/*
 * Asteroid.cs
 * Authors:
 * Copyright (c) 2007-2008 Cornell University

 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using tAC_Engine.Graphics.Entities;
using TACParticleEngine;
using TACParticleEngine.Particles;
using Random = Util.Random;

namespace ColonySim
{
	class Asteroid : EntityModel
	{
		Vector2 mPosition = Vector2.Zero;

		Vector3 mCurrentRotation = Vector3.Zero;
		Vector3 mRotationSpeed = Vector3.Zero;

		ParticleEngine effect;

		//Vector3[] mParticlePositions = new Vector3[2];

		Vector2? mGrabPosition;
		public Vector2? GrabPosition
		{
			get { return mGrabPosition; }
			//set { mGrabPosition = value; }
		}

		public void Grab(Vector2? pPosition, ParticleManager pParticleManager)
		{
			mGrabPosition = pPosition;
			effect = pParticleManager.Load(@"ParticleEffects\AsteroidBeam");
			
			Vector3[] mParticlePositions = new Vector3[2];
			mParticlePositions[0] = new Vector3(mPosition.X, -3, mPosition.Y);
			mParticlePositions[1] = new Vector3(((Vector2)mGrabPosition).X, 0, ((Vector2)mGrabPosition).Y);
			
			effect.SetEnginePositions(mParticlePositions);
			effect.SetEngineColor(Color.White.ToVector4(), true);
			effect.SetActive(true);
		}

		// NOTE: Unused?
		const float VIEW_BUFFER = 4f;

		public Asteroid(Vector2 pPosition, ContentManager pContent)
			: base(pContent, @"Models\Asteroid", null)
		{
			mPosition = pPosition;
			TransformationMatrix = Matrix.CreateTranslation(new Vector3(mPosition.X, -.75f, mPosition.Y));

			mRotationSpeed = new Vector3(Random.NextFloat(-1, 1), Random.NextFloat(-1, 1), Random.NextFloat(-1, 1)); 

		}

		public override void Update(GameTime gameTime)
		{
			// Only if we're visible
			if (Visible)
			{
				TransformationMatrix = Matrix.CreateRotationX(mCurrentRotation.X) * Matrix.CreateRotationY(mCurrentRotation.Y) *
					Matrix.CreateRotationZ(mCurrentRotation.Z) * Matrix.CreateTranslation(new Vector3(mPosition.X, -.75f, mPosition.Y));

				mCurrentRotation += mRotationSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds;
			}
		}
	}
}