// Project StopWatch
// Source code file: 
// Version 2, which accounts for device rotation
// and pausing the app.

package it372.stopwatch;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
    private int seconds;
    private boolean running;
    private boolean wasRunning;

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

        seconds = 0;
        running = false;
        if (savedInstanceState != null) {
            seconds = savedInstanceState.getInt("seconds");
            running = savedInstanceState.getBoolean("running");
            wasRunning = savedInstanceState.getBoolean("wasRunning");
        }
        runTimer( );
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        super.onSaveInstanceState(savedInstanceState);
        savedInstanceState.putInt("seconds", seconds);
        savedInstanceState.putBoolean("running", running);
        savedInstanceState.putBoolean("wasRunning", wasRunning);
    }

    // Event listener for Start button.
    public void onClickStart(View view) {
        running = true;
    }

    // Event listener for Click button.
    public void onClickStop(View view) {
        running = false;
    }

    // Event listener for Reset button.
    public void onClickReset(View view) {
        running = false;
        seconds = 0;
    }

    @Override
    public void onPause( ) {
        super.onPause( );
        wasRunning = running;
        running = false;
    }

    @Override
    public void onResume( ) {
        super.onResume( );
        if (wasRunning) {
            running = true;
        }
    }

    private void runTimer( ) {
        final TextView timeView = findViewById(R.id.txt_time);
        final Handler handler = new Handler( );
        handler.post(new Runnable( ) {
            @Override
            public void run( ) {
                int hours = seconds / 3600;
                int minutes = (seconds % 3600) / 60;
                int secs = seconds % 60;

                String formattedTime = String.format(
                        "%d:%02d:%02d", hours, minutes, secs);
                timeView.setText(formattedTime);
                if (running) {
                    seconds++;
                }
                handler.postDelayed(this, 1000);
            }
        });
    }
}