/*
 * Software License Agreement (BSD License)
 *
 *  Point Cloud Library (PCL) - www.pointclouds.org
 *  Copyright (c) 2010-2012, Willow Garage, Inc.
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 *     notice, this list of conditions and the following disclaimer.
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 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Willow Garage, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
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/*
 * orr_octree_zprojection.h
 *
 *  Created on: Nov 17, 2012
 *      Author: papazov
 */

#pragma once

#include "orr_octree.h"
#include <pcl/pcl_exports.h>
#include <set>

namespace pcl
{
  namespace recognition
  {
    class ORROctree;

    class PCL_EXPORTS ORROctreeZProjection
    {
      public:
        class Pixel
        {
          public:
            Pixel (int id): id_ (id) {}

            inline void
            set_z1 (float z1) { z1_ = z1;}

            inline void
            set_z2 (float z2) { z2_ = z2;}

            float
            z1 () const { return z1_;}

            float
            z2 () const { return z2_;}

            int
            getId () const { return id_;}

          protected:
            float z1_, z2_;
            int id_;
        };

      public:
        class Set
        {
          public:
        	Set (int x, int y)
        	: nodes_ (compare_nodes_z), x_ (x), y_ (y)
        	{}

            static inline bool
            compare_nodes_z (ORROctree::Node* node1, ORROctree::Node* node2)
            {
              return node1->getData()->get3dIdZ() < node2->getData()->get3dIdZ();
            }

            inline void
            insert (ORROctree::Node* leaf) { nodes_.insert(leaf);}

            inline std::set<ORROctree::Node*, bool(*)(ORROctree::Node*,ORROctree::Node*)>&
            get_nodes (){ return nodes_;}

            inline int
            get_x () const { return x_;}

            inline int
            get_y () const { return y_;}

          protected:
            std::set<ORROctree::Node*, bool(*)(ORROctree::Node*,ORROctree::Node*)> nodes_;
            int x_, y_;
        };

      public:
        ORROctreeZProjection ()
        : pixels_(nullptr),
          sets_(nullptr)
        {}
        virtual ~ORROctreeZProjection (){ this->clear();}

        void
        build (const ORROctree& input, float eps_front, float eps_back);

        void
        clear ();

        inline void
        getPixelCoordinates (const float* p, int& x, int& y) const
        {
        	x = static_cast<int> ((p[0] - bounds_[0])*inv_pixel_size_);
        	y = static_cast<int> ((p[1] - bounds_[2])*inv_pixel_size_);
        }

        inline const Pixel*
        getPixel (const float* p) const
        {
          int x, y; this->getPixelCoordinates (p, x, y);

          if ( x < 0 || x >= num_pixels_x_ ) return (nullptr);
          if ( y < 0 || y >= num_pixels_y_ ) return (nullptr);

          return (pixels_[x][y]);
        }

        inline Pixel*
        getPixel (const float* p)
        {
          int x, y; this->getPixelCoordinates (p, x, y);

          if ( x < 0 || x >= num_pixels_x_ ) return (nullptr);
          if ( y < 0 || y >= num_pixels_y_ ) return (nullptr);

          return (pixels_[x][y]);
        }

        inline const std::set<ORROctree::Node*, bool(*)(ORROctree::Node*,ORROctree::Node*)>*
        getOctreeNodes (const float* p) const
        {
          int x, y; this->getPixelCoordinates (p, x, y);

          if ( x < 0 || x >= num_pixels_x_ ) return (nullptr);
          if ( y < 0 || y >= num_pixels_y_ ) return (nullptr);

          if ( !sets_[x][y] )
            return nullptr;

          return (&sets_[x][y]->get_nodes ());
        }

        inline std::list<Pixel*>&
        getFullPixels (){ return full_pixels_;}

        inline const Pixel*
        getPixel (int i, int j) const
        {
          return pixels_[i][j];
        }

        inline float
        getPixelSize () const
        {
          return pixel_size_;
        }

        inline const float*
        getBounds () const
        {
          return bounds_;
        }

        /** \brief Get the width ('num_x') and height ('num_y') of the image. */
        inline void
        getNumberOfPixels (int& num_x, int& num_y) const
        {
          num_x = num_pixels_x_;
          num_y = num_pixels_y_;
        }

      protected:
        float pixel_size_, inv_pixel_size_, bounds_[4], extent_x_, extent_y_;
        int num_pixels_x_, num_pixels_y_, num_pixels_;
        Pixel ***pixels_;
        Set ***sets_;
        std::list<Set*> full_sets_;
        std::list<Pixel*> full_pixels_;
    };
  } // namespace recognition
} // namespace pcl
