/// <summary>
/// Checks for X or 0 in every position of the array. Sets winner = 0 if full.
/// </summary>
/// <returns>true if the board is full</returns>
private bool IsFull()
{
for (int i = 0; i < gameBoard.GetBoardSize(); i++)
{
if (gameBoard.GetBoardValue(i).Equals(BoardValue.Empty))
{
return(false);
}
}
winner = 0;
return(true);
}
/// <summary>
/// Chooses randomly from the free positions in the array
/// </summary>
/// <returns></returns>
public int RandomMove()
{
List <int> freePositions = new List <int>();
for (int i = 0; i < GameBoard.GetBoardSize(); i++)
{
if (GameBoard.GetBoardValue(i).Equals(BoardValue.Empty))
{
freePositions.Add(i);
}
}
return(freePositions[random.Next(0, freePositions.Count)]);
}
private PlayerTurn CurrentTurn; // Describes which player's turn it is
public GameLogic(GameBoard board)
{
Board = board;
NumWinPieces = Board.GetBoardSize();
}
public WinState GetWinState()
{
FieldState LastPiece = FieldState.EMPTY;
int EqualPiecesInRow = 0;
// Check columns
for (int column = 0; column < Board.GetBoardSize(); column++)
{
for (int row = 0; row < Board.GetBoardSize(); row++)
{
if (LastPiece != Board.BoardState[column, row])
{
EqualPiecesInRow = 0;
}
LastPiece = Board.BoardState[column, row];
EqualPiecesInRow++;
if (EqualPiecesInRow == NumWinPieces && LastPiece != FieldState.EMPTY)
{
return(LastPiece == FieldState.X ? WinState.XWIN : WinState.OWIN);
}
}
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
}
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
// Check rows
for (int row = 0; row < Board.GetBoardSize(); row++)
{
for (int column = 0; column < Board.GetBoardSize(); column++)
{
if (LastPiece != Board.BoardState[column, row])
{
EqualPiecesInRow = 0;
}
LastPiece = Board.BoardState[column, row];
EqualPiecesInRow++;
if (EqualPiecesInRow == NumWinPieces && LastPiece != FieldState.EMPTY)
{
return(LastPiece == FieldState.X ? WinState.XWIN : WinState.OWIN);
}
}
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
}
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
// Check diagonals
for (int row = NumWinPieces - 1; row < Board.GetBoardSize(); row++)
{
for (int column = 0; column <= row; column++)
{
if (LastPiece != Board.BoardState[column, row - column])
{
EqualPiecesInRow = 0;
}
LastPiece = Board.BoardState[column, row - column];
EqualPiecesInRow++;
if (EqualPiecesInRow == NumWinPieces && LastPiece != FieldState.EMPTY)
{
return(LastPiece == FieldState.X ? WinState.XWIN : WinState.OWIN);
}
}
if (row > 0)
{
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
for (int column = Board.GetBoardSize() - 1; column >= row; column--)
{
if (LastPiece != Board.BoardState[column, row + (Board.GetBoardSize() - 1 - column)])
{
EqualPiecesInRow = 0;
}
LastPiece = Board.BoardState[column, row + (Board.GetBoardSize() - 1 - column)];
EqualPiecesInRow++;
if (EqualPiecesInRow == NumWinPieces && LastPiece != FieldState.EMPTY)
{
return(LastPiece == FieldState.X ? WinState.XWIN : WinState.OWIN);
}
}
}
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
}
// Check anti diagonals
for (int row = Board.GetBoardSize() - 1 - (NumWinPieces - 1); row >= 0; row--)
{
for (int column = 0; column <= Board.GetBoardSize() - 1 - row; column++)
{
if (LastPiece != Board.BoardState[column, row + column])
{
EqualPiecesInRow = 0;
}
LastPiece = Board.BoardState[column, row + column];
EqualPiecesInRow++;
if (EqualPiecesInRow == NumWinPieces && LastPiece != FieldState.EMPTY)
{
return(LastPiece == FieldState.X ? WinState.XWIN : WinState.OWIN);
}
}
if (row > 0)
{
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
for (int column = Board.GetBoardSize() - 1; column >= row; column--)
{
if (LastPiece != Board.BoardState[column, row + (Board.GetBoardSize() - 1 - column)])
{
EqualPiecesInRow = 0;
}
LastPiece = Board.BoardState[column, row + (Board.GetBoardSize() - 1 - column)];
EqualPiecesInRow++;
if (EqualPiecesInRow == NumWinPieces && LastPiece != FieldState.EMPTY)
{
return(LastPiece == FieldState.X ? WinState.XWIN : WinState.OWIN);
}
}
}
LastPiece = FieldState.EMPTY;
EqualPiecesInRow = 0;
}
return(Board.IsFull() ? WinState.DRAW : WinState.INGAME);
}
