using System;

using Org.BouncyCastle.Asn1.X509;

namespace Org.BouncyCastle.Asn1.Icao
{
	/**
	 * The CscaMasterList object. This object can be wrapped in a
	 * CMSSignedData to be published in LDAP.
	 *
	 * <pre>
	 * CscaMasterList ::= SEQUENCE {
	 *   version                CscaMasterListVersion,
	 *   certList               SET OF Certificate }
	 *   
	 * CscaMasterListVersion :: INTEGER {v0(0)}
	 * </pre>
	 */
	public class CscaMasterList 
		: Asn1Encodable 
	{
		private DerInteger version = new DerInteger(0);
		private X509CertificateStructure[] certList;

		public static CscaMasterList GetInstance(
			object obj)
		{
			if (obj is CscaMasterList)
				return (CscaMasterList)obj;

			if (obj != null)
				return new CscaMasterList(Asn1Sequence.GetInstance(obj));            

			return null;
		}

		private CscaMasterList(
			Asn1Sequence seq)
		{
			if (seq == null || seq.Count == 0)
				throw new ArgumentException("null or empty sequence passed.");

			if (seq.Count != 2)
				throw new ArgumentException("Incorrect sequence size: " + seq.Count);

			this.version = DerInteger.GetInstance(seq[0]);

			Asn1Set certSet = Asn1Set.GetInstance(seq[1]);

			this.certList = new X509CertificateStructure[certSet.Count];
			for (int i = 0; i < certList.Length; i++)
			{
				certList[i] = X509CertificateStructure.GetInstance(certSet[i]);
			}
		}

		public CscaMasterList(
			X509CertificateStructure[] certStructs)
		{
			certList = CopyCertList(certStructs);
		}

		public virtual int Version
		{
			get { return version.Value.IntValue; }
		}

		public X509CertificateStructure[] GetCertStructs()
		{
			return CopyCertList(certList);
		}

		private static X509CertificateStructure[] CopyCertList(X509CertificateStructure[] orig)
		{
			return (X509CertificateStructure[])orig.Clone();
		}

		public override Asn1Object ToAsn1Object() 
		{
			return new DerSequence(version, new DerSet(certList));
		}
	}
}