/***************************************************************************
 *                                Movement.cs
 *                            -------------------
 *   begin                : May 1, 2002
 *   copyright            : (C) The RunUO Software Team
 *   email                : info@runuo.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   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.
 *
 ***************************************************************************/

using System;
using System.Collections;

namespace Server.Movement
{
	public static class Movement
	{
		private static IMovementImpl m_Impl;

		public static IMovementImpl Impl
		{
			get{ return m_Impl; }
			set{ m_Impl = value; }
		}

		public static bool CheckMovement( Mobile m, Direction d, out int newZ )
		{
			if ( m_Impl != null )
				return m_Impl.CheckMovement( m, d, out newZ );

			newZ = m.Z;
			return false;
		}

		public static bool CheckMovement( Mobile m, Map map, Point3D loc, Direction d, out int newZ )
		{
			if ( m_Impl != null )
				return m_Impl.CheckMovement( m, map, loc, d, out newZ );

			newZ = m.Z;
			return false;
		}

		public static void Offset( Direction d, ref int x, ref int y )
		{
			switch ( d & Direction.Mask )
			{
				case Direction.North: --y; break;
				case Direction.South: ++y; break;
				case Direction.West:  --x; break;
				case Direction.East:  ++x; break;
				case Direction.Right: ++x; --y; break;
				case Direction.Left:  --x; ++y; break;
				case Direction.Down:  ++x; ++y; break;
				case Direction.Up:    --x; --y; break;
			}
		}
	}

	public interface IMovementImpl
	{
		bool CheckMovement( Mobile m, Direction d, out int newZ );
		bool CheckMovement( Mobile m, Map map, Point3D loc, Direction d, out int newZ );
	}
}