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#ifndef PCL_CUDA_FILTER_H_
#define PCL_CUDA_FILTER_H_

#include <pcl_cuda/pcl_cuda_base.h>
#include <float.h>

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

  ////////////////////////////////////////////////////////////////////////////////////////////
  /** \brief @b Filter represents the base filter class. Some generic 3D
    * operations that are applicable to all filters are defined here as static
    * methods.
    */
  template <typename CloudT>
  class Filter : public PCLCUDABase<CloudT>
  {
    using PCLCUDABase<CloudT>::initCompute;
    using PCLCUDABase<CloudT>::deinitCompute;

    public:
      using PCLCUDABase<CloudT>::input_;

      typedef typename PCLCUDABase<CloudT>::PointCloud PointCloud;
      typedef typename PointCloud::Ptr PointCloudPtr;
      typedef typename PointCloud::ConstPtr PointCloudConstPtr;

      /** \brief Empty constructor. */
      Filter () : filter_field_name_ (""), 
                  filter_limit_min_ (-FLT_MAX), filter_limit_max_ (FLT_MAX), 
                  filter_limit_negative_ (false)
      {};

      /** \brief Provide the name of the field to be used for filtering data.
        * In conjunction with  \a setFilterLimits, points having values outside
        * this interval will be discarded.
        * \param field_name the name of the field that contains values used for filtering
        */
      inline void 
      setFilterFieldName (const std::string &field_name) { filter_field_name_ = field_name; }

      /** \brief Get the name of the field used for filtering. */
      inline std::string const 
      getFilterFieldName () { return (filter_field_name_); }

      /** \brief Set the field filter limits. All points having field values
        * outside this interval will be discarded.  
        * \param limit_min the minimum allowed field value
        * \param limit_max the maximum allowed field value
        */
      inline void
      setFilterLimits (const double &limit_min, const double &limit_max)
      {
        filter_limit_min_ = limit_min;
        filter_limit_max_ = limit_max;
      }

      /** \brief Get the field filter limits (min/max) set by the user. 
        * The default values are -FLT_MAX, FLT_MAX. 
        * \param limit_min the minimum limit
        * \param limit_max the maximum limit
        */
      inline void
      getFilterLimits (double &limit_min, double &limit_max)
      {
        limit_min = filter_limit_min_;
        limit_max = filter_limit_max_;
      }

      /** \brief Set to true if we want to return the data outside the interval
        * specified by setFilterLimits (min, max).  Default: false.
        * \param limit_negative return data inside the interval (false) or outside (true)
        */
      inline void 
      setFilterLimitsNegative (const bool limit_negative) 
      { 
        filter_limit_negative_ = limit_negative; 
      }

      /** \brief Get whether the data outside the interval (min/max) is to be
        * returned (true) or inside (false). 
        * \param limit_negative the limit_negative flag
        */
      inline void 
      getFilterLimitsNegative (bool &limit_negative) { limit_negative = filter_limit_negative_; }
      inline bool 
      getFilterLimitsNegative () { return (filter_limit_negative_); }

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

        // Copy header at a minimum
        //output.header = input_->header;
        //output.sensor_origin_ = input_->sensor_origin_;
        //output.sensor_orientation_ = input_->sensor_orientation_;

        // Apply the actual filter
        applyFilter (output);

        deinitCompute ();
      }

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

      /** \brief The desired user filter field name. */
      std::string filter_field_name_;

      /** \brief The minimum allowed filter value a point will be considered from. */
      double filter_limit_min_;

      /** \brief The maximum allowed filter value a point will be considered from. */
      double filter_limit_max_;

      /** \brief Set to true if we want to return the data outside (\a filter_limit_min_;\a filter_limit_max_). Default: false. */
      bool filter_limit_negative_;

      /** \brief Abstract filter method. 
        * 
        * The implementation needs to set output.{points, width, height, is_dense}.
        */
      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_); }
  };
}

#endif  //#ifndef PCL_FILTER_H_
