/*
 * Software License Agreement (BSD License)
 *
 *  Copyright (c) 2011, Willow Garage, Inc.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     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.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 *
 * Author: Julius Kammerl (julius@kammerl.de)
 */

#include <pcl/common/time.h>
#include <pcl/compression/octree_pointcloud_compression.h>
#include <pcl/console/parse.h>
#include <pcl/filters/passthrough.h>
#include <pcl/io/openni_grabber.h>
#include <pcl/visualization/cloud_viewer.h>
#include <pcl/point_cloud.h>
#include <pcl/point_types.h>

#include <boost/asio.hpp>

#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <sstream>
#include <string>
#include <thread>
#include <vector>

using boost::asio::ip::tcp;

using namespace pcl;
using namespace pcl::io;

using namespace std;
using namespace std::chrono_literals;

// clang-format off
char usage[] = "\n"
  "  PCL octree point cloud compression\n"
  "\n"
  "  usage: ./pcl_openni_octree_compression [mode] [profile] [parameters]\n"
  "\n"
  "  I/O: \n"
  "      -f file  : file name \n"
  "\n"
  "  file compression mode:\n"
  "      -x: encode point cloud stream to file\n"
  "      -d: decode from file and display point cloud stream\n"
  "\n"
  "  network streaming mode:\n"
  "      -s       : start server on localhost\n"
  "      -c host  : connect to server and display decoded cloud stream\n"
  "\n"
  "  optional compression profile: \n"
  "      -p profile : select compression profile:       \n"
  "                     -\"lowC\"  Low resolution with color\n"
  "                     -\"lowNC\" Low resolution without color\n"
  "                     -\"medC\" Medium resolution with color\n"
  "                     -\"medNC\" Medium resolution without color\n"
  "                     -\"highC\" High resolution with color\n"
  "                     -\"highNC\" High resolution without color\n"
  "\n"
  "  optional compression parameters:\n"
  "      -r prec  : point precision Hz\n"
  "      -o prec  : octree voxel size\n"
  "      -v       : enable voxel-grid downsampling\n"
  "      -a       : enable color coding\n"
  "      -i rate  : i-frame rate\n"
  "      -b bits  : bits/color component\n"
  "      -t       : output statistics\n"
  "      -e       : show input cloud during encoding\n"
  "\n"
  "      -minmax min-max  :: set the PassThrough min-max cutting values (default: 0-3.0)\n"
  "      -field  X        :: set the PassThrough field/dimension 'X' to filter data on (default: 'z')\n"
  "\n"
  "  example:\n"
  "      ./pcl_openni_octree_compression -x -p highC -t -f pc_compressed.pcc \n"
  "\n";
// clang-format on

// clang-format off
#define FPS_CALC(_WHAT_)                                                               \
  do {                                                                                 \
    static unsigned count = 0;                                                         \
    static double last = pcl::getTime();                                               \
    double now = pcl::getTime();                                                       \
    ++count;                                                                           \
    if (now - last >= 1.0) {                                                           \
      std::cout << "Average framerate(" << _WHAT_ << "): "                             \
                << double(count) / double(now - last) << " Hz" << std::endl;           \
      count = 0;                                                                       \
      last = now;                                                                      \
    }                                                                                  \
  } while (false)
// clang-format on

void
print_usage(const std::string& msg)
{
  std::cerr << msg << std::endl;
  std::cout << usage << std::endl;
}

class SimpleOpenNIViewer {
public:
  SimpleOpenNIViewer(ostream& outputFile_arg,
                     OctreePointCloudCompression<PointXYZRGBA>* octreeEncoder_arg)
  : viewer("Input Point Cloud - PCL Compression Viewer")
  , outputFile_(outputFile_arg)
  , octreeEncoder_(octreeEncoder_arg)
  {}

  void
  cloud_cb_(const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr& cloud)
  {
    if (!viewer.wasStopped()) {
      PointCloud<PointXYZRGBA>::Ptr cloudOut(new PointCloud<PointXYZRGBA>);

      octreeEncoder_->encodePointCloud(cloud, outputFile_);

      viewer.showCloud(cloud);
    }
  }

  void
  run()
  {

    // create a new grabber for OpenNI devices
    pcl::OpenNIGrabber interface{};

    // make callback function from member function
    std::function<void(const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr&)> f =
        [this](const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr& cloud) {
          cloud_cb_(cloud);
        };

    // connect callback function for desired signal. In this case its a point cloud with
    // color values
    boost::signals2::connection c = interface.registerCallback(f);

    // start receiving point clouds
    interface.start();

    while (!outputFile_.fail()) {
      std::this_thread::sleep_for(1s);
    }

    interface.stop();
  }

  pcl::visualization::CloudViewer viewer;
  ostream& outputFile_;
  OctreePointCloudCompression<PointXYZRGBA>* octreeEncoder_;
};

struct EventHelper {
  EventHelper(ostream& outputFile_arg,
              OctreePointCloudCompression<PointXYZRGBA>* octreeEncoder_arg,
              const std::string& field_name = "z",
              float min_v = 0,
              float max_v = 3.0)
  : outputFile_(outputFile_arg), octreeEncoder_(octreeEncoder_arg)
  {
    pass_.setFilterFieldName(field_name);
    pass_.setFilterLimits(min_v, max_v);
  }

  void
  cloud_cb_(const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr& cloud)
  {
    if (!outputFile_.fail()) {
      PointCloud<PointXYZRGBA>::Ptr cloud_out(new PointCloud<PointXYZRGBA>);

