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package ensemble.samples.scenegraph.events.keystrokemotion;

import java.util.Random;
import javafx.animation.Interpolator;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.VPos;
import javafx.scene.effect.DropShadow;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Region;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.util.Duration;

public class LettersPane extends Region {

    private static final Font FONT_DEFAULT = new Font(Font.getDefault().getFamily(), 200);
    private static final Random RANDOM = new Random();
    private static final Interpolator INTERPOLATOR = Interpolator.SPLINE(0.295, 0.800, 0.305, 1.000);
    private Text pressText;

    public LettersPane() {
        setId("LettersPane");
        setPrefSize(240, 240);
        setFocusTraversable(true);
        setOnMousePressed(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent me) {
                requestFocus();
                me.consume();
            }
        });
        setOnKeyPressed(new EventHandler<KeyEvent>() {
            @Override
            public void handle(KeyEvent ke) {
                createLetter(ke.getText());
                ke.consume();
            }
        });
        // create press keys text
        pressText = new Text("Press Keys");
        pressText.setTextOrigin(VPos.TOP);
        pressText.setFont(new Font(Font.getDefault().getFamily(), 20));
        pressText.setLayoutY(5);
        pressText.setFill(Color.rgb(80, 80, 80));
        DropShadow effect = new DropShadow();
        effect.setRadius(0);
        effect.setOffsetY(1);
        effect.setColor(Color.WHITE);
        pressText.setEffect(effect);
        getChildren().add(pressText);
    }

    @Override
    protected void layoutChildren() {
        // center press keys text
        pressText.setLayoutX((getWidth() - pressText.getLayoutBounds().getWidth()) / 2);
    }

    private void createLetter(String c) {
        final Text letter = new Text(c);
        letter.setFill(Color.BLACK);
        letter.setFont(FONT_DEFAULT);
        letter.setTextOrigin(VPos.TOP);
        letter.setTranslateX((getWidth() - letter.getBoundsInLocal().getWidth()) / 2);
        letter.setTranslateY((getHeight() - letter.getBoundsInLocal().getHeight()) / 2);
        getChildren().add(letter);
        // over 3 seconds move letter to random position and fade it out
        final Timeline timeline = new Timeline();
        timeline.getKeyFrames().add(
                new KeyFrame(Duration.seconds(3), new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                // we are done remove us from scene
                getChildren().remove(letter);
            }
        },
                new KeyValue(letter.translateXProperty(), getRandom(0.0f, getWidth() - letter.getBoundsInLocal().getWidth()), INTERPOLATOR),
                new KeyValue(letter.translateYProperty(), getRandom(0.0f, getHeight() - letter.getBoundsInLocal().getHeight()), INTERPOLATOR),
                new KeyValue(letter.opacityProperty(), 0f)));
        timeline.play();
    }

    private static float getRandom(double min, double max) {
        return (float) (RANDOM.nextFloat() * (max - min) + min);
    }
}