using System;
using Org.BouncyCastle.Utilities;

namespace Org.BouncyCastle.Asn1.Cms;

public class KeyAgreeRecipientIdentifier : Asn1Encodable, IAsn1Choice
{
	private readonly IssuerAndSerialNumber issuerSerial;

	private readonly RecipientKeyIdentifier rKeyID;

	public IssuerAndSerialNumber IssuerAndSerialNumber => issuerSerial;

	public RecipientKeyIdentifier RKeyID => rKeyID;

	public static KeyAgreeRecipientIdentifier GetInstance(Asn1TaggedObject obj, bool isExplicit)
	{
		return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
	}

	public static KeyAgreeRecipientIdentifier GetInstance(object obj)
	{
		if (obj == null || obj is KeyAgreeRecipientIdentifier)
		{
			return (KeyAgreeRecipientIdentifier)obj;
		}
		if (obj is Asn1Sequence)
		{
			return new KeyAgreeRecipientIdentifier(IssuerAndSerialNumber.GetInstance(obj));
		}
		if (obj is Asn1TaggedObject && ((Asn1TaggedObject)obj).TagNo == 0)
		{
			return new KeyAgreeRecipientIdentifier(RecipientKeyIdentifier.GetInstance((Asn1TaggedObject)obj, explicitly: false));
		}
		throw new ArgumentException("Invalid KeyAgreeRecipientIdentifier: " + Platform.GetTypeName(obj), "obj");
	}

	public KeyAgreeRecipientIdentifier(IssuerAndSerialNumber issuerSerial)
	{
		this.issuerSerial = issuerSerial;
	}

	public KeyAgreeRecipientIdentifier(RecipientKeyIdentifier rKeyID)
	{
		this.rKeyID = rKeyID;
	}

	public override Asn1Object ToAsn1Object()
	{
		if (issuerSerial != null)
		{
			return issuerSerial.ToAsn1Object();
		}
		return new DerTaggedObject(explicitly: false, 0, rKeyID);
	}
}