package net.sf.openrocket.gui.figure3d.photo;

import com.jogamp.opengl.GL;
import com.jogamp.opengl.GL2;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLCapabilities;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.GLProfile;
import com.jogamp.opengl.JoglVersion;
import com.jogamp.opengl.awt.GLCanvas;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Rectangle;

public class Test3D {
	public static void main(String[] args) {
		BasicFrame frame = new BasicFrame();
		frame.setVisible(true);
	}

	private static class BasicFrame extends JFrame {
		public BasicFrame() {
			PhotoFrame pa = new PhotoFrame();
			pa.setVisible(true);
		}
	}

	private static class PhotoFrame extends JFrame {
		private final PhotoPanel photoPanel;

		public PhotoFrame() {
			this.setSize(1024, 768);
			photoPanel = new PhotoPanel();
			setContentPane(photoPanel);
		}

	}

	private static class PhotoPanel extends JPanel implements GLEventListener {
		private Component canvas;

		PhotoPanel() {
			this.setLayout(new BorderLayout());
			initGLCanvas();
		}

		private void initGLCanvas() {
			try {
				final GLProfile glp = GLProfile.get(GLProfile.GL2);

				final GLCapabilities caps = new GLCapabilities(glp);
				caps.setBackgroundOpaque(false);
				caps.setSampleBuffers(true);
				caps.setNumSamples(6);

				canvas = new GLCanvas(caps);		// NOTE: using GLJPanel did not work either

				((GLAutoDrawable) canvas).addGLEventListener(this);
				this.add(canvas, BorderLayout.CENTER);
			} catch (Throwable t) {
				canvas = null;
				this.add(new JLabel("Unable to load 3d Libraries: " + t.getMessage()));
			}
		}

		@Override
		public void paintImmediately(Rectangle r) {
			super.paintImmediately(r);
			if (canvas != null)
				((GLAutoDrawable) canvas).display();
		}

		@Override
		public void paintImmediately(int x, int y, int w, int h) {
			super.paintImmediately(x, y, w, h);
			if (canvas != null)
				((GLAutoDrawable) canvas).display();
		}

		@Override
		public void display(final GLAutoDrawable drawable) {
			draw(drawable);
		}

		private void draw(final GLAutoDrawable drawable) {
			GL2 gl = drawable.getGL().getGL2();
			System.out.println(JoglVersion.getInstance().toString(gl));
			float[] color = {1f, 1f, 0f, 1f};

			gl.glEnable(GL.GL_MULTISAMPLE);

			gl.glClearColor(color[0], color[1], color[2], color[3]);
			gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);

			gl.glDisable(GL.GL_BLEND);
			gl.glFrontFace(GL.GL_CCW);
		}

		@Override
		public void init(final GLAutoDrawable drawable) {
			final GL2 gl = drawable.getGL().getGL2();

			gl.glClearDepth(1.0f); // clear z-buffer to the farthest
			gl.glDepthFunc(GL.GL_LESS); // the type of depth test to do

		}

		@Override
		public void dispose(GLAutoDrawable glAutoDrawable) { }

		@Override
		public void reshape(GLAutoDrawable glAutoDrawable, int i, int i1, int i2, int i3) {	}
	}
}