package nz.ac.otago.infosci.timekeeper;

import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.VibrationEffect;
import android.os.Vibrator;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ProgressBar;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatDelegate;

import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;

public class TimerActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final View root = getWindow().getDecorView();
        final Window window = getWindow();

        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);

        // keep screen on
        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

        // completely black background
        root.setBackgroundColor(Color.BLACK);


        // fullscreen
        root.setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                        | View.SYSTEM_UI_FLAG_IMMERSIVE
                        | View.SYSTEM_UI_FLAG_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
        );

        setContentView(R.layout.activity_timer);


        final TextView txtCounter = findViewById(R.id.txtCounter);
        final ProgressBar progressBar = findViewById(R.id.progressBar);
        final TextView txtTime = findViewById(R.id.txtTime);

        Intent it = getIntent();

        final int endHour = it.getIntExtra("endHour", -1);
        final int endMinutes = it.getIntExtra("endMinutes", -1);

        final LocalTime start = LocalTime.now();
        final LocalTime end = LocalTime.of(endHour, endMinutes);

        final int duration = Math.toIntExact(ChronoUnit.MILLIS.between(start, end));


        progressBar.setMax(duration);
        progressBar.setMin(0);

        final DateTimeFormatter timeFmt = DateTimeFormatter.ofPattern("h:mm a");

        new CountDownTimer(duration, 5000) {

            public void onTick(long millisUntilFinished) {
                LocalTime now = LocalTime.now();
                int remaining = Math.toIntExact(ChronoUnit.MINUTES.between(now, end));
                txtCounter.setText(String.valueOf(remaining + 1));
                progressBar.setProgress(duration - Math.toIntExact(millisUntilFinished), true);
                txtTime.setText(timeFmt.format(now).toLowerCase());
            }

            public void onFinish() {
                progressBar.setBackgroundColor(Color.RED);
                ((Vibrator) getApplicationContext().getSystemService(VIBRATOR_SERVICE)).vibrate(VibrationEffect.createOneShot(500, 255));
            }

        }.start();

    }

}