      // Use a PassThrough filter to clean NaNs and remove data which is not interesting
      pass_.setInputCloud(cloud);
      pass_.filter(*cloud_out);

      octreeEncoder_->encodePointCloud(cloud_out, outputFile_);
    }
  }

  void
  run()
  {
    // create a new grabber for OpenNI devices
    pcl::OpenNIGrabber interface{};

    // make callback function from member function
    std::function<void(const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr&)> f =
        [this](const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr& cloud) {
          cloud_cb_(cloud);
        };

    // connect callback function for desired signal. In this case its a point cloud with
    // color values
    boost::signals2::connection c = interface.registerCallback(f);

    // start receiving point clouds
    interface.start();

    while (!outputFile_.fail()) {
      std::this_thread::sleep_for(1s);
    }

    interface.stop();
  }

  pcl::PassThrough<PointXYZRGBA> pass_;
  ostream& outputFile_;
  OctreePointCloudCompression<PointXYZRGBA>* octreeEncoder_;
};

int
main(int argc, char** argv)
{
  OctreePointCloudCompression<PointXYZRGBA>* octreeCoder;

  pcl::io::compression_Profiles_e compressionProfile;

  bool showStatistics;
  double pointResolution;
  float octreeResolution;
  bool doVoxelGridDownDownSampling;
  unsigned int iFrameRate;
  bool doColorEncoding;
  unsigned int colorBitResolution;

  bool bShowInputCloud;

  // default values
  showStatistics = false;
  pointResolution = 0.001;
  octreeResolution = 0.01f;
  doVoxelGridDownDownSampling = false;
  iFrameRate = 30;
  doColorEncoding = false;
  colorBitResolution = 6;
  compressionProfile = pcl::io::MED_RES_OFFLINE_COMPRESSION_WITHOUT_COLOR;

  bShowInputCloud = false;

  std::string fileName = "pc_compressed.pcc";
  std::string hostName = "localhost";

  bool bServerFileMode;
  bool bEnDecode;
  bool validArguments;

  validArguments = false;
  bServerFileMode = false;
  bEnDecode = false;

  float min_v = 0.0f, max_v = 3.0f;
  pcl::console::parse_2x_arguments(argc, argv, "-minmax", min_v, max_v, false);
  std::string field_name("z");
  pcl::console::parse_argument(argc, argv, "-field", field_name);

  if (pcl::console::find_argument(argc, argv, "-e") > 0)
    bShowInputCloud = true;

  if (pcl::console::find_argument(argc, argv, "-s") > 0) {
    bEnDecode = true;
    bServerFileMode = true;
    validArguments = true;
  }

  if (pcl::console::parse_argument(argc, argv, "-c", hostName) > 0) {
    bEnDecode = false;
    bServerFileMode = true;
    validArguments = true;
  }

  if (pcl::console::find_argument(argc, argv, "-x") > 0) {
    bEnDecode = true;
    bServerFileMode = false;
    validArguments = true;
  }

  if (pcl::console::find_argument(argc, argv, "-d") > 0) {
    bEnDecode = false;
    bServerFileMode = false;
    validArguments = true;
  }

  if (pcl::console::find_argument(argc, argv, "-t") > 0)
    showStatistics = true;

  if (pcl::console::find_argument(argc, argv, "-a") > 0) {
    doColorEncoding = true;
    compressionProfile = pcl::io::MANUAL_CONFIGURATION;
  }

  if (pcl::console::find_argument(argc, argv, "-v") > 0) {
    doVoxelGridDownDownSampling = true;
    compressionProfile = pcl::io::MANUAL_CONFIGURATION;
  }

  pcl::console::parse_argument(argc, argv, "-f", fileName);
  pcl::console::parse_argument(argc, argv, "-r", pointResolution);
  pcl::console::parse_argument(argc, argv, "-i", iFrameRate);
  pcl::console::parse_argument(argc, argv, "-o", octreeResolution);
  pcl::console::parse_argument(argc, argv, "-b", colorBitResolution);

  std::string profile;
  if (pcl::console::parse_argument(argc, argv, "-p", profile) > 0) {
    if (profile == "lowC")
      compressionProfile = pcl::io::LOW_RES_OFFLINE_COMPRESSION_WITH_COLOR;
    else if (profile == "lowNC")
      compressionProfile = pcl::io::LOW_RES_OFFLINE_COMPRESSION_WITHOUT_COLOR;
    else if (profile == "medC")
      compressionProfile = pcl::io::MED_RES_OFFLINE_COMPRESSION_WITH_COLOR;
    else if (profile == "medNC")
      compressionProfile = pcl::io::MED_RