<?php
declare(strict_types=1);
require_once __DIR__ . '/common.php';

api_require_method('GET');
$staff = api_require_staff();
$pdo = get_db();

/** Echter Stand für den Zähler: Ticket-IDs, die jetzt Aufmerksamkeit brauchen (nicht zugewiesen / mir gehörend), plus Anzahlen. */
function api_attention(PDO $pdo, array $staff): array
{
    $a = staff_attention_tickets($pdo, $staff);
    return ['unassigned' => $a['unassigned'], 'mine' => $a['mine'], 'unassignedCount' => count($a['unassigned']), 'mineCount' => count($a['mine'])];
}

$since = trim($_GET['since'] ?? '');
if ($since === '') {
    // Erster Aufruf nach Login: nur die Serverzeit als Referenzpunkt liefern, noch nichts zählen
    // (verhindert Uhrzeit-Abweichungen zwischen Client und Server bei der Baseline).
    api_json(['newReplies' => 0, 'newUnassigned' => 0, 'attention' => api_attention($pdo, $staff), 'serverTime' => db_now(), 'health' => has_permission($staff, 'manage_email_addresses') ? system_health($pdo) : []]);
}
if (strtotime($since) === false) {
    api_error(422, 'INVALID_SINCE', 'Der since-Zeitstempel ist ungültig.');
}
$sinceSql = date('Y-m-d H:i:s', strtotime($since));

$stmt = $pdo->prepare(
    "SELECT COUNT(*) FROM tickets
     WHERE assigned_staff_id = ? AND updated_at > ? AND status NOT IN ('resolved','closed')"
);
$stmt->execute([$staff['id'], $sinceSql]);
$newReplies = (int) $stmt->fetchColumn();

$departmentIds = staff_department_ids($staff);
[$deptFilter, $deptParams] = dept_filter_sql($departmentIds, 'department_id');
$stmt = $pdo->prepare(
    "SELECT COUNT(*) FROM tickets
     WHERE assigned_staff_id IS NULL AND created_at > ?{$deptFilter}"
);
$stmt->execute([$sinceSql, ...$deptParams]);
$newUnassigned = (int) $stmt->fetchColumn();

api_json([
    'newReplies' => $newReplies,
    'newUnassigned' => $newUnassigned,
    'attention' => api_attention($pdo, $staff),
    'serverTime' => db_now(),
    'health' => has_permission($staff, 'manage_email_addresses') ? system_health($pdo) : [],
]);