/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2020 Osimis S.A., Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include "RadiographyLayer.h"

#include <Core/Compatibility.h>
#include <Core/Images/Image.h>
#include <Core/Images/ImageProcessing.h>

namespace OrthancStone
{
  class RadiographyScene;
  class RadiographyDicomLayer;

  class RadiographyMaskLayer : public RadiographyLayer
  {
  private:
    std::vector<Orthanc::ImageProcessing::ImagePoint>            corners_;
    const RadiographyDicomLayer&      dicomLayer_;
    mutable bool                      invalidated_;
    float                             foreground_;

    mutable std::unique_ptr<Orthanc::ImageAccessor>  mask_;
  public:
    RadiographyMaskLayer(MessageBroker& broker, const RadiographyScene& scene, const RadiographyDicomLayer& dicomLayer,
                         float foreground) :
      RadiographyLayer(broker, scene),
      dicomLayer_(dicomLayer),
      invalidated_(true),
      foreground_(foreground)
    {
    }

    virtual size_t GetApproximateMemoryUsage() const
    {
      size_t size = 0;
      if (mask_.get() != NULL)
      {
        size += mask_->GetPitch() * mask_->GetHeight();
      }

      return size;
    }


    void SetCorners(const std::vector<Orthanc::ImageProcessing::ImagePoint>& corners);
    void SetCorner(const Orthanc::ImageProcessing::ImagePoint& corner, size_t index);

    const std::vector<Orthanc::ImageProcessing::ImagePoint>& GetCorners() const
    {
      return corners_;
    }

    float GetForeground() const
    {
      return foreground_;
    }

    virtual void Render(Orthanc::ImageAccessor& buffer,
                        const AffineTransform2D& viewTransform,
                        ImageInterpolation interpolation,
                        float windowCenter,
                        float windowWidth,
                        bool applyWindowing) const;

    std::string GetInstanceId() const;

    virtual size_t GetControlPointCount() const
    {
      return corners_.size();
    }

    virtual void GetControlPoint(ControlPoint& cpScene,
                                         size_t index) const
    {
      ControlPoint cp(corners_[index].GetX(), corners_[index].GetY(), index);

      // transforms image coordinates into scene coordinates
      GetTransform().Apply(cp.x, cp.y);
      cpScene = cp;
    }

    virtual Extent2D GetSceneExtent(bool minimal) const;

    virtual bool GetDefaultWindowing(float& center,
                                     float& width) const
    {
      return false;
    }

    virtual bool GetRange(float& minValue,
                          float& maxValue) const
    {
      minValue = 0;
      maxValue = 0;

      if (foreground_ < 0)
      {
        minValue = foreground_;
      }

      if (foreground_ > 0)
      {
        maxValue = foreground_;
      }

      return true;

    }

    virtual bool GetPixel(unsigned int& imageX,
                          unsigned int& imageY,
                          double sceneX,
                          double sceneY) const;

  protected:
    virtual const AffineTransform2D& GetTransform() const;

    virtual const AffineTransform2D& GetTransformInverse() const;


  private:
    void DrawMask() const;

  };
}