<?php
declare(strict_types=1);

use App\App;
use App\CalendarSync;

$app = App::get();

if (!isset($_SESSION['user_id'])) {
    http_response_code(403);
    header('Content-Type: text/plain; charset=utf-8');
    echo 'Login erforderlich.';
    return;
}

$calendarSync = new CalendarSync($app);
$calendarSync->ensureSchema();

$userId = (int)$_SESSION['user_id'];
$ics = $calendarSync->renderUserCalendarIcs($userId, 'Papa-Kind-Treff Events');

header('Content-Type: text/calendar; charset=utf-8');
header('Content-Disposition: attachment; filename="papa-kind-treff-events.ics"');
header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');

echo $ics;