<?php
// transit/route/update.php — تعديل خط قائم (اسم/اتجاه/مسار/محطات)
// POST: route_id, name_ar, [name_en, direction, polyline, distance_km, duration_min], stops (JSON)
//
// أي تعديل على خط كان active أو suspended يُعيده إلى draft — يتطلب اعتماداً
// جديداً من فريق سيرو (نفس مسار Admin/transit/route/approve.php)

require_once __DIR__ . '/../../transit/connect_admin.php';

$routeId = filterRequest('route_id', 'int');
if (!$routeId) jsonError('route_id is required', 400);

$nameAr = filterRequest('name_ar');
if (!$nameAr) jsonError('name_ar is required', 400);

$direction = filterRequest('direction') ?: 'outbound';
if (!in_array($direction, ['outbound','inbound','circular'])) $direction = 'outbound';

$stops = json_decode(filterRequest('stops') ?? '[]', true) ?: [];

$chk = $transit_con->prepare("SELECT id, status FROM transit_routes WHERE id=? AND org_id=? LIMIT 1");
$chk->execute([$routeId, $transit_org_id]);
$route = $chk->fetch();
if (!$route) jsonError('Route not found or access denied', 404);

// إن كان معتمداً أو موقوفاً، التعديل يعيده لمسودة بانتظار اعتماد جديد
$newStatus = in_array($route['status'], ['active', 'suspended']) ? 'draft' : $route['status'];

$transit_con->beginTransaction();
try {
    $transit_con->prepare(
        "UPDATE transit_routes
         SET name_ar=?, name_en=?, direction=?, polyline=?, distance_km=?, duration_min=?,
             status=?, approved_by=NULL, approved_at=NULL, updated_at=NOW()
         WHERE id=?"
    )->execute([
        $nameAr,
        filterRequest('name_en'),
        $direction,
        filterRequest('polyline'),
        filterRequest('distance_km', 'float'),
        filterRequest('duration_min', 'int'),
        $newStatus,
        $routeId,
    ]);

    // استبدال كامل لمحطات الخط
    $transit_con->prepare("DELETE FROM transit_stops WHERE route_id=?")->execute([$routeId]);

    $insertStop = $transit_con->prepare(
        "INSERT INTO transit_stops
         (route_id,org_id,sequence,name_ar,name_en,latitude,longitude,geofence_radius,eta_offset_min,is_major)
         VALUES (?,?,?,?,?,?,?,?,?,?)"
    );
    foreach ($stops as $i => $s) {
        if (empty($s['lat']) || empty($s['lng']) || empty($s['name_ar'])) continue;
        $insertStop->execute([
            $routeId, $transit_org_id, $i + 1,
            $s['name_ar'], $s['name_en'] ?? null,
            (float)$s['lat'], (float)$s['lng'],
            (int)($s['radius'] ?? 150),
            isset($s['eta_offset_min']) ? (int)$s['eta_offset_min'] : null,
            (int)($s['is_major'] ?? 0),
        ]);
    }

    $transit_con->commit();
} catch (Throwable $e) {
    $transit_con->rollBack();
    appLog('[TRANSIT][ROUTE][update] ' . $e->getMessage(), 'ERROR');
    jsonError('Failed to update route', 500);
}

appLog("[TRANSIT][ROUTE][update] route #{$routeId} org#{$transit_org_id} updated, status={$newStatus}");

jsonSuccess([
    'route_id'   => $routeId,
    'status'     => $newStatus,
    'stops_count'=> count($stops),
], $newStatus === 'draft' ? 'Route updated — pending re-approval' : 'Route updated');