import 'dart:async';
import 'dart:math';
import 'package:get/get.dart';
import 'package:trackoffical_app/logger.dart';
import 'package:trackoffical_app/model.dart';
import 'package:trackoffical_app/service/app.dart';
import 'package:trackoffical_app/service/game/compass_updater.dart';
import 'package:trackoffical_app/service/game/map_status.dart';
import 'package:sensors_plus/sensors_plus.dart';
import 'package:vector_math/vector_math.dart';
import 'game_model.dart';
import 'plug.dart';
import 'package:sensor/sensor.dart';
import 'package:simple_kalman/simple_kalman.dart';


class PlugOrientation extends Plug {
  PlugOrientation({required this.mapStatus});

  StreamSubscription<Orientation>? compassListener;
  StreamSubscription<AccelerometerEvent>? accelerometer;

  final GameModel _model = Get.find();
  final MapStatus mapStatus;

  final _angleFusedUpdater = CompassUpdater();
  final _angleSrcUpdater = CompassUpdater();

  var _lastAccelerometer = AccelerometerEvent(0, 0, 0);
  var _lastAccelerometerTime = DateTime.now();

  @override
  Future<void> init() async {
    _model.isMoving =false;
    compassListener = Sensor.orientationStream.listen((event) {
      _model.orientation.value = event;
      var direction = event.z;
      if (_model.isUseRealNorth) {
        direction += _model.compassRealNorthOffset;
      }

      final src = _angleSrcUpdater.updateRadians(direction);
      if(src!=null){
        _model.compassRadiansSrc.value = -src;
      }

      // GPS 方向
      final gpsD = gpsDirection();
      _model.isMoving = gpsD != null;
      if (gpsD != null) {
        direction = gpsD;
      }

      final fused = _angleFusedUpdater.updateRadians(direction);
      if(fused!=null){
        _model.compassRadiansFused.value = -fused;
      }

    });


    accelerometer = accelerometerEvents.listen((AccelerometerEvent event) {
      final now = DateTime.now();
      if(now.difference(_lastAccelerometerTime) >= 1.seconds){
        var sum = (event.x - _lastAccelerometer.x).abs() +
            (event.y - _lastAccelerometer.y).abs() +
            (event.z - _lastAccelerometer.z).abs();



        final d = now.difference(_lastAccelerometerTime);

        _model.deviceSpeed = sum / (d.inMilliseconds.toDouble() / 1000);

        _lastAccelerometerTime = now;
        _lastAccelerometer = event;
      }
    });
  }




  /// GPS 方向
  double? gpsDirection() {
    if(_model.deviceSpeed < 1){
      return null;
    }

    final locations = <MPosition>[];
    var disKm = 0.0;
    final t = 4.seconds;
    final bt = App.to.now.add(-t);

    for (var i = _model.myPositionHistoryTmp.length - 1; i >= 0; i--) {
      final one = _model.myPositionHistoryTmp[i];
      if (one.timestamp.isBefore(bt)) {
        break;
      }
      locations.add(one);
    }
    if (locations.length > 1) {
      for (var i = 0; i < locations.length; i++) {
        if (i > 0) {
          final p1 = locations[i];
          final p2 = locations[i - 1];
          disKm += p1.distance(p2).km;
        }
      }

      final d = locations.last.timestamp.difference(locations[0].timestamp);

      final speedMPerS =
          disKm * 1000 / (d.inMilliseconds.toDouble().abs() / 1000);
      _model.speedMPreS.value = speedMPerS;
      if (speedMPerS > 1.1) {
        // ---- 均值 -----
        // var dSum = 0.0;
        // var count = 0;
        // for(var i=locations.length-1; i >=0 && i >= locations.length-3; i--){
        //   final l1 = locations[i];
        //   final l2 = locations[i-1];
        //   dSum += l1.directionTo(l2);
        //   count++;
        // }
        //
        // return dSum/count;
        // ---------------

        final l1 = locations[locations.length-1];
        var i = locations.length-4;
        if(i< 0){
          i=0;
        }
        final l2 = locations[i];
        return l1.directionTo(l2);

      }
    }

    return null;
  }

  @override
  Future<void> close() async {
    super.close();
    compassListener?.cancel();
    accelerometer?.cancel();
  }
}