using System;

namespace Sony.Filtr.Utility
{
    public static class NewMusicFridayManager
    {
        public static DateTime GetPrecedingFriday(DateTime utcDate)
        {
            do
            {
                utcDate = utcDate.AddDays(-1);
            } while (utcDate.DayOfWeek != DayOfWeek.Friday);

            return utcDate;
        }

        public static DateTime GetPrecedingOrCurrentFriday(DateTime utcDate)
        {
            while (utcDate.DayOfWeek != DayOfWeek.Friday)
            {
                utcDate = utcDate.AddDays(-1);
            }

            return utcDate.Date;
        }

        public static DateTime GetNextOrCurrentFriday(DateTime utcDate)
        {
            while (utcDate.DayOfWeek != DayOfWeek.Friday)
            {
                utcDate = utcDate.AddDays(1);
            }

            return utcDate.Date;
        }

        public static DateTime GetLogicalFridayForImport(DateTime utcDate)
        {
            if (utcDate.DayOfWeek == DayOfWeek.Thursday)
                return GetNextOrCurrentFriday(utcDate);

            return GetPrecedingOrCurrentFriday(utcDate);
        }
    }
}