//========= Copyright © Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
//=============================================================================//

#ifndef HLTVBROADCAST_HDR
#define HLTVBROADCAST_HDR
#ifdef _WIN32
#pragma once
#endif

#include <filesystem.h>
//#include "demo.h"
#include "broadcast.h"
#include "tier0/microprofiler.h"
#include "tier1/utlincrementalvector.h"
#include "steam/steam_api.h"
#include "steam/isteamhttp.h"

class CHLTVFrame;
class CHLTVServer;

class CEngineGotvSyncPacket;	// forward declare protobuf message here



class CHLTVBroadcast
{
protected:
	class CMemoryStream
	{
	protected:
		CUtlMemory< uint8 > m_Buffer; // data chunk that will get uploaded
		uint m_nCommitted; // the number of bytes in payload buffer that will need to be uploaded
		uint8 *m_pReserved;
		// the total number of bytes allocated in payload buffer includes committed portion + reserved portion that is being filled in right now. m_pPayloadReserved == NULL after upload, otherwise we forgot to commit.

	public:
		CMemoryStream();
		void *Reserve( uint nReserveBytes );
		const void *GetReservedBase()const { return m_Buffer.Base() + m_nCommitted; }
		const void *Base()const { return m_Buffer.Base(); }
		uint GetReservedSize()const { return m_Buffer.Count() - m_nCommitted; }
		void Commit( uint nCommitBytes );
		void Purge();
		bool IsEmpty()const { return m_nCommitted == 0; }
		uint GetCommitSize()const { return m_nCommitted; }
		void Reset() { m_nCommitted = 0; }
		void WriteCmdHeader( unsigned char cmd, int tick, int nPlayerSlot );
	};

	class CInStreamMsg : public bf_write
	{
	protected:
		CMemoryStream &m_Stream;
		// int m_nCmd;
		// int m_nTick;
		// int m_nPlayerSlot,
	public:
		CInStreamMsg( CMemoryStream &stream, const char *pDebugName, uint nReserveSize = 256 * 1024 ) :
			m_Stream( stream ),
			bf_write( pDebugName, stream.Reserve(nReserveSize), nReserveSize )
		{

		}
		~CInStreamMsg()
		{
			m_Stream.Commit( GetNumBytesWritten() );
		}
	};

	class CInStreamMsgWithSize : public CInStreamMsg
	{
	protected:
	public:
		CInStreamMsgWithSize( CMemoryStream &stream, const char *pDebugName, uint nReserveSize = 256 * 1024 ) :
			CInStreamMsg( stream, pDebugName, nReserveSize )
		{
			this->WriteLong( 0 ); // we'll write this in the end
		}
		~CInStreamMsgWithSize()
		{
			// the length of the message, after the initial 4 bytes that contain the length of the message. Binarily compatible with .dem file
			*( int32* )( this->GetBasePointer() ) = this->GetNumBytesWritten() - sizeof( int32 ); 
		}
	};

	class CHttpCallback : public CCallbackBase
	{
	public:
		CHttpCallback( CHLTVBroadcast *pParent, HTTPRequestHandle hRequest, const char *pResource );
		~CHttpCallback();
		virtual void Run( void *pvParam ) OVERRIDE; // success; HTTPRequestCompleted_t
		virtual void Run( void *pvParam, bool bIOFailure, SteamAPICall_t hSteamAPICall ) OVERRIDE; // result; HTTPRequestCompleted_t
		void DetachFromParent() { m_pParent = NULL; }

		void SetProtobufMsgForGCUponSuccess( const CEngineGotvSyncPacket *pProtobufMsgForGCUponSuccess );

