/** This takes a string and returns the Player's piece that's name equals the string
* @param a_pieceString - The string we are matching to a piece
* @returns The piece that's name matches the string
* @author Thomas Hooper
* @date August 2019
*/
public Piece ReturnPieceFromString(string a_pieceString)
{
return(Pieces.Find(x => x.Name.Equals(a_pieceString)));
}
/** This method generates all the possible moves the player is able to make
* It goes through each piece and their valid squares and determines if it can
* make each move for each piece and square. It also evaluates if the piece can capture,
* castle or en passant
* @param a_player - The opposing player
* @param a_board - The board the game is played on
* @param a_previousMove - the previous move that was played
* @author Thomas Hooper
* @date July 2019
*/
public void GenerateMoves(Player a_player, Board a_board, Move a_previousMove)
{
List <Move> moves = new List <Move>();
foreach (Piece p in Pieces)
{
foreach (BoardSquare s in p.ValidSquares)
{
#region Just Moving
if (!s.Occupied)
{
moves.Add(new Move(s, p));
}
#endregion
#region Capturing
else
{
if (a_player.Pieces.Exists(x => x.Row == s.Row && x.Column == s.Column)) //BoardSquare Color
{
if (p.AttackingSquares.Exists(x => x.Row == s.Row && x.Column == s.Column) && s.PieceColor != p.Color)
{
Piece capturedPiece = a_player.Pieces.Find(x => x.Row == s.Row && x.Column == s.Column);
moves.Add(new Move(s, p, capturedPiece));
}
}
}
#endregion
}
}
#region En Passant
if (a_previousMove != null)
{
if (a_previousMove.MovingPiece is Pawn && (a_previousMove.MovingPiece.Row == 3 || a_previousMove.MovingPiece.Row == 4))
{
if (Pieces.Exists(x => x is Pawn && x.Row == a_previousMove.MovingPiece.Row))
{
if (a_previousMove.MovingPiece.Color == Color.White && a_previousMove.MovingPiece.Row == 4)
{
if (a_previousMove.OriginalSquare.Row == 6)
{
List <Piece> pawns = Pieces.FindAll(x => x.Row == 4);
foreach (Piece p in pawns)
{
if (Math.Abs(p.Column - a_previousMove.MovingPiece.Column) == 1)
{
BoardSquare square = a_board.ReturnSquare(a_previousMove.OriginalSquare.Row + 1, a_previousMove.OriginalSquare.Column);
moves.Add(new Move(square, p)
{
EnPassant = true
});
}
}
}
}
else if (a_previousMove.MovingPiece.Color == Color.Black && a_previousMove.MovingPiece.Row == 3)
{
if (a_previousMove.OriginalSquare.Row == 1)
{
List <Piece> pawns = Pieces.FindAll(x => x.Row == 3);
foreach (Piece p in pawns)
{
if (Math.Abs(p.Column - a_previousMove.MovingPiece.Column) == 1)
{
BoardSquare square = a_board.ReturnSquare(a_previousMove.OriginalSquare.Row - 1, a_previousMove.OriginalSquare.Column);
moves.Add(new Move(square, p)
{
EnPassant = true
});
}
}
}
}
}
}
}
#endregion
#region Castling
King k = (King)Pieces.Find(x => x is King);
if (!k.HasMoved && !Check)
{
BoardSquare s1 = new BoardSquare();
BoardSquare s2 = new BoardSquare();
BoardSquare s3 = new BoardSquare();
if (Pieces.Exists(x => x is Rook && !x.HasMoved && x.Column == 7))
{
Rook r = (Rook)Pieces.Find(x => x is Rook && !x.HasMoved && x.Column == 7);
s1 = a_board.ReturnSquare(k.Row, k.Column + 1);
s2 = a_board.ReturnSquare(k.Row, k.Column + 2);
if (!s1.Occupied && !s2.Occupied)
{
moves.Add(new Move(s2, k, r, true));
}
}
if (Pieces.Exists(x => x is Rook && !x.HasMoved && x.Column == 0))
{
Rook r = (Rook)Pieces.Find(x => x is Rook && !x.HasMoved && x.Column == 0);
s1 = a_board.ReturnSquare(k.Row, k.Column - 1);
s2 = a_board.ReturnSquare(k.Row, k.Column - 2);
s3 = a_board.ReturnSquare(k.Row, k.Column - 3);
if (!s1.Occupied && !s2.Occupied && !s3.Occupied)
{
moves.Add(new Move(s2, k, r, true));
}
}
}
#endregion
Moves = moves;
}
