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/*
 * Copyright (c) 2008, 2014, Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
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((MouseEvent me) -> {
            requestFocus();
            me.consume();
        });
        setOnKeyPressed((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), (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);
    }
}