<?php
/**
 * staff/availability_status.php
 * Gibt den aktuellen Verfügbarkeitsstatus aller aktiven Mitarbeiter als JSON zurück.
 * Wird alle 15 Sekunden vom Frontend abgefragt.
 */
require_once __DIR__ . '/../includes/bootstrap.php';
require_staff_login();
$pdo = get_db();

header('Content-Type: application/json');
header('Cache-Control: no-cache');

try {
    staff_run_auto_offline($pdo);
    $rows = $pdo->query(
        "SELECT s.id, s.name, s.is_on_vacation,
                COALESCE(sa.status, 'offline') AS status,
                sa.note
         FROM staff s
         LEFT JOIN staff_availability sa ON sa.staff_id = s.id
         WHERE s.is_active = 1
         ORDER BY s.name"
    )->fetchAll(PDO::FETCH_ASSOC);

    echo json_encode(array_map(fn($r) => [
        'id'             => (int)$r['id'],
        'status'         => $r['status'],
        'note'           => $r['note'] ?? '',
        'is_on_vacation' => (bool)$r['is_on_vacation'],
    ], $rows));
} catch (Throwable $e) {
    echo json_encode([]);
}