/*
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 *     with the distribution.
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 *     contributors may be used to endorse or promote products derived
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 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * $Id: segment_differences.cpp 35361 2011-01-20 04:34:49Z rusu $
 *
 */

#include <pluginlib/class_list_macros.h>
#include "pcl_ros/segmentation/segment_differences.h"

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void
pcl_ros::SegmentDifferences::onInit ()
{
  // Call the super onInit ()
  PCLNodelet::onInit ();

  pub_output_ = advertise<PointCloud> (*pnh_, "output", max_queue_size_);

  NODELET_DEBUG ("[%s::onInit] Nodelet successfully created with the following parameters:\n"
                 " - max_queue_size    : %d",
                 getName ().c_str (),
                 max_queue_size_);

  onInitPostProcess ();
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void
pcl_ros::SegmentDifferences::subscribe ()
{
  // Subscribe to the input using a filter
  sub_input_filter_.subscribe (*pnh_, "input", max_queue_size_);
  sub_target_filter_.subscribe (*pnh_, "target", max_queue_size_);

  // Enable the dynamic reconfigure service
  srv_ = boost::make_shared <dynamic_reconfigure::Server<SegmentDifferencesConfig> > (*pnh_);
  dynamic_reconfigure::Server<SegmentDifferencesConfig>::CallbackType f =  boost::bind (&SegmentDifferences::config_callback, this, _1, _2);
  srv_->setCallback (f);

  if (approximate_sync_)
  {
    sync_input_target_a_ = boost::make_shared <message_filters::Synchronizer<sync_policies::ApproximateTime<PointCloud, PointCloud> > > (max_queue_size_);
    sync_input_target_a_->connectInput (sub_input_filter_, sub_target_filter_);
    sync_input_target_a_->registerCallback (bind (&SegmentDifferences::input_target_callback, this, _1, _2));
  }
  else
  {
    sync_input_target_e_ = boost::make_shared <message_filters::Synchronizer<sync_policies::ExactTime<PointCloud, PointCloud> > > (max_queue_size_);
    sync_input_target_e_->connectInput (sub_input_filter_, sub_target_filter_);
    sync_input_target_e_->registerCallback (bind (&SegmentDifferences::input_target_callback, this, _1, _2));
  }
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void
pcl_ros::SegmentDifferences::unsubscribe ()
{
  sub_input_filter_.unsubscribe ();
  sub_target_filter_.unsubscribe ();
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void
pcl_ros::SegmentDifferences::config_callback (SegmentDifferencesConfig &config, uint32_t /*level*/)
{
  if (impl_.getDistanceThreshold () != config.distance_threshold)
  {
    impl_.setDistanceThreshold (config.distance_threshold);
    NODELET_DEBUG ("[%s::config_callback] Setting new distance threshold to: %f.", getName ().c_str (), config.distance_threshold);
  }
}


//////////////////////////////////////////////////////////////////////////////////////////////
void
pcl_ros::SegmentDifferences::input_target_callback (const PointCloudConstPtr &cloud, 
                                                    const PointCloudConstPtr &cloud_target)
{
  if (pub_output_.getNumSubscribers () <= 0)
    return;

  if (!isValid (cloud) || !isValid (cloud_target, "target")) 
  {
    NODELET_ERROR ("[%s::input_indices_callback] Invalid input!", getName ().c_str ());
    PointCloud output;
    output.header = cloud->header;
    pub_output_.publish (ros_ptr(output.makeShared ()));
    return;
  }

  NODELET_DEBUG ("[%s::input_indices_callback]\n"
                 "                                 - PointCloud with %d data points (%s), stamp %f, and frame %s on topic %s received.\n"
                 "                                 - PointCloud with %d data points (%s), stamp %f, and frame %s on topic %s received.",
                 getName ().c_str (),
                 cloud->width * cloud->height, pcl::getFieldsList (*cloud).c_str (), fromPCL(cloud->header).stamp.toSec (), cloud->header.frame_id.c_str (), pnh_->resolveName ("input").c_str (),
                 cloud_target->width * cloud_target->height, pcl::getFieldsList (*cloud_target).c_str (), fromPCL(cloud_target->header).stamp.toSec (), cloud_target->header.frame_id.c_str (), pnh_->resolveName ("target").c_str ());

  impl_.setInputCloud (pcl_ptr(cloud));
  impl_.setTargetCloud (pcl_ptr(cloud_target));

  PointCloud output;
  impl_.segment (output);

  pub_output_.publish (ros_ptr(output.makeShared ()));
  NODELET_DEBUG ("[%s::segmentAndPublish] Published PointCloud2 with %zu points and stamp %f on topic %s", getName ().c_str (),
                     output.points.size (), fromPCL(output.header).stamp.toSec (), pnh_->resolveName ("output").c_str ());
}

typedef pcl_ros::SegmentDifferences SegmentDifferences;
PLUGINLIB_EXPORT_CLASS(SegmentDifferences, nodelet::Nodelet)

