<?php
// Direkter Web-Zugriff (Browser/URL) wird geblockt. Ausnahmen: echter CLI-Cronjob
// sowie Einbindung per require_once aus dem authentifizierten Backend (staff/settings.php),
// das vor dem require_once die Konstante DESKHUB_CRON_RUNNER definiert.
if (php_sapi_name() !== 'cli' && !defined('DESKHUB_CRON_RUNNER')) { http_response_code(403); exit('Kein Web-Zugriff.'); }
/**
 * DeskHub – Cron: Wiederkehrende Tickets erstellen
 * Aufruf: php cron/process_recurring.php
 * Empfehlung: täglich einmal, z.B. um 06:00 Uhr
 *   0 6 * * * /usr/bin/php /pfad/zu/deskhub/cron/process_recurring.php >> /pfad/zu/deskhub/cron/recurring.log 2>&1
 *
 * Kann außerdem manuell aus dem Backend (Einstellungen → Cron-Jobs) ausgeführt werden.
 */

define('CRON_CONTEXT', true);
require_once __DIR__ . '/../includes/bootstrap.php';

/**
 * Erstellt fällige wiederkehrende Tickets. Kann vom Cron und manuell aus settings.php aufgerufen werden.
 *
 * @return array{created: int, log: string[]}
 */
function run_process_recurring(PDO $pdo, bool $verbose = false): array
{
    $today = date('Y-m-d');
    $log = [];

    $stmt = $pdo->query(
        "SELECT rt.*, d.email AS dept_email
         FROM recurring_tickets rt
         JOIN departments d ON d.id = rt.department_id
         WHERE rt.is_active = 1 AND rt.next_run <= '{$today}'"
    );
    $due = $stmt->fetchAll();

    if (!$due) {
        $log[] = date('[Y-m-d H:i:s]') . ' Keine fälligen wiederkehrenden Tickets.';
        return ['created' => 0, 'log' => $log];
    }

    $created = 0;

    foreach ($due as $rt) {
        $tn = generate_ticket_number();
        $now = db_now();
        $nextRun = (new DateTimeImmutable($rt['next_run']))
            ->modify('+' . (int) $rt['interval_days'] . ' days')
            ->format('Y-m-d');

        try {
            $pdo->beginTransaction();
            $pdo->prepare(
                'INSERT INTO tickets (ticket_number,subject,requester_name,requester_email,department_id,priority_id,assigned_staff_id,status,source,created_at,updated_at)
                 VALUES (?,?,?,?,?,?,?,\'open\',\'staff\',?,?)'
            )->execute([
                $tn,
                $rt['subject'],
                'System (Wiederkehrend)',
                'system@recurring',
                $rt['department_id'],
                $rt['priority_id'],
                $rt['assigned_staff_id'],
                $now, $now
            ]);
            $ticketId = (int) $pdo->lastInsertId();

            $pdo->prepare(
                'INSERT INTO ticket_threads (ticket_id,author_type,staff_id,message,is_internal_note,created_at) VALUES (?,\'staff\',?,?,0,?)'
            )->execute([$ticketId, $rt['created_by'], $rt['message'], $now]);
            $pdo->prepare('UPDATE recurring_tickets SET next_run = ? WHERE id = ?')
                ->execute([$nextRun, $rt['id']]);
            $pdo->commit();
        } catch (Throwable $e) {
            if ($pdo->inTransaction()) {
                $pdo->rollBack();
            }
            $log[] = date('[Y-m-d H:i:s]') . " Fehler bei Muster \"{$rt['subject']}\": " . $e->getMessage();
            continue;
        }

        set_setting('cron_process_recurring_last_run', $now);
        $created++;
        if ($verbose) {
            $log[] = date('[Y-m-d H:i:s]') . " Ticket #{$tn} erstellt für Muster: {$rt['subject']}";
        }
    }

    $log[] = date('[Y-m-d H:i:s]') . " Fertig. {$created} Ticket(s) erstellt.";

    return ['created' => $created, 'log' => $log];
}

if (php_sapi_name() === 'cli') {
    $result = run_process_recurring(get_db(), true);
    foreach ($result['log'] as $line) {
        echo $line . "\n";
    }
}