/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
#include "plSDLModifier.h"

#include "../pnNetCommon/plSynchedObject.h"
#include "../pnDispatch/plDispatch.h"
#include "../pnSceneObject/plSceneObject.h"
#include "../pnMessage/plSDLModifierMsg.h"

#include "../plNetMessage/plNetMessage.h"
#include "../plSDL/plSDL.h"
#include "../plNetClient/plNetClientMgr.h"
#include "../plNetClient/plNetObjectDebugger.h"

plSDLModifier::plSDLModifier() : fStateCache(nil), fSentOrRecvdState(false)
{
}

plSDLModifier::~plSDLModifier()
{
	delete fStateCache;
}

plKey plSDLModifier::GetStateOwnerKey() const
{ 
	return GetTarget() ? GetTarget()->GetKey() : nil; 
}

void plSDLModifier::AddTarget(plSceneObject* so) 
{
	if (so)
		plSingleModifier::AddTarget(so);
	if (!fStateCache)
		fStateCache = TRACKED_NEW plStateDataRecord(GetSDLName());
}

UInt32 plSDLModifier::IApplyModFlags(UInt32 sendFlags)
{
	return sendFlags;
}

//
// write to net msg and send to server
//
void plSDLModifier::ISendNetMsg(plStateDataRecord*& state, plKey senderKey, UInt32 sendFlags)
{
	hsAssert(senderKey, "nil senderKey?");

	plSynchedObject* sobj = plSynchedObject::ConvertNoRef(senderKey->ObjectIsLoaded());
	if (sobj && (sobj->IsInSDLVolatileList(GetSDLName())))
		state->SetFlags(state->GetFlags() | plStateDataRecord::kVolatile);

	bool dirtyOnly = (sendFlags & plSynchedObject::kForceFullSend) == 0;
	bool broadcast = (sendFlags & plSynchedObject::kBCastToClients) != 0;
	int writeOptions=0;
//	if (dirtyOnly)
		writeOptions |= plSDL::kDirtyOnly;
	if (broadcast)
		writeOptions |= plSDL::kBroadcast;
		
	writeOptions |= plSDL::kTimeStampOnRead;
	
	plNetClientMgr::GetInstance()->StoreSDLState(state, senderKey->GetUoid(), sendFlags, writeOptions);
		
	fSentOrRecvdState = true;
}

//
// Process SDL msgs to send and recv state
//
hsBool plSDLModifier::MsgReceive(plMessage* msg)
{
	plSDLModifierMsg* sdlMsg = plSDLModifierMsg::ConvertNoRef(msg);
	if (sdlMsg && !stricmp(sdlMsg->GetSDLName(),GetSDLName()))
	{		
		UInt32 sendFlags = IApplyModFlags(sdlMsg->GetFlags());

		if (!fSentOrRecvdState)
			sendFlags |= plSynchedObject::kNewState;
		
		if (sdlMsg->GetAction()==plSDLModifierMsg::kSendToServer)
		{
			// local player is changing the state and sending it out
			plStateChangeNotifier::SetCurrentPlayerID(plNetClientApp::GetInstance()->GetPlayerID());	

			SendState(sendFlags);
		}
		else
		if (sdlMsg->GetAction()==plSDLModifierMsg::kSendToServerAndClients)
		{
			// local player is changing the state and sending it out
			plStateChangeNotifier::SetCurrentPlayerID(plNetClientApp::GetInstance()->GetPlayerID());

			SendState(sendFlags | plSynchedObject::kBCastToClients);
		}
		else
		if (sdlMsg->GetAction()==plSDLModifierMsg::kRecv)
		{
			plStateDataRecord* sdRec=sdlMsg->GetState();
			plStateChangeNotifier::SetCurrentPlayerID(sdlMsg->GetPlayerID());	// remote player changed the state
			ReceiveState(sdRec);
		}

		return true;	// consumed
	}

	return plSingleModifier::MsgReceive(msg);
}

//
// send a state update
//
bool gMooseDump=false;
void plSDLModifier::SendState(UInt32 sendFlags)
{
	hsAssert(fStateCache, "nil stateCache");

	bool debugObject = (plNetObjectDebugger::GetInstance() && 
			plNetObjectDebugger::GetInstance()->IsDebugObject(GetStateOwnerKey()->ObjectIsLoaded()));
	
	bool force = (sendFlags & plSynchedObject::kForceFullSend) != 0;
	bool broadcast = (sendFlags & plSynchedObject::kBCastToClients) != 0;

	// record current state
	plStateDataRecord* curState = TRACKED_NEW plStateDataRecord(GetSDLName());
	IPutCurrentStateIn(curState);	// return sdl record which reflects current state of sceneObj, dirties curState
	if (!force)
	{
		curState->FlagDifferentState(*fStateCache);	// flag items which are different from localCopy as dirty
	}

	if (curState->IsDirty())
	{
		// send current state
		bool dirtyOnly = force ? false : true;
		ISendNetMsg(curState, GetStateOwnerKey(), sendFlags);			// send the state

		if (debugObject)
		{
			gMooseDump=true;
			plNetObjectDebugger::GetInstance()->SetDebugging(true);
			curState->DumpToObjectDebugger(xtl::format("Object %s SENDS SDL state", 
				GetStateOwnerKey()->GetName(), dirtyOnly).c_str());
			gMooseDump=false;
		}

		// cache current state, send notifications if necessary
		fStateCache->UpdateFrom(*curState, dirtyOnly);	// update local copy of state
		
		ISentState(curState);
	}
	delete curState;

	if (plNetObjectDebugger::GetInstance())
		plNetObjectDebugger::GetInstance()->SetDebugging(false);
}

void plSDLModifier::ReceiveState(const plStateDataRecord* srcState)
{
	hsAssert(fStateCache, "nil stateCache");
	
	if (plNetObjectDebugger::GetInstance() && 
		plNetObjectDebugger::GetInstance()->IsDebugObject(GetStateOwnerKey()->ObjectIsLoaded()))
	{
		gMooseDump=true;
		plNetObjectDebugger::GetInstance()->SetDebugging(true);
		srcState->DumpToObjectDebugger(xtl::format("Object %s RECVS SDL state", 
			GetStateOwnerKey()->GetName()).c_str());
		gMooseDump=false;
	}

	if (srcState->IsUsed())
	{
		plSynchEnabler ps(false);	// disable dirty tracking while we are receiving/applying state

		// apply incoming state
		ISetCurrentStateFrom(srcState);			// apply incoming state to sceneObj
		
		// cache state, send notifications if necessary	
		fStateCache->UpdateFrom(*srcState, false);	// update local copy of state
		fSentOrRecvdState = true;
	}
	else
	{
		plNetClientApp::GetInstance()->DebugMsg("\tReceiving and ignoring unused SDL state msg: type %s, object %s", 
			GetSDLName(), GetStateOwnerKey()->GetName());
	}
	
	if (plNetObjectDebugger::GetInstance())
		plNetObjectDebugger::GetInstance()->SetDebugging(false);
}

void plSDLModifier::AddNotifyForVar(plKey key, const char* varName, float tolerance) const
{
	// create a SDL notifier object
	plStateChangeNotifier notifier(tolerance, key);
	// set the notification
	plStateDataRecord* rec = GetStateCache();
	if (rec)
	{
		plSimpleStateVariable* var = rec->FindVar(varName);
		// was the variable found?
		if (var)
			var->AddStateChangeNotification(notifier);
	}
}