package com.mapbox.mapboxsdk.testapp.activity.navigation;

import android.Manifest;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.UiThread;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.res.ResourcesCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;


import com.mapbox.mapboxsdk.camera.CameraPosition;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.constants.MyBearingTracking;
import com.mapbox.mapboxsdk.constants.MyLocationTracking;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.TrackingSettings;
import com.mapbox.mapboxsdk.maps.widgets.MyLocationViewSettings;
import com.mapbox.mapboxsdk.testapp.R;

public class CarDrivingActivity extends AppCompatActivity implements MapboxMap.OnMyLocationChangeListener {

  private static final int PERMISSIONS_LOCATION = 0;

  private MapView mapView;
  private MapboxMap mapboxMap;
  private Location location;

  @Override
  protected void onCreate(final Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_car_driving);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    final ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
      actionBar.setDisplayHomeAsUpEnabled(true);
      actionBar.setDisplayShowHomeEnabled(true);
    }

    mapView = (MapView) findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(new OnMapReadyCallback() {
      @Override
      public void onMapReady(@NonNull MapboxMap mapboxMap) {
        CarDrivingActivity.this.mapboxMap = mapboxMap;

        // view settings
        MyLocationViewSettings settings = mapboxMap.getMyLocationViewSettings();
        settings.setPadding(0, getWindow().getDecorView().getMeasuredHeight() / 3, 0, 0);

        // get car
        Drawable car = ResourcesCompat.getDrawable(getResources(), R.drawable.ic_taxi_top_small, getTheme());
        settings.setForegroundTintColor(Color.TRANSPARENT);
        settings.setForegroundDrawable(car, car);

        // remove accuracy circle
        settings.setAccuracyAlpha(0);

        // disable dismissal when a gesture occurs
        TrackingSettings trackingSettings = mapboxMap.getTrackingSettings();
        trackingSettings.setDismissLocationTrackingOnGesture(false);
        trackingSettings.setDismissBearingTrackingOnGesture(false);

        mapboxMap.setOnMyLocationChangeListener(CarDrivingActivity.this);

        if (savedInstanceState == null) {
          toggleGps(true);
        }
      }
    });
  }

  @UiThread
  public void toggleGps(boolean enableGps) {
    if (enableGps) {
      if ((ContextCompat.checkSelfPermission(this,
        Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        || (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
        != PackageManager.PERMISSION_GRANTED)) {
        ActivityCompat.requestPermissions(this, new String[] {
          Manifest.permission.ACCESS_COARSE_LOCATION,
          Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSIONS_LOCATION);
      } else {
        enableLocation(true);
      }
    } else {
      enableLocation(false);
    }
  }

  private void enableLocation(boolean enabled) {
    if (enabled) {
      mapboxMap.setMyLocationEnabled(true);
      Location location = mapboxMap.getMyLocation();
      if (location != null) {
        setInitialPosition(new LatLng(location));
      }
    } else {
      mapboxMap.setMyLocationEnabled(false);
    }
  }

  @Override
  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == PERMISSIONS_LOCATION) {
      if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        enableLocation(true);
      }
    }
  }

  private void setInitialPosition(LatLng latLng) {
    mapboxMap.moveCamera(CameraUpdateFactory.newCameraPosition(
      new CameraPosition.Builder().target(latLng).zoom(15).tilt(20f).build()));
    mapboxMap.setMyLocationEnabled(true);

    TrackingSettings trackingSettings = mapboxMap.getTrackingSettings();
    trackingSettings.setMyLocationTrackingMode(MyLocationTracking.TRACKING_FOLLOW);
    trackingSettings.setMyBearingTrackingMode(MyBearingTracking.GPS);
  }

  @Override
  public void onMyLocationChange(@Nullable Location location) {
    if (location != null) {
      if (this.location == null) {
        // initial location to reposition map
        setInitialPosition(new LatLng(location));
      }
      this.location = location;
    }
  }

  @Override
  protected void onStart() {
    super.onStart();
    mapView.onStart();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mapView.onResume();
  }

  @Override
  protected void onPause() {
    super.onPause();
    mapView.onPause();
  }

  @Override
  protected void onStop() {
    super.onStop();
    mapView.onStop();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    mapView.onSaveInstanceState(outState);
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
  }

  @Override
  public void onLowMemory() {
    super.onLowMemory();
    mapView.onLowMemory();
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case android.R.id.home:
        onBackPressed();
        return true;
      default:
        return super.onOptionsItemSelected(item);
    }
  }

}