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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package ensemble.samples.media.audioclip;

import java.io.File;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URL;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.effect.Light;
import javafx.scene.effect.Lighting;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.media.AudioClip;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

/**
 * A sample that demonstrates the basics of AudioClips.
 *
 * @sampleName Audio Clip
 * @preview preview.png
 * @docUrl http://docs.oracle.com/javase/8/javafx/media-tutorial/overview.htm#JFXMD101 Using JavaFX Media
 * @see javafx.scene.layout.StackPane
 * @see javafx.scene.media.AudioClip
 * @highlight
 * @conditionalFeatures WEB, MEDIA
 *
 * @related /Media/Alpha Media Player
 * @related /Media/Overlay Media Player
 * @related /Media/Streaming Media Player
 * @related /Graphics 3d/Xylophone
 */
public class AudioClipApp extends Application {
    public Parent createContent() {
        final double xStart = 12;
        final double xOffset = 30.0;
        final double barWidth = 22.0;

        Rectangle r1 = new Rectangle(0, 15, barWidth * 11.5, 10);
        r1.setFill(new Color(0.2, 0.12, 0.1, 1.0));
        Rectangle r2 = new Rectangle(0, -25, barWidth * 11.5, 10);
        r2.setFill(new Color(0.2, 0.12, 0.1, 1.0));

        final Group content = new Group(
                r1,
                r2,
                createKey(Color.PURPLE, xStart + 0 * xOffset, barWidth, 1),
                createKey(Color.BLUEVIOLET, xStart + 1 * xOffset, barWidth, 2),
                createKey(Color.BLUE, xStart + 2 * xOffset, barWidth, 3),
                createKey(Color.GREEN, xStart + 3 * xOffset, barWidth, 4),
                createKey(Color.GREENYELLOW, xStart + 4 * xOffset, barWidth, 5),
                createKey(Color.YELLOW, xStart + 5 * xOffset, barWidth, 6),
                createKey(Color.ORANGE, xStart + 6 * xOffset, barWidth, 7),
                createKey(Color.RED, xStart + 7 * xOffset, barWidth, 8));

        // A StackPane by default centers its children, here we extend it to
        // scale the content to fill the StackPane first.
        StackPane root = new StackPane() {
            @Override protected void layoutChildren() {
                // find biggest scale that will fit while keeping proportions
                double scale = Math.min(
                    (getWidth()-20) / content.getBoundsInLocal().getWidth(),
                    (getHeight()-20) / content.getBoundsInLocal().getHeight()
                );
                content.setScaleX(scale);
                content.setScaleY(scale);
                super.layoutChildren();
            }
        };
        root.getChildren().add(content);
        return root;
    }

    /*
     * See JDK-8177428 for an explanation of why this is here.
     */
    private static AudioClip getNoteClip(String name) {
        // First look for the clips in a directory next to our jar file
        try {
            // Get a URI to this class file
            URI baseURI = AudioClipApp.class.getResource("AudioClipApp.class").toURI();

            // If we have a jar URL, get the embedded http or file URL
            // and trim off the internal jar path, this will leave us
            // with a URL to the jar file
            if (baseURI.getScheme().equals("jar")) {
                String basePath = baseURI.getSchemeSpecificPart();
                if (basePath.contains("!/")) {
                    basePath = basePath.substring(0, basePath.indexOf("!/"));
                }
                baseURI = new URI(basePath);
            }

            URL noteURL = baseURI.resolve("resources/"+name).toURL();

            // check if the resource exists, then try to load it
            if (noteURL.getProtocol().equals("http")) {
                HttpURLConnection urlCon = (HttpURLConnection)noteURL.openConnection();
                urlCon.setRequestMethod("HEAD");
                urlCon.connect();
                if (urlCon.getResponseCode() != HttpURLConnection.HTTP_OK) {
                    noteURL = null;
                }
                urlCon.disconnect();
            } else if (noteURL.getProtocol().equals("file")) {
                File f = new File(noteURL.getPath());
                if (!f.exists() || !f.isFile()) {
                    noteURL = null;
                }
            } else {
                // unsupported protocol
                noteURL = null;
            }
            if (noteURL != null) {
                return new AudioClip(noteURL.toExternalForm());
            }
        } catch (Exception e) {} // fail gracefully

        // Fall back on the embedded clips
        return new AudioClip(
                AudioClipApp.class.getResource("/ensemble/samples/shared-resources/"+name).toExternalForm());
    }

    public static Rectangle createKey(Color color, double x,
                                      double width, int note) {

        double height = 100 - ((note - 1) * 5);
        // create a audio clip that this key will play
        final AudioClip barNote = getNoteClip("Note"+note+".wav");

        // create the rectangle that draws the key
        Rectangle rectangle = new Rectangle(x, -(height / 2), width, height);
        rectangle.setFill(color);
        Lighting lighting = new Lighting(new Light.Point(-20, -20, 100, Color.WHITE));
        lighting.setSurfaceScale(1);
        rectangle.setEffect(lighting);
        rectangle.setOnMousePressed((MouseEvent me) -> {
            barNote.play();
        });
        return rectangle;
    }

    @Override public void start(Stage primaryStage) throws Exception {
        primaryStage.setScene(new Scene(createContent()));
        primaryStage.show();
    }

    /**
     * Java main for when running without JavaFX launcher
     * @param args command line arguments
     */
    public static void main(String[] args) { launch(args); }
}