package pl.edu.pg.student.eti.mamlab3_155134;


import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;

public class MainActivity extends AppCompatActivity implements LocationListener {

    LocationManager _locationManager;
    Location _currentLocation;
    Location _savedLocation;
    Location _previousLocation;
    TextView _textView;

    @SuppressLint("MissingPermission")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        _textView = findViewById(R.id.text);
        _locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        if (_locationManager != null) {
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                System.out.println();
                return;
            }

            _locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        _currentLocation = location;
    }

    @Override
    public void onStatusChanged(String s, int i, Bundle bundle) {
        System.out.println("Status Changed: " + s);
    }

    @Override
    public void onProviderEnabled(String s) {

    }

    @Override
    public void onProviderDisabled(String s) {

    }

    public void buttonOnClick(View view) {
        if(_savedLocation !=  null)
            _previousLocation = _savedLocation;
        else _previousLocation = _currentLocation;

        _savedLocation = _currentLocation;

        String s = "Current latitude" +
                Double.toString(_currentLocation.getLatitude()) +
                "\nPrevious latitude" +
                Double.toString(_previousLocation.getLatitude()) +
                "\nDiference of latidude" +
                Double.toString(_currentLocation.getLatitude() - _previousLocation.getLatitude())+
                "\nCurrent longitude" +
                Double.toString(_currentLocation.getLongitude()) +
                "\nPrevious longitude" +
                Double.toString(_previousLocation.getLongitude()) +
                "\nDiference of longitude" +
                Double.toString(_currentLocation.getLongitude() - _previousLocation.getLongitude()) +
                "\nCurrent bearing" +
                Double.toString(_currentLocation.getBearing()) +
                "\nPrevious bearing" +
                Double.toString(_previousLocation.getBearing()) +
                "\nDiference of bearing" +
                Double.toString(_currentLocation.getBearing() - _previousLocation.getBearing()) +
                "\nCurrent accuracy" +
                Double.toString(_currentLocation.getAccuracy()) +
                "\nPrevious accuracy" +
                Double.toString(_previousLocation.getAccuracy()) +
                "\nDiference of accuracy" +
                Double.toString(_currentLocation.getAccuracy() - _previousLocation.getAccuracy()) +
                "\nCurrent speed" + _currentLocation.getSpeed();

        writeToFile(s, this);
        _textView.setText(s);
    }

    private void writeToFile(String data, Context context) {
        try {
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(context.openFileOutput("config.txt", Context.MODE_PRIVATE));
            outputStreamWriter.write(data);
            outputStreamWriter.close();
        }
        catch (IOException e) {
            Log.e("Exception", "File write failed: " + e.toString());
        }
    }


}