using System;
using Kreta.Ellenorzo.Domain.VN.Interfaces;

namespace Kreta.Ellenorzo.Domain.VN.Logic
{
    /// <summary>
    /// Author: Kovács Kornél (DevKornél) Created On: 2019.07.
    /// </summary>
    public static class UidLogic
    {
        public static T GetUid<T>(string uidRaw, Converter<string[], T> uidConverter) where T : class, IReadonlyUidRaw
        {
            if (string.IsNullOrWhiteSpace(uidRaw))
            {
                return null;
            }

            string[] compositeKey = uidRaw.Split(Constant.UidInnerDelimiter);

            T uid = uidConverter.Invoke(compositeKey);
            return uid;
        }

        public static string[] GetCompositeKeyElements(string uidRaw) => string.IsNullOrWhiteSpace(uidRaw) ? null : uidRaw.Split(Constant.UidInnerDelimiter);

        public static string Concat(params object[] compositeKeyElements)
        {
            for (int i = 0; i < compositeKeyElements.Length; i++)
            {
                if (compositeKeyElements[i] == null)
                {
                    compositeKeyElements[i] = Constant.UidNullValue;
                }
                else if (string.IsNullOrWhiteSpace(compositeKeyElements[i].ToString()))
                {
                    compositeKeyElements[i] = Constant.UidNanValue;
                }
            }

            return string.Join(Constant.UidInnerDelimiter.ToString(), compositeKeyElements);
        }
    }
}