namespace Tickypip
{
	using System;

	public enum ServerCellHalf
	{
		Top,
		Bottom
	};

	public class ServerCell : ConnectorCell
	{
		private ServerCellHalf mHalf;
		bool mDirLock = false;

		public ServerCell(Board board, ServerCellHalf half,
						  ConnectorType connType)
			: base(board, connType)
		{
			Half = half;

			DirectionChanged += new
				DirectionChangedEventHandler(OnDirectionChanged);

			Gnome.CanvasRect rect = new Gnome.CanvasRect(this);
			rect.FillColorGdk = new Gdk.Color(255, 0, 0);
			rect.X1 = 5;
			rect.Y1 = 5;
			rect.X2 = WIDTH - 6;
			rect.Y2 = HEIGHT - 6;
		}

		public ServerCell(Board board, ServerCellHalf half)
			: this(board, half, ConnectorType.None)
		{
		}

		public override bool Active
		{
			get { return true; }
		}

		public ServerCellHalf Half
		{
			get { return mHalf;  }
			set { mHalf = value; }
		}

		private void OnDirectionChanged(Cell thisCell)
		{
			if (mDirLock)
				return;

			Cell cell = Board.GetNearCell(this, (Half == ServerCellHalf.Top
												 ? Direction.South
												 : Direction.North));

			if (cell == null)
				return;

			mDirLock = true;
			cell.Direction = Direction;
			mDirLock = false;
		}

		protected override void AddLine(Direction dir, bool spanSize,
										Gdk.Color color)
		{
			if ((Half == ServerCellHalf.Top &&
				 ((dir == Direction.South && !spanSize) ||
				  dir == Direction.East || dir == Direction.West)) ||
				(Half == ServerCellHalf.Bottom &&
				 (dir == Direction.North && !spanSize)))
			{
				return;
			}

			base.AddLine(dir, spanSize, color);
		}

		public override bool HasConnector(Direction dir)
		{
			if ((Half == ServerCellHalf.Top    && dir != Direction.North) ||
				(Half == ServerCellHalf.Bottom && dir == Direction.North))
			{
				return false;
			}

			return base.HasConnector(dir);
		}
	}
}