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 *  Point Cloud Library (PCL) - www.pointclouds.org
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 * $Id$
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#pragma once

#include <pcl/pcl_base.h>
#include <pcl/common/io.h> // for copyPointCloud
#include <pcl/PointIndices.h>

namespace pcl
{
  /** \brief Removes points with x, y, or z equal to NaN
    * \param[in] cloud_in the input point cloud
    * \param[out] cloud_out the output point cloud
    * \param[out] index the mapping (ordered): cloud_out[i] = cloud_in[index[i]]
    * \note The density of the point cloud is lost.
    * \note Can be called with cloud_in == cloud_out
    * \ingroup filters
    */
  template<typename PointT> void
  removeNaNFromPointCloud (const pcl::PointCloud<PointT> &cloud_in,
                           pcl::PointCloud<PointT> &cloud_out,
                           Indices &index);

  /** \brief Removes points that have their normals invalid (i.e., equal to NaN)
    * \param[in] cloud_in the input point cloud
    * \param[out] cloud_out the output point cloud
    * \param[out] index the mapping (ordered): cloud_out[i] = cloud_in[index[i]]
    * \note The density of the point cloud is lost.
    * \note Can be called with cloud_in == cloud_out
    * \ingroup filters
    */
  template<typename PointT> void
  removeNaNNormalsFromPointCloud (const pcl::PointCloud<PointT> &cloud_in,
                                  pcl::PointCloud<PointT> &cloud_out,
                                  Indices &index);

  ////////////////////////////////////////////////////////////////////////////////////////////
  /** \brief Filter represents the base filter class. All filters must inherit from this interface.
    * \author Radu B. Rusu
    * \ingroup filters
    */
  template<typename PointT>
  class Filter : public PCLBase<PointT>
  {
    public:
      using Ptr = shared_ptr<Filter<PointT> >;
      using ConstPtr = shared_ptr<const Filter<PointT> >;


      using PointCloud = pcl::PointCloud<PointT>;
      using PointCloudPtr = typename PointCloud::Ptr;
      using PointCloudConstPtr = typename PointCloud::ConstPtr;

      /** \brief Empty constructor.
        * \param[in] extract_removed_indices set to true if the filtered data indices should be saved in a
        * separate list. Default: false.
        */
      Filter (bool extract_removed_indices = false) :
        removed_indices_ (new Indices),
        extract_removed_indices_ (extract_removed_indices)
      {
      }

      /** \brief Get the point indices being removed */
      inline IndicesConstPtr const
      getRemovedIndices () const
      {
        return (removed_indices_);
      }

      /** \brief Get the point indices being removed
        * \param[out] pi the resultant point indices that have been removed
        */
      inline void
      getRemovedIndices (PointIndices &pi)
      {
        pi.indices = *removed_indices_;
      }

      /** \brief Calls the filtering method and returns the filtered dataset in output.
        * \param[out] output the resultant filtered point cloud dataset
        */
      inline void
      filter (PointCloud &output)
      {
        if (!initCompute ())
          return;

        if (input_.get () == &output)  // cloud_in = cloud_out
        {
          PointCloud output_temp;
          applyFilter (output_temp);
          output_temp.header = input_->header;
          output_temp.sensor_origin_ = input_->sensor_origin_;
          output_temp.sensor_orientation_ = input_->sensor_orientation_;
          pcl::copyPointCloud (output_temp, output);
        }
        else
        {
          output.header = input_->header;
          output.sensor_origin_ = input_->sensor_origin_;
          output.sensor_orientation_ = input_->sensor_orientation_;
          applyFilter (output);
        }

        deinitCompute ();
      }

    protected:

      using PCLBase<PointT>::indices_;
      using PCLBase<PointT>::input_;

      using PCLBase<PointT>::initCompute;
      using PCLBase<PointT>::deinitCompute;

      /** \brief Indices of the points that are removed */
      IndicesPtr removed_indices_;

      /** \brief The filter name. */
      std::string filter_name_;

      /** \brief Set to true if we want to return the indices of the removed points. */
      bool extract_removed_indices_;

      /** \brief Abstract filter method.
        *
        * The implementation needs to set output.{points, width, height, is_dense}.
        *
        * \param[out] output the resultant filtered point cloud
        */
      virtual void
      applyFilter (PointCloud &output) = 0;

      /** \brief Get a string representation of the name of this class. */
      inline const std::string&
      getClassName () const
      {
        return (filter_name_);
      }
  };

  ////////////////////////////////////////////////////////////////////////////////////////////
  /** \brief Filter represents the base filter class. All filters must inherit from this interface.
    * \author Radu B. Rusu
    * \ingroup filters
    */
  template<>
  class PCL_EXPORTS Filter<pcl::PCLPointCloud2> : public PCLBase<pcl::PCLPointCloud2>
  {
    public:
      using Ptr = shared_ptr<Filter<pcl::PCLPointCloud2> >;
      using ConstPtr = shared_ptr<const Filter<pcl::PCLPointCloud2> >;

      using PCLPointCloud2 = pcl::PCLPointCloud2;
      using PCLPointCloud2Ptr = PCLPointCloud2::Ptr;
      using PCLPointCloud2ConstPtr = PCLPointCloud2::ConstPtr;

      /** \brief Empty constructor.
        * \param[in] extract_removed_indices set to true if the filtered data indices should be saved in a
        * separate list. Default: false.
        */
      Filter (bool extract_removed_indices = false) :
        removed_indices_ (new Indices),
        extract_removed_indices_ (extract_removed_indices)
      {
      }

      /** \brief Get the point indices being removed */
      inline IndicesConstPtr const
      getRemovedIndices () const
      {
        return (removed_indices_);
      }

      /** \brief Get the point indices being removed
        * \param[out] pi the resultant point indices that have been removed
        */
      inline void
      getRemovedIndices (PointIndices &pi)
      {
        pi.indices = *removed_indices_;
      }

      /** \brief Calls the filtering method and returns the filtered dataset in output.
        * \param[out] output the resultant filtered point cloud dataset
        */
      void
      filter (PCLPointCloud2 &output);

    protected:

      /** \brief Indices of the points that are removed */
      IndicesPtr removed_indices_;

      /** \brief Set to true if we want to return the indices of the removed points. */
      bool extract_removed_indices_;

      /** \brief The filter name. */
      std::string filter_name_;

      /** \brief Abstract filter method.
        *
        * The implementation needs to set output.{data, row_step, point_step, width, height, is_dense}.
        *
        * \param[out] output the resultant filtered point cloud
        */
      virtual void
      applyFilter (PCLPointCloud2 &output) = 0;

      /** \brief Get a string representation of the name of this class. */
      inline const std::string&
      getClassName () const
      {
        return (filter_name_);
      }
  };
}

#ifdef PCL_NO_PRECOMPILE
#include <pcl/filters/impl/filter.hpp>
#endif
