<?php
/* Copyright (C) 2011 		Auguria 				<anthony.poiret@auguria.net>
 * Copyright (C) 2024-2026	MDW						<mdeweerd@users.noreply.github.com>
 * Copyright (C) 2024-2026  Frédéric France         <frederic.france@free.fr>
 * Copyright (C) 2026       Lenin Rivas         	<frederic.france@free.fr>
 *
 * 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 3 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, see <https://www.gnu.org/licenses/>.
 */

/**
 *       \file       htdocs/compta/ajaxpayment.php
 *       \brief      File to return Ajax response on payment breakdown process
 */

if (!defined('NOREQUIRESOC')) {
	define('NOREQUIRESOC', '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
}

// Load Dolibarr environment
require '../main.inc.php';

/**
 * @var Conf $conf
 * @var DoliDB $db
 * @var HookManager $hookmanager
 * @var Translate $langs
 * @var User $user
 */

$langs->load('compta');

// No permission check. This is just a formatting data service.


/*
 * View
 */

//init var
$invoice_type = GETPOSTINT('invoice_type');
$amountPayment = GETPOST('amountPayment');
$amounts = GETPOST('amounts', 'array'); // from text inputs : invoice amount payment (check required)
$remains = GETPOST('remains'); // from dolibarr's object (no need to check)
$currentInvId = GETPOST('imgClicked'); // from DOM elements : imgId (equals invoice id)

// Getting the posted keys=>values, sanitize the ones who are from text inputs
$amountPayment = $amountPayment != '' ? (is_numeric(price2num($amountPayment)) ? price2num($amountPayment) : '') : ''; // keep void if not a valid entry

// Multicurrency LRR
$multicurrency = GETPOSTINT('multicurrency');
$multicurrencyAmountPayment = GETPOST('multicurrency_amountPayment');
$multicurrencyAmounts = GETPOST('multicurrency_amounts', 'array'); // from text inputs : invoice amount payment (check required)
$multicurrencyRemains = GETPOST('multicurrency_remains'); // from dolibarr's object (no need to check)

// Getting the posted keys=>values, sanitize the ones who are from text inputs
$multicurrencyAmountPayment = $multicurrencyAmountPayment != '' ? (is_numeric(price2num($multicurrencyAmountPayment)) ? price2num($multicurrencyAmountPayment) : '') : ''; // keep void if not a valid entry

if ($multicurrency) {
	// Clean checkamounts multicurrency
	if (is_array($multicurrencyAmounts)) {
		foreach ($multicurrencyAmounts as $key => $value) {
			$value = price2num($value);
			$multicurrencyAmounts[$key] = $value;
			if (empty($value)) {
				unset($multicurrencyAmounts[$key]);
			}
		}
	}
	// Clean remains multicurrency
	if (is_array($multicurrencyRemains)) {
		foreach ($multicurrencyRemains as $key => $value) {
			$value = price2num($value);
			$multicurrencyRemains[$key] = ($invoice_type == 2 ? -1 : 1) * (float) $value;
			if (empty($value)) {
				unset($multicurrencyRemains[$key]);
			}
		}
	} elseif ($multicurrencyRemains) {
		$multicurrencyRemains = array(price2num($multicurrencyRemains));
	} else {
		$multicurrencyRemains = array();
	}

	// Treatment
	$result = ($multicurrencyAmountPayment != '') ? ((float) $multicurrencyAmountPayment - array_sum($multicurrencyAmounts)) : array_sum($multicurrencyAmounts); // Remaining amountPayment
	$toJsonArray = array();
	$totalRemaining = price2num(array_sum($multicurrencyRemains));
	$toJsonArray['label'] = $multicurrencyAmountPayment == '' ? '' : $langs->transnoentities('RemainingAmountPayment');
	if ($currentInvId) {																	// Here to breakdown
		// Get the current amount (from form) and the corresponding remainToPay (from invoice)
		$currentAmount = $multicurrencyAmounts['amount_'.$currentInvId];
		$currentRemain = $multicurrencyRemains['remain_'.$currentInvId];

		// If amountPayment isn't filled, breakdown invoice amount, else breakdown from amountPayment
		if ($multicurrencyAmountPayment == '') {
			// Check if current amount exists in amounts
			$amountExists = array_key_exists('amount_'.$currentInvId, $multicurrencyAmounts);
			if ($amountExists) {
				$remainAmount = $currentRemain - $currentAmount; // To keep value between curRemain and curAmount
				$result += $remainAmount; // result must be deduced by
				$currentAmount += $remainAmount; // curAmount put to curRemain
			} else {
				$currentAmount = $currentRemain;
				$result += $currentRemain;
			}
		} else {
			// Reset the subtraction 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 subtraction has been replaced by breakdown
			}	// else there's no need to calc anything, just reset the field (result is still < 0)
		}
		$toJsonArray['multicurrency_amount_'.$currentInvId] = price2num($currentAmount); // Param will exist only if an img has been clicked
	}

	$toJsonArray['multicurrency_makeRed'] = ($totalRemaining < price2num($result) || price2num($result) < 0);
	$toJsonArray['multicurrency_result'] = price($result); // Return value to user format
	$toJsonArray['multicurrency_resultnum'] = price2num($result); // Return value to numeric format
} else {
	// Clean checkamounts
	if (is_array($amounts)) {
		foreach ($amounts as $key => $value) {
			$value = price2num($value);
			$amounts[$key] = $value;
			if (empty($value)) {
				unset($amounts[$key]);
			}
		}
	}
	// Clean remains
	if (is_array($remains)) {
		foreach ($remains as $key => $value) {
			$value = price2num($value);
			$remains[$key] = ($invoice_type == 2 ? -1 : 1) * (float) $value;
			if (empty($value)) {
				unset($remains[$key]);
			}
		}
	} elseif ($remains) {
		$remains = array(price2num($remains));
	} else {
		$remains = array();
	}

	// Treatment
	$result = ($amountPayment != '') ? ((float) $amountPayment - array_sum($amounts)) : array_sum($amounts); // Remaining amountPayment
	$toJsonArray = array();
	$totalRemaining = price2num(array_sum($remains));
	$toJsonArray['label'] = $amountPayment == '' ? '' : $langs->transnoentities('RemainingAmountPayment');
	if ($currentInvId) {																	// Here to breakdown
		// Get the current amount (from form) and the corresponding remainToPay (from invoice)
		$currentAmount = $amounts['amount_'.$currentInvId];
		$currentRemain = $remains['remain_'.$currentInvId];

		// If amountPayment isn't filled, breakdown invoice amount, else breakdown from amountPayment
		if ($amountPayment == '') {
			// Check if current amount exists in amounts
			$amountExists = array_key_exists('amount_'.$currentInvId, $amounts);
			if ($amountExists) {
				$remainAmount = $currentRemain - $currentAmount; // To keep value between curRemain and curAmount
				$result += $remainAmount; // result must be deduced by
				$currentAmount += $remainAmount; // curAmount put to curRemain
			} else {
				$currentAmount = $currentRemain;
				$result += $currentRemain;
			}
		} else {
			// Reset the subtraction 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 subtraction 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
	}

	$toJsonArray['makeRed'] = ($totalRemaining < price2num($result) || price2num($result) < 0);
	$toJsonArray['result'] = price($result); // Return value to user format
	$toJsonArray['resultnum'] = price2num($result); // Return value to numeric format
}

// Encode to JSON to return
echo json_encode($toJsonArray); // Printing the call's result
