<?php
/* Copyright (C) 2026		Eduard Wisch				<data@data-it-solution.de>
 *
 * AJAX: Add product to supplier order (Direktbestellung)
 * Creates or uses existing draft order per supplier
 */

if (!defined('NOTOKENRENEWAL')) {
	define('NOTOKENRENEWAL', '1');
}
if (!defined('NOREQUIREMENU')) {
	define('NOREQUIREMENU', '1');
}
if (!defined('NOREQUIREHTML')) {
	define('NOREQUIREHTML', '1');
}
if (!defined('NOREQUIREAJAX')) {
	define('NOREQUIREAJAX', '1');
}

// Load Dolibarr environment
$res = 0;
if (!$res && file_exists("../../main.inc.php")) {
	$res = @include "../../main.inc.php";
}
if (!$res && file_exists("../../../main.inc.php")) {
	$res = @include "../../../main.inc.php";
}
if (!$res && file_exists("../../../../main.inc.php")) {
	$res = @include "../../../../main.inc.php";
}
if (!$res) {
	die(json_encode(['success' => false, 'error' => 'Failed to load Dolibarr']));
}

require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.commande.class.php';
require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.product.class.php';
require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
require_once DOL_DOCUMENT_ROOT.'/societe/class/societe.class.php';

header('Content-Type: application/json; charset=utf-8');

// Security check
if (!$user->hasRight('fournisseur', 'commande', 'creer') && !$user->hasRight('supplier_order', 'creer')) {
	echo json_encode(['success' => false, 'error' => 'Access denied']);
	exit;
}

// Get parameters
$productId = GETPOSTINT('product_id');
$supplierId = GETPOSTINT('supplier_id');
$qty = GETPOSTINT('qty');
$price = GETPOSTFLOAT('price');

if (empty($productId) || empty($supplierId) || empty($qty)) {
	echo json_encode(['success' => false, 'error' => 'Missing parameters']);
	exit;
}

// Load supplier
$supplier = new Societe($db);
if ($supplier->fetch($supplierId) <= 0) {
	echo json_encode(['success' => false, 'error' => 'Supplier not found']);
	exit;
}

// Load product
$product = new Product($db);
if ($product->fetch($productId) <= 0) {
	echo json_encode(['success' => false, 'error' => 'Product not found']);
	exit;
}

// Build ref_supplier (Lieferanten-Best.-Nr.): "Direkt" ohne Datum für dauerhafte Direktbestellung
$refSupplier = 'Direkt';

// Search for existing draft order for this supplier with ref_supplier = "Direkt"
$sql = "SELECT rowid FROM ".MAIN_DB_PREFIX."commande_fournisseur";
$sql .= " WHERE fk_soc = ".((int) $supplierId);
$sql .= " AND fk_statut = 0"; // Draft status
$sql .= " AND ref_supplier = '".$db->escape($refSupplier)."'";
$sql .= " AND entity IN (".getEntity('supplier_order').")";
$sql .= " ORDER BY rowid DESC LIMIT 1";

$resql = $db->query($sql);
$existingOrderId = 0;

if ($resql && $db->num_rows($resql) > 0) {
	$obj = $db->fetch_object($resql);
	$existingOrderId = $obj->rowid;
}

$order = new CommandeFournisseur($db);

if ($existingOrderId > 0) {
	// Use existing draft order
	$order->fetch($existingOrderId);
} else {
	// Create new order - ref is auto-generated by Dolibarr, ref_supplier is our custom reference
	$order->socid = $supplierId;
	$order->ref_supplier = $refSupplier; // Lieferanten-Best.-Nr.: "Direkt" (dauerhafte Direktbestellung)
	$order->cond_reglement_id = $supplier->cond_reglement_supplier_id ?: getDolGlobalInt('FOURN_COND_REGLEMENT_ID_DEFAULT', 1);
	$order->mode_reglement_id = $supplier->mode_reglement_supplier_id ?: getDolGlobalInt('FOURN_MODE_REGLEMENT_ID_DEFAULT', 1);
	$order->date = dol_now();
	$order->date_livraison = dol_now() + (7 * 24 * 60 * 60); // +7 days default

	$result = $order->create($user);

	if ($result < 0) {
		echo json_encode(['success' => false, 'error' => 'Failed to create order: ' . $order->error]);
		exit;
	}
}

// Get supplier price info
$productFourn = new ProductFournisseur($db);
$supplierPrices = $productFourn->list_product_fournisseur_price($productId, '', '', 0, 0, $supplierId);

$supplierRef = '';
$unitPrice = $price;
$tva_tx = 19; // Default VAT

if (!empty($supplierPrices)) {
	foreach ($supplierPrices as $sp) {
		if ($sp->fourn_id == $supplierId) {
			$supplierRef = $sp->ref_fourn;
			if ($unitPrice <= 0) {
				$unitPrice = $sp->fourn_price;
			}
			$tva_tx = $sp->tva_tx;
			break;
		}
	}
}

// Check if product already in order
$existingLine = null;
foreach ($order->lines as $line) {
	if ($line->fk_product == $productId) {
		$existingLine = $line;
		break;
	}
}

if ($existingLine) {
	// Update quantity
	$newQty = $existingLine->qty + $qty;
	$result = $order->updateline(
		$existingLine->id,
		$existingLine->desc,
		$unitPrice,
		$newQty,
		$existingLine->remise_percent,
		$tva_tx,
		0, // localtax1
		0, // localtax2
		'HT',
		0,
		0,
		GETPOST('product_type', 'int') ?: 0,
		false,
		null,
		null,
		0,
		$supplierRef
	);
} else {
	// Add new line
	$result = $order->addline(
		$product->description ?: $product->label,
		$unitPrice,
		$qty,
		$tva_tx,
		0, // localtax1
		0, // localtax2
		$productId,
		0, // fourn_price_id
		$supplierRef,
		0, // remise_percent
		'HT',
		0, // pu_devise
		$product->type,
		0, // rang
		0, // special_code
		null, // array_options
		null, // fk_unit
		0, // origin
		0 // origin_id
	);
}

if ($result < 0) {
	echo json_encode(['success' => false, 'error' => 'Failed to add line: ' . $order->error]);
	exit;
}

// Count items in order
$order->fetch($order->id);
$totalItems = count($order->lines);
$totalQty = 0;
foreach ($order->lines as $line) {
	$totalQty += $line->qty;
}

echo json_encode([
	'success' => true,
	'order_id' => $order->id,
	'order_ref' => $order->ref,
	'total_items' => $totalItems,
	'total_qty' => $totalQty,
	'message' => 'Product added to ' . $order->ref
]);