<?php
include('include/headscript.php');
header('Content-Type: application/json');

$idsupplier = isset($_POST['idsupplier']) ? (int)$_POST['idsupplier'] : 0;
$supplier_name = trim($_POST['supplier_name'] ?? '');
$vat = trim($_POST['vat'] ?? '');

if ($idsupplier <= 0 || $supplier_name === '') {
    echo json_encode(['success' => false, 'message' => 'Invalid input']);
    exit;
}

$db = DBHandlerSelect::getInstance();
$pdo = $db->getConnection();

$stmt = $pdo->prepare("UPDATE suppliers SET supplier_name = ?, vat = ? WHERE idsupplier = ?");
$ok = $stmt->execute([$supplier_name, $vat !== '' ? $vat : null, $idsupplier]);

echo json_encode(['success' => (bool)$ok]);