/*******************************************************************************
 * Breakout Cave Survey Visualizer
 *
 * Copyright (C) 2014 James Edwards
 *
 * jedwards8 at fastmail dot fm
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *******************************************************************************/
package org.andork.jogl;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import com.jogamp.opengl.GL2ES2;

public class JoglScene implements JoglDrawable, JoglResourceManager {
	private final LinkedList<JoglResource> needDispose = new LinkedList<JoglResource>();
	private final LinkedList<JoglResource> needInitialize = new LinkedList<JoglResource>();
	private List<JoglDrawable> drawables = new ArrayList<JoglDrawable>();
	private List<JoglDrawable> unmodifiableDrawables = Collections.unmodifiableList(drawables);

	public void add(JoglDrawable drawable) {
		drawables.add(drawable);
	}

	@Override
	public void disposeLater(JoglResource resource) {
		needDispose.add(resource);
	}

	@Override
	public void draw(JoglDrawContext context, GL2ES2 gl, float[] m, float[] n) {
		JoglResource resource;

		while ((resource = needInitialize.poll()) != null) {
			resource.init(gl);
		}
		while ((resource = needDispose.poll()) != null) {
			resource.dispose(gl);
		}

		for (JoglDrawable drawable : drawables) {
			drawable.draw(context, gl, m, n);
		}
	}

	public List<JoglDrawable> getDrawables() {
		return unmodifiableDrawables;
	}

	public List<JoglDrawable> getDrawablesDirect() {
		return drawables;
	}

	@Override
	public void initLater(JoglResource resource) {
		needInitialize.add(resource);
	}

	public void remove(JoglDrawable drawable) {
		drawables.remove(drawable);
	}

	public void setDrawablesDirect(List<JoglDrawable> drawables) {
		this.drawables = drawables;
		unmodifiableDrawables = Collections.unmodifiableList(drawables);
	}
}