/// <summary>
/// Use to see the game state following a potential move.
/// </summary>
/// <param name="potentialTurn"></param>
/// <param name="doRecycle">True to specify that the caller expects the returned
/// IGameState to be reused upon the next call to this function. False to specify
/// that the caller needs the returned IGameState to be unaltered by future calls
/// to this function.</param>
/// <returns>An IGameState representing the state that the game would
/// be in if the given turn were applied to the current game state.</returns>
internal IGameState SimulateMove(TurnRecord potentialTurn, bool doRecycle = true)
{
SimulatedGameState simulatedState = lastSimulatedState;
if (simulatedState == null || !doRecycle)
{
simulatedState = new SimulatedGameState(this, potentialTurn);
}
else if (doRecycle)
{
simulatedState.Initialize(potentialTurn);
}
return(simulatedState);
}
internal void Initialize(TurnRecord pendingTurn)
{
this.pendingTurn = pendingTurn;
this.activePieces = new Dictionary <Piece, BoardPosition>(basedOn.ActivePiecePositions);
if (pendingTurn.Capture != null)
{
this.activePieces.Remove(pendingTurn.Capture.PieceCaptured);
}
this.activePieces[pendingTurn.Move.PieceMoved] = pendingTurn.Move.To;
if (pendingTurn.SecondaryMove != null)
{
this.activePieces[pendingTurn.SecondaryMove.PieceMoved] = pendingTurn.SecondaryMove.To;
}
_gameInfo = new GameInformation(
basedOn.GameInformation.GameDataStore,
basedOn.GameInformation.FriendlyName,
basedOn.GameInformation.GameType,
DateTime.Now,
basedOn.GameInformation.MoveCount + 1,
basedOn.GameInformation.IsActive);
}
internal StateChangedEventArgs(TurnRecord turnRecord, IGameState gameState)
{
TurnRecord = turnRecord;
GameState = gameState;
}
internal SimulatedGameState(IGameState basedOn, TurnRecord pendingTurn)
{
this.basedOn = basedOn;
Initialize(pendingTurn);
}
/// <summary>
/// Modify the model state according to the specified turn.
/// </summary>
/// <param name="turn"></param>
internal void ExecuteMove(TurnRecord turn, bool isUserInitiated)
{
Piece piece = null;
numMoves++; // TODO: consider adding num moves to GameInfo and storing in place of Side in the saved game files.
// If the turn record was created from a serialized game record, the piece info
// may not be fully specified. In this case, we should fill in the missing info
// before saving the turn record on the game history stack.
if (turn.Move.PieceMoved == null)
{
turn.Move.UpdatePieceMoved(this);
}
if (turn.SecondaryMove != null && turn.SecondaryMove.PieceMoved == null)
{
turn.SecondaryMove.UpdatePieceMoved(this);
}
if (turn.Capture != null)
{
if (turn.Capture.PieceCaptured == null)
{
turn.Capture.UpdatePieceCaptured(turn.Move, this);
}
piece = turn.Capture.PieceCaptured;
activePiecePositions.Remove(piece);
capturedPieces.Add(piece);
}
if (turn.Promotion != null)
{
if (turn.Promotion.PiecePromoted == null)
{
turn.Promotion.UpdatePiecePromoted(turn.Move, this);
}
piece = turn.Promotion.PiecePromoted;
piece.Capabilities = turn.Promotion.NewCapabilities;
}
piece = turn.Move.PieceMoved;
boardState[turn.Move.From.Column, turn.Move.From.Row] = null;
boardState[turn.Move.To.Column, turn.Move.To.Row] = piece;
activePiecePositions[piece] = turn.Move.To;
piece.TurnLastMoved = numMoves;
if (turn.SecondaryMove != null)
{
piece = turn.SecondaryMove.PieceMoved ?? GetPieceAt(turn.SecondaryMove.From);
boardState[turn.SecondaryMove.From.Column, turn.SecondaryMove.From.Row] = null;
boardState[turn.SecondaryMove.To.Column, turn.SecondaryMove.To.Row] = piece;
activePiecePositions[piece] = turn.SecondaryMove.To;
piece.TurnLastMoved = numMoves;
}
history.Add(turn);
if (isUserInitiated)
{
// rename and refactor
UpdateGameInfo();
}
OnStateChanged(new StateChangedEventArgs(turn, this));
}