public void PromotePiece(Position position, PieceTypeIdentifier type)
{
position.CheckValidity();
if (CurrentTurnActions >= GameConstants.ActionsPerTurn)
throw new GameException("You may not perform any more actions this turn");
Hex hex = GetHex(position);
Piece piece = hex.Piece;
if (piece == null)
throw new GameException("There is no piece to promote, the specified hex is empty");
if (piece.Type.Identifier != PieceTypeIdentifier.Pawn)
throw new GameException("Only pawns may be promoted");
if (!piece.CanMove)
throw new GameException("This piece has already been moved this turn and can hence not be promoted");
if(type == PieceTypeIdentifier.Pawn)
throw new GameException("Invalid promotion identifier");
bool isClear = true;
foreach (Hex neighbour in hex.Neighbours)
{
Piece neighbourPiece = neighbour.Piece;
if (neighbourPiece != null && !object.ReferenceEquals(neighbourPiece.Owner, CurrentTurnPlayer))
{
isClear = false;
break;
}
}
if (!isClear)
throw new GameException("You cannot promote a piece that is in direct proximity of an opponent's piece");
Piece newPiece = new Piece(GameConstants.Pieces[type], CurrentTurnPlayer);
hex.Piece = newPiece;
newPiece.Hex = hex;
newPiece.CanMove = false;
piece.Hex = null;
CurrentTurnActions++;
}
public Hex GetHex(Position position)
{
position.CheckValidity();
int index = position.X + position.Y * GameConstants.GridSizeX;
return _Grid[index];
}
public void MovePiece(Position source, Position destination)
{
source.CheckValidity();
destination.CheckValidity();
if (source.Equals(destination))
throw new GameException("Tried to move a piece to its current location");
if (CurrentTurnActions >= GameConstants.ActionsPerTurn)
throw new GameException("You have already performed the maximum number of actions in this turn");
Hex sourceHex = GetHex(source);
Hex destinationHex = GetHex(destination);
Piece attacker = sourceHex.Piece;
Piece defender = destinationHex.Piece;
if (attacker == null)
throw new GameException("There is no piece on the specified hex");
if (attacker.Owner != CurrentTurnPlayer)
throw new GameException("Tried to move a piece of the opponent");
if (!attacker.CanMove)
throw new GameException("Tried to move a piece that had already been used in this turn");
if (!PieceCanReachHex(attacker, destinationHex))
throw new GameException("The piece is unable to reach the destination");
if (defender != null)
{
if (attacker.Owner == defender.Owner)
throw new GameException("You cannot capture your own pieces");
int attackSum = GetAttackSum(attacker, defender);
if (attackSum < defender.Type.Defence)
throw new GameException("Your attack is too weak to capture this piece");
attacker.Owner.Captures.Add(defender.Type);
defender.Owner.Pieces.Remove(defender);
}
attacker.Hex = destinationHex;
sourceHex.Piece = null;
destinationHex.Piece = attacker;
attacker.CanMove = false;
CurrentTurnActions++;
}