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

 Program:   Visualization Toolkit
 Module:    vtkAMREnzoReader.h

 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   vtkAMREnzoReader
 *
 *
 * A concrete instance of vtkAMRBaseReader that implements functionality
 * for reading Enzo AMR datasets.
 */

#ifndef vtkAMREnzoReader_h
#define vtkAMREnzoReader_h

#include "vtkAMRBaseReader.h"
#include "vtkIOAMRModule.h" // For export macro

#include <map>    // For STL map
#include <string> // For std::string

class vtkOverlappingAMR;
class vtkEnzoReaderInternal;

class VTKIOAMR_EXPORT vtkAMREnzoReader : public vtkAMRBaseReader
{
public:
  static vtkAMREnzoReader* New();
  vtkTypeMacro(vtkAMREnzoReader, vtkAMRBaseReader);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  //@{
  /**
   * Set/Get whether data should be converted to CGS
   */
  vtkSetMacro(ConvertToCGS, vtkTypeBool);
  vtkGetMacro(ConvertToCGS, vtkTypeBool);
  vtkBooleanMacro(ConvertToCGS, vtkTypeBool);
  //@}

  /**
   * See vtkAMRBaseReader::GetNumberOfBlocks
   */
  int GetNumberOfBlocks() override;

  /**
   * See vtkAMRBaseReader::GetNumberOfLevels
   */
  int GetNumberOfLevels() override;

  /**
   * See vtkAMRBaseReader::SetFileName
   */
  void SetFileName(const char* fileName) override;

protected:
  vtkAMREnzoReader();
  ~vtkAMREnzoReader() override;

  /**
   * Parses the parameters file and extracts the
   * conversion factors that are used to convert
   * to CGS units.
   */
  void ParseConversionFactors();

  /**
   * Given an array name of the form "array[idx]" this method
   * extracts and returns the corresponding index idx.
   */
  int GetIndexFromArrayName(std::string arrayName);

  /**
   * Given the label string, this method parses the attribute label and
   * the string index.
   */
  void ParseLabel(const std::string& labelString, int& idx, std::string& label);

  /**
   * Given the label string, this method parses the corresponding attribute
   * index and conversion factor
   */
  void ParseCFactor(const std::string& labelString, int& idx, double& factor);

  /**
   * Given the variable name, return the conversion factor used to convert
   * the data to CGS. These conversion factors are read directly from the
   * parameters file when the filename is set.
   */
  double GetConversionFactor(const std::string& name);

  /**
   * See vtkAMRBaseReader::ReadMetaData
   */
  void ReadMetaData() override;

  /**
   * See vtkAMRBaseReader::GetBlockLevel
   */
  int GetBlockLevel(const int blockIdx) override;

  void ComputeStats(
    vtkEnzoReaderInternal* internal, std::vector<int>& blocksPerLevel, double min[3]);

  /**
   * See vtkAMRBaseReader::FillMetaData
   */
  int FillMetaData() override;

  /**
   * See vtkAMRBaseReader::GetAMRGrid
   */
  vtkUniformGrid* GetAMRGrid(const int blockIdx) override;

  /**
   * See vtkAMRBaseReader::GetAMRGridData
   */
  void GetAMRGridData(const int blockIdx, vtkUniformGrid* block, const char* field) override;

  /**
   * See vtkAMRBaseReader::GetAMRGridData
   */
  void GetAMRGridPointData(const int vtkNotUsed(blockIdx), vtkUniformGrid* vtkNotUsed(block),
    const char* vtkNotUsed(field)) override
  {
  }

  /**
   * See vtkAMRBaseReader::SetUpDataArraySelections
   */
  void SetUpDataArraySelections() override;

  vtkTypeBool ConvertToCGS;
  bool IsReady;

private:
  vtkAMREnzoReader(const vtkAMREnzoReader&) = delete;
  void operator=(const vtkAMREnzoReader&) = delete;

  vtkEnzoReaderInternal* Internal;

  std::map<std::string, int> label2idx;
  std::map<int, double> conversionFactors;
};

#endif /* vtkAMREnzoReader_h */