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/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

     AUTHOR:       John DiCamillo


     OVERVIEW
     ========
     Network Link for Remote Player
*/


#ifndef NetLink_h
#define NetLink_h

#include <mutex>

#include <windows.h>
#include "NetAddr.h"
#include "NetSock.h"
#include "List.h"

// +-------------------------------------------------------------------+

class NetGram;
class NetMsg;
class NetPeer;

// +-------------------------------------------------------------------+

class NetLink
{
public:
    static const char* TYPENAME() { return "NetLink"; }

    NetLink();
    NetLink(NetAddr& a);
    virtual ~NetLink();

    int operator == (const NetLink& that) const { return this == &that; }

    const NetAddr&    GetAddress() const { return addr;  }

    DWORD             AddPeer(const char* a, WORD p=12345);
    DWORD             AddPeer(DWORD       a, WORD p=12345);
    DWORD             AddPeer(const NetAddr& a);

    bool              SendMessage(DWORD nid, void* d, int l, BYTE f=0);
    bool              SendMessage(DWORD nid, BYTE type, const char* text, int len, BYTE f=0);
    bool              SendMessage(NetMsg* msg);

    NetMsg*           GetMessage();
    NetMsg*           GetMessage(DWORD netid);

    virtual void      Shutdown();
    DWORD             DoSendRecv();

    DWORD             GetResendInterval()     const { return resend_time;   }
    void              SetResendInterval(DWORD t)    { resend_time = t;      }
    DWORD             GetTrafficInterval()    const { return traffic_time;  }
    void              SetTrafficInterval(DWORD t)   { traffic_time = t;     }

    DWORD             GetPacketsSent()        const { return packets_sent;  }
    DWORD             GetPacketsRecv()        const { return packets_recv;  }
    DWORD             GetBytesSent()          const { return bytes_sent;    }
    DWORD             GetBytesRecv()          const { return bytes_recv;    }
    DWORD             GetRetries()            const { return retries;       }
    DWORD             GetDrops()              const { return drops;         }
    DWORD             GetLag()                const { return lag;           }

    NetPeer*          FindPeer(const NetAddr& a);
    NetPeer*          FindPeer(DWORD netid);

protected:
    void              SendNetGram(NetGram* g);
    NetGram*          RecvNetGram();
    void              AckNetGram(NetGram* gram);
    void              ProcessAck(NetGram* gram);
    void              QueueNetGram(NetGram* gram);

    void              ReadPackets();
    void              SendPackets();
    void              DoRetries();

    NetAddr           addr;
    NetSock           sock;
    List<NetGram>     send_list;
    List<NetMsg>      recv_list;
    List<NetPeer>     peer_list;

    HANDLE            hnet;
    bool              shutdown;
    std::mutex        sync;

    DWORD             resend_time;
    DWORD             traffic_time;

    DWORD             packets_sent;
    DWORD             packets_recv;
    DWORD             bytes_sent;
    DWORD             bytes_recv;
    DWORD             retries;
    DWORD             drops;
    DWORD             lag;

    DWORD             lag_samples[10];
    int               lag_index;
};


#endif  // NetLink_h