<?php
/**
 *----------------------------------------------------------------------------
 * iC Library   Library by JoomliC, for Joomla!
 *----------------------------------------------------------------------------
 * @version     2.0.0 2021-09-27
 *
 * @package     iC Library
 * @subpackage  Globalize
 * @link        https://www.joomlic.com
 *
 * @author      Cyril Reze
 * @copyright   (c) 2013-2026 Cyril Reze / JoomliC. All rights reserved.
 * @license     GNU General Public License version 3 or later; see LICENSE.txt
 *
 * @since       1.3.2
 *----------------------------------------------------------------------------
 * Based on Original Jalali to Gregorian (and vice versa) convertor:
 * Primary developed by Roozbeh Pournader and Mohammad Toossi
 * https://github.com/roozbeh360/Gregorian-Jalali-Date-Convertor
 *----------------------------------------------------------------------------
*/

namespace iClib\Globalize;

\defined('_JEXEC') or die;

/**
 * class iCGlobalizeConvert
 */
class Convert
{
	/**
	 * Function to process division
	 */
	public static function div($a, $b)
	{
		return (int) ($a / $b);
	}


	/**
	 * Gregorian to Jalali Conversion
	 * Copyright (C) 2000  Roozbeh Pournader and Mohammad Toossi
	 */
	public static function gregorianToJalali($g_y, $g_m, $g_d, $str)
	{
		$g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
		$j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);

		$gy = $g_y-1600;
		$gm = $g_m-1;
		$gd = $g_d-1;

		$g_day_no = 365*$gy+self::div($gy+3,4)-self::div($gy+99,100)+self::div($gy+399,400);

		for ($i=0; $i < $gm; ++$i)
			$g_day_no += $g_days_in_month[$i];
		if ($gm>1 && (($gy%4==0 && $gy%100!=0) || ($gy%400==0)))
		/* leap and after Feb */
		$g_day_no++;
		$g_day_no += $gd;

		$j_day_no = $g_day_no-79;

		$j_np = self::div($j_day_no, 12053); /* 12053 = 365*33 + 32/4 */
		$j_day_no = $j_day_no % 12053;

		$jy = 979+33*$j_np+4*self::div($j_day_no,1461); /* 1461 = 365*4 + 4/4 */

		$j_day_no %= 1461;

		if ($j_day_no >= 366)
		{
			$jy += self::div($j_day_no-1, 365);
			$j_day_no = ($j_day_no-1)%365;
		}

		for ($i = 0; $i < 11 && $j_day_no >= $j_days_in_month[$i]; ++$i)
			$j_day_no -= $j_days_in_month[$i];
		$jm = $i+1;
		$jd = $j_day_no+1;

		if ($str)
		{
			return $jy . '-' . $jm . '-' . $jd;
		}

		return array($jy, $jm, $jd);
	}

	/**
	 * Jalali to Gregorian Conversion
	 * Copyright (C) 2000  Roozbeh Pournader and Mohammad Toossi
	 */
	public static function jalaliToGregorian($j_y, $j_m, $j_d, $str)
	{
		$g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
		$j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);

		$jy = (int)($j_y)-979;
		$jm = (int)($j_m)-1;
		$jd = (int)($j_d)-1;

		$j_day_no = 365*$jy + self::div($jy, 33)*8 + self::div($jy%33+3, 4);

		for ($i=0; $i < $jm; ++$i)
			$j_day_no += $j_days_in_month[$i];

		$j_day_no += $jd;

		$g_day_no = $j_day_no+79;

		$gy = 1600 + 400*self::div($g_day_no, 146097); /* 146097 = 365*400 + 400/4 - 400/100 + 400/400 */
		$g_day_no = $g_day_no % 146097;

		$leap = true;

		if ($g_day_no >= 36525) /* 36525 = 365*100 + 100/4 */
		{
			$g_day_no--;
			$gy += 100*self::div($g_day_no,  36524); /* 36524 = 365*100 + 100/4 - 100/100 */
			$g_day_no = $g_day_no % 36524;

			if ($g_day_no >= 365)
				$g_day_no++;
			else
				$leap = false;
		}

		$gy += 4*self::div($g_day_no, 1461); /* 1461 = 365*4 + 4/4 */
		$g_day_no %= 1461;

		if ($g_day_no >= 366)
		{
			$leap = false;

			$g_day_no--;
			$gy += self::div($g_day_no, 365);
			$g_day_no = $g_day_no % 365;
		}

		for ($i = 0; $g_day_no >= $g_days_in_month[$i] + ($i == 1 && $leap); $i++)
			$g_day_no -= $g_days_in_month[$i] + ($i == 1 && $leap);
		$gm = $i+1;
		$gd = $g_day_no+1;

		if ($str)
		{
			return $gy . '-' . $gm . '-' . $gd;
		}

		return array($gy, $gm, $gd);
	}


	public static function comparedate($_date_mix_jalaly, $_date_mix_gregorian)
	{
		$_date_arr_jalaly = explode('/', $_date_mix_jalaly);
		$_date_arr_gregorian = explode('/', $_date_mix_gregorian);

		$arr_jtg = self::jalali_to_gregorian($_date_arr_jalaly[0],$_date_arr_jalaly[1],$_date_arr_jalaly[2]);

		if ($_date_arr_gregorian[0]> $arr_jtg[0])
		{
			return false;
		}
		elseif ($_date_arr_gregorian[0]== $arr_jtg[0] && $_date_arr_gregorian[1]>$arr_jtg[1])
		{
			return false;
		}
		elseif ($_date_arr_gregorian[0]== $arr_jtg[0] && $_date_arr_gregorian[1]==$arr_jtg[1] && $_date_arr_gregorian[2]>$arr_jtg[2])
		{
			return false;
		}

		return true ;
	}
}