/**
 * File for the CountdownExitButton class.
 */

package de.fhswf.in.inf.java2.aufgabe04;

import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.scene.control.Button;
import javafx.util.Duration;

/**
 * A class that fires automatically after a given interval.
 *
 * @author Stefan Suhren
 * @version 1.0
 */
public class CountdownExitButton extends Button
{

   private int countdown = 30;

   private Timeline timeline = new Timeline();

   /**
    * A Button that exits the application.
    *
    * @param text
    *           The text that will be displayed
    * @param countdown
    *           The time in seconds till the button fires
    */
   public CountdownExitButton(String text, int countdown)
   {
      super(text);
      setCountdown(countdown);

      timeline.setCycleCount(Timeline.INDEFINITE);
      timeline
            .getKeyFrames()
            .add(new KeyFrame(
                  Duration.seconds(1),
                  (e -> {
                  CountdownExitButton.this
                           .setText(CountdownExitButton.this
                                 .getText()
                                 .replaceAll(
                                       "\\("
                                             + CountdownExitButton.this.countdown
                                             + "\\)$",
                                       "("
                                             + --CountdownExitButton.this.countdown
                                             + ")"));
                  if (CountdownExitButton.this.countdown <= 0)
                  {
                     CountdownExitButton.this.stopCountdown();
                     CountdownExitButton.this.fire();
                  }
               })));
   }

   /**
    * Starts the countdown.
    *
    */
   public void startCountdown()
   {
      setText(getText() + " (" + countdown + ")");
      timeline.playFromStart();
   }

   /**
    * Stops the countdown without the button fire event.
    *
    */
   public void stopCountdown()
   {
      timeline.stop();
      setText(getText().replaceAll(
            "\\(" + CountdownExitButton.this.countdown + "\\)$", ""));
   }

   /**
    * Set the countdown.
    *
    * @param countdown
    *           The time in seconds till the button fires.
    */
   public void setCountdown(int countdown)
   {
      if (countdown < 0)
      {
         throw new IllegalArgumentException("Countdown can't be negative.");
      }
      this.countdown = countdown;
   }

   /**
    * Get the countdown.
    *
    * @return The countdown in seconds.
    */
   public int getCountdown()
   {
      return countdown;
   }

   /* (non-Javadoc)
    * @see javafx.scene.control.Button#fire()
    */
   @Override
   public void fire()
   {
      stopCountdown();
      super.fire();
   }
}