/// <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);
}
private bool Check(int firstPos, int secondPos, int choice, BoardValue symbol)
{
if (GameBoard.GetBoardValue(firstPos).Equals(GameBoard.GetBoardValue(secondPos)) && GameBoard.GetBoardValue(firstPos).Equals(symbol))
{
if (GameBoard.GetBoardValue(choice).Equals(BoardValue.Empty))
{
return(true);
}
}
return(false);
}
/// <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)]);
}
public int NewTurn()
{
Thread.Sleep(2000);
if (!HasStarted) //The first move
{
HasStarted = true;
if (Symbol.Equals(BoardValue.X))
{
int temp = random.Next(0, 4);
return(CORNERS[temp]);
}
else
{
if (GameBoard.GetBoardValue(4).Equals(BoardValue.Empty)) //If the middle is free
{
return(4);
}
else
{
return(RandomMove());
}
}
}
int choice;
if (CheckForWinOrBlock(Symbol, out choice))//Check for win
{
return(choice);
}
if (Symbol.Equals(BoardValue.X))
{
if (CheckForWinOrBlock(BoardValue.O, out choice))//Check for block
{
return(choice);
}
}
else
{
if (CheckForWinOrBlock(BoardValue.X, out choice))//Check for block
{
return(choice);
}
}
return(RandomMove());
}
