<?php
require_once __DIR__ . '/includes/bootstrap.php';

header('Content-Type: application/json');

$pdo    = get_db();
$number = $_GET['n'] ?? '';
$known  = max(0, (int) ($_GET['count'] ?? 0));

$stmt = $pdo->prepare(
    'SELECT t.id, t.user_id, t.ticket_number FROM tickets t WHERE t.ticket_number = ?'
);
$stmt->execute([$number]);
$ticket = $stmt->fetch();

if (!$ticket) {
    echo json_encode(['new_count' => $known]);
    exit;
}

// Zugriffsprüfung wie in ticket_view.php
$user    = current_user();
$allowed = ($user && $ticket['user_id'] == $user['id'])
        || !empty($_SESSION['guest_ticket_access'][$ticket['ticket_number']]);

if (!$allowed) {
    echo json_encode(['new_count' => $known]);
    exit;
}

$stmt = $pdo->prepare(
    'SELECT COUNT(*) FROM ticket_threads WHERE ticket_id = ? AND is_internal_note = 0'
);
$stmt->execute([$ticket['id']]);
$count = (int) $stmt->fetchColumn();

echo json_encode(['new_count' => $count]);