using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Utilities;

namespace Org.BouncyCastle.Asn1;

public class DerSequence : Asn1Sequence
{
	public static readonly DerSequence Empty = new DerSequence();

	public static DerSequence FromVector(Asn1EncodableVector v)
	{
		if (v.Count >= 1)
		{
			return new DerSequence(v);
		}
		return Empty;
	}

	public DerSequence()
		: base(0)
	{
	}

	public DerSequence(Asn1Encodable obj)
		: base(1)
	{
		AddObject(obj);
	}

	public DerSequence(params Asn1Encodable[] v)
		: base(v.Length)
	{
		foreach (Asn1Encodable obj in v)
		{
			AddObject(obj);
		}
	}

	public DerSequence(Asn1EncodableVector v)
		: base(v.Count)
	{
		foreach (Asn1Encodable item in v)
		{
			AddObject(item);
		}
	}

	internal override void Encode(DerOutputStream derOut)
	{
		MemoryStream memoryStream = new MemoryStream();
		DerOutputStream derOutputStream = new DerOutputStream(memoryStream);
		IEnumerator enumerator = GetEnumerator();
		try
		{
			while (enumerator.MoveNext())
			{
				Asn1Encodable obj = (Asn1Encodable)enumerator.Current;
				derOutputStream.WriteObject(obj);
			}
		}
		finally
		{
			IDisposable disposable = enumerator as IDisposable;
			if (disposable != null)
			{
				disposable.Dispose();
			}
		}
		Platform.Dispose(derOutputStream);
		byte[] bytes = memoryStream.ToArray();
		derOut.WriteEncoded(48, bytes);
	}
}