/*
 Sog 游戏基础库
 2016 by zouwei
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

using Sog;
using Sog.Gate;

namespace Gate
{
    //处理和后端服务器的通信消息
    public class ServerMsgTrans : BaseReloadableService
    {
        private ServerApp m_app;

        private uint m_backendserverseq = 0;

        public override int GetServiceType()
        {
            return (int)GateServiceType.ServerMsgTrans;
        }

        public override void Dispose()
        {
            m_app = null;
        }

        public ServerMsgTrans(ServerApp app)
        {
            m_app = app;
        }

        public void NotifyServerClientDisconnected(long sessionId, uint logicSvrId)
        {
            GateMsgHeader gateHeader;

            gateHeader.OpCode = (int)GateMsgOpCode.DisconnectedReq;
            gateHeader.SessionID = sessionId;

            NotifyServer(logicSvrId, gateHeader);
        }
         
        public void NotifyServerClientConnected(GateClientInfo info, GateClientConnectedReq req)
        {
            uint serverID = GateServerUtils.GetServerRoute().SelectBackEndServerID(info);

            if (serverID == 0)
            {
                TraceLog.Error("get route SelectBackEndServerID 0 invalid,session id {0}", info.SessionID);
                return;
            }

            GateMsgHeader gateHeader;

            gateHeader.OpCode = (int)GateMsgOpCode.ConnectedReq;
            gateHeader.SessionID = info.SessionID;
            byte[] headerBytes = GateMsgHeaderPacker.Pack(ref gateHeader);
            byte[] reqBytes = req.Pack();

            MessageData newMessage = new MessageData();
            newMessage.Header.Type = (int)SpecialMessageType.GateMsgHeaderType;
            newMessage.Header.Length = reqBytes.Length + headerBytes.Length;
            newMessage.Header.ObjectID = info.SessionID;
            newMessage.Header.ServerID = 0;
            //newMessage.Data = new byte[newMessage.Header.Length];
            newMessage.MallocData(newMessage.Header.Length);

            Buffer.BlockCopy(headerBytes, 0, newMessage.Buffer.Data, 0, headerBytes.Length);
            Buffer.BlockCopy(reqBytes, 0, newMessage.Buffer.Data, headerBytes.Length, reqBytes.Length);

            m_app.GetCluster().Send(serverID, newMessage);
        }

        public void NotifyServer(uint serverID, GateMsgHeader gateHeader)
        {
            MessageData message = new MessageData();

            message.Header.Length = GateMsgHeaderPacker.GetLength();
            message.Header.Type = (int)SpecialMessageType.GateMsgHeaderType;
            message.Header.ObjectID = gateHeader.SessionID;
            message.Header.ServerID = 0;
            message.MallocData(GateMsgHeaderPacker.GetLength());
            GateMsgHeaderPacker.Pack(ref gateHeader, message.Buffer.Data);

            m_app.GetCluster().Send(serverID, message);
        }

        public void TransClientMessageToServer(GateClientInfo info, MessageData message)
        {
            GateMsgHeader gateHeader;

            gateHeader.OpCode = (int)GateMsgOpCode.Trans;
            gateHeader.SessionID = info.SessionID;
            byte[] headerBytes = GateMsgHeaderPacker.Pack(ref gateHeader);

            MessageData newMessage = new MessageData();
            newMessage.Header.Type = message.Header.Type;
            newMessage.Header.Length = message.Header.Length + headerBytes.Length;
            newMessage.Header.ObjectID = info.SessionID;
            newMessage.Header.ServerID = 0;
            //newMessage.Data = new byte[newMessage.Header.Length];
            newMessage.MallocData(newMessage.Header.Length);

            Buffer.BlockCopy(headerBytes,0, newMessage.Buffer.Data,0, headerBytes.Length);
            Buffer.BlockCopy(message.Buffer.Data, 0, newMessage.Buffer.Data, headerBytes.Length, message.Buffer.Length);

            m_app.GetCluster().Send(info.LinkServerID, newMessage);
        }

        public void NotifyServerClientCount(int count)
        {
            GateMsgHeader gateHeader;

            gateHeader.OpCode = (int)GateMsgOpCode.ClientCount;
            gateHeader.SessionID = count;

            //随机选一台就行
            int backEndType = GateServerUtils.GetServerConfig().backEndServerType;

            uint[] serverIDs = m_app.GetCluster().GetRemoteAppID(backEndType);

            int index = (int)(m_backendserverseq % serverIDs.Length);

            m_backendserverseq++;

            NotifyServer(serverIDs[index], gateHeader);
        }
    }
}