/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkGiplImageIO_h
#define itkGiplImageIO_h
#include "ITKIOGIPLExport.h"


#include <fstream>
#include "itkImageIOBase.h"
#include <cstdio>
#include <memory> // For unique_ptr.

namespace itk
{
class GiplImageIOInternals;

/**
 * \class GiplImageIO
 *
 *  \brief Read GIPL (Guy's Image Processing Lab) file format.
 *
 *  \ingroup IOFilters
 *
 * \ingroup ITKIOGIPL
 */
class ITKIOGIPL_EXPORT GiplImageIO : public ImageIOBase
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(GiplImageIO);

  /** Standard class type aliases. */
  using Self = GiplImageIO;
  using Superclass = ImageIOBase;
  using Pointer = SmartPointer<Self>;

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

  /** \see LightObject::GetNameOfClass() */
  itkOverrideGetNameOfClassMacro(GiplImageIO);

  /*-------- This part of the interfaces deals with reading data. ----- */

  /** Determine the file type. Returns true if this ImageIO can read the
   * file specified. */
  bool
  CanReadFile(const char *) override;

  /** Read information about the Gipl file and put the cursor of the stream just before the first data pixel. */
  void
  ReadImageInformation() override;

  /** Reads the data from disk into the memory buffer provided. */
  void
  Read(void * buffer) override;

  /*-------- This part of the interfaces deals with writing data. ----- */

  /** Determine the file type. Returns true if this ImageIO can write the
   * file specified. */
  bool
  CanWriteFile(const char *) override;

  /** Set the spacing and dimension information for the set filename. */
  void
  WriteImageInformation() override;

  /** Writes the data to disk from the memory buffer provided. Make sure
   * that the IORegions has been set properly. */
  void
  Write(const void * buffer) override;

  GiplImageIO();
  ~GiplImageIO() override;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;

private:
  void
  SwapBytesIfNecessary(void * buffer, SizeValueType numberOfPixels);

  bool
  CheckExtension(const char *);

  std::ifstream m_Ifstream{};
  std::ofstream m_Ofstream{};
  bool          m_IsCompressed{};

  const std::unique_ptr<GiplImageIOInternals> m_Internal;
};
} // end namespace itk

#endif // itkGiplImageIO_h
