/*==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/>.

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==*/
#ifndef SCENE_SYNC_H
#define SCENE_SYNC_H

#include "Max.h"
#include "notify.h"

#include <vector>
#include <set>

class plMaxNode;
class hsSemaphore;
class SceneWatcher;
class plSceneNode;

#include "pnKeyedObject/plUoid.h"
#include "pnKeyedObject/plKey.h"

class SceneSync
{
protected:
    SceneWatcher *fSceneWatcher;
    hsSemaphore *fUpdateSignal;
    const char *fPipeName;
    int fTimerID;
    int fUpdateFreq;
    
    SceneSync();

public:
    static SceneSync& Instance();

    // Get the path where the current Max file will be exported to (not including "dat")
    bool GetOutputDir(char *buf);

    bool IsClientRunning();

    // Is there valid data on disk that we can load into the ResMgr or do we need to reconvert?
    bool CanLoadOldResMgr();

    // Create client data
    bool CreateClientData();

    void SetUpdateFreq(int freq);   // In milliseconds

    // Start updating the client
    bool BeginClientSync(const char *semaphoreName, const char *pipeName);
    // Stop updating the client.  If abort is true, don't try saving, something went wrong
    void EndClientSync(bool abort);

protected:
    bool SaveResMgr();

    void IShutdownClient();

    // Reconvert any dirty nodes to sync the Plasma database and the Max one
    bool Update();

    void AddSceneNodes(std::set<plSceneNode*>& sceneNodes, std::vector<plUoid>& delUoids, std::vector<plKey>& newKeys);

    bool IStartWatching(bool forceWatch=false);
    bool IStopWatching();

    // Called by open and close scene.
    bool IReadNodeMap(const char *dir);
    bool IWriteNodeMap(const char *dir);

    void IShutdown();

    void IDeletePath(const char *path);
    void IClearDirtyRecur(plMaxNode *node);

    static void INotify(void *param, NotifyInfo *info);

    static void CALLBACK ITimerProc(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime);
};

#endif //SCENE_SYNC_H