package appeng.client.render;


import javax.vecmath.Matrix4f;
import javax.vecmath.Vector3f;

import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.common.model.TRSRTransformation;


public enum FacingToRotation
{

	// DUNSWE
	//@formatter:off
	DOWN_DOWN	( new Vector3f(	0,		0,		0	) ), //NOOP
	DOWN_UP		( new Vector3f(	0,		0,		0	) ), //NOOP
	DOWN_NORTH	( new Vector3f(	-90,	0,		0	) ),
	DOWN_SOUTH	( new Vector3f(	-90,	0,		180	) ),
	DOWN_WEST	( new Vector3f(	-90,	0,		90	) ),
	DOWN_EAST	( new Vector3f(	-90,	0,		-90	) ),
	UP_DOWN		( new Vector3f(	0,		0,		0	) ), //NOOP
	UP_UP		( new Vector3f(	0,		0,		0	) ), //NOOP
	UP_NORTH	( new Vector3f(	90,		0,		180	) ),
	UP_SOUTH	( new Vector3f(	90,		0,		0	) ),
	UP_WEST		( new Vector3f(	90,		0,		90	) ),
	UP_EAST		( new Vector3f(	90,		0,		-90	) ),
	NORTH_DOWN	( new Vector3f(	0,		0,		180	) ),
	NORTH_UP	( new Vector3f(	0,		0,		0	) ),
	NORTH_NORTH	( new Vector3f(	0,		0,		0	) ), //NOOP
	NORTH_SOUTH	( new Vector3f(	0,		0,		0	) ), //NOOP
	NORTH_WEST	( new Vector3f(	0,		0,		90	) ),
	NORTH_EAST	( new Vector3f(	0,		0,		-90	) ),
	SOUTH_DOWN	( new Vector3f(	0,		180,	180	) ),
	SOUTH_UP	( new Vector3f(	0,		180,	0	) ),
	SOUTH_NORTH	( new Vector3f(	0,		0,		0	) ), //NOOP
	SOUTH_SOUTH	( new Vector3f(	0,		0,		0	) ), //NOOP
	SOUTH_WEST	( new Vector3f(	0,		180,	-90	) ),
	SOUTH_EAST	( new Vector3f(	0,		180,	90	) ),
	WEST_DOWN	( new Vector3f(	0,		90,		180	) ),
	WEST_UP		( new Vector3f(	0,		90,		0	) ),
	WEST_NORTH	( new Vector3f(	0,		90,		-90	) ),
	WEST_SOUTH	( new Vector3f(	0,		90,		90	) ),
	WEST_WEST	( new Vector3f(	0,		0,		0	) ), //NOOP
	WEST_EAST	( new Vector3f(	0,		0,		0	) ), //NOOP
	EAST_DOWN	( new Vector3f(	0,		-90,	180	) ),
	EAST_UP		( new Vector3f(	0,		-90,	0	) ),
	EAST_NORTH	( new Vector3f(	0,		-90,	90	) ),
	EAST_SOUTH	( new Vector3f(	0,		-90,	-90	) ),
	EAST_WEST	( new Vector3f(	0,		0,		0	) ), //NOOP
	EAST_EAST	( new Vector3f(	0,		0,		0	) ); //NOOP
	//@formatter:on

	private final Vector3f rot;
	private final Matrix4f mat;

	private FacingToRotation( Vector3f rot )
	{
		this.rot = rot;
		this.mat = TRSRTransformation.toVecmath( new org.lwjgl.util.vector.Matrix4f().rotate( (float) Math.toRadians( rot.x ), new org.lwjgl.util.vector.Vector3f( 1, 0, 0 ) ).rotate( (float) Math.toRadians( rot.y ), new org.lwjgl.util.vector.Vector3f( 0, 1, 0 ) ).rotate( (float) Math.toRadians( rot.z ), new org.lwjgl.util.vector.Vector3f( 0, 0, 1 ) ) );
	}

	public Vector3f getRot()
	{
		return rot;
	}

	public Matrix4f getMat()
	{
		return new Matrix4f( this.mat );
	}

	public void glRotateCurrentMat()
	{
		GlStateManager.rotate( rot.x, 1, 0, 0 );
		GlStateManager.rotate( rot.y, 0, 1, 0 );
		GlStateManager.rotate( rot.z, 0, 0, 1 );
	}

	public EnumFacing rotate( EnumFacing facing )
	{
		return TRSRTransformation.rotate( mat, facing );
	}

	public EnumFacing resultingRotate( EnumFacing facing )
	{
		for( EnumFacing face : EnumFacing.values() )
		{
			if( rotate( face ) == facing )
			{
				return face;
			}
		}
		return null;
	}

	public static FacingToRotation get( EnumFacing forward, EnumFacing up )
	{
		return values()[forward.ordinal() * 6 + up.ordinal()];
	}

}