/* Copyright (C) 2014 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
 * 
 * You can redistribute this program and/or modify it under the terms of
 * the GNU Lesser Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 */
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using Utilities;

namespace SMBLibrary.NetBios
{
    /// <summary>
    /// [RFC 1002] 4.2.1.3. RESOURCE RECORD
    /// </summary>
    public class ResourceRecord
    {
        public string Name;
        public NameRecordType Type = NameRecordType.NB; // NB
        public ushort Class = 0x0001; // IN
        public uint TTL;
        // ushort DataLength
        public byte[] Data;

        public ResourceRecord()
        {
            Name = String.Empty;
            TTL = (uint)new TimeSpan(7, 0, 0, 0).TotalSeconds;
            Data = new byte[0];
        }

        public void WriteBytes(Stream stream)
        {
            WriteBytes(stream, null);
        }

        public void WriteBytes(Stream stream, int? nameOffset)
        {
            if (nameOffset.HasValue)
            {
                NetBiosUtils.WriteNamePointer(stream, nameOffset.Value);
            }
            else
            {
                byte[] encodedName = NetBiosUtils.EncodeName(Name, String.Empty);
                ByteWriter.WriteBytes(stream, encodedName);
            }
            BigEndianWriter.WriteUInt16(stream, (ushort)Type);
            BigEndianWriter.WriteUInt16(stream, Class);
            BigEndianWriter.WriteUInt32(stream, TTL);
            BigEndianWriter.WriteUInt16(stream, (ushort)Data.Length);
            ByteWriter.WriteBytes(stream, Data);
        }
    }
}