/*
 Sog 游戏基础库
 2016 by zouwei
 */

using System;
using System.Net;
using System.Text;
using Sproto;

namespace Sog
{
    
    public class SProtoPacker : IProtoPacker
    {
        //private SprotoRpc client;
        private SprotoRpc service;
        //private SprotoRpc.RpcRequest clientRequest;

        public SProtoPacker()
        {
            //client = new SprotoRpc();
            service = new SprotoRpc();
        }

        public int GetHeaderLength()
        {
            return 2;
        }

        public int GetFullHeaderLength()
        {
            return 2;
        }

        //打包头
        public int PackHeader(MessageHeader header, byte[] headerBytes)
        {
            byte[] tmpbytes = BitConverter.GetBytes((ushort)header.Length);

            headerBytes[0] = tmpbytes[1];
            headerBytes[1] = tmpbytes[0];

            return 2;
        }

        //解包头
        public int UnPackHeader(byte[] data, int offset, int length, ref MessageHeader header)
        {
            //注意 sproto 的字节序 ...
            int byte0 = data[offset + 1];
            int byte1 = data[offset + 0];


            header.Length  = byte1 * 256 + byte0;
            header.Type = 0;
            header.ObjectID = 0;

            return 2;
        }

        public virtual bool UnpackMessage(MessageData message, out RequestPacket packet)
        {
            try
            {
                SprotoRpc.RpcInfo rpcInfo = service.Dispatch(message.Buffer.Data);

                TraceLog.Trace("recv package(type {0}) tag {1} session {2} ", rpcInfo.tag, rpcInfo.session, rpcInfo.type);
                int msgId = rpcInfo.tag == null ? 0 : (int)rpcInfo.tag;
                uint seqId = rpcInfo.session == null ? 0 : (uint)rpcInfo.session;

                packet = new RequestPacket(msgId, seqId, 0);
                packet.Message = rpcInfo;

                return true;

            }
            catch(Exception error)
            {
                TraceLog.Error("sproto decode package error, {0}", error.Message);
                packet = null;

            }
          
            return false;
        }

        public virtual bool PackMessage(RequestPacket packet, ref MessageData message)
        {
            return false;
        }

        public void RegisterProtoType(int iMsgID, object obj)
        {
            //MessageParser
        }
    }
}