//DEPS org.openjfx:javafx-graphics:11.0.2:${os.detected.jfxname}
import java.util.ArrayList;

import javafx.animation.*;
import javafx.application.*;
import javafx.event.*;
import javafx.geometry.*;
import javafx.scene.*;
import javafx.scene.effect.*;
import javafx.scene.layout.*;
import javafx.scene.paint.*;
import javafx.scene.shape.*;
import javafx.stage.*;
import javafx.util.Duration;

public class SpinnyStar extends Application {
	Pane pane = new Pane();
	
	int width = 500;
	int height = 500;
	int cx = width / 2; //origin X
	int cy = height / 2; // origin y
	double rotate = 0;
	int r = 25;
	ArrayList<Hexagram> hexagrams = new ArrayList<Hexagram>();
	
	@Override
	public void start(Stage stage) throws Exception {
		pane.setBackground(new Background(new BackgroundFill(Color.BLACK, CornerRadii.EMPTY, Insets.EMPTY)));
		
		if (hexagrams.size() == 0) {
			Hexagram hexagram = new Hexagram(r);
			hexagrams.add(hexagram);
		}
		
		EventHandler<ActionEvent> eventHandler = e -> {
			pane.getChildren().clear();
			ArrayList<Hexagram> hexList= (ArrayList<Hexagram>) hexagrams.clone();
			double circleSize = 5.0;
			for(Hexagram h : hexList) {
				Group g = new Group();
				h.increaseRadius();
				Point2D[] hexPoints = h.getPoints();
				for(Point2D point : hexPoints) {
					double x = point.getX();
					double y = point.getY();
					Circle c = new Circle(x, y, circleSize, Color.AQUA);
					c.setEffect(new BoxBlur(2, 2, 3));
					g.getChildren().add(c);
				}
				h.increaseRotation();
				g.setRotate(h.getRotate());
				pane.getChildren().add(g);
				//System.out.println(h.getRadius());
				if(h.getRadius() == 50) {
					//System.out.println("New Hexagram");
					Hexagram hexagram = new Hexagram(r);
					hexagrams.add(hexagram);
				}
				if(h.getRadius() > 1000) {
					hexagrams.remove(hexagrams.indexOf(h));
				}
			}
			//r++;
			
		};
		Timeline animation = new Timeline(
			new KeyFrame(Duration.millis(25), eventHandler));
		animation.setCycleCount(Timeline.INDEFINITE);
		animation.play();
		
		Scene scene = new Scene(pane, width, height);
		stage.setScene(scene);
		stage.setMaximized(true);
		stage.show();
	}

	public static void main(String[] args) {
		launch(args);
	}
	
	class Hexagram extends Circle {
		Point2D[] points = new Point2D[36];
		
		public Hexagram() {
			this(1.0);
		}
		
		public void increaseRotation() {
			double rotate = super.getRotate() == 360 ? 0 : super.getRotate()-0.4;
			super.setRotate(rotate);
			//updatePoints();
		}

		public void increaseRadius() {
			double radius = super.getRadius();
			super.setRadius(radius+0.5);
			updatePoints();
		}

		private void updatePoints() {
			for (int i = 0; i < points.length; i++) {
				int angle = (360 / points.length) * i;
				
				double maths = angle % (360 / 6);
				maths = Math.abs(30 - maths); // distance from 45 degrees
				maths = super.getRadius() - (super.getRadius() * (maths/90) );
				double X = cx + maths * Math.sin(Math.toRadians(angle));
				double Y = cy + maths * Math.cos(Math.toRadians(angle));
				//System.out.printf("Point %2d:\t%.2f,%.2f\n", i, X, Y);
				Point2D p = new Point2D(X, Y);
				points[i] = p;
			}
		}

		public Hexagram(double radius) {
			super(radius);
			//System.out.printf("Origin:\t(%2d,%-2d)\n", cx, cy);
			for (int i = 0; i < points.length; i++) {
				int angle = (360 / points.length) * i;
				
				double maths = angle % (360 / 6);
				maths = Math.abs(30 - maths); // distance from 45 degrees
				maths = super.getRadius() - (super.getRadius() * (maths/90) );
				double X = cx + maths * Math.sin(Math.toRadians(angle));
				double Y = cy + maths * Math.cos(Math.toRadians(angle));
				//System.out.printf("Point %2d:\t%.2f,%.2f\n", i, X, Y);
				Point2D p = new Point2D(X, Y);
				points[i] = p;
			}
		}

		public Point2D[] getPoints() {
			return points;
		}
	}

}