/*
 * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 otbWrapperInputImageParameter_hxx
#define otbWrapperInputImageParameter_hxx

#include "otbWrapperInputImageParameter.h"

#include "otbWrapperCastImage.h"

namespace otb
{
namespace Wrapper
{


#define CLAMP_IMAGE_IF(Out, In, image_base)       \
  {                                               \
    In* in_image = dynamic_cast<In*>(image_base); \
                                                  \
    if (in_image)                                 \
      return Cast<Out, In>(in_image);             \
  }

#define CLAMP_IMAGE_BASE(T, image_base)                          \
  {                                                              \
    CLAMP_IMAGE_IF(T, UInt8VectorImageType, image_base);         \
    CLAMP_IMAGE_IF(T, Int16VectorImageType, image_base);         \
    CLAMP_IMAGE_IF(T, UInt16VectorImageType, image_base);        \
    CLAMP_IMAGE_IF(T, Int32VectorImageType, image_base);         \
    CLAMP_IMAGE_IF(T, UInt32VectorImageType, image_base);        \
                                                                 \
    CLAMP_IMAGE_IF(T, FloatVectorImageType, image_base);         \
    CLAMP_IMAGE_IF(T, DoubleVectorImageType, image_base);        \
                                                                 \
    CLAMP_IMAGE_IF(T, ComplexInt16VectorImageType, image_base);  \
    CLAMP_IMAGE_IF(T, ComplexInt32VectorImageType, image_base);  \
                                                                 \
    CLAMP_IMAGE_IF(T, ComplexFloatVectorImageType, image_base);  \
    CLAMP_IMAGE_IF(T, ComplexDoubleVectorImageType, image_base); \
                                                                 \
    CLAMP_IMAGE_IF(T, UInt8RGBImageType, image_base);            \
    CLAMP_IMAGE_IF(T, UInt8RGBAImageType, image_base);           \
                                                                 \
    CLAMP_IMAGE_IF(T, UInt8ImageType, image_base);               \
    CLAMP_IMAGE_IF(T, Int16ImageType, image_base);               \
    CLAMP_IMAGE_IF(T, UInt16ImageType, image_base);              \
    CLAMP_IMAGE_IF(T, Int32ImageType, image_base);               \
    CLAMP_IMAGE_IF(T, UInt32ImageType, image_base);              \
                                                                 \
    CLAMP_IMAGE_IF(T, FloatImageType, image_base);               \
    CLAMP_IMAGE_IF(T, DoubleImageType, image_base);              \
                                                                 \
    CLAMP_IMAGE_IF(T, ComplexInt16ImageType, image_base);        \
    CLAMP_IMAGE_IF(T, ComplexInt32ImageType, image_base);        \
                                                                 \
    CLAMP_IMAGE_IF(T, ComplexFloatImageType, image_base);        \
    CLAMP_IMAGE_IF(T, ComplexDoubleImageType, image_base);       \
                                                                 \
    return nullptr;                                              \
  }


template <typename TOutputImage, typename TInputImage>
TOutputImage* InputImageParameter::Cast(TInputImage* image)
{
  details::CastImage<TOutputImage, TInputImage> clamp(image);

  if (clamp.ocif)
    clamp.ocif->UpdateOutputInformation();

  m_InputCaster  = clamp.icif;
  m_OutputCaster = clamp.ocif;

  return clamp.out;
}


template <class TImageType>
TImageType* InputImageParameter::GetImage()
{
  // Used m_PreviousFileName because if not, when the user call twice GetImage,
  // it without changing the filename, it returns 2 different
  // image pointers
  // Only one image type can be used

  // 2 cases : the user set a filename vs. the user set an image
  if (m_UseFilename)
  {
    if (m_PreviousFileName != m_FileName && !m_FileName.empty())
    {
      //////////////////////// Filename case:
      // A new valid filename has been given : a reader is created
      typedef otb::ImageFileReader<TImageType> ReaderType;

      typename ReaderType::Pointer reader = ReaderType::New();

      reader->SetFileName(m_FileName);

      reader->UpdateOutputInformation();

      m_Image  = reader->GetOutput();
      m_Reader = reader;

      m_PreviousFileName = m_FileName;

      // Pay attention, don't return m_Image because it is a ImageBase...
      return reader->GetOutput();
    }
    else
    {
      // In this case, the reader and the image should already be there
      if (m_Image.IsNull())
      {
        itkExceptionMacro("No input image or filename detected...");
      }
      else
      {
        // Check if the image type asked here is the same as the one used for the reader
        if (dynamic_cast<TImageType*>(m_Image.GetPointer()))
        {
          return dynamic_cast<TImageType*>(m_Image.GetPointer());
        }
        else
        {
          itkExceptionMacro(
              "GetImage() was already called with a different type, "
              "probably due to two calls to GetParameter<Type>Image with different types in application code.");
        }
      }
    }
  }

  else
  {
    //////////////////////// Image case:
    if (m_Image.IsNull())
    {
      return nullptr;
    }
    // Check if the image type asked here is the same as m_image
    else if (dynamic_cast<TImageType*>(m_Image.GetPointer()))
    {
      return dynamic_cast<TImageType*>(m_Image.GetPointer());
    }
    // check if we already done this cast
    else if (dynamic_cast<ClampImageFilter<DoubleVectorImageType, TImageType>*>(m_OutputCaster.GetPointer()))
    {
      return dynamic_cast<ClampImageFilter<DoubleVectorImageType, TImageType>*>(m_OutputCaster.GetPointer())->GetOutput();
    }
    else
    {
      if (m_OutputCaster.IsNotNull())
      {
        itkExceptionMacro(
            "GetImage() was already called with a different type, "
            "probably due to two calls to GetParameter<Type>Image with different types in application code.");
      }
      CLAMP_IMAGE_BASE(TImageType, m_Image.GetPointer());
    }
  }
}

/** declare a specialization for ImageBaseType */
template <>
OTBApplicationEngine_EXPORT ImageBaseType* InputImageParameter::GetImage<ImageBaseType>();


} // End namespace Wrapper
} // End namespace otb

#endif