GameRules.cs

public class GameRules
{
    // Calculate winnings based on the bet, winning number, and winning color
    public int CalculateWinnings(Bet bet, int winningNumber, string winningColor)
    {
        // Split the bet type into its parts
        string[] betParts = bet.Type.ToLower().Split(' ');
        
        int betNumber;
        string betColor = null;

        // Check if the bet type consists of one part
        if (betParts.Length == 1)
        {
            // If the bet type is a number
            if (int.TryParse(betParts[0], out betNumber))
            {
                // Check if the bet number matches the winning number
                if (betNumber == winningNumber)
                {
                    // If the bet number matches, return the winnings (36 times the bet amount)
                    return bet.Amount * 36;
                }
            }
            // If the bet type is a color
            else if (betParts[0] == "red" || betParts[0] == "black")
            {
                // Assign the bet color
                betColor = betParts[0];
            }
        }
        // Check if the bet type consists of two parts
        else if (betParts.Length == 2)
        {
            // If the bet type is a number and a color
            if (int.TryParse(betParts[0], out betNumber) && (betParts[1] == "red" || betParts[1] == "black"))
            {
                // Assign the bet color
                betColor = betParts[1];
                // Check if the bet number and color match the winning number and color
                if (betNumber == winningNumber && betColor == winningColor.ToLower())
                {
                    // If the bet number and color match, return the winnings (36 times the bet amount)
                    return bet.Amount * 36;
                }
            }
        }

        // Check if the bet color matches the winning color
        if (betColor != null && betColor == winningColor.ToLower())
        {
            // If the bet color matches, return the winnings (2 times the bet amount)
            return bet.Amount * 2;
        }

        // If no winning condition is met, return 0
        return 0;
    }

    // Check if the bet type is valid
    public bool IsValidBetType(string betType)
    {
        // Split the bet type into its parts
        string[] betParts = betType.ToLower().Split(' ');
        // Check if the bet type consists of one part and is either a color or a number
        return (betParts.Length == 1 && (betParts[0] == "red" || betParts[0] == "black" || int.TryParse(betParts[0], out _))) ||
               // Check if the bet type consists of two parts and the first part is a number and the second part is a color
               (betParts.Length == 2 && int.TryParse(betParts[0], out _) && (betParts[1] == "red" || betParts[1] == "black"));
    }
}