public void ApplyMovement(Piece piece, Square oldSquare, Square newSquare)
{
if (newSquare.Piece != null)
return;
PieceMovement movement = this.GetValidMovement(piece, oldSquare, newSquare);
if (movement == null)
return;
oldSquare.Piece = null;
newSquare.Piece = piece;
DrawingManager.Instance.DrawableObjects.Add(oldSquare);
DrawingManager.Instance.DrawableObjects.Add(newSquare);
piece.Selected = false;
if (movement.JumpPosition != null)
{
BoardPosition killPosition = oldSquare.BoardPosition + movement.JumpPosition;
Square killSquare = _draughts.Board[killPosition];
killSquare.Piece = null;
DrawingManager.Instance.DrawableObjects.Add(killSquare);
}
if (piece is CommonPiece && ((piece.BoardPosition.I == 7 && piece.Color == PieceColor.Black) ||
(piece.BoardPosition.I == 0 && piece.Color == PieceColor.White)))
{
newSquare.Piece = new QueenPiece(piece.Color, piece.BoardPosition);
if (this.PieceUpgraded != null)
this.PieceUpgraded(this, new PieceEventArgs(newSquare.Piece));
_draughts.ChangePlayer();
}
else
this.ChangePlayerIfNeeded(piece, movement);
this.CheckPlayerVictory();
}
public bool CheckIfCanMovePiece(Piece piece)
{
return piece.Color == _draughts.CurrentPlayer.Color;
}
private PieceMovement GetValidMovement(Piece piece, Square oldSquare, Square newSquare)
{
if (newSquare.Piece != null)
return null;
List<PieceMovement> pieceValidMovements = this.GetValidMovements(piece);
PieceMovement newMovement = pieceValidMovements.FirstOrDefault(m => (oldSquare.BoardPosition + m.BoardMovement).Equals(newSquare.BoardPosition));
if (newMovement == null)
return null;
if (newMovement.JumpPosition == null)
{
List<PieceMovement> allPiecesValidMovements = this.GetPlayerValidMovements(_draughts.CurrentPlayer);
return allPiecesValidMovements.FirstOrDefault(m => m.JumpPosition != null) == null ? newMovement : null;
}
else if (!(piece is QueenPiece))
{
if (this.CheckIfPlayerHasQueenJumpMovements())
return null;
}
return newMovement;
}
private List<PieceMovement> GetValidMovements(Piece piece)
{
List<PieceMovement> validMovements = new List<PieceMovement>();
foreach (var movement in piece.Movements)
{
Square movementSquare = _draughts.Board[piece.BoardPosition + movement.BoardMovement];
if (movementSquare != null)
{
if (movementSquare.Piece == null)
{
if (movement.JumpPosition != null)
{
Square jumpSquare = _draughts.Board[piece.BoardPosition + movement.JumpPosition];
if (jumpSquare != null && jumpSquare.Piece != null && jumpSquare.Piece.Color != piece.Color)
validMovements.Add(movement);
}
else
validMovements.Add(movement);
}
}
}
return validMovements;
}
private void ChangePlayerIfNeeded(Piece piece, PieceMovement lastMovement)
{
List<PieceMovement> validMovements = this.GetPlayerValidMovements(_draughts.CurrentPlayer);
PieceMovement jumpMovement = validMovements.FirstOrDefault(m => m.JumpPosition != null);
if (jumpMovement == null || lastMovement.JumpPosition == null)
_draughts.ChangePlayer();
}
public bool ValidateNewPosition(Piece piece, Square oldSquare, Square newSquare)
{
PieceMovement movement = this.GetValidMovement(piece, oldSquare, newSquare);
//newSquare.Invalid = movement == null;
if (movement == null)
return false;
return true;
}
public void UpdateValidSquares(Piece selectedPiece)
{
List<PieceMovement> movements = this.GetValidMovements(selectedPiece);
List<PieceMovement> allPiecesValidMovements = this.GetPlayerValidMovements(_draughts.CurrentPlayer);
foreach (PieceMovement movement in movements)
{
BoardPosition position = selectedPiece.BoardPosition + movement.BoardMovement;
Square square = _draughts.Board[position];
PieceMovement newMovement = movements.FirstOrDefault(m => (selectedPiece.BoardPosition + m.BoardMovement).Equals(square.BoardPosition));
if (newMovement == null)
continue;
if (newMovement.JumpPosition == null)
{
if (allPiecesValidMovements.FirstOrDefault(m => m.JumpPosition != null) != null)
continue;
}
else if (!(selectedPiece is QueenPiece))
{
if (this.CheckIfPlayerHasQueenJumpMovements())
continue;
}
square.Valid = true;
DrawingManager.Instance.DrawableObjects.Add(square);
}
}
private void PieceSelecting(object sender, CancelEventArgs e)
{
for (int i = 0; i < 8; i++)
for (int j = 0; j < 8; j++)
if (this._squares[i, j].Valid)
{
this._squares[i, j].Valid = false;
DrawingManager.Instance.DrawableObjects.Add(this._squares[i, j]);
}
Piece piece = sender as Piece;
if (RulesValidator.Instance.CheckIfCanMovePiece(piece))
{
this._selectedPiece = piece;
RulesValidator.Instance.UpdateValidSquares(piece);
}
else
{
this._selectedPiece = null;
e.Cancel = true;
}
}
public PieceEventArgs(Piece piece)
{
this._piece = piece;
}