private bool CheckIfCheck(IBoard gameBoard, Position kingPosition, IDictionary<Position, IFigure> defenderFigures)
{
var defenderFiguresPositions = defenderFigures.Keys;
var counter = 0;
foreach (var position in defenderFiguresPositions)
{
var figure = defenderFigures[position];
var availableMovements = figure.Move(this.strategy);
try
{
var tryMove = new Move(position, kingPosition);
this.CheckValidMove(figure, availableMovements, tryMove);
}
catch (Exception ex)
{
counter++;
}
}
if (counter == defenderFigures.Count)
{
return false;
}
return true;
}
public virtual void ValidateMove(IFigure figure, IBoard board, Move move)
{
if (figure.IsFirstMove)
{
figure.IsFirstMove = false;
}
}
public void ValidateMove(IFigure figure, IBoard board, Move move)
{
var rowDistance = Math.Abs(move.From.Row - move.To.Row);
var colDistance = Math.Abs(move.From.Col - move.To.Col);
if (rowDistance != colDistance)
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
int rowDirection = move.From.Row > move.To.Row ? -1 : 1;
int colDirection = move.From.Col > move.To.Col ? -1 : 1;
var row = move.From.Row;
var col = move.From.Col;
var endRow = move.To.Row + (rowDirection * (-1));
var endCol = move.To.Col + (colDirection * (-1));
while (row != endRow && col != endCol)
{
row += rowDirection;
col += colDirection;
if (board.SeeFigureOnPosition(row, col) != null)
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
}
base.ValidateMove(figure, board, move);
}
private bool CheckValidStep(Move move, int directionRow, int directionCol)
{
if (move.To.Row == move.From.Row + directionRow && move.To.Col == move.From.Col + directionCol)
{
return true;
}
return false;
}
private bool ValidCastleMove(IFigure figure, IBoard board, Move move)
{
var whiteLongCastle = CheckCaslte(figure, board, move, FigureColor.White, 7, 2, 1, 4);
var whiteShortCastle = CheckCaslte(figure, board, move, FigureColor.White, 7, 6, 5, 6);
var blackLongCastle = CheckCaslte(figure, board, move, FigureColor.Black, 0, 2, 1, 4);
var blackShortCastle = CheckCaslte(figure, board, move, FigureColor.Black, 0, 6, 5, 6);
return whiteShortCastle || whiteLongCastle ||
blackShortCastle || blackLongCastle;
}
public void ValidateMove(IFigure figure, IBoard board, Move move)
{
var otherColor = figure.Color == FigureColor.White ? FigureColor.Black : FigureColor.White;
if (!this.ValidMove(move))
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
base.ValidateMove(figure, board, move);
}
public override void ValidateMove(IFigure figure, IBoard board, Move move)
{
if (!ValidCastleMove(figure, board, move))
{
if (!this.ValidKingMove(figure, board, move))
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
}
base.ValidateMove(figure, board, move);
}
public void ValidateMove(IFigure figure, IBoard board, Move move)
{
this.startRow = figure.Color == FigureColor.White ? board.Size - 2 : 1;
this.oppositeColor = figure.Color == FigureColor.White ? FigureColor.Black : FigureColor.White;
this.direction = (figure.Color == FigureColor.White) ? -1 : 1;
if (!this.ValidPLayerMoves(move, board))
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
base.ValidateMove(figure, board, move);
}
private bool ValidPLayerMoves(Move move, IBoard board)
{
var figureToPosition = board.SeeFigureOnPosition(move.To.Row, move.To.Col);
if (figureToPosition == null)
{
return this.ValidEmptyCellMoves(move, figureToPosition, board);
}
else if (figureToPosition.Color == this.oppositeColor)
{
if (move.From.Row + this.direction == move.To.Row && (move.From.Col - 1 == move.To.Col || move.From.Col + 1 == move.To.Col))
{
return true;
}
}
return false;
}
private void CheckIfToPositionSafeKing(IPlayer attacker, IFigure playFigure, Move move, IBoard gameBoard, Position kingPosition, IDictionary<Position, IFigure> defenderFigures)
{
var toFigure = gameBoard.SeeFigureOnPosition(move.To.Row, move.To.Col);
gameBoard.SetFigure(move.To.Row, move.To.Col, playFigure);
gameBoard.SetFigure(move.From.Row, move.From.Col, null);
kingPosition = this.FindKingPosition(attacker);
if (this.CheckIfCheck(gameBoard, kingPosition, defenderFigures))
{
gameBoard.SetFigure(move.To.Row, move.To.Col, toFigure);
gameBoard.SetFigure(move.From.Row, move.From.Col, playFigure);
throw new InvalidOperationException("Under Chess Save Your King!");
}
