/*******************************************************************************
 * Copyright (c) 2007- VTT Technical Research Centre of Finland.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.proconf.g3d.animation;

import java.util.ArrayList;
import java.util.List;

import org.simantics.db.Graph;
import org.simantics.proconf.g3d.base.ScenegraphAdapter;


public class AnimationSystem {
	private ScenegraphAdapter adapter;
	private List<AnimationController> animationControllers = new ArrayList<AnimationController>();
    
	private List<AnimationSystemListener> listeners = new ArrayList<AnimationSystemListener>();
	
	private boolean pause = false;
	
	public AnimationSystem(ScenegraphAdapter adapter) {
		if (adapter == null)
			throw new IllegalArgumentException("ScenegraphAdapter must not be null");
		this.adapter = adapter;
	}
	
	public void add(AnimationController controller) {
		animationControllers.add(controller);
		for (AnimationSystemListener l : listeners)
    		l.animationAdded(this, controller);
	}
	
	public void addListener(AnimationSystemListener l) {
		listeners.add(l);
	}
	
	public void removeListener(AnimationSystemListener l) {
		listeners.remove(l);
	}
	
	public boolean isRunning() {
		return animationControllers.size() > 0;
	}
	
	public void pause() {
		if (pause)
			return;
		pause = true;
		for (AnimationSystemListener l : listeners)
    		l.animationPaused(this);
	}
	
	public void play() {
		if(!pause)
			return;
		pause = false;
		for (AnimationSystemListener l : listeners)
    		l.animationPlay(this);
	}
	
	public void stop() {
		for (AnimationController c : animationControllers)
    		c.dispose();
    	animationControllers.clear();
    	for (AnimationSystemListener l : listeners)
    		l.animationStopped(this);
	}
	
	public boolean isPause() {
		return pause;
	}
	
	public void run(Graph graph, double frameTime) {
		if (pause)
			return;
		 if (animationControllers.size() > 0) {
	        for (AnimationController c : animationControllers)
				c.updateAnimation(graph, frameTime);
			adapter.setChanged(true);
	     }
	}
	
	public List<AnimationController> getAnimationControllers() {
		return animationControllers;
	}
	
}