import android.Manifest;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Looper;
import android.provider.Settings;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;

public class MainActivity extends AppCompatActivity {
    // File
    private boolean isFileSave = false;
    public static File myFile;
    private String fileName;
    private Date currentDate;

    public final Context context = this;

    // Button UI
    private Button btnSave;
    private Button btnEndSave;
    private Button btnSensorsActivity;
    private Button btnInactivity;
    private Button btnHorizontalWalk;
    private Button btnStairs;
    private Button btnEscalator;
    private Button btnElevator;
    private Button btnMoovingWalkway;

    // Behavior
    public static int behavior = 0;
    private final int selectedBehaviorColor = 0xFF00d7b3;
    private final int unSelectedBehaviorColor = 0xFF343A40;

    // Instance
    private static MainActivity instance;

    // GPS
    FusedLocationProviderClient mFusedLocationClient;
    int PERMISSION_ID = 44;

    public static MainActivity getInstance() {
        return instance;
    }

    @SuppressLint("MissingPermission")
    public void getLastLocation() {
        // check if permissions are given
        if (checkPermissions()) {

            // check if location is enabled
            if (isLocationEnabled()) {

                // getting last
                // location from
                // FusedLocationClient
                // object
                mFusedLocationClient.getLastLocation().addOnCompleteListener(new OnCompleteListener<Location>() {
                    @Override
                    public void onComplete(@NonNull Task<Location> task) {
                        Location location = task.getResult();
                        if (location == null) {
                            requestNewLocationData();
                        } else {
                            /*latitudeTextView.setText(location.getLatitude() + "");
                            longitTextView.setText(location.getLongitude() + "");*/
                            requestNewLocationData();
                        }
                    }
                });
            } else {
                Toast.makeText(this, "Please turn on" + " your location...", Toast.LENGTH_LONG).show();
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(intent);
            }
        } else {
            // if permissions aren't available,
            // request for permissions
            requestPermissions();
        }
    }

    @SuppressLint("MissingPermission")
    private void requestNewLocationData() {
        // Initializing LocationRequest
        // object with appropriate methods
        LocationRequest mLocationRequest = new LocationRequest();
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        mLocationRequest.setInterval(5000);
        mLocationRequest.setFastestInterval(5000/2);

        // setting LocationRequest
        // on FusedLocationClient
        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
        mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.myLooper());
    }

    private LocationCallback mLocationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult locationResult) {
            Location mLastLocation = locationResult.getLastLocation();
            /*latitudeTextView.setText("Latitude: " + mLastLocation.getLatitude() + "");
            longitTextView.setText("Longitude: " + mLastLocation.getLongitude() + "");*/
            SensorsListener.latitude = mLastLocation.getLatitude();
            SensorsListener.longitude = mLastLocation.getLongitude();
        }
    };

    // method to check for permissions
    private boolean checkPermissions() {
        return ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED;

        // If we want background location
        // on Android 10.0 and higher,
        // use:
        // ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_BACKGROUND_LOCATION) == PackageManager.PERMISSION_GRANTED
    }

    // method to request for permissions
    private void requestPermissions() {
        ActivityCompat.requestPermissions(this, new String[]{
                Manifest.permission.ACCESS_COARSE_LOCATION,
                Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSION_ID);
    }

    // method to check
    // if location is enabled
    private boolean isLocationEnabled() {
        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
    }

    // If everything is alright then
    @Override
    public void
    onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == PERMISSION_ID) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                getLastLocation();
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        instance = this;
        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);

        // Init UI
        initializeUi();

        // Init Behavior
        initializeBehavior();

        // Save
        btnSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!isFileSave) {
                    // Get dialog_input.xml view
                    LayoutInflater li = LayoutInflater.from(context);
                    View promptsView = li.inflate(R.layout.dialog_input, null);

                    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);

                    // Set dialog_input.xml to alertdialog builder
                    alertDialogBuilder.setView(promptsView);

                    final EditText userInput = (EditText) promptsView.findViewById(R.id.editTextDialogUserInput);

                    // Set dialog message
                    alertDialogBuilder.setCancelable(false).setPositiveButton("Validate", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            // Get date
                            currentDate = new Date();
                            SimpleDateFormat formatterDate = new SimpleDateFormat("yyyyMMdd"); // yy-mm-dd
                            SimpleDateFormat formatterTime = new SimpleDateFormat("HHmmss");
                            String dateNow = formatterDate.format(currentDate.getTime());
                            String timeNow = formatterTime.format(currentDate.getTime());

