mMDT5_PR_MSY1_Gruppe1/app/src/main/java/de/edotzlaff/schockwelle/SensorMapsActivity.java

package de.edotzlaff.schockwelle;

import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.FragmentActivity;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

import java.util.Calendar;
import java.util.Date;

public class SensorMapsActivity extends FragmentActivity implements OnMapReadyCallback {


    private static final String TAG = "MainActivity";
    private static final String FINE_LOCATION = Manifest.permission.ACCESS_FINE_LOCATION;
    private static final int LOCATION_PERMISSION_REQUEST_CODE = 1234;

    //vars
    private Boolean mLocationPermissionsGranted = false;
    private GoogleMap mMap;
    private FusedLocationProviderClient mFusedLocationProviderClient;

    Date currentTime;
    Location currentLocation;

    private double breitengrad;
    private double laengengrad;

    private DatabaseReference mDatenbank;

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

        TextView tv= (TextView) findViewById(R.id.txtSensor);

        getLocationPermission(); //Zuerst werden die aktuellen Standortdaten ermittelt

        //getDataBaseValues();     // Hier werden die Daten von der DB abgefragt //TODO Aron: sobald die Methode aufgerufen wird crashed die APP

        //distance(currentLocation.getLatitude(), currentLocation.getLongitude(),breitengrad,laengengrad); //Übergabe zur Berechnung der Distanz zwischen Auslöser und aktuellem Standort

        //TODO Patrick: die Funktion distance gibt Meter zurück, könntest Du das mit dem Zeitstempel und der Berechnung bis zur Vibration machen?
    }

    private void getLocationPermission() {
        String[] permissions = {Manifest.permission.ACCESS_FINE_LOCATION};
        if (ContextCompat.checkSelfPermission(this.getApplicationContext(), FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
            mLocationPermissionsGranted = true;
            initMap();
        } else {
            ActivityCompat.requestPermissions(this, permissions, LOCATION_PERMISSION_REQUEST_CODE);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        mLocationPermissionsGranted = false;

        switch (requestCode) {
            case LOCATION_PERMISSION_REQUEST_CODE: {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    mLocationPermissionsGranted = true;
                    //initalize or map
                    initMap();
                }
            }
        }
    }

    void initMap(){
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {

        Toast.makeText(this, "Map is ready", Toast.LENGTH_SHORT).show();
        mMap = googleMap;

        if (mLocationPermissionsGranted) {
            getDeviceLocation();

            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                    != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this,
                    Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

                return;
            }
            mMap.setMyLocationEnabled(true);
        }

        // Add a marker in Sydney and move the camera
        LatLng sydney = new LatLng(-34, 151);
        mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
        mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
    }

    private void getDeviceLocation(){
        mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
        try {
            if (mLocationPermissionsGranted){
                final Task location = mFusedLocationProviderClient.getLastLocation();

                location.addOnCompleteListener(new OnCompleteListener() {

                    @Override
                    public void onComplete(@NonNull Task task) {
                        if (task.isSuccessful()){
                            currentLocation = (Location) task.getResult();
                            currentTime = Calendar.getInstance().getTime();
                            Toast.makeText(SensorMapsActivity.this, currentTime.toString(), Toast.LENGTH_SHORT).show();
                            moveCamera(new LatLng(currentLocation.getLatitude(), currentLocation.getLongitude()),15f);
                        }
                        else{
                            Toast.makeText(SensorMapsActivity.this, "Current Location unavailable", Toast.LENGTH_SHORT).show();
                        }
                    }
                });
            }
        }catch (SecurityException e){
            Log.e(TAG,"Device Location not found" + e.getMessage());
        }
    }

    private void moveCamera(LatLng latlng, float zoom){
        Log.d(TAG,"Latitude: "+latlng.latitude+"Longitude: "+latlng.longitude);
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latlng, zoom));
    }

    //TODO Edward: Mit Methode getDataBaseValues werden die Werte in der DB abgefragt. In Methode processDataBaseValues werden diese beispielhaft ausgelesen. Kann nach Bedarf angepasst werden.
    public void getDataBaseValues()
    {
        mDatenbank = FirebaseDatabase.getInstance().getReference();
        mDatenbank.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot snapshot) {
                processDataBaseValues(snapshot);                           //Daten - Snapshot, Übergabe an Methode DataChangeProtocol
            }
            @Override
            public void onCancelled(@NonNull DatabaseError error) {
                getDataBaseFailure(error);
            }
        });
    }

    public void processDataBaseValues (DataSnapshot data)
    {
        for (int i = 1; i<=4; i++)  //Für alle IDG 1-4 werden Werte ausgegeben
        {
            //####### Auslesen für String-Werte #######:
            String ipAdresse = data.child("overview").child("IDG" + i).child("ip").getValue().toString();

            //####### Auslesen für boolean-Werte #######:
            String vibrationString = data.child("overview").child("IDG" + i).child("vibration").getValue().toString();
            boolean vibration;
            if(vibrationString == "true"){
                vibration = true;
            }else{
                vibration = false;
            }

            //####### Auslesen für double-Werte #######:
            String breitengradString = data.child("overview").child("IDG" + i).child("breitengrad").getValue().toString();
            String laengengradString = data.child("overview").child("IDG" + i).child("laengengrad").getValue().toString();
            double breitengrad = Double.parseDouble(breitengradString);
            double laengengrad = Double.parseDouble(laengengradString);

            //####### Auslesen für long-Werte #######:
            String timestampString = data.child("overview").child("IDG" + i).child("timestamp").getValue().toString();
            long timestamp = Long.parseLong(timestampString);

            //####### Auslesen für ing-Werte #######:
            String amplitudeString = data.child("overview").child("IDG" + i).child("amplitude").getValue().toString();
            int amplitude = Integer.parseInt(amplitudeString);

            //####### Optional zur Kontrolle #######:
            /*
            System.out.println("IDG" + i + " -          IP:" + data.child("overview").child("IDG" + i).child("ip").getValue().toString());
            System.out.println("IDG" + i + " -   Vibration:" + data.child("overview").child("IDG" + i).child("vibration").getValue().toString());
            System.out.println("IDG" + i + " - Zeitstempel:" + data.child("overview").child("IDG" + i).child("timestamp").getValue().toString());
            System.out.println("IDG" + i + " - Breitengrad:" + data.child("overview").child("IDG" + i).child("breitengrad").getValue().toString());
            System.out.println("IDG" + i + " - Laengengrad:" + data.child("overview").child("IDG" + i).child("laengengrad").getValue().toString());
            System.out.println("IDG" + i + " -   Amplitude:" + data.child("overview").child("IDG" + i).child("amplitude").getValue().toString());
            */
        }
    }

    public void getDataBaseFailure (DatabaseError error)
    {
        System.out.println("Fehler");
        Log.w("Datenbankfehler", error.toException());
    }

    //TODO Edward Dauer für Timer berechnen bis Smartphone vibriert

    private float distance(double currentlatitude, double currentlongitude, double originLat, double originLon) {

        float[] results = new float[1];
        Location.distanceBetween(currentlatitude, currentlongitude, originLat, originLon, results);
        float distanceInMeters = results[0];

        return distanceInMeters;
    }

}