354 +
            Math.floor((3 + (11 * year)) / 30) +
            ISLAMIC_EPOCH) - 1;
}
function jd_to_islamic(jd)
{
    var year, month, day;

    jd = Math.floor(jd) + 0.5;
    year = Math.floor(((30 * (jd - ISLAMIC_EPOCH)) + 10646) / 10631);
    month = Math.min(12,
                Math.ceil((jd - (29 + islamic_to_jd(year, 1, 1))) / 29.5) + 1);
    day = (jd - islamic_to_jd(year, month, 1)) + 1;
    return [year, month, day];
}

function leap_persian(year)
{
    return ((((((year - ((year > 0) ? 474 : 473)) % 2820) + 474) + 38) * 682) % 2816) < 682;
}
var PERSIAN_EPOCH = 1948320.5;
function persian_to_jd(year, month, day)
{
    var epbase, epyear;

    epbase = year - ((year >= 0) ? 474 : 473);
    epyear = 474 + mod(epbase, 2820);

    return day +
            ((month <= 7) ?
                ((month - 1) * 31) :
                (((month - 1) * 30) + 6)
            ) +
            Math.floor(((epyear * 682) - 110) / 2816) +
            (epyear - 1) * 365 +
            Math.floor(epbase / 2820) * 1029983 +
            (PERSIAN_EPOCH - 1);
}
function jd_to_persian(jd)
{
    var year, month, day, depoch, cycle, cyear, ycycle,
        aux1, aux2, yday;


    jd = Math.floor(jd) + 0.5;

    depoch = jd - persian_to_jd(475, 1, 1);
    cycle = Math.floor(depoch / 1029983);
    cyear = mod(depoch, 1029983);
    if (cyear == 1029982) {
        ycycle = 2820;
    } else {
        aux1 = Math.floor(cyear / 366);
        aux2 = mod(cyear, 366);
        ycycle = Math.floor(((2134 * aux1) + (2816 * aux2) + 2815) / 1028522) +
                    aux1 + 1;
    }
    year = ycycle + (2820 * cycle) + 474;
    if (year <= 0) {
        year--;
    }
    yday = (jd - persian_to_jd(year, 1, 1)) + 1;
    month = (yday <= 186) ? Math.ceil(yday / 31) : Math.ceil((yday - 6) / 30);
    day = (jd - persian_to_jd(year, month, 1)) + 1;
    return [year, month, day];
}

function JalaliDate(p0, p1, p2) {
    var gregorianDate;
    var jalaliDate;

	if (!isNaN(parseInt(p0)) && !isNaN(parseInt(p1)) && !isNaN(parseInt(p2))) {
        var g = jalali_to_gregorian([parseInt(p0, 10), parseInt(p1, 10), parseInt(p2, 10)]);
		setFullDate(new Date(g[0], g[1], g[2]));
    } else {
        setFullDate(p0);
    }

    function jalali_to_gregorian(d) {
		var adjustDay = 0;
		if(d[1]<0){
			adjustDay = leap_persian(d[0]-1)? 30: 29;
			d[1]++;
		}
        var gregorian = jd_to_gregorian(persian_to_jd(d[0], d[1] + 1, d[2])-adjustDay);
        gregorian[1]--;
        return gregorian;
    }

    function gregorian_to_jalali(d) {
        var jalali = jd_to_persian(gregorian_to_jd(d[0], d[1] + 1, d[2]));
        jalali[1]--;
        return jalali;
    }

    function setFullDate(date) {
        if (date && date.getGregorianDate) date = date.getGregorianDate();
        gregorianDate = new Date(date);
		gregorianDate.setHours(gregorianDate.getHours() > 12 ? gregorianDate.getHours() + 2 : 0);
        if (!gregorianDate || gregorianDate == 'Invalid Date' || isNaN(gregorianDate || !gregorianDate.getDate())) {
            gregorianDate = new Date();
        }
        jalaliDate = gregorian_to_jalali([
            gregorianDate.getFullYear(),
            gregorianDate.getMonth(),
            gregorianDate.getDate()]);
        return this;
    }

    this.getGregorianDate = function() { return gregorianDate; };

    this.setFullDate = setFullDate;

	this.setMonth = function(e) {
		jalaliDate[1] = e;
        var g = jalali_to_gregorian(jalaliDate);
        gregorianDate = new Date(g[0], g[1], g[2]);
        jalaliDate = gregorian_to_jalali([g[0], g[1], g[2]]);
	};

    this.setDate = function(e) {
        jalaliDate[2] = e;
        var g = jalali_to_gregorian(jalaliDate);
        gregorianDate = new Date(g[0], g[1], g[2]);
        jalaliDate = gregorian_to_jalali([g[0], g[1], g[2]]);
    };

    this.getFullYear = function() { return jalaliDate[0]; };
    this.getMonth = function() { return jalaliDate[1]; };
    this.getDate = function() { return jalaliDate[2]; };
    this.toString = function() { return jalaliDate.join(',').toString(); };
    this.getDay = function() { return gregorianDate.getDay(); };
    this.getHours = function() { return gregorianDate.getHours(); };
    this.getMinutes = function() { return gregorianDate.getMinutes(); };
    this.getSeconds = function() { return gregorianDate.getSeconds(); };
    this.getTime = function() { return gregorianDate.getTime(); };
    this.getTimeZoneOffset = function() { return gregorianDate.getTimeZoneOffset(); };
    this.getYear = function() { return jalaliDate[0] % 100; };

    this.setHours = function(e) { gregorianDate.setHours(e) };
    this.setMinutes = function(e) { gregorianDate.setMinutes(e) };
    this.setSeconds = function(e) { gregorianDate.setSeconds(e) };
    this.setMilliseconds = function(e) { gregorianDate.setMilliseconds(e) };
}




jQuery(function($){
	$.datepicker.regional['fa'] = {
		calendar: JalaliDate,
		closeText: 'بستن',
		prevText: 'قبل',
		nextText: 'بعد',
		currentText: 'امروز',
		monthNames: ['حمل','ثور','جوزا','سرطان','اسد','سنبله','میزان','عقرب','قوس','جدی','دلو','حوت'],
		monthNamesShort: ['حمل','ثور','جوزا','سرطان','اسد','سنبله','میزان','عقرب','قوس','جدی','دلو','حوت'],
    dayNames: ['یکشنبه', 'دوشنبه', 'سه شنبه', 'چهارشنبه', 'پنجشنبه', 'جمعه', 'شنبه'],
		dayNamesShort: ['یک', 'دو', 'سه', 'چهار', 'پنج', 'جمعه', 'شنبه'],
		dayNamesMin: ['ی','د','س','چ','پ','ج','ش'],
		weekHeader: 'ه',
		dateFormat: 'dd/mm/yy',
		firstDay: 6,
		isRTL: true,
		showMonthAfterYear: false,
		yearSuffix: '',
		calculateWeek: function(date) {
			var checkDate = new JalaliDate(date.getFullYear(), date.getMonth(), date.getDate() + (date.getDay() || 7) - 3);
			return Math.floor(Math.round((checkDate.getTime() - new JalaliDate(checkDate.getFullYear(), 0, 1).getTime()) / 86400000) / 7) + 1;
		}};
        $.datepicker.setDefaults($.datepicker.regional['fa']);
});

