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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.scenes.scene2d.actions;

import com.badlogic.gdx.scenes.scene2d.Action;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.CompositeAction;

public class Sequence extends CompositeAction {

	static final ActionResetingPool pool = new ActionResetingPool(4, 100) {
		@Override
		protected Sequence newObject () {
			return new Sequence();
		}
	};

	protected Actor target;
	protected int currAction = 0;

	public static Sequence $ (Action... actions) {
		Sequence sequence = pool.obtain();
		sequence.actions.clear();
		int len = actions.length;
		for (int i = 0; i < len; i++)
			sequence.actions.add(actions[i]);
		return sequence;
	}

	@Override
	public void setTarget (Actor actor) {
		this.target = actor;
		if (actions.size() > 0) actions.get(0).setTarget(target);
		this.currAction = 0;
	}

	@Override
	public void act (float delta) {
		if (actions.size() == 0) {
			currAction = 1;
			return;
		}

		if (currAction >= actions.size()) {
			callActionCompletedListener();
			return;
		}

		actions.get(currAction).act(delta);
		if (actions.get(currAction).isDone()) {
			actions.get(currAction).callActionCompletedListener();
			currAction++;
			if (currAction < actions.size()) actions.get(currAction).setTarget(target);
		}
	}

	@Override
	public boolean isDone () {
		return currAction >= actions.size();
	}

	@Override
	public void finish () {
		pool.free(this);
		super.finish();
	}

	@Override
	public Action copy () {
		Sequence action = pool.obtain();
		action.actions.clear();
		int len = actions.size();
		for (int i = 0; i < len; i++) {
			action.actions.add(actions.get(i).copy());
		}
		return action;
	}

	@Override
	public Actor getTarget () {
		return target;
	}
}