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

namespace Kreta.Ellenorzo.Domain.VN.UniqueIdentifier
{
    [Serializable]
    public sealed class TantargyUid : IReadonlyUidRaw, IEqualityComparer<TantargyUid>, IEquatable<TantargyUid>
    {
        public TantargyUid(int id)
        {
            Id = id;
            UidRaw = id.ToString();
        }

        public TantargyUid(string uidRaw)
        {
            // Magatartás, Szorgalom tantárgyak miatt van 0-ás Id
            Id = int.TryParse(uidRaw, out int result) ? result : 0;
            UidRaw = uidRaw;
        }

        public TantargyUid()
        {

        }

        public int Id { get; private set; }

        public string UidRaw { get; private set; }

        public bool Equals(TantargyUid x, TantargyUid y) => x == y || x.UidRaw == y.UidRaw;

        public bool Equals(TantargyUid y) => this == y || UidRaw == y.UidRaw;

        public int GetHashCode(TantargyUid obj) => obj.UidRaw.GetHashCode();
    }
}