using System;

namespace GostCryptography.Asn1.Ber
{
    [Serializable]
    public abstract class Asn1Choice : Asn1Type
    {
        [NonSerialized]
        private int _choiceId;

        [NonSerialized]
        protected Asn1Type Element;

        public virtual int ChoiceId => _choiceId;

        public abstract string ElemName { get; }

        public virtual Asn1Type GetElement()
        {
            return Element;
        }

        public virtual void SetElement(int choiceId, Asn1Type element)
        {
            _choiceId = choiceId;

            Element = element;
        }

        public override bool Equals(object value)
        {
            var choice = value as Asn1Choice;

            if (choice == null)
            {
                return false;
            }

            if (_choiceId != choice._choiceId)
            {
                return false;
            }

            return Element.Equals(choice.Element);
        }

        public override int GetHashCode()
        {
            return Element?.GetHashCode() ?? base.GetHashCode();
        }
    }
}