/*
 * Copyright (c) 2003-onwards Shaven Puppy Ltd
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Shaven Puppy' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package worm.effects;

import net.puppygames.applet.TickableObject;
import net.puppygames.applet.effects.Effect;
import worm.Layers;
import worm.Res;

import com.shavenpuppy.jglib.interpolators.SineInterpolator;
import com.shavenpuppy.jglib.opengl.GLRenderable;

import static org.lwjgl.opengl.GL11.*;

/**
 * $Id: SmartbombEffect.java,v 1.11 2010/03/29 22:39:46 foo Exp $
 * The smartbomb effect!
 * @author $Author: foo $
 * @version $Revision: 1.11 $
 */
public class SmartbombEffect extends Effect {

	/** Duration */
	public static final int DURATION = 20;

	/** Final radius */
	private static final float RADIUS = 200.0f;

	/** Width */
	private static final float WIDTH = 30.0f;

	/** Radius */
	private float radius;

	/** Tick */
	private int tick;

	/** Position */
	private float x, y;

	private TickableObject tickableObject;


	/**
	 * C'tor
	 * @param x
	 * @param y
	 */
	public SmartbombEffect(float x, float y) {
		this.x = x;
		this.y = y;
	}

	@Override
	protected void doTick() {
		tick ++;
		radius = SineInterpolator.instance.interpolate(0.0f, RADIUS, (float) tick / (float) DURATION);
	}

	@Override
	protected void doRender() {
	}

	@Override
	protected void doSpawn() {
		tickableObject = new TickableObject() {
			@Override
			protected void render() {
				float xx = x;
				float yy = y;

				glRender(new GLRenderable() {
					@Override
					public void render() {
						glEnable(GL_TEXTURE_2D);
						glEnable(GL_BLEND);
						glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
						glBlendFunc(GL_SRC_ALPHA, GL_ONE);
						Res.getSmartBombTexture().render();
					}
				});

				float innerRadius = SineInterpolator.instance.interpolate(0.0f, Math.max(0.0f, RADIUS - WIDTH), (float) tick / (float) DURATION);

				// Draw rings
				float ox = getOffset().getX();
				float oy = getOffset().getY();
				glBegin(GL_TRIANGLE_STRIP);
				for (int i = 0; i <= 360; i += 8) {
					// Inner vertex
					glColor4f(1.0f, 1.0f, 1.0f, 0.0f);
					glTexCoord2f(i, 1.0f);
					glVertex2f(ox + xx + (float)Math.cos(Math.toRadians(i)) * innerRadius, oy + yy + (float)Math.sin(Math.toRadians(i)) * innerRadius);
					// Outer vertex
					glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
					glTexCoord2f(i, 0.0f);
					glVertex2f(ox + xx + (float)Math.cos(Math.toRadians(i)) * radius, oy + yy + (float)Math.sin(Math.toRadians(i)) * radius);
				}
				glEnd();
			}
		};
		tickableObject.setLayer(Layers.SMARTBOMB_EFFECT);
		tickableObject.spawn(getScreen());
	}

	@Override
	protected void doRemove() {
		if (tickableObject != null) {
			tickableObject.remove();
			tickableObject = null;
		}
	}

	@Override
	public boolean isActive() {
		return tick < DURATION;
	}

	/**
	 * Get the radius
	 * @return float
	 */
	public float getRadius() {
		return radius;
	}

}