gameBoard.SetFigure(move.To.Row, move.To.Col, toFigure);
gameBoard.SetFigure(move.From.Row, move.From.Col, playFigure);
}
private bool ValidKingMove(IFigure figure, IBoard board, Move move)
{
var startRow = move.From.Row;
var startCol = move.From.Col;
for (int row = startRow - 1; row <= startRow + 1; row++)
{
for (int col = startCol - 1; col <= startCol + 1; col++)
{
if (move.To.Row == row && move.To.Col == col)
{
return true;
}
}
}
return false;
}
private bool ValidMove(Move move)
{
var counter = 0;
for (int i = 0; i < this.directions.Count; i++)
{
var directionRow = this.directions[i][0];
var directionCol = this.directions[i][1];
if (!this.CheckValidStep(move, directionRow, directionCol) && !this.CheckValidStep(move, directionRow * (-1), directionCol * (-1)))
{
counter++;
}
}
if (counter == this.directions.Count)
{
return false;
}
return true;
}
public override void ValidateMove(IFigure figure, IBoard board, Move move)
{
var rowDistance = Math.Abs(move.From.Row - move.To.Row);
var colDistance = Math.Abs(move.From.Col - move.To.Col);
if (rowDistance > 0 && colDistance > 0)
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
var rowDirection = move.From.Row < move.To.Row ? 1 : -1;
var colDirection = move.From.Col < move.To.Col ? 1 : -1;
rowDirection = rowDistance > 0 ? rowDirection : 0;
colDirection = colDistance > 0 ? colDirection : 0;
var row = move.From.Row;
var col = move.From.Col;
var finalRow = move.To.Row;// + (rowDirection * (-1));
var finalCol = move.To.Col;// + (colDirection * (-1));
while (true)
{
row += rowDirection;
col += colDirection;
if (board.SeeFigureOnPosition(row, col) != null)
{
throw new InvalidOperationException(string.Format(GlobalConstants.ExceptionMessege, figure.Type));
}
if (row == finalRow && col == finalCol)
{
break;
}
}
base.ValidateMove(figure, board, move);
}
private bool CheckCaslte(IFigure figure, IBoard board, Move move, FigureColor color, int row, int col, int startCheck, int endCheck)
{
if (figure.Color == color && move.To.Row == row && move.To.Col == col)
{
var rook = board.SeeFigureOnPosition(row, 0);
if (rook.Color == color && rook.IsFirstMove && figure.IsFirstMove)
{
for (int i = startCheck; i < endCheck; i++)
{
if (board.SeeFigureOnPosition(row, i) != null)
{
return false;
}
}
return true;
}
}
return false;
}
private bool ValidEmptyCellMoves(Move move, IFigure figure, IBoard board)
{
if (this.startRow == move.From.Row &&
move.From.Col == move.To.Col &&
move.From.Row + (2 * this.direction) == move.To.Row &&
board.SeeFigureOnPosition(move.From.Row + this.direction, move.From.Col) == null)
{
return true;
}
if (this.startRow == move.From.Row &&
move.From.Col == move.To.Col &&
move.From.Row + this.direction == move.To.Row)
{
return true;
}
if (move.From.Row + this.direction == move.To.Row && move.From.Col == move.To.Col && figure == null)
{
return true;
}
return false;
}
private void CheckValidMove(IFigure playFigure, ICollection<IMovement> availableMovements, Move move)
{
var validMove = false;
var fountExeprition = new Exception();
foreach (var movement in availableMovements)
{
try
{
movement.ValidateMove(playFigure, this.gameBoard, move);
validMove = true;
break;
}
catch (Exception ex)
{
fountExeprition = ex;
}
}
if (!validMove)
{
throw fountExeprition;
}
}
private void TakeDefenderFigure(IPlayer attacker, IPlayer defender, Move move, IBoard gameBoard)
{
var figure = gameBoard.SeeFigureOnPosition(move.To.Row, move.To.Col);
if (figure != null)
{
attacker.TakeFigure(move.To, figure, defender);
}
}
private void MoveRookCastle(Move move, IPlayer attacker)
{
var isLongCastle = move.From.Col > move.To.Col;
var rookRow = move.From.Row;
var rookFromCol = isLongCastle ? 0 : 7;
var rookToCol = isLongCastle ? move.From.Col - 1 : move.From.Col + 1;
var rook = this.gameBoard.SeeFigureOnPosition(rookRow, rookFromCol);
var rookFromPosition = new Position(rookRow, rookFromCol);
var rookToPosition = new Position(rookRow, rookToCol);
var rookMove = new Move(rookFromPosition, rookToPosition);
this.MoveFigures(rookMove, rook);
attacker.RemoveFigure(rookMove.From);
attacker.AddFigure(rookMove.To, rook);
}
private void MoveFigures(Move move, IFigure playFigure)
{
this.gameBoard.GetFigure(move.From.Row, move.From.Col);
this.gameBoard.SetFigure(move.To.Row, move.To.Col, playFigure);
}