public Piece ShiftPiece(Piece piece, Square end)
{
var startPiece = piece.Clone() as Piece;
var endPiece = Squares.FirstOrDefault(x => x.Point.Equals(end.Point))?.Piece;
var saveEndPiece = endPiece?.Clone() as Piece;
Squares.FirstOrDefault(x => x.Point.Equals(end.Point)).Piece = Squares.FirstOrDefault(x => x.Point.Equals(piece.Point)).Piece;
Squares.FirstOrDefault(x => x.Point.Equals(startPiece.Point)).Piece = null;
return(saveEndPiece);
}
public Piece IsKingChecked(Color turn)
{
var enemyPieces = GetAllPiecesByColor(GetOtherColor(turn));
var playerKingSquare = Squares.FirstOrDefault(x => x.Point.Equals(GetKingByColor(turn).Point));
foreach (var enemyPiece in enemyPieces)
{
if (enemyPiece.CanBeMovedToSquare(playerKingSquare))
{
var dir = enemyPiece.ChooseRightDirection(playerKingSquare.Point);
if (!IsPieceBlocking(enemyPiece, playerKingSquare, dir))
{
return(enemyPiece);
}
}
}
return(null);
}
public List <Square[]> CanCastle(Piece start)
{
List <Square[]> square = new List <Square[]>();
if (!(start is King))
{
return(square);
}
var rooks = GetRookNearKing(start);
foreach (var rook in rooks)
{
if (start.IsFirstMove && rook.IsFirstMove)
{
var clone = Clone() as Board;
var dir = start.ChooseRightDirection(rook.Point);
var allMoves = start.Point.AllMovesWithinDirection(rook.Point, dir).Take(2);
if (allMoves.Count() < 2)
{
return(square);
}
Square s = null;
foreach (var move in allMoves)
{
var end = clone.Squares.FirstOrDefault(x => x.Point.Equals(move));
clone.ShiftPiece(clone.GetKingByColor(start.Color), end);
if (clone.IsKingChecked(start.Color) != null)
{
return(square);
}
}
square.Add(new Square[] { Squares.FirstOrDefault(x => x.Point.Equals(allMoves.ElementAt(1))), Squares.FirstOrDefault(x => x.Point.Equals(rook.Point)) });
}
}
return(square);
}
public List <Move> CalcPossibleMoves(Piece piece)
{
var res = new List <Move>();
foreach (var dir in piece.Directions)
{
var allMoves = piece.Point.AllMovesWithinDirection(dir);
foreach (var end in allMoves)
{
var square = Squares.FirstOrDefault(x => x.Point.Equals(end));
if (piece.CanMoveWithoutColliding(square, this))
{
var clonedBoard = PredictBoard(piece, square);
if (clonedBoard.IsKingChecked(piece.Color) == null)
{
var add = CanCastle(piece);
foreach (var castle in add)
{
if (!piece.CheckCollision(castle[0], this))
{
var cMove = new Castle(this, piece, castle[0], castle[1]);
cMove.OnInitiatePawnPromotion += Move_OnInitiatePawnPromotion;
cMove.OnPieceCaptured += Move_OnPieceCaptured;
res.Add(cMove);
}
}
var move = new Move(this, piece, square);
move.OnInitiatePawnPromotion += Move_OnInitiatePawnPromotion;
move.OnPieceCaptured += Move_OnPieceCaptured;
res.Add(move);
}
}
}
}
return(res);
}
public async Task ApplyMove(BoardPosition squarePosition)
{
var possibleMoves = _board.GetPossibleMoves() as IEnumerable <ChessMove>;
var selectedPiece = Squares.FirstOrDefault(s => s.IsSelected);
if (possibleMoves == null || selectedPiece == null)
{
return;
}
foreach (var move in possibleMoves)
{
// Since pawns are special
if (!move.StartPosition.Equals(selectedPiece.Position) ||
!move.EndPosition.Equals(squarePosition))
{
continue;
}
// Make a move
_board.ApplyMove(move);
break;
}
if (_board.NeedToPawnPromote)
{
var dialog = new PawnPromotionDialog(this);
dialog.ShowDialog();
possibleMoves = _board.GetPossibleMoves() as IEnumerable <ChessMove>;
_board.ApplyMove(possibleMoves?.FirstOrDefault(move => move.ToString().Contains(dialog.Piece)));
}
Debug.WriteLine($"have: {_board.MoveHistory.Count}");
RebindState();
Debug.WriteLine($"have: {_board.MoveHistory.Count}");
Debug.WriteLine("player moved");
if (Players == NumberOfPlayers.One && !_board.IsFinished)
{
Debug.WriteLine("making move");
var test = _board.CurrentPlayer;
var bestMove = await Task.Run(() => _ai.FindBestMove(_board));
Debug.WriteLine($"{test}-{_board.CurrentPlayer}");
if (bestMove != null)
{
Debug.WriteLine($"{bestMove}");
Debug.WriteLine("test");
_board.ApplyMove(bestMove);
if (_board.NeedToPawnPromote)
{
Debug.WriteLine("promoting pawn");
bestMove = await Task.Run(() => _ai.FindBestMove(_board));
if (bestMove != null)
{
_board.ApplyMove(bestMove);
}
}
}
}
Debug.WriteLine($"have: {_board.MoveHistory.Count}");
RebindState();
Debug.WriteLine($"have: {_board.MoveHistory.Count}");
Debug.WriteLine("ai moved");
}
public Square SquareAt(int row, int col)
{
return(Squares.FirstOrDefault(s => s.Row == row && s.Col == col));
}