RpgRoller/RpgRoller/Services/RolemasterRetryPolicy.cs

namespace RpgRoller.Services;

public static class RolemasterRetryPolicy
{
    public static int? ResolveAutoRetryBonus(int firstResult)
    {
        if (firstResult is >= 76 and <= 90)
            return 5;

        if (firstResult is >= 91 and <= 110)
            return 10;

        return null;
    }

    public static int? TryExtractRetryBonus(string? breakdown)
    {
        if (string.IsNullOrWhiteSpace(breakdown))
            return null;

        if (breakdown.Contains(RetryPlusFiveMarker, StringComparison.Ordinal))
            return 5;

        if (breakdown.Contains(RetryPlusTenMarker, StringComparison.Ordinal))
            return 10;

        return null;
    }

    public const string RetryPlusFiveMarker = "; retry(+5):";
    public const string RetryPlusTenMarker = "; retry(+10):";
}