/**
* Move a Player one step in a given direction.
* @param player The player to move.
* @param direction The direction in which to move.
* @throws InvalidOperationException if it's not the player's turn or the player tries to move to an
* illegal location.
*/
public void Move(Player player, Direction direction)
{
int curX = player.X;
int curY = player.Y;
if (!player.Equals(_currentPlayer))
{
throw new InvalidOperationException("Cannot move a piece other than your own.");
}
int newX = curX + direction.DeltaX;
int newY = curY + direction.DeltaY;
if (newX < 0 || newX > _maxX || newY < 0 || newY > _maxY)
{
throw new InvalidOperationException("Cannot move to (" + newX + "," + newY + "); it is off the board");
}
BoardObject newOccupant = _grid[newX, newY];
if (newOccupant.BlocksMovement())
{
throw new InvalidOperationException("Cannot move to (" + newX + "," + newY + "); it is occupied by " + newOccupant);
}
if (newOccupant is Prize)
{
Prize prize = (Prize)newOccupant;
player.IncreaseScore(prize.Points);
_prizes.Remove(prize);
}
_grid[newX, newY] = player;
player.SetPosition(newX, newY);
_grid[curX, curY] = new EmptySpace();
_grid[curX, curY].SetPosition(curX, curY);
Console.WriteLine($"Player {GameEngine.GetPlayerLetter(player)} decided to move {direction}\n");
}
protected Direction?GetDirection(Board board, BoardObject target)
{
// try X first
if (target.X > X && IsOpen(board, Direction.RIGHT))
{
return(Direction.RIGHT);
}
if (target.X < X && IsOpen(board, Direction.LEFT))
{
return(Direction.LEFT);
}
if (target.Y > Y && IsOpen(board, Direction.UP))
{
return(Direction.UP);
}
if (target.Y < Y && IsOpen(board, Direction.DOWN))
{
return(Direction.DOWN);
}
return(null);
}