/// <summary>
/// Computer tries a random empty spot
/// </summary>
/// <returns>True if successful</returns>
private bool TryFirstEmptySpot()
{
for (int boardPosition = 0; boardPosition < ComputerTicTacToeGame.TicTacToeBoard.Length; boardPosition++)
{
if (ComputerTicTacToeGame.TicTacToeBoard[boardPosition] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(boardPosition);
return(true);
}
}
return(false);
}
/// <summary>
/// Computer tries the Middle spot of the tic-tac-toe board
/// </summary>
/// <returns>True if successful</returns>
private bool TryMiddleSpot()
{
if (ComputerTicTacToeGame.TicTacToeBoard[4] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(4);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Computer tries the spot which is adjacent to the player
/// </summary>
/// <returns>True if successful</returns>
private bool TrySpotAdjacentToOpponent()
{
TicTacToeGame.TicTacToeToken opponentToken = FindOpponentToken();
for (int boardPosition = 0; boardPosition < ComputerTicTacToeGame.TicTacToeBoard.Length; boardPosition++)
{
if (ComputerTicTacToeGame.TicTacToeBoard[boardPosition] == opponentToken)
{
// Check to the right of the opponent
if (boardPosition != 8 && ComputerTicTacToeGame.TicTacToeBoard[boardPosition + 1] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(boardPosition + 1);
return(true);
}
// Check the left of the opponent
if (boardPosition != 0 && ComputerTicTacToeGame.TicTacToeBoard[boardPosition - 1] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(boardPosition - 1);
return(true);
}
// Check the below the opponent
if (boardPosition != 6 && boardPosition != 7 && boardPosition != 8 && ComputerTicTacToeGame.TicTacToeBoard[boardPosition + 3] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(boardPosition + 3);
return(true);
}
// Check the above the opponent
if (boardPosition != 0 && boardPosition != 1 && boardPosition != 2 && ComputerTicTacToeGame.TicTacToeBoard[boardPosition - 3] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(boardPosition - 3);
return(true);
}
}
}
return(false);
}
/// <summary>
/// The computer will either make a winning move or block on depending on the token passed
/// Can only block one winning move seen. If there are two then the player can win.
/// </summary>
/// <returns></returns>
private bool TryWinningMove(TicTacToeGame.TicTacToeToken token)
{
// Check top to bottom
if (ComputerTicTacToeGame.TicTacToeBoard[0] == token && ComputerTicTacToeGame.TicTacToeBoard[3] == token && ComputerTicTacToeGame.TicTacToeBoard[6] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(6);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[1] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[7] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(7);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[2] == token && ComputerTicTacToeGame.TicTacToeBoard[5] == token && ComputerTicTacToeGame.TicTacToeBoard[8] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(8);
return(true);
}
// Check bottom to top
if (ComputerTicTacToeGame.TicTacToeBoard[6] == token && ComputerTicTacToeGame.TicTacToeBoard[3] == token && ComputerTicTacToeGame.TicTacToeBoard[0] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(0);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[7] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[1] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(1);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[8] == token && ComputerTicTacToeGame.TicTacToeBoard[5] == token && ComputerTicTacToeGame.TicTacToeBoard[2] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(2);
return(true);
}
// Check right to left
if (ComputerTicTacToeGame.TicTacToeBoard[0] == token && ComputerTicTacToeGame.TicTacToeBoard[1] == token && ComputerTicTacToeGame.TicTacToeBoard[2] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(2);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[3] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[5] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(5);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[6] == token && ComputerTicTacToeGame.TicTacToeBoard[7] == token && ComputerTicTacToeGame.TicTacToeBoard[8] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(8);
return(true);
}
// Check left to right
if (ComputerTicTacToeGame.TicTacToeBoard[2] == token && ComputerTicTacToeGame.TicTacToeBoard[1] == token && ComputerTicTacToeGame.TicTacToeBoard[0] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(0);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[5] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[3] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(3);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[8] == token && ComputerTicTacToeGame.TicTacToeBoard[7] == token && ComputerTicTacToeGame.TicTacToeBoard[6] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(6);
return(true);
}
// Check diagonal starting from left
if (ComputerTicTacToeGame.TicTacToeBoard[0] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[8] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(8);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[8] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[0] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(0);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[8] == token && ComputerTicTacToeGame.TicTacToeBoard[0] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(4);
return(true);
}
// Check diagonal starting from right
if (ComputerTicTacToeGame.TicTacToeBoard[2] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[6] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(6);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[6] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == token && ComputerTicTacToeGame.TicTacToeBoard[2] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(2);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[6] == token && ComputerTicTacToeGame.TicTacToeBoard[2] == token && ComputerTicTacToeGame.TicTacToeBoard[4] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(4);
return(true);
}
// Check the middle sides
if (ComputerTicTacToeGame.TicTacToeBoard[0] == token && ComputerTicTacToeGame.TicTacToeBoard[6] == token && ComputerTicTacToeGame.TicTacToeBoard[3] == TicTacToeGame.TicTacToeToken.Empty)
{
ComputerMainWindow.PlaceTicTacToeToken(3);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[0] == token && ComputerTicTacToeGame.TicTacToeBoard[2] == token && ComputerTicTacToeGame.TicTacToeBoard[1] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(1);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[2] == token && ComputerTicTacToeGame.TicTacToeBoard[8] == token && ComputerTicTacToeGame.TicTacToeBoard[5] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(5);
return(true);
}
else if (ComputerTicTacToeGame.TicTacToeBoard[6] == token && ComputerTicTacToeGame.TicTacToeBoard[8] == token && ComputerTicTacToeGame.TicTacToeBoard[5] == TicTacToeGame.TicTacToeToken.Empty) // from the opposite direction
{
ComputerMainWindow.PlaceTicTacToeToken(7);
return(true);
}
return(false);
}