using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Cms;

namespace Org.BouncyCastle.Cms
{
  public class Pkcs7ProcessableObject : CmsProcessable
  {
    public DerObjectIdentifier ContentType { get; }
    public Asn1Encodable Content { get; }

    public Pkcs7ProcessableObject(DerObjectIdentifier contentType, Asn1Encodable content)
    {
      ContentType = contentType;
      Content = content;
    }

    public void Write(Stream outStream)
    {
      using (var sw = new BinaryWriter(outStream))
      {
        if (Content is Asn1Sequence)
        {
          Asn1Sequence seq = Asn1Sequence.GetInstance(Content);

          foreach (Asn1Encodable enc in seq)
          {
            sw.Write(enc.ToAsn1Object().GetEncoded(Asn1Encodable.Der));
          }
        }
        else
        {
          byte[] encoded = Content.ToAsn1Object().GetEncoded(Asn1Encodable.Der);
          int index = 1;
          while ((encoded[index] & 0xff) > 127)
          {
            index++;
          }

          index++;
          sw.Write(encoded, index, encoded.Length - index);
        }
      }
    }

    public object GetContent() => Content;
  }
}