/*
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.

This file is part of GtkRadiant.

GtkRadiant 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 2 of the License, or
(at your option) any later version.

GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef _PLUGINMANAGER_H_
#define _PLUGINMANAGER_H_

#include "plugin.h"

// global interfaces we are using
extern _QERShadersTable g_ShadersTable;

// NOTE: it's actually a module manager, the name should change to ModuleManager..
class CPlugInManager  
{
private:
  GSList* m_PlugIns;
  CPtrArray m_BrushHandles;
  CPtrArray m_SelectedBrushHandles;
  CPtrArray m_ActiveBrushHandles;

  // v1.70
  //! brushes of the current entity ( see m_SelectedBrushHandles and m_ActiveBrushHandles )
  CPtrArray m_EntityBrushHandles;
  //! allocated entities, not commited yet ( see m_BrushHandles )
  CPtrArray m_EntityHandles;

  //! tells in which array to look when given a patch index
  enum EPatchesMode { EActivePatches, ESelectedPatches, EAllocatedPatches } PatchesMode;
  //! patches handles (brush_t*)
  CPtrArray m_PatchesHandles;
  //! plugin-allocated patches, not commited yet (patchMesh_t*)
  CPtrArray m_PluginPatches;

  void InitForDir(const Str &dir); ///< init for plguins/modules below this directory

public:
  CPtrArray& GetActiveHandles() {return m_ActiveBrushHandles; };
  CPtrArray& GetSelectedHandles() {return m_SelectedBrushHandles; };
  CPtrArray& GetPluginPatches() {return m_PluginPatches; };
  brush_t* FindBrushHandle(void *vp);
  patchMesh_t* FindPatchHandle(int index);
  int CreatePatchHandle();
  int AllocateActivePatchHandles();
  int AllocateSelectedPatchHandles();
  void CommitPatchHandleToMap(int index, patchMesh_t *pMesh, char *texName);
  void CommitPatchHandleToEntity(int index, patchMesh_t *pMesh, char *texName, void *vpEntity);
  void ReleasePatchesHandles() { m_PatchesHandles.RemoveAll(); m_PluginPatches.RemoveAll(); }
  void AddFaceToBrushHandle(void *vp, vec3_t v1, vec3_t v2, vec3_t v3);
  void CommitBrushHandleToMap(void *vp);
  void DeleteBrushHandle(void* vp);
  void* CreateBrushHandle();
  void Dispatch(int n, const char *p);
  void Cleanup(); ///< cleanup of data structures allocated for plugins, not a plugin reload
  void Init(); ///< go through the path where we will find modules and plugins
  void LoadImage (const char *name, unsigned char **pic, int *width, int *height);
  void ImportMap (IDataStream *in, CPtrArray *ents, const char *type);
  void ExportMap (CPtrArray *ents, IDataStream *out, const char *type);
  void Shutdown(); ///< shutdown all the plugins/module subsystem
  CPlugInManager();
  virtual ~CPlugInManager();

  /*! 
  the texture manager front ends the single load
  addins (texture, model, map formats.. etc.)
  */
  _QERTextureInfo* GetTextureInfo();
  void LoadTexture(const char *pFilename);
	
void* GetSurfaceFlags();
	
  // v1.70
  CPtrArray& GetEntityBrushHandles() {return m_EntityBrushHandles; };
  CPtrArray& GetEntityHandles() {return m_EntityHandles; };
  //! the vpBrush needs to be in m_BrushHandles
  void CommitBrushHandleToEntity(void* vpBrush, void* vpEntity );
  //! the vpEntity needs to be in m_EntityHandles
  void CommitEntityHandleToMap( void* vpEntity );

protected:
  //! read the interfaces this plugin implements
  void LoadFromPath(const char *path); ///< load all modules/plugins in specified path
  void RegisterInterfaces();
};

class CPluginSlot : public IPlugIn
{
  APIDescriptor_t *mpAPI;
  _QERPluginTable *mpTable;
  /*!
  is false until Init() happened
  */
  bool m_bReady;
  /*!
  below is valid only if m_bReady = true
  */
  GSList *m_CommandStrings;
  GSList *m_CommandIDs;
  
public:
  /*!
  build directly from a SYN_PROVIDE interface
  */
  CPluginSlot(APIDescriptor_t *pAPI);
  virtual ~CPluginSlot();
  
  APIDescriptor_t* GetDescriptor() { return mpAPI; }
  /*!
  initialize some management data after the synapse interfaces have been hooked up
  */
  void Init();
  /*!
  dispatching a command by name to the plugin
  */
  void Dispatch(const char *p);
  
  // IPlugIn ------------------------------------------------------------
  const char* getMenuName();
  int getCommandCount();
  const char* getCommand(int n);  
  void addMenuID(int n);
  bool ownsCommandID(int n);
  
};

class CRadiantPluginManager : public CSynapseAPIManager
{
  list<CPluginSlot *> mSlots;
public:
  CRadiantPluginManager() {}
  virtual ~CRadiantPluginManager();
  
  // CSynapseAPIManager interface -------------------
  APIDescriptor_t *BuildRequireAPI(APIDescriptor_t *pAPI);
  
  // CRadiantPluginManager --------------------------
  void PopulateMenu();
  bool Dispatch(int n, const char* p);
};

class CImageTableSlot
{
  /*!
  \todo this is a duplicate from the APIDescriptor_t* list that privately stored inside CSynapseAPIManager
  this is probably useless to us in here?
  */
  APIDescriptor_t *mpAPI;
  /*!
  shortcut to mpAPI->mpTable, with correct typing
  this is what we allocate and should free locally
  */
  _QERPlugImageTable *mpTable;
public:
  CImageTableSlot() { }
  virtual ~CImageTableSlot() { } ///\ \todo need to correctly free and release still..
  
  APIDescriptor_t* GetDescriptor() { return mpAPI; }
  _QERPlugImageTable* GetTable() { return mpTable; }
  
  /*!
  don't go through PrepareRequireAPI for init, just get this API and add the table info
  */
  void InitForFillAPITable(APIDescriptor_t *pAPI);
};

class CRadiantImageManager : public CSynapseAPIManager
{
  list<CImageTableSlot *> mSlots;
  
  list<CImageTableSlot *>::iterator mExtScanSlot;
public:
  CRadiantImageManager() {}
  virtual ~CRadiantImageManager();
  
  // CSynapseAPIManager interface --------------------
  void FillAPITable(APIDescriptor_t *pAPI);

  // CRadiantImageManager ----------------------------
  /*!
  extract the extension, go through the list of image interfaces, and load
  */
  void LoadImage(const char *name, byte **pic, int *width, int *height);
    
  /*!
  we often need to walk through the extensions
  this used to be hardcoded in texwindow.cpp
  the two functions are related, they use a static to go through the list
  */
  void BeginExtensionsScan();
  const char* GetNextExtension(); ///< \return NULL when the list has been completely scanned
};

extern CRadiantImageManager g_ImageManager;

#endif // _PLUGINMANAGER_H_