public void UndoChessMove(Position origin, Position destiny, Piece takenPiece)
{
Piece returnedPiece = Board.RemovePiece(destiny);
returnedPiece.DecreaseQtyMovement();
Board.AddressPiece(returnedPiece, origin);
if (takenPiece != null)
{
Board.AddressPiece(takenPiece, destiny);
CapturedPieces.Remove(takenPiece);
}
//Special move: Castling
//Short Castling
if (returnedPiece is King && destiny.Column == origin.Column + 2)
{
Position rookOrigin = new Position(origin.Line, origin.Column + 3);
Position rookDestiny = new Position(origin.Line, origin.Column + 1);
Piece movedRook = Board.RemovePiece(rookDestiny);
movedRook.DecreaseQtyMovement();
Board.AddressPiece(movedRook, rookOrigin);
}
//Long Castling
if (returnedPiece is King && destiny.Column == origin.Column - 2)
{
Position rookOrigin = new Position(origin.Line, origin.Column - 4);
Position rookDestiny = new Position(origin.Line, origin.Column - 1);
Piece movedRook = Board.RemovePiece(rookDestiny);
movedRook.DecreaseQtyMovement();
Board.AddressPiece(movedRook, rookOrigin);
}
//Special move: En passant
if (returnedPiece is Pawn)
{
if (origin.Column != destiny.Column && takenPiece == VulnerableToEnPassant)
{
Piece EnPassantCapture = Board.RemovePiece(destiny);
Position EnPassantReturnPosition;
if (returnedPiece.Color == Color.White)
{
EnPassantReturnPosition = new Position(3, destiny.Column);
}
else
{
EnPassantReturnPosition = new Position(4, destiny.Column);
}
Board.AddressPiece(EnPassantCapture, EnPassantReturnPosition);
}
}
}
