// A map that allows the user to select a location for a new trip.
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:widget_to_marker/widget_to_marker.dart';

import 'package:anyway/constants.dart';

import 'package:anyway/structs/trip.dart';
import 'package:anyway/structs/landmark.dart';
import 'package:anyway/modules/landmark_map_marker.dart';


class NewTripMap extends StatefulWidget {
  Trip trip;
  NewTripMap(
    this.trip,
  );

  @override
  State<NewTripMap> createState() => _NewTripMapState();
}

class _NewTripMapState extends State<NewTripMap> {
  final CameraPosition _cameraPosition = const CameraPosition(
    target: LatLng(48.8566, 2.3522),
    zoom: 11.0,
  );
  GoogleMapController? _mapController;
  final Set<Marker> _markers = <Marker>{};

  _onLongPress(LatLng location) {
    widget.trip.landmarks.clear();
    widget.trip.addLandmark(
      Landmark(
        uuid: 'pending',
        name: 'start',
        location: [location.latitude, location.longitude],
        type: typeStart
      )
    );
  }

  updateTripDetails() async {
    _markers.clear();
    if (widget.trip.landmarks.isNotEmpty) {
      Landmark landmark = widget.trip.landmarks.first;
      _markers.add(
        Marker(
          markerId: MarkerId(landmark.uuid),
          position: LatLng(landmark.location[0], landmark.location[1]),
          icon: await ThemedMarker(landmark: landmark, position: 0).toBitmapDescriptor(
            logicalSize: const Size(150, 150),
            imageSize: const Size(150, 150)
          ),
        )
      );
      // check if the controller is ready

      if (_mapController != null) {
        _mapController!.animateCamera(
          CameraUpdate.newLatLng(
            LatLng(landmark.location[0], landmark.location[1])
          )
        );
      }
      setState(() {});
    }
  }

  void _onMapCreated(GoogleMapController controller) async {
    _mapController = controller;
  }


  @override
  Widget build(BuildContext context) {
    widget.trip.addListener(updateTripDetails);
    Future<SharedPreferences> preferences = SharedPreferences.getInstance();


    return FutureBuilder(
      future: preferences,
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          SharedPreferences prefs = snapshot.data as SharedPreferences;
          bool useLocation = prefs.getBool('useLocation') ?? true;
          return _buildMap(useLocation);
        } else {
          return const CircularProgressIndicator();
        }
      }
    );
  }

  Widget _buildMap(bool useLocation) {
    return GoogleMap(
      onMapCreated: _onMapCreated,
      initialCameraPosition: _cameraPosition,
      onLongPress: _onLongPress,
      markers: _markers,
      cloudMapId: MAP_ID,
      mapToolbarEnabled: false,
      zoomControlsEnabled: false,
      myLocationButtonEnabled: false,
      myLocationEnabled: useLocation,
    );
  }
}