using System.Collections.Generic;
using System.Linq;
using Dinah.Core;

namespace DataLayer
{
    public class Contributor
	{
		// Empty is a special case. use private ctor w/o validation
		public static Contributor GetEmpty() => new() { ContributorId = -1, Name = "" };

		// contributors search links are just name with url-encoding. space can be + or %20
		//   author search link:   /search?searchAuthor=Robert+Bevan
		//   narrator search link: /search?searchNarrator=Robert+Bevan
		// can also search multiples. concat with comma before url encode

		// id.s
		// ----
		// https://www.audible.com/author/Neil-Gaiman/B000AQ01G2 == https://www.audible.com/author/B000AQ01G2
		//     goes to summary page
		//     at bottom "See all titles by Neil Gaiman" goes to https://www.audible.com/search?searchAuthor=Neil+Gaiman
		// some authors have no id. simply goes to https://www.audible.com/search?searchAuthor=Rufus+Fears
		// all narrators have no id: https://www.audible.com/search?searchNarrator=Neil+Gaiman

		internal int ContributorId { get; private set; }
        public string Name { get; private set; }

        private HashSet<BookContributor> _booksLink;
        public IEnumerable<BookContributor> BooksLink => _booksLink?.ToList();

        public string AudibleContributorId { get; private set; }

        private Contributor() { }
        public Contributor(string name, string audibleContributorId = null)
        {
            Name = ArgumentValidator.EnsureNotNullOrWhiteSpace(name, nameof(name));

            _booksLink = new HashSet<BookContributor>();

			// don't overwrite with null or whitespace but not an error
			if (!string.IsNullOrWhiteSpace(audibleContributorId))
				AudibleContributorId = audibleContributorId;
		}

		public override string ToString() => Name;
	}
}