/// <summary>
/// Sets a random position on the board for the given player and returns the position it was set at.
/// </summary>
/// <param name="playerComputer"></param>
/// <param name="board"></param>
/// <returns></returns>
public int SetPosition(PlayerEnum.Player playerComputer, Dictionary <int, string> board, IEnumerable <IComputerMove> fallback)
{
for (int i = 1; i <= 9; i++)
{
var random = new Random().Next(i, 9);
if (board.TryGetValue(random, out string s))
{
if (s.Equals(string.Empty))
{
board[random] = playerComputer.ToString();
_logger.LogTrace($"Square={random}");
return(random);
}
}
}
if (board.Select(x => x.Value == string.Empty).Where(x => x == true).Any())
{
throw new Exception("Board SetPosition failed.");
}
else
{
return((int)GameStatus.GameDraw);
}
}
public int SetPosition(PlayerEnum.Player playerComputer, Dictionary <int, string> board, IEnumerable <IComputerMove> fallback)
{
/* BOARD SQUARES
* 1, 2, 3
* 4, 5, 6
* 7, 8, 9
*/
// high value board squares that allow x number of rows through/from them to win
// 5 - it allows for 4 rows
// 1,3,7,9 - they allow for 3 rows
// 2,4,6,8 - that remain only allow for 2 rows
var highValueSquareLists = new List <List <int> >()
{
new List <int>()
{
5
},
new List <int>()
{
1, 3, 7, 9
},
new List <int>()
{
2, 4, 6, 8
}
};
foreach (var highValueSquares in highValueSquareLists)
{
var randomHighValueSquares = highValueSquares.OrderBy(a => new Random().Next()).ToList();
foreach (var square in randomHighValueSquares)
{
if (board.TryGetValue(square, out string squareValue))
{
if (squareValue.Equals(string.Empty))
{
board[square] = playerComputer.ToString();
_logger.LogTrace($"Square={square}");
return(square);
}
}
}
}
// no potential winning rows, fallback to easy
return(fallback
.First(rule => rule
.IsMatch(ComputerLevel.Easy))
.SetPosition(playerComputer, board, fallback));
}