using System;

public class Program

{

    public static void Main()

    {   

        DailyManager dm = new DailyManager( new DateTime( 2022, 05, 10, 05, 10, 15) );

        Console.Out.WriteLine( "can claim: " + dm.canClaim());

        Console.Out.WriteLine( "until next: " + dm.untilNext());

        Console.Out.WriteLine( "claim?: " + dm.claim());

        Console.Out.WriteLine( "can claim: " + dm.canClaim());

        Console.Out.WriteLine( "until next: " + dm.untilNext());

​

        DateTime dt = DateTime.Now;

    for (int i=0; i< 24; i++) {

        Console.Out.Write(i);

        Console.Out.WriteLine(": " + dt.AddHours(i));

    }

​

    }   

}

​

public class DailyManager {

    private DateTime nextClaim;

    public DailyManager(DateTime? asOfDate = null) {

        DateTime asOf = asOfDate ?? DateTime.Now;

        nextClaim = asOf.Date.AddHours(12);

    }

    public bool canClaim(DateTime? asOfDate = null) {

        DateTime asOf = asOfDate ?? DateTime.Now;

        return asOf > nextClaim;

    }

    public TimeSpan untilNext(DateTime? asOfDate = null) {

        DateTime asOf = asOfDate ?? DateTime.Now;

​

        if ( canClaim(asOf) ) { return new TimeSpan(0); }

        TimeSpan diff = nextClaim - asOf;

        return diff;

    }

    public bool claim(DateTime? asOfDate = null) {

        DateTime asOf = asOfDate ?? DateTime.Now;

​

        if ( !canClaim(asOf) ) { return false; }

        TimeSpan diff = asOf - nextClaim;

        Int64 daysPassed = diff.Days;

​

        nextClaim = nextClaim.AddDays(daysPassed+1);

        return true;

    }

}

​