#ifndef __LSGRM_CONTROLLER_H
#define __LSGRM_CONTROLLER_H
#include "lsrmGetInternalMemory.h"
#include "lsgrmSplitter.h"
#include "lsgrmGraphOperations.h"
#include "itkObject.h"
#include "itkMacro.h"

namespace lsgrm
{
template<class TSegmenter>
class ITK_EXPORT Controller : public itk::Object
{
public:

  /** Standard class typedef */
  typedef Controller Self;
  typedef itk::LightObject                     Superclass;
  typedef itk::SmartPointer<Self>              Pointer;
  typedef itk::SmartPointer<const Self>        ConstPointer;

  /** Runtime information support. */
  itkTypeMacro(Controller, itk::Object);

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** Enum for tiling mode */
  enum LSGRMTilingMode
    {
    LSGRM_TILING_NONE,
    LSGRM_TILING_USER,
    LSGRM_TILING_AUTO
    };

  /* Some convenient typedefs */
  using SegmenterType = TSegmenter;
  using ImageType = typename SegmenterType::ImageType;
  using LabelImageType = typename SegmenterType::LabelImageType;
  using SegmentationParameterType = typename SegmenterType::ParameterType;

  /* Default constructor and destructor. */
  Controller();
  ~Controller();

  void RunSegmentation();

  void SetSpecificParameters(const SegmentationParameterType& params);
  void SetInputImage(ImageType * inputImage);
  void SetInternalMemoryAvailable(long long unsigned int v); // expecting a value in Mbytes.

  /* Accessors */
  void SetTilingModeNone(){m_TilingMode = LSGRM_TILING_NONE;};
  void SetTilingModeUser(){m_TilingMode = LSGRM_TILING_USER;};
  void SetTilingModeAuto(){m_TilingMode = LSGRM_TILING_AUTO;};

  typename LabelImageType::Pointer GetLabeledClusteredOutput();

  itkGetMacro(Margin, unsigned int);
  itkGetMacro(TemporaryFilesList, std::vector<std::string>);

  itkGetMacro(CleanTemporaryDirectory, bool);
  itkSetMacro(CleanTemporaryDirectory, bool);

  itkGetMacro(TemporaryDirectory, std::string);
  itkSetMacro(TemporaryDirectory, std::string);

  itkGetMacro(Threshold, float);
  itkSetMacro(Threshold, float);

  itkGetMacro(NumberOfIterations, unsigned int);
  itkSetMacro(NumberOfIterations, unsigned int);

  itkGetMacro(NbTilesX, unsigned int);
  itkSetMacro(NbTilesX, unsigned int);

  itkGetMacro(NbTilesY, unsigned int);
  itkSetMacro(NbTilesY, unsigned int);

  itkGetMacro(NumberOfFirstIterations, unsigned int);
  itkSetMacro(NumberOfFirstIterations, unsigned int);

  itkGetMacro(TileWidth, unsigned int);
  itkSetMacro(TileWidth, unsigned int);

  itkGetMacro(TileHeight, unsigned int);
  itkSetMacro(TileHeight, unsigned int);

private:

  void GetAutomaticConfiguration();
  long unsigned int GetMaximumNumberOfNodesInMemory();

  /* Parameters given by the user */
  std::string m_TemporaryDirectory;      // Directory used to store intermediate files during the process.
  bool        m_CleanTemporaryDirectory; // Clean the temporary directory.
  ImageType * m_InputImage;              // Input image

  /* Segmentation parameters */
  SegmentationParameterType m_SpecificParameters; // Specific parameters
  float                     m_Threshold;          // Threshold
  unsigned int              m_NumberOfIterations; // Number of iterations

  /* Parameters given by the user or computed automatically
   * depending of the chosen mode
   */
  long long unsigned int m_Memory; // RAM available for the computation.
  unsigned int m_NbTilesX;
  unsigned int m_NbTilesY;
  unsigned int m_NumberOfFirstIterations;
  unsigned int m_TileWidth;
  unsigned int m_TileHeight;

  /* read-only variables */
  unsigned int m_Margin;
  std::vector<ProcessingTile> m_Tiles;
  std::vector<std::string> m_TemporaryFilesList;
  LSGRMTilingMode m_TilingMode;
  typename LabelImageType::Pointer m_LabelImage;
};
} // end of namespace lsgrm

#include "lsgrmController.txx"
#endif