import 'package:flutter/material.dart';
import 'package:google_navigation_flutter/google_navigation_flutter.dart';
import '../models/delivery.dart';

class DeliveryMap extends StatefulWidget {
  final List<Delivery> deliveries;
  final Delivery? selectedDelivery;
  final ValueChanged<Delivery?>? onDeliverySelected;

  const DeliveryMap({
    super.key,
    required this.deliveries,
    this.selectedDelivery,
    this.onDeliverySelected,
  });

  @override
  State<DeliveryMap> createState() => _DeliveryMapState();
}

class _DeliveryMapState extends State<DeliveryMap> {
  GoogleNavigationViewController? _navigationController;
  bool _isNavigating = false;
  LatLng? _destinationLocation;

  @override
  void initState() {
    super.initState();
    _initializeNavigation();
  }

  Future<void> _initializeNavigation() async {
    try {
      debugPrint('🗺️ Starting navigation initialization');
      // Check if terms and conditions need to be shown
      final termsAccepted = await GoogleMapsNavigator.areTermsAccepted();
      debugPrint('🗺️ Terms accepted: $termsAccepted');

      if (!termsAccepted) {
        debugPrint('🗺️ Showing terms and conditions dialog');
        // Show terms and conditions
        await GoogleMapsNavigator.showTermsAndConditionsDialog(
          'Plan B Logistics',
          'com.goutezplanb.planbLogistic',
        );
      }

      // Initialize navigation session
      debugPrint('🗺️ Initializing navigation session');
      await GoogleMapsNavigator.initializeNavigationSession();
      debugPrint('🗺️ Navigation session initialized successfully');
    } catch (e) {
      debugPrint('❌ Error initializing navigation: $e');
    }
  }

  @override
  void didUpdateWidget(DeliveryMap oldWidget) {
    super.didUpdateWidget(oldWidget);
    if (oldWidget.selectedDelivery != widget.selectedDelivery) {
      _updateDestination();
    }
  }

  void _updateDestination() {
    if (widget.selectedDelivery != null) {
      final address = widget.selectedDelivery!.deliveryAddress;
      if (address?.latitude != null && address?.longitude != null) {
        setState(() {
          _destinationLocation = LatLng(
            latitude: address!.latitude!,
            longitude: address.longitude!,
          );
        });
        _navigateToLocation(_destinationLocation!);
      }
    }
  }

  Future<void> _navigateToLocation(LatLng location) async {
    if (_navigationController == null) return;

    try {
      await _navigationController!.animateCamera(
        CameraUpdate.newLatLngZoom(location, 15),
      );
    } catch (e) {
      debugPrint('Error moving camera: $e');
    }
  }

  Future<void> _startNavigation() async {
    if (_destinationLocation == null) return;

    try {
      final waypoint = NavigationWaypoint.withLatLngTarget(
        title: widget.selectedDelivery?.name ?? 'Destination',
        target: _destinationLocation!,
      );

      final destinations = Destinations(
        waypoints: [waypoint],
        displayOptions: NavigationDisplayOptions(showDestinationMarkers: true),
      );

      await GoogleMapsNavigator.setDestinations(destinations);
      await GoogleMapsNavigator.startGuidance();

      setState(() {
        _isNavigating = true;
      });
    } catch (e) {
      debugPrint('Error starting navigation: $e');
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Error starting navigation: $e')),
        );
      }
    }
  }

  Future<void> _stopNavigation() async {
    try {
      await GoogleMapsNavigator.stopGuidance();
      await GoogleMapsNavigator.clearDestinations();

      setState(() {
        _isNavigating = false;
      });
    } catch (e) {
      debugPrint('Error stopping navigation: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    final initialPosition = widget.selectedDelivery?.deliveryAddress != null &&
            widget.selectedDelivery!.deliveryAddress!.latitude != null &&
            widget.selectedDelivery!.deliveryAddress!.longitude != null
        ? LatLng(
            latitude: widget.selectedDelivery!.deliveryAddress!.latitude!,
            longitude: widget.selectedDelivery!.deliveryAddress!.longitude!,
          )
        : const LatLng(latitude: 45.5017, longitude: -73.5673); // Default to Montreal

    return Stack(
      children: [
        GoogleMapsNavigationView(
          onViewCreated: (controller) {
            debugPrint('🗺️ Map view created successfully');
            _navigationController = controller;
            controller.setMyLocationEnabled(true);

            // Set initial camera position
            controller.animateCamera(
              CameraUpdate.newLatLngZoom(initialPosition, 12),
            );
            debugPrint('🗺️ Initial camera position set to: $initialPosition');
          },
          initialNavigationUIEnabledPreference: NavigationUIEnabledPreference.disabled,
          initialCameraPosition: CameraPosition(
            target: initialPosition,
            zoom: 12,
          ),
        ),
        if (_destinationLocation != null && !_isNavigating)
          Positioned(
            bottom: 24,
            left: 24,
            right: 24,
            child: ElevatedButton.icon(
              onPressed: _startNavigation,
              icon: const Icon(Icons.navigation),
              label: const Text('Start Navigation'),
              style: ElevatedButton.styleFrom(
                padding: const EdgeInsets.all(16),
                backgroundColor: Theme.of(context).colorScheme.primary,
                foregroundColor: Theme.of(context).colorScheme.onPrimary,
              ),
            ),
          ),
        if (_isNavigating)
          Positioned(
            bottom: 24,
            left: 24,
            right: 24,
            child: ElevatedButton.icon(
              onPressed: _stopNavigation,
              icon: const Icon(Icons.stop),
              label: const Text('Stop Navigation'),
              style: ElevatedButton.styleFrom(
                padding: const EdgeInsets.all(16),
                backgroundColor: Theme.of(context).colorScheme.error,
                foregroundColor: Theme.of(context).colorScheme.onError,
              ),
            ),
          ),
        Positioned(
          top: 16,
          right: 16,
          child: Column(
            children: [
              FloatingActionButton.small(
                heroTag: 'zoom_in',
                onPressed: () {
                  _navigationController?.animateCamera(CameraUpdate.zoomIn());
                },
                child: const Icon(Icons.add),
              ),
              const SizedBox(height: 8),
              FloatingActionButton.small(
                heroTag: 'zoom_out',
                onPressed: () {
                  _navigationController?.animateCamera(CameraUpdate.zoomOut());
                },
                child: const Icon(Icons.remove),
              ),
            ],
          ),
        ),
      ],
    );
  }

  @override
  void dispose() {
    GoogleMapsNavigator.cleanup();
    super.dispose();
  }
}