namespace Server.Movement
{
    public static class Movement
    {
        public static IMovementImpl Impl { get; set; }

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