using System;

namespace XGame.Framework.Network
{
    internal class MsgReceiver : IMsgReceiver
    {
        private IMsgReceiverListener _listener;
        private ISessionContext _context;
        public MsgReceiver(IMsgReceiverListener listener, ISessionContext context)
        {
            _listener = listener;
            _context = context;
        }


        //response 12
        //|<-			     	 Head  	 	                             ->|<-      Body      ->|	
        //| magic |  type | compress | encryption |0000|  seqID   | protoId| msglength|   msg   |
        //| 1byte |  2bit |   1bit   | 1bit       |4bit|  4byte   | 4byte  |  2byte   |  Nbyte  |
        //|   0   |           1                        | 2 3 4 5  | 6789   |  10 11   |         | 

        //push 8
        //|<-			     	 Head  	 	                  ->|<-       Body     ->|	
        //| magic |  type | compress | encryption |0000| protoId| msglength|   msg   |
        //| 1byte |  2bit |   1bit   | 1bit       |4bit| 4byte  |  2byte   |  Nbyte  |
        //|   0   |           1                        | 2345   |  6  7    |         |
        public void Receive(byte[] bytes, int headLen, int msgLen)
        {
            int type = bytes[1] >> 6;
            int compress = bytes[1] >> 5 & 0x1;
            int encryption = bytes[1] >> 4 & 0x1;
            int protoID = -1;
            int seqID = -1;
            NetLog.LogHexString($"[Net] headLen:{headLen} msgLen:{msgLen}\n解析前:", bytes, headLen, msgLen);
            if (bytes[0] != NetDefine.MAGIC)
            {
                Log.Error($"[Net] 协议版本错误. bytes:{bytes[0]} magic:{NetDefine.MAGIC}");
                return;
            }
            if (type != (int)MsgType.REQUEST)
            { //收到任何消息都算收到心跳应答
                _listener?.OnHeartbeatReceived();
            }
            switch ((MsgType)type)
            {
                case MsgType.HEART_BEAT:
                    NetLog.LogVerbose("[Net] 收到心跳应答消息.");
                    return;
                case MsgType.RESPONSE:
                    seqID = (bytes[2] << 24) + (bytes[3] << 16) + (bytes[4] << 8) + (bytes[5]);
                    protoID = (bytes[6] << 24) + (bytes[7] << 16) + (bytes[8] << 8) + (bytes[9]);
                    NetLog.LogVerbose($"[Net] [Response] protoid:{protoID} seqID:{seqID}");
                    if (seqID <= -1)
                    {
                        Log.Error(string.Format("[Net] seq:{0} HeadLen:{1} MsgLen:{2} 抛弃一条非客户端请求,服务端私自发送来的消息", seqID, headLen, msgLen));
                        return;
                    }
                    break;
                case MsgType.PUSH:
                    protoID = (bytes[2] << 24) + (bytes[3] << 16) + (bytes[4] << 8) + (bytes[5]);
                    NetLog.LogVerbose($"[Net] [Push] protoid:{protoID}");
                    break;
                default:
                    Log.Error($"[Net] MsgType未知的一条消息 type:{type}");
                    return;
            }
            //做解密
            if (encryption == 1)
            {
                try
                {
                    _context.Encryptor.Decrypt(ref bytes, ref headLen, ref msgLen);
                    NetLog.LogHexString($"[Net] type:{(MsgType)type} protoid:{protoID} seq:{seqID}\n<<<<<解密后>>>>>:", bytes, headLen, msgLen);
                }
                catch (Exception e)
                {
                    Log.Exception($"[Net] 解密 msg {protoID} 出错\n", e);
                    return;
                }

            }
            //做解压
            if (compress == 1)
            {
                try
                {
                    _context.Compressor.Decompress(ref bytes, ref headLen, ref msgLen);//新的buffer
                    NetLog.LogHexString($"[Net] type:{(MsgType)type} protoid:{protoID} seq:{seqID}\n■■■■■解压后■■■■■:", bytes, headLen, msgLen);
                }
                catch (Exception e)
                {
                    Log.Exception($"[Net] 解压 msg {protoID} 出错\n", e);
                    return;
                }
            }

            IMessage msg = null;// = _context.Generator.GetMessage(protoID);
            if (msgLen != 0)
            {
                _context.Serializer.Read(bytes, headLen, msgLen + headLen, protoID, out msg);
            }
            if (msg != null)
            {
                //if (msgLen != 0)
                //{
                //    try
                //    {
                //        msg.ParseFrom(bytes, headLen, msgLen + headLen);
                //        NetLog.LogVerbose($"[MsgReceiver] type:{(MsgType)type} protoid:{protoID} seq:{seqID}\n解析后:[{msg.GetType().Name}]{XJson.ToJson(msg)}");
                //    }
                //    catch (Exception e)
                //    {
                //        Log.Exception($"[Session] 解析 msg {protoID} Excep出错 可能是双端proto文件没有同步 还有可能是本服跨服proto不一致\n", e);
                //        return;
                //    }

                //}
                msg.InstanceID = seqID;

                if (msg.ProtocolID == NetDefine.CONN_PROTO_ID && msg.InstanceID == NetDefine.CONN_SEQ_ID)
                {
                    NetLog.LogVerbose($"[Net] type:{(MsgType)type} protoid:{protoID} seq:{seqID} process immediately!!!");
                    _context.Processer.Process(msg);//对握手这条立即处理。
                }
                else
                {
                    //var data = SessionThreadData.Acquire();
                    //data.EventType = type == (int)MsgType.PUSH ? ESessionCode.ProcessPush : ESessionCode.ProcessResponse;
                    //data.Context = msg;
                    NetLog.LogVerbose($"[Net] type:{(MsgType)type} protoid:{protoID} seq:{seqID} Enqueue wait to process");
                    _context.Synchronizer.Enqueue(msg);
                }
            }
            else
            {
                Log.Error($"[Net] protoid : {protoID} 取不到IMessage，可能是proto文件没有生成");
            }
        }

    }
}