                            // Get user input and set it to filename
                            File folder = getExternalFilesDir("Sensors"); // Folder Name
                            fileName =  userInput.getText().toString() + "_" + dateNow + "_" + timeNow + ".csv";
                            myFile = new File(folder, fileName); // Filename
                            Toast t = Toast.makeText(MainActivity.this, "Start of the backup.", Toast.LENGTH_SHORT);
                            t.show();
                            isFileSave = true;
                            Intent sensorsService = new Intent(MainActivity.this, SensorsListener.class);
                            startService(sensorsService);
                        }
                    }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            Toast t = Toast.makeText(MainActivity.this, "Backup canceled.", Toast.LENGTH_SHORT);
                            t.show();
                            dialog.cancel();
                        }
                    });
                    // Create alert dialog
                    AlertDialog alertDialog = alertDialogBuilder.create();
                    // Show it
                    alertDialog.show();
                } else {
                    Toast t = Toast.makeText(MainActivity.this, "Backup already in progress, finish there.", Toast.LENGTH_SHORT);
                    t.show();
                }
            }
        });

        // End Save
        btnEndSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (isFileSave) {
                    Toast t = Toast.makeText(MainActivity.this, "End of the backup.", Toast.LENGTH_SHORT);
                    t.show();
                    isFileSave = false;
                    Intent sensorsService = new Intent(MainActivity.this, SensorsListener.class);
                    stopService(sensorsService);
                } else {
                    Toast t = Toast.makeText(MainActivity.this, "No backup in progress.", Toast.LENGTH_SHORT);
                    t.show();
                }
            }
        });

        // Open Sensors Activity
        btnSensorsActivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent sensorsIntent = new Intent(MainActivity.this, SensorsActivity.class);
                startActivity(sensorsIntent);
            }
        });

        // Behavior : Inactivity
        btnInactivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetBehaviorButtonColor();
                btnInactivity.setBackgroundColor(selectedBehaviorColor);
                behavior = 0;
            }
        });

        // Behavior : Horizontal Walk
        btnHorizontalWalk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetBehaviorButtonColor();
                btnHorizontalWalk.setBackgroundColor(selectedBehaviorColor);
                behavior = 1;
            }
        });

        // Behavior : Stairs
        btnStairs.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetBehaviorButtonColor();
                btnStairs.setBackgroundColor(selectedBehaviorColor);
                behavior = 2;
            }
        });

        // Behavior : Escalator
        btnEscalator.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetBehaviorButtonColor();
                btnEscalator.setBackgroundColor(selectedBehaviorColor);
                behavior = 4;
            }
        });

        // Behavior : Elevator
        btnElevator.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetBehaviorButtonColor();
                btnElevator.setBackgroundColor(selectedBehaviorColor);
                behavior = 5;
            }
        });

        // Behavior : Mooving Walkway
        btnMoovingWalkway.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                resetBehaviorButtonColor();
                btnMoovingWalkway.setBackgroundColor(selectedBehaviorColor);
                behavior = 6;
            }
        });
    }

    // Init UI
    private void initializeUi() {
        btnSave = findViewById(R.id.btn_save);
        btnEndSave = findViewById(R.id.btn_end_save);
        btnSensorsActivity = findViewById(R.id.btn_sensors_activity);
        btnInactivity = findViewById(R.id.btn_inactivity);
        btnHorizontalWalk = findViewById(R.id.btn_horizontal_walk);
        btnStairs = findViewById(R.id.btn_stairs);
        btnEscalator = findViewById(R.id.btn_escalator);
        btnElevator = findViewById(R.id.btn_elevator);
        btnMoovingWalkway = findViewById(R.id.btn_mooving_walkway);
    }

    // Init Behavior
    private void initializeBehavior() {
        btnInactivity.setBackgroundColor(selectedBehaviorColor);
        behavior = 0;
    }

    // Reset Behavior Button Color
    private void resetBehaviorButtonColor() {
        btnInactivity.setBackgroundColor(unSelectedBehaviorColor);
        btnHorizontalWalk.setBackgroundColor(unSelectedBehaviorColor);
        btnStairs.setBackgroundColor(unSelectedBehaviorColor);
        btnEscalator.setBackgroundColor(unSelectedBehaviorColor);
        btnElevator.setBackgroundColor(unSelectedBehaviorColor);
        btnMoovingWalkway.setBackgroundColor(unSelectedBehaviorColor);
    }
}