// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
using System;
using SharpCifs.Util.Sharpen;

namespace SharpCifs.Netbios
{
    internal class NodeStatusResponse : NameServicePacket
    {
        private NbtAddress _queryAddress;

        private int _numberOfNames;

        private byte[] _macAddress;

        private byte[] _stats;

        internal NbtAddress[] AddressArray;

        internal NodeStatusResponse(NbtAddress queryAddress)
        {
            this._queryAddress = queryAddress;
            RecordName = new Name();
            _macAddress = new byte[6];
        }

        internal override int WriteBodyWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int ReadBodyWireFormat(byte[] src, int srcIndex)
        {
            return ReadResourceRecordWireFormat(src, srcIndex);
        }

        internal override int WriteRDataWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int ReadRDataWireFormat(byte[] src, int srcIndex)
        {
            int start = srcIndex;
            _numberOfNames = src[srcIndex] & unchecked(0xFF);
            int namesLength = _numberOfNames * 18;
            int statsLength = RDataLength - namesLength - 1;
            _numberOfNames = src[srcIndex++] & unchecked(0xFF);
            // gotta read the mac first so we can populate addressArray with it
            Array.Copy(src, srcIndex + namesLength, _macAddress, 0, 6);
            srcIndex += ReadNodeNameArray(src, srcIndex);
            _stats = new byte[statsLength];
            Array.Copy(src, srcIndex, _stats, 0, statsLength);
            srcIndex += statsLength;
            return srcIndex - start;
        }

        private int ReadNodeNameArray(byte[] src, int srcIndex)
        {
            int start = srcIndex;
            AddressArray = new NbtAddress[_numberOfNames];
            string n;
            int hexCode;
            string scope = _queryAddress.HostName.Scope;
            bool groupName;
            int ownerNodeType;
            bool isBeingDeleted;
            bool isInConflict;
            bool isActive;
            bool isPermanent;
            int j;
            bool addrFound = false;
            try
            {
                for (int i = 0; i < _numberOfNames; srcIndex += 18, i++)
                {
                    for (j = srcIndex + 14; src[j] == unchecked(0x20); j--)
                    {
                    }
                    n = Runtime.GetStringForBytes(src, srcIndex, j - srcIndex + 1, Name.OemEncoding
                        );
                    hexCode = src[srcIndex + 15] & unchecked(0xFF);
                    groupName = ((src[srcIndex + 16] & unchecked(0x80)) == unchecked(0x80))
                                    ? true
                                    : false;
                    ownerNodeType = (src[srcIndex + 16] & unchecked(0x60)) >> 5;
                    isBeingDeleted = ((src[srcIndex + 16] & unchecked(0x10)) == unchecked(0x10))
                                    ? true
                                    : false;
                    isInConflict = ((src[srcIndex + 16] & unchecked(0x08)) == unchecked(0x08))
                                    ? true
                                    : false;
                    isActive = ((src[srcIndex + 16] & unchecked(0x04)) == unchecked(0x04))
                                    ? true
                                    : false;
                    isPermanent = ((src[srcIndex + 16] & unchecked(0x02)) == unchecked(0x02))
                                    ? true
                                    : false;
                    if (!addrFound
                        && _queryAddress.HostName.HexCode == hexCode
                        && (_queryAddress.HostName == NbtAddress.UnknownName
                            || _queryAddress.HostName.name.Equals(n)))
                    {
                        if (_queryAddress.HostName == NbtAddress.UnknownName)
                        {
                            _queryAddress.HostName = new Name(n, hexCode, scope);
                        }
                        _queryAddress.GroupName = groupName;
                        _queryAddress.NodeType = ownerNodeType;
                        _queryAddress.isBeingDeleted = isBeingDeleted;
                        _queryAddress.isInConflict = isInConflict;
                        _queryAddress.isActive = isActive;
                        _queryAddress.isPermanent = isPermanent;
                        _queryAddress.MacAddress = _macAddress;
                        _queryAddress.IsDataFromNodeStatus = true;
                        addrFound = true;
                        AddressArray[i] = _queryAddress;
                    }
                    else
                    {
                        AddressArray[i] = new NbtAddress(new Name(n, hexCode, scope),
                                                         _queryAddress.Address,
                                                         groupName,
                                                         ownerNodeType,
                                                         isBeingDeleted,
                                                         isInConflict,
                                                         isActive,
                                                         isPermanent,
                                                         _macAddress);
                    }
                }
            }
            catch (UnsupportedEncodingException)
            {
            }
            return srcIndex - start;
        }

        public override string ToString()
        {
            return "NodeStatusResponse[" + base.ToString() + "]";
        }
    }
}