#ifndef _X3D_PARSER_XERCES__H
#define _X3D_PARSER_XERCES__H

// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/sax/HandlerBase.hpp>
#include "Mesh.h"
#include "BoundingBoxConverter.h"


namespace GtpVisibilityPreprocessor {

XERCES_CPP_NAMESPACE_USE
XERCES_CPP_NAMESPACE_BEGIN
class AttributeList;
XERCES_CPP_NAMESPACE_END

class VspBspTree;
class BspTree;
class ViewCellsManager;
class ViewCellsTree;
class VspTree;
class OspTree;
class VspNode;
class BvhNode;
class BvHierarchy;
class HierarchyManager;


class ViewCellsParseHandlers: public HandlerBase
{
public:
  // -----------------------------------------------------------------------
  //  Constructors and Destructor
  // -----------------------------------------------------------------------
  ViewCellsParseHandlers(ObjectContainer &pvsObjects, 
						 ObjectContainer &preprocessorObjects, 
						 BoundingBoxConverter *bconverter);
  ~ViewCellsParseHandlers();
  
  
  // -----------------------------------------------------------------------
  //  Getter methods
  // -----------------------------------------------------------------------
  unsigned int GetElementCount()
  {
    return mElementCount;
  }
  
  unsigned int GetAttrCount()
  {
    return mAttrCount;
  }
  
  unsigned int GetCharacterCount()
  {
    return mCharacterCount;
  }
  
  unsigned int GetSpaceCount()
  {
    return mSpaceCount;
  }


  // -----------------------------------------------------------------------
  //  Handlers for the SAX DocumentHandler interface
  // -----------------------------------------------------------------------
  void endElement(const XMLCh* const name);
  void startElement(const XMLCh* const name, AttributeList& attributes);
  void characters(const XMLCh* const chars, const unsigned int length);
  void ignorableWhitespace(const XMLCh* const chars, const unsigned int length);
  void resetDocument();

  void CreateViewCellsManager(/*const char *name*/);

  void ReplacePvs();
  void ReplaceBvhPvs(ViewCell *vc);


  /////////////////////////

  VspBspTree *mVspBspTree;
  HierarchyManager *mHierarchyManager;
 
  BspTree *mBspTree;
  ViewCellsTree *mViewCellsTree;
  VspTree *mVspTree;

  BspNode *mCurrentBspNode;
  BvhNode *mCurrentBvhNode;
  KdNode *mCurrentOspNode;
  VspNode *mCurrentVspNode;
 
  ViewCell *mCurrentViewCell;
    
  BspNode *mBspRoot;
  VspNode *mVspRoot;
  ViewCell *mViewCellRoot;
  
  int mUniqueObjectId;
  vector<BvhLeaf *> mBvhLeaves;
  //typedef map<int, ViewCell *> ViewCellsMap;
  //ViewCellsMap mViewCells;
  ViewCellContainer mViewCells;

  ViewCellsManager *mViewCellsManager;

  ObjectContainer &mPvsObjects;
  ObjectContainer &mPreprocessorObjects;

  bool mCreatePvsObjects;

  BoundingBoxConverter *mBoundingBoxConverter;
  AxisAlignedBox3 mViewSpaceBox;
  IndexedBoundingBoxContainer mIBoundingBoxes;
 
  /// current state of the parser
  int mCurrentState;
  
  enum {
	  PARSE_OPTIONS, 
	  PARSE_VIEWCELLS, 
	  PARSE_VIEWSPACE_HIERARCHY, 
	  PARSE_OBJECTSPACE_HIERARCHY};

  /// view space / object space hierarchy types
  enum {BSP, VSP, OSP, BVH};

  int mViewSpaceHierarchyType;
  int mObjectSpaceHierarchyType;
  int nViewCells;
  int nObjects;
  
  
  ////////////////////////////////


  // Handlers for X3D
  
  void StartBspLeaf(AttributeList& attributes);
  void StartBspInterior(AttributeList& attributes);
  void EndBspInterior();

  void StartVspLeaf(AttributeList& attributes);
  void StartVspInterior(AttributeList& attributes);
  void EndVspInterior();

  void StartViewCellPvs(ObjectPvs &pvs, const char *ptr);

  void EndViewCells();
  void EndBoundingBoxes();

  void StartBspElement(string element, AttributeList& attributes);
  void StartVspElement(string element, AttributeList& attributes);

  void StartViewSpaceHierarchy(AttributeList& attributes);
  void StartObjectSpaceHierarchy(AttributeList& attributes);

  void StartBoundingBox(AttributeList& attributes);
  void StartViewCell(AttributeList& attributes, const bool isLeaf);
  void EndViewCellInterior();

  void StartViewSpaceHierarchyElement(const std::string &element, AttributeList& attributes);
  void StartObjectSpaceHierarchyElement(const std::string &element, AttributeList& attributes);
  void StartViewCellHierarchyElement(const std::string &element, AttributeList& attributes);

  void StartOspElement(string element, AttributeList& attributes);

  void StartOspLeaf(AttributeList& attributes);
  void StartOspInterior(AttributeList& attributes);

  void CreateViewSpaceHierarchy();

  void StartBvhLeaf(AttributeList& attributes);
  void StartBvhInterior(AttributeList& attributes);
  void StartBvhElement(string element, AttributeList& attributes);

  void EndViewSpaceHierarchyInterior();
  void EndObjectSpaceHierarchyInterior();

  void EndBvhInterior();
  void EndOspInterior();

  void EndObjectSpaceHierarchy();

  void StartBvhLeafObjects(ObjectContainer &objects, const char *ptr);

  // -----------------------------------------------------------------------
  //  Handlers for the SAX ErrorHandler interface
  // -----------------------------------------------------------------------

  void warning(const SAXParseException& exc);
  void error(const SAXParseException& exc);
  void fatalError(const SAXParseException& exc);
  
  
private:
  // -----------------------------------------------------------------------
  //  Private data members
  //
  //  fAttrCount
  //  fCharacterCount
  //  fElementCount
  //  fSpaceCount
  //      These are just counters that are run upwards based on the input
  //      from the document handlers.
  // -----------------------------------------------------------------------
  unsigned int    mAttrCount;
  unsigned int    mCharacterCount;
  unsigned int    mElementCount;
  unsigned int    mSpaceCount;
};

// ---------------------------------------------------------------------------
//  This is a simple class that lets us do easy (though not terribly efficient)
//  trancoding of XMLCh data to local code page for display.
// ---------------------------------------------------------------------------
class StrX
{
public :
  // -----------------------------------------------------------------------
  //  Constructors and Destructor
  // -----------------------------------------------------------------------
  StrX(const XMLCh* const toTranscode)
  {
	  // Call the private transcoding method
	  mLocalForm = XMLString::transcode(toTranscode);
  }
  
  ~StrX()
  {
	  XMLString::release(&mLocalForm);
  }
  
  // -----------------------------------------------------------------------
  //  Getter methods
  // -----------------------------------------------------------------------
  const char* LocalForm() const
  {
    return mLocalForm;
  }
  
private :
  // -----------------------------------------------------------------------
  //  Private data members
  //
  //  fLocalForm
  //      This is the local code page form of the string.
  // -----------------------------------------------------------------------
  char*   mLocalForm;
};

inline XERCES_STD_QUALIFIER ostream&
operator<<(XERCES_STD_QUALIFIER ostream& target, const StrX& toDump)
{
  target << toDump.LocalForm();
  return target;
}
}

#endif