	public:
		int m_nIncrementalVectorIndex;
	protected:
		virtual int GetCallbackSizeBytes() OVERRIDE { return sizeof( HTTPRequestCompleted_t ); }
		CHLTVBroadcast *m_pParent;
		HTTPRequestHandle m_hRequest;
		CUtlString m_Resource;
		const CEngineGotvSyncPacket *m_pProtobufMsgForGCUponSuccess;
	};
public:
	CHLTVBroadcast( CHLTVServer *pHltvServer );
	virtual ~CHLTVBroadcast();
	int GetRecordingTick( void )
	{
		return m_nLastWrittenTick/* - m_nStartTick*/;
	}

	void	OnMasterStarted();
	void	StartRecording( const char *pBroadcastUrl );
	const char *GetUrl()const { return m_Url.Get(); }
	void	SetSignonState( int state ) {}; // not need by HLTV recorder
	bool	IsRecording( void );
	void	PauseRecording( void ) {};
	void	ResumeRecording( void ) {};
	void	StopRecording();

	void DumpStats();

	void	RecordCommand( const char *cmdstring );
	void	RecordUserInput( int cmdnumber ) {};  // not need by HLTV recorder
	//void	RecordMessages( bf_read &data, int bits );
	void	RecordServerClasses( CMemoryStream &stream, ServerClass *pClasses );
	void	RecordStringTables( CMemoryStream &stream );

	void	ResetDemoInterpolation( void ) {};
public:
	void	WriteFrame( CHLTVFrame *pFrame, bf_write *additionaldata = NULL );
	void	ResendStartup();

	void RecordSnapshot( CHLTVFrame * pFrame, bf_write * additionaldata, bf_write &msg, int nDeltaTick );

	void	CloseFile();
	void	Reset();

	void	WriteServerInfo( CMemoryStream &stream );
	void	WriteSignonData();  // write all necessary signon data and returns written bytes
	void	WriteMessages( CMemoryStream &stream, unsigned char cmd );

	void	SendSignonData();

	int		GetMaxAckTickCount();

	void	OnHttpRequestFailed();
	void	OnHttpRequestResetContent();
	void	OnHttpRequestSuccess();

	void Register( CHttpCallback *pCallback );
	void Unregister( CHttpCallback *pCallback );
protected:
	void FlushCollectedStreams(const char *pExtraParams = "");
	CHttpCallback * Send( const char* pPath, CMemoryStream &stream );
	CHttpCallback * Send( const char* pPath, const void *pBase, uint nSize );
	CHttpCallback * LowLevelSend( const CUtlString &path, const void *pBase, uint nSize );
protected:
	bool			m_bIsRecording;
	int				m_nFrameCount;
	int				m_nKeyframeTick;
	int				m_nStartTick;
	int				m_nDeltaTick;
	int				m_nSignonTick;
	int				m_nCurrentTick;
	int				m_nSignonDataAckTick; // when signon data was sent out last
	int				m_nLastWrittenTick;
	uint64			m_nMasterCookie;
	CHLTVServer		*m_pHltvServer;

	CMicroProfiler	m_mpKeyframe, m_mpFrame, m_mpLowLevelSend;
	int64 m_nMaxKeyframeTicks, m_nDecayMaxKeyframeTicks, m_nMaxLowLevelSendTicks;
	int64 m_nKeyframeBytes, m_nDeltaFrameBytes;

	FileHandle_t m_pFile;

	// The following fields are exclusive to the HTTP broadcast implementation, they are not needed for writing into file, memory or netchan streams
	//HTTPRequestHandle m_hHTTPRequestHandle;

	CMemoryStream m_DeltaStream; // this is being collected every tick, and flushed every so often
	CMemoryStream m_SignonDataStream;
	int m_nSignonDataFragment;
	CUtlString m_Url;
	float m_flTimeout;
	int	m_nFailedHttpRequests;

	friend class CHttpCallback;
	CUtlIncrementalVector< CHttpCallback > m_HttpRequests; // requests in flight
	int m_nHttpRequestBacklogHighWatermark;

	int m_nMatchFragmentCounter;
	float m_flBroadcastKeyframeInterval;
};




#endif // HLTVBROADCAST_HDR