// /**
//  * File: PDU.cs
//  * Author: haraldwolff
//  *
//  * This file and it's content is copyrighted by the Author and / or copyright holder.
//  * Any use wihtout proper permission is illegal and may lead to legal actions.
//  *
//  *
//  **/
using System;
using System.IO;
using ln.snmp.asn1;
namespace ln.snmp.types
{
    public class PDU : AbstractSequence
    {
        public Integer RequestID { get; private set; }
        public Integer Error { get; private set; }
        public Integer ErrorIndex { get; private set; }

        public Sequence VarBinds { get; private set; }

        private Variable[] items;

        public PDU(Identifier identifier)
            : base(identifier)
        {
            //RequestID = new Integer(Environment.TickCount);
            RequestID = new Integer(0xDEADBEEF);
            Error = new Integer();
            ErrorIndex = new Integer();

            VarBinds = new Sequence();

            items = new Variable[] { RequestID, Error, ErrorIndex, VarBinds };
        }

        public PDU(ASN1Value value)
            : base(value.Identifier)
        {
            RequestID = (Integer)value.Items[0];

            Error = (Integer)value.Items[1];
            Error = (Integer)value.Items[2];
            VarBinds = (Sequence)value.Items[3];
        }

        public override Variable[] Items
        {
            get => items;
            set
            {
                RequestID = value[0] as Integer;
                Error = value[1] as Integer;
                ErrorIndex= value[2] as Integer;
                VarBinds = value[3] as Sequence;
            }
        }

        public override void Add(Variable item)
        {
            VarBinds.Add(item);
        }

        public override void Remove(Variable item)
        {
            VarBinds.Remove(item);
        }




    }

    public class GetRequest : PDU
    {
        public GetRequest() : base(new Identifier(IdentifierClass.CONTEXT, true, 0x00))
        {
        }
        public GetRequest(ASN1Value value)
            : base(value)
        { }

    }
    public class GetNextRequest : PDU
    {
        public GetNextRequest() : base(new Identifier(IdentifierClass.CONTEXT, true, 0x01))
        {
        }
        public GetNextRequest(ASN1Value value)
    : base(value)
        { }

    }
    public class GetResponse : PDU
    {
        public GetResponse() : base(new Identifier(IdentifierClass.CONTEXT, true, 0x02))
        {
        }
    //    public GetResponse(ASN1Value value)
    //: base(value)
        //{ }

    }
    public class GetBulkRequest : PDU
    {
        public Integer NonRepeaters => Error;
        public Integer MaxRepetitions => ErrorIndex;

        public GetBulkRequest() : base(new Identifier(IdentifierClass.CONTEXT, true, 0x05))
        {
            NonRepeaters.LongValue = 0;
            MaxRepetitions.LongValue = 32;
        }

    }
    public class SetRequest : PDU
    {
        public SetRequest() : base(new Identifier(IdentifierClass.CONTEXT, true, 0x03))
        {
        }

    }

    public class Report: PDU
    {
        public Report() : base(new Identifier(IdentifierClass.CONTEXT, true, 0x08))
        {
        }
    }


}