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

import android.Manifest;
import android.content.pm.PackageManager;
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.design.widget.FloatingActionButton;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import com.mapbox.mapboxsdk.camera.CameraPosition;
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.testapp.R;

public class MyLocationToggleActivity extends AppCompatActivity {

    private MapView mapView;
    private MapboxMap mapboxMap;
    private FloatingActionButton locationToggleFab;

    private static final int PERMISSIONS_LOCATION = 0;

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

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

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

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

        locationToggleFab = (FloatingActionButton) findViewById(R.id.fabLocationToggle);
        locationToggleFab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mapboxMap != null) {
                    toggleGps(!mapboxMap.isMyLocationEnabled());
                }
            }
        });
    }

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

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

    @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 false;
        }
    }

    @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.setOnMyLocationChangeListener(new MapboxMap.OnMyLocationChangeListener() {
                @Override
                public void onMyLocationChange(@Nullable Location location) {
                    if (location != null) {
                        mapboxMap.setCameraPosition(new CameraPosition.Builder()
                                .target(new LatLng(location))
                                .zoom(16)
                                .bearing(0)
                                .tilt(0)
                                .build());
                        mapboxMap.setOnMyLocationChangeListener(null);
                    }
                }
            });
            locationToggleFab.setImageResource(R.drawable.ic_location_disabled_24dp);
        } else {
            locationToggleFab.setImageResource(R.drawable.ic_my_location_24dp);
        }

        mapboxMap.setMyLocationEnabled(enabled);
    }

    @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);
            }
        }
    }

}