Siro/siro_rider/lib/controller/transit/transit_controller.dart

// transit_controller.dart — تحكم شاشات مواصلاتي (جهة الراكب)
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:get/get.dart';
import '../home/map/map_socket_controller.dart';
import '../../print.dart';
import 'transit_models.dart';
import 'transit_service.dart';

class TransitController extends GetxController {
  bool isLoadingEnrollments = false;
  List<TransitEnrollment> myEnrollments = [];

  bool isLoadingOrgs = false;
  List<TransitOrg> browsableOrgs = [];

  bool isLoadingRoutes = false;
  List<TransitRouteSummary> currentOrgRoutes = [];
  int? currentOrgId;

  // ── تتبع الباص الحي ──────────────────────────────────────────
  int? liveRouteId;
  int? liveTripId;
  Map<String, dynamic>? liveTripData;
  BusPosition? liveBusPosition;
  String liveError = '';
  bool isLoadingLiveTrip = false;

  @override
  void onInit() {
    super.onInit();
    fetchMyEnrollments();
  }

  Future<void> fetchMyEnrollments() async {
    isLoadingEnrollments = true;
    update();
    final res = await TransitService.getMyEnrollments();
    if (res.success) myEnrollments = res.data ?? [];
    isLoadingEnrollments = false;
    update();
  }

  Future<void> browseOrgs({String? search}) async {
    isLoadingOrgs = true;
    update();
    final res = await TransitService.browseOrgs(search: search);
    if (res.success) browsableOrgs = res.data ?? [];
    isLoadingOrgs = false;
    update();
  }

  Future<bool> activateEnrollment(int orgId, String studentId) async {
    final res = await TransitService.activateEnrollment(
      orgId: orgId,
      studentId: studentId,
    );
    if (res.success) {
      await fetchMyEnrollments();
      // اشترك في topic المؤسسة لاستقبال إشعارات الانطلاق والتأخير
      try {
        await FirebaseMessaging.instance.subscribeToTopic('transit_org_$orgId');
        Log.print('Subscribed to transit_org_$orgId ✅');
      } catch (_) {}
      return true;
    }
    Get.snackbar('مواصلاتي', res.message);
    return false;
  }

  // اشتراك/إلغاء اشتراك في topic الخط المحدد
  Future<void> subscribeToRouteTopic(int routeId) async {
    try {
      await FirebaseMessaging.instance.subscribeToTopic('transit_route_$routeId');
      Log.print('Subscribed to transit_route_$routeId ✅');
    } catch (_) {}
  }

  Future<void> unsubscribeFromRouteTopic(int routeId) async {
    try {
      await FirebaseMessaging.instance.unsubscribeFromTopic('transit_route_$routeId');
    } catch (_) {}
  }

  Future<void> openOrgRoutes(int orgId) async {
    currentOrgId = orgId;
    isLoadingRoutes = true;
    currentOrgRoutes = [];
    update();

    final res = await TransitService.getRoutesForOrg(orgId);
    if (res.success) {
      currentOrgRoutes = res.data ?? [];
    } else {
      Get.snackbar('مواصلاتي', res.message);
    }
    isLoadingRoutes = false;
    update();
  }

  // ── الخط الحي: تحميل أولي + اشتراك سوكيت ────────────────────
  Future<void> openLiveRoute(int routeId) async {
    liveRouteId = routeId;
    liveTripData = null;
    liveBusPosition = null;
    liveError = '';
    isLoadingLiveTrip = true;
    update();

    final res = await TransitService.getLiveTrip(routeId: routeId);
    if (res.success && res.data != null) {
      liveTripData = res.data;
      liveTripId = int.tryParse(liveTripData?['trip']?['id']?.toString() ?? '');
      final pos = liveTripData?['bus_position'];
      if (pos is Map) liveBusPosition = BusPosition.fromJson(pos);
    } else {
      liveError = res.message;
    }
    isLoadingLiveTrip = false;
    update();

    if (Get.isRegistered<MapSocketController>()) {
      final ms = Get.find<MapSocketController>();
      ms.onBusLocationUpdate = _handleLiveBusUpdate;
      ms.onTransitError = _handleTransitError;
      ms.subscribeToTransitRoute(routeId);
    }
  }

  void _handleLiveBusUpdate(Map<String, dynamic> data) {
    final incomingRouteId = int.tryParse(data['route_id']?.toString() ?? '');
    if (incomingRouteId == null || incomingRouteId != liveRouteId) return;

    liveBusPosition = BusPosition(
      lat: double.tryParse(data['latitude']?.toString() ?? '0') ?? 0,
      lng: double.tryParse(data['longitude']?.toString() ?? '0') ?? 0,
      heading: double.tryParse(data['heading']?.toString() ?? '0') ?? 0,
      speed: double.tryParse(data['speed']?.toString() ?? '0') ?? 0,
      currentStopSeq: data['current_stop_seq'] == null
          ? null
          : int.tryParse(data['current_stop_seq'].toString()),
    );
    Log.print('🚌 Live bus update: ${liveBusPosition?.lat}, ${liveBusPosition?.lng}');
    update();
  }

  void _handleTransitError(String errorCode) {
    if (errorCode == 'NOT_ENROLLED') {
      liveError = 'غير مشترك في هذا الخط. فعّل عضويتك أولاً.';
    } else if (errorCode == 'ROUTE_NOT_FOUND') {
      liveError = 'الخط غير متاح حالياً.';
    } else {
      liveError = 'خطأ في الاتصال بالخط: $errorCode';
    }
    update();
  }

  void closeLiveRoute() {
    if (liveRouteId != null && Get.isRegistered<MapSocketController>()) {
      final ms = Get.find<MapSocketController>();
      ms.unsubscribeFromTransitRoute(liveRouteId!);
      ms.onBusLocationUpdate = null;
      ms.onTransitError = null;
    }
    liveRouteId = null;
    liveTripId = null;
    liveTripData = null;
    liveBusPosition = null;
  }

  @override
  void onClose() {
    closeLiveRoute();
    super.onClose();
  }
}