using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace VEPROMS.CSLA.Library
{
    public static class EnumExtensions
    {
        // Take a flag enum and extract the cleaned string values.
        public static List<string> ToComparableStrings(this Enum eNum)
            => eNum.ToString()
                    .Split(',')
                    .Select(str => str.ToCleanString())
                    .ToList();

        // Take an individual enum and report the textual value.
        public static string ToComparableString(this Enum eNum)
            => eNum.ToString()
                   .ToCleanString();

        // Take an individual enum and report the integer values as a comma delimited string
        public static string ToCommaDelimString(this Enum eNum)
        {
            string retVal = string.Empty;

            if (!string.IsNullOrEmpty(eNum.ToString()))
            {
                foreach (Enum f in Enum.GetValues(eNum.GetType()))
                {
                    if (eNum.ToString().Contains(f.ToString()))
                    {
                        retVal = (string.IsNullOrEmpty(retVal)) ? Convert.ToInt32(f).ToString() : string.Concat(retVal, ",", Convert.ToInt32(f));
                    }
                }
            }

            return retVal;
        }

        // Remove any spaces due to split and if `_` found change it to space.
        public static string ToCleanString(this string str)
        {
            string retval = str;
            // B2022-114: ROs not printing in Word docs.  spaces were removed, but this should only happen in unit designators such
            //  as <U-OTHER NAME>.  Keep the code that replaces the '_' with a space.
            if (retval.ToUpper().StartsWith("<U-"))
            {
                retval = retval.Replace(" ", string.Empty);
            }
            retval = retval.Replace('_', ' ');
            return retval;
        }
    }
}