using System;

​

class Program

{

    static void Main()

    {

        DateTime sessionStart = new DateTime(2025, 1, 25, 11, 30, 0); // Session start time

        DateTime currentTime = new DateTime(2025, 1, 24, 11, 20, 0); // Current time

​

        string bookingLeadTimeUnit = "24HourDays"; // Unit of lead time, e.g., "CalendarDays" or "24HourDays"

        int bookingLeadTime = 1; // Lead time in the specified unit

​

        bool isAvailable = IsSessionAvailable(sessionStart, currentTime, bookingLeadTimeUnit, bookingLeadTime);

​

        Console.WriteLine($"Session is {(isAvailable ? "available" : "not available")} for booking.");

    }

​

    static bool IsSessionAvailable(DateTime sessionStart, DateTime currentTime, string leadTimeUnit, int leadTime)

    {

        if (leadTimeUnit == "CalendarDays")

        {

            // Check based on calendar days

            DateTime calendarDeadline = sessionStart.Date.AddDays(-leadTime);

            return currentTime.Date <= calendarDeadline;

        }

        else if (leadTimeUnit == "24HourDays")

        {

            // Check based on 24-hour days

            TimeSpan timeDifference = sessionStart - currentTime;

            return timeDifference.TotalHours >= leadTime * 24;

        }

        else

        {

            throw new ArgumentException("Invalid lead time unit. Use 'CalendarDays' or '24HourDays'.");

        }

    }

}

​