using System;
using Org.BouncyCastle.Utilities;

namespace Org.BouncyCastle.Asn1.X509;

public class PrivateKeyUsagePeriod : Asn1Encodable
{
	private DerGeneralizedTime _notBefore;

	private DerGeneralizedTime _notAfter;

	public DerGeneralizedTime NotBefore => _notBefore;

	public DerGeneralizedTime NotAfter => _notAfter;

	public static PrivateKeyUsagePeriod GetInstance(object obj)
	{
		if (obj is PrivateKeyUsagePeriod)
		{
			return (PrivateKeyUsagePeriod)obj;
		}
		if (obj is Asn1Sequence)
		{
			return new PrivateKeyUsagePeriod((Asn1Sequence)obj);
		}
		if (obj is X509Extension)
		{
			return GetInstance(X509Extension.ConvertValueToObject((X509Extension)obj));
		}
		throw new ArgumentException("unknown object in GetInstance: " + Platform.GetTypeName(obj), "obj");
	}

	private PrivateKeyUsagePeriod(Asn1Sequence seq)
	{
		foreach (Asn1TaggedObject item in seq)
		{
			if (item.TagNo == 0)
			{
				_notBefore = DerGeneralizedTime.GetInstance(item, isExplicit: false);
			}
			else if (item.TagNo == 1)
			{
				_notAfter = DerGeneralizedTime.GetInstance(item, isExplicit: false);
			}
		}
	}

	public override Asn1Object ToAsn1Object()
	{
		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
		if (_notBefore != null)
		{
			asn1EncodableVector.Add(new DerTaggedObject(explicitly: false, 0, _notBefore));
		}
		if (_notAfter != null)
		{
			asn1EncodableVector.Add(new DerTaggedObject(explicitly: false, 1, _notAfter));
		}
		return new DerSequence(asn1EncodableVector);
	}
}