/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkAMRFlashReaderInternal.hpp

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/**
 * @class   vtkAMRFlashReaderInternal
 * @brief   Consists of the low-level Flash Reader used by the vtkAMRFlashReader.
 *
 * @sa
 *  vtkAMRFlashReader
 */

#ifndef vtkAMRFlashReaderInternal_h
#define vtkAMRFlashReaderInternal_h

#include <cassert>
#include <cstring>
#include <map>
#include <string>
#include <vector>

#include "vtkByteSwap.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkDataSet.h"
#include "vtkDoubleArray.h"
#include "vtkIntArray.h"
#include "vtkObject.h"
#include "vtkSetGet.h"

#define H5_USE_16_API
#include "vtk_hdf5.h"

//==============================================================================
//            I N T E R N A L   F L A S H     R E A D E R
//==============================================================================

#define FLASH_READER_MAX_DIMS 3
#define FLASH_READER_LEAF_BLOCK 1
#define FLASH_READER_FLASH3_FFV8 8
#define FLASH_READER_FLASH3_FFV9 9

typedef struct tagFlashReaderIntegerScalar
{
  char Name[20]; // name  of the integer scalar
  int Value;     // value of the integer scalar
} FlashReaderIntegerScalar;

typedef struct tagFlashReaderDoubleScalar
{
  char Name[20]; // name  of the real scalar
  double Value;  // value of the real scalar
} FlashReaderDoubleScalar;

typedef struct tagFlashReaderSimulationParameters
{
  int NumberOfBlocks;     // number of all blocks
  int NumberOfTimeSteps;  // number of time steps
  int NumberOfXDivisions; // number of divisions per block along x axis
  int NumberOfYDivisions; // number of divisions per block along y axis
  int NumberOfZDivisions; // number of divisions per block along z axis
  double Time;            // the time of this step
  double TimeStep;        // time interval
  double RedShift;
} FlashReaderSimulationParameters;

typedef struct tagFlashReaderBlock
{
  int Index;                   // Id of the block
  int Level;                   // LOD level
  int Type;                    // a leaf block?
  int ParentId;                // Id  of the parent block
  int ChildrenIds[8];          // Ids of the children    blocks
  int NeighborIds[6];          // Ids of the neighboring blocks
  int ProcessorId;             // Id  of the processor
  int MinGlobalDivisionIds[3]; // first (global) division index
  int MaxGlobalDivisionIds[3]; // last  (global) division index
  double Center[3];            // center of the block
  double MinBounds[3];         // lower left  of the bounding box
  double MaxBounds[3];         // upper right of the bounding box
} FlashReaderBlock;

typedef struct tagFlashReaderSimulationInformation
{
  int FileFormatVersion;
  char SetupCall[400];
  char FileCreationTime[80];
  char FlashVersion[80];
  char BuildData[80];
  char BuildDirectory[80];
  char build_machine[80];
  char CFlags[400];
  char FFlags[400];
  char SetupTimeStamp[80];
  char BuildTimeStamp[80];
} FlashReaderSimulationInformation;

static std::string GetSeparatedParticleName(const std::string& variable)
{
  std::string sepaName = variable;

  if (sepaName.length() > 9 && sepaName.substr(0, 9) == "particle_")
  {
    sepaName = std::string("Particles/") + sepaName.substr(9);
  }
  else
  {
    sepaName = std::string("Particles/") + sepaName;
  }

  return sepaName;
}

// ----------------------------------------------------------------------------
//                     Class  vtkFlashReaderInternal (begin)
// ----------------------------------------------------------------------------

class vtkFlashReaderInternal
{
public:
  vtkFlashReaderInternal() { this->Init(); }
  ~vtkFlashReaderInternal() { this->Init(); }

  int NumberOfBlocks;            // number of ALL blocks
  int NumberOfLevels;            // number of levels
  int FileFormatVersion;         // version of file format
  int NumberOfParticles;         // number of particles
  int NumberOfLeafBlocks;        // number of leaf blocks
  int NumberOfDimensions;        // number of dimensions
  int NumberOfProcessors;        // number of processors
  int HaveProcessorsInfo;        // processor Ids available?
  int BlockGridDimensions[3];    // number of grid points
  int BlockCellDimensions[3];    // number of divisions
  int NumberOfChildrenPerBlock;  // number of children  per block
  int NumberOfNeighborsPerBlock; // number of neighbors per block

  char* FileName;                                         // Flash data file name
  hid_t FileIndex;                                        // file handle
  double MinBounds[3];                                    // lower left  of the bounding-box
  double MaxBounds[3];                                    // upper right of the bounding box
  FlashReaderSimulationParameters SimulationParameters;   // CFD simulation
  FlashReaderSimulationInformation SimulationInformation; // CFD simulation

  // blocks
  std::vector<FlashReaderBlock> Blocks;
  std::vector<int> LeafBlocks;
  std::vector<std::string> AttributeNames;

  // particles
  std::string ParticleName;
  std::vector<hid_t> ParticleAttributeTypes;
  std::vector<std::string> ParticleAttributeNames;
  std::map<std::string, int> ParticleAttributeNamesToIds;

  int GetCycle();
  double GetTime();

  void Init();
  void SetFileName(VTK_FILEPATH char* fileName) { this->FileName = fileName; }
  const char* GetParticleName(char* variableName)
  {
    static std::string particleName;
    particleName = GetSeparatedParticleName(std::string(variableName));
    return particleName.c_str();
  }

  void ReadMetaData();
  void ReadProcessorIds();
  void ReadDoubleScalars(hid_t fileIndx);
  void ReadIntegerScalars(hid_t fileIndx);
  void ReadVersionInformation(hid_t fileIndx);
  void ReadSimulationParameters(hid_t fileIndx, bool bTmCycle = false); // time and cycle only
  void GetBlockMinMaxGlobalDivisionIds();

  void ReadBlockTypes();
  void ReadBlockBounds();
  void ReadBlockCenters();
  void ReadBlockStructures();
  void ReadRefinementLevels();
  void ReadDataAttributeNames();

  void ReadParticlesComponent(hid_t dataIndx, const char* compName, double* dataBuff);
  void ReadParticleAttributes();
  void ReadParticleAttributesFLASH3();
  void GetBlockAttribute(const char* attribute, int blockIdx, vtkDataSet* pDataSet);
};

// ----------------------------------------------------------------------------
//                     Class  vtkFlashReaderInternal ( end )
// ----------------------------------------------------------------------------
#endif /* vtkAMRFlashReaderInternal_h */
// VTK-HeaderTest-Exclude: vtkAMRFlashReaderInternal.h