<?php
/* Copyright (C) 2011 Auguria <anthony.poiret@auguria.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/**
 *       \file       htdocs/compta/ajaxpayment.php
 *       \brief      File to return Ajax response on payment breakdown process
 *       \version    ajaxpayment.php,v 1.0
 */

//if (! defined('NOREQUIREUSER'))  define('NOREQUIREUSER','1');
//if (! defined('NOREQUIREDB'))    define('NOREQUIREDB','1');
if (! defined('NOREQUIRESOC'))   define('NOREQUIRESOC','1');
//if (! defined('NOREQUIRETRAN'))  define('NOREQUIRETRAN','1');
if (! defined('NOCSRFCHECK'))    define('NOCSRFCHECK','1');
if (! defined('NOTOKENRENEWAL')) define('NOTOKENRENEWAL','1');
if (! defined('NOREQUIREMENU'))  define('NOREQUIREMENU','1'); // If there is no menu to show
if (! defined('NOREQUIREHTML'))  define('NOREQUIREHTML','1'); // If we don't need to load the html.form.class.php
//if (! defined('NOREQUIREAJAX'))  define('NOREQUIREAJAX','1');
//if (! defined("NOLOGIN"))        define("NOLOGIN",'1');       // If this page is public (can be called outside logged session)

require('../main.inc.php');

//print_r($_POST);

// Getting the posted keys=>values, sanitize the ones who are from text inputs
// from text inputs : total amount
$amountPayment = price2num($_POST['amountPayment']);
$amountPayment = is_numeric($amountPayment)? $amountPayment : 0;					// is a value
// from text inputs : invoice amount payment
$amounts = $_POST['amounts'];														// is an array (need a foreach)
foreach ($amounts as $key => $value)
{
	$value = price2num($value);
	if (!is_numeric($value)) unset($amounts[$key]);
}
// from dolibarr's object (no need to check)
$remains = $_POST['remains'];
// from DOM elements : imgId (equals invoice id)
$currentInvId = $_POST['imgClicked'];


// Treatment
$result = $amountPayment - array_sum($amounts);										// Remaining amountPayment
$toJsonArray = 	array();
if($currentInvId)																	// Here to breakdown
{
	// Get the current amount (from form) and the corresponding remainToPay (from invoice)
	$currentAmount = $amounts['amount_'.$currentInvId];
	$currentRemain = $remains['remain_'.$currentInvId];

	// Reset the substraction for this amount
	$result += price2num($currentAmount);
	$currentAmount = 0;
	if($result >= 0)			// then we need to calculate the amount to breakdown
	{
		$amountToBreakdown = ($result - $currentRemain >= 0 ?
									$currentRemain : 								// Remain can be fully paid
									$currentRemain + ($result - $currentRemain));	// Remain can only partially be paid
		$currentAmount = $amountToBreakdown;						// In both cases, amount will take breakdown value
		$result -= $amountToBreakdown;								// And canceled substraction has been replaced by breakdown
	}	// else there's no need to calc anything, just reset the field (result is still < 0)
	$toJsonArray['amount_'.$currentInvId] = price2num($currentAmount)."";			// Param will exist only if an img has been clicked
}
// Encode to JSON to return
$toJsonArray['result'] = price2num($result)."";
echo json_encode($toJsonArray);										// Printing the call's result

?>