using System;
using System.Collections.Generic;

namespace Org.BouncyCastle.Asn1.Esf
{
    /// <remarks>
    /// RFC 3126: 4.2.2 Complete Revocation Refs Attribute Definition
    /// <code>
    /// OcspListID ::=  SEQUENCE {
    ///		ocspResponses	SEQUENCE OF OcspResponsesID
    /// }
    /// </code>
    /// </remarks>
    public class OcspListID
		: Asn1Encodable
	{
        public static OcspListID GetInstance(object obj)
        {
            if (obj == null)
                return null;
            if (obj is OcspListID ocspListID)
                return ocspListID;
            return new OcspListID(Asn1Sequence.GetInstance(obj));
        }

        public static OcspListID GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
            new OcspListID(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));

        public static OcspListID GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
            new OcspListID(Asn1Sequence.GetTagged(taggedObject, declaredExplicit));

        private readonly Asn1Sequence m_ocspResponses;

        private OcspListID(Asn1Sequence seq)
		{
			int count = seq.Count;
			if (count != 1)
				throw new ArgumentException("Bad sequence size: " + count, nameof(seq));

			m_ocspResponses = Asn1Sequence.GetInstance(seq[0]);
            m_ocspResponses.MapElements(OcspResponsesID.GetInstance); // Validate
        }

        public OcspListID(params OcspResponsesID[] ocspResponses)
		{
			if (ocspResponses == null)
				throw new ArgumentNullException(nameof(ocspResponses));

			m_ocspResponses = DerSequence.FromElements(ocspResponses);
		}

		public OcspListID(IEnumerable<OcspResponsesID> ocspResponses)
		{
			if (ocspResponses == null)
                throw new ArgumentNullException(nameof(ocspResponses));

            m_ocspResponses = DerSequence.FromVector(Asn1EncodableVector.FromEnumerable(ocspResponses));
		}

		public OcspResponsesID[] GetOcspResponses() => m_ocspResponses.MapElements(OcspResponsesID.GetInstance);

		public override Asn1Object ToAsn1Object() => new DerSequence(m_ocspResponses);
	}
}