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#include <pcl/io/openni_grabber.h>
#include <pcl/visualization/cloud_viewer.h>
#include <pcl/visualization/pcl_visualizer.h>
#include <pcl/io/io.h>
#include <pcl/common/time.h>
#include <pcl/features/integral_image_normal.h>
#include <pcl/features/normal_3d.h>
#include <pcl/ModelCoefficients.h>
#include <pcl/segmentation/planar_region.h>
#include <pcl/segmentation/organized_multi_plane_segmentation.h>
#include <pcl/segmentation/organized_connected_component_segmentation.h>
#include <pcl/filters/extract_indices.h>

typedef pcl::PointXYZRGBA PointT;

class OpenNIOrganizedMultiPlaneSegmentation
{
  private:
    boost::shared_ptr<pcl::visualization::PCLVisualizer> viewer;
    pcl::PointCloud<PointT>::ConstPtr prev_cloud;
    boost::mutex cloud_mutex;

  public:
    OpenNIOrganizedMultiPlaneSegmentation ()
    {

    }
    ~OpenNIOrganizedMultiPlaneSegmentation ()
    {
    }

    boost::shared_ptr<pcl::visualization::PCLVisualizer>
    cloudViewer (pcl::PointCloud<PointT>::ConstPtr cloud)
    {
      boost::shared_ptr < pcl::visualization::PCLVisualizer> viewer (new pcl::visualization::PCLVisualizer ("Viewer"));
      viewer->setBackgroundColor (0, 0, 0);
      pcl::visualization::PointCloudColorHandlerCustom<PointT> single_color (cloud, 0, 255, 0);
      viewer->addPointCloud<PointT> (cloud, single_color, "cloud");
      viewer->setPointCloudRenderingProperties (pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 1, "cloud");
      viewer->setPointCloudRenderingProperties (pcl::visualization::PCL_VISUALIZER_OPACITY, 0.15, "cloud");
      viewer->addCoordinateSystem (1.0);
      viewer->initCameraParameters ();
      return (viewer);
    }

    void
    cloud_cb_ (const pcl::PointCloud<PointT>::ConstPtr& cloud)
    {
      if (!viewer->wasStopped ())
      {
        cloud_mutex.lock ();
        prev_cloud = cloud;
        cloud_mutex.unlock ();
      }
    }

    void
    removePreviousDataFromScreen (size_t prev_models_size)
    {
      char name[1024];
      for (size_t i = 0; i < prev_models_size; i++)
      {
        sprintf (name, "normal_%zu", i);
        viewer->removeShape (name);

        sprintf (name, "plane_%02zu", i);
        viewer->removePointCloud (name);
      }
    }

    void
    run ()
    {
      pcl::Grabber* interface = new pcl::OpenNIGrabber ();

      boost::function<void(const pcl::PointCloud<PointT>::ConstPtr&)> f = boost::bind (&OpenNIOrganizedMultiPlaneSegmentation::cloud_cb_, this, _1);

      //make a viewer
      pcl::PointCloud<PointT>::Ptr init_cloud_ptr (new pcl::PointCloud<PointT>);
      viewer = cloudViewer (init_cloud_ptr);
      boost::signals2::connection c = interface->registerCallback (f);

      interface->start ();

      unsigned char red [6] = {255,   0,   0, 255, 255,   0};
      unsigned char grn [6] = {  0, 255,   0, 255,   0, 255};
      unsigned char blu [6] = {  0,   0, 255,   0, 255, 255};

      pcl::IntegralImageNormalEstimation<PointT, pcl::Normal> ne;
      ne.setNormalEstimationMethod (ne.COVARIANCE_MATRIX);
      ne.setMaxDepthChangeFactor (0.03f);
      ne.setNormalSmoothingSize (20.0f);

      pcl::OrganizedMultiPlaneSegmentation<PointT, pcl::Normal, pcl::Label> mps;
      mps.setMinInliers (10000);
      mps.setAngularThreshold (0.017453 * 2.0); //3 degrees
      mps.setDistanceThreshold (0.02); //2cm

      std::vector<pcl::PlanarRegion<PointT>, Eigen::aligned_allocator<pcl::PlanarRegion<PointT> > > regions;
      pcl::PointCloud<PointT>::Ptr contour (new pcl::PointCloud<PointT>);
      size_t prev_models_size = 0;
      char name[1024];

      while (!viewer->wasStopped ())
      {
        viewer->spinOnce (100);

        if (prev_cloud && cloud_mutex.try_lock ())
        {
          regions.clear ();
          pcl::PointCloud<pcl::Normal>::Ptr normal_cloud (new pcl::PointCloud<pcl::Normal>);
          double normal_start = pcl::getTime ();
          ne.setInputCloud (prev_cloud);
          ne.compute (*normal_cloud);
          double normal_end = pcl::getTime ();
          std::cout << "Normal Estimation took " << double (normal_end - normal_start) << std::endl;

          double plane_extract_start = pcl::getTime ();
          mps.setInputNormals (normal_cloud);
          mps.setInputCloud (prev_cloud);
          mps.segmentAndRefine (regions);
          double plane_extract_end = pcl::getTime ();
          std::cout << "Plane extraction took " << double (plane_extract_end - plane_extract_start) << std::endl;
          std::cout << "Frame took " << double (plane_extract_end - normal_start) << std::endl;

          pcl::PointCloud<PointT>::Ptr cluster (new pcl::PointCloud<PointT>);

          if (!viewer->updatePointCloud<PointT> (prev_cloud, "cloud"))
            viewer->addPointCloud<PointT> (prev_cloud, "cloud");

          removePreviousDataFromScreen (prev_models_size);
          //Draw Visualization
          for (size_t i = 0; i < regions.size (); i++)
          {
            Eigen::Vector3f centroid = regions[i].getCentroid ();
            Eigen::Vector4f model = regions[i].getCoefficients ();
            pcl::PointXYZ pt1 = pcl::PointXYZ (centroid[0], centroid[1], centroid[2]);
            pcl::PointXYZ pt2 = pcl::PointXYZ (centroid[0] + (0.5f * model[0]),
                                               centroid[1] + (0.5f * model[1]),
                                               centroid[2] + (0.5f * model[2]));
            sprintf (name, "normal_%zu", i);
            viewer->addArrow (pt2, pt1, 1.0, 0, 0, false, name);

            contour->points = regions[i].getContour ();
            sprintf (name, "plane_%02zu", i);
            pcl::visualization::PointCloudColorHandlerCustom <PointT> color (contour, red[i], grn[i], blu[i]);
            viewer->addPointCloud (contour, color, name);
            viewer->setPointCloudRenderingProperties (pcl::visualization::PCL_VISUALIZER_POINT_SIZE, 4, name);
          }
          prev_models_size = regions.size ();
          cloud_mutex.unlock ();
        }
      }

      interface->stop ();
    }
};

int
main ()
{
  OpenNIOrganizedMultiPlaneSegmentation multi_plane_app;
  multi_plane_app.run ();
  return 0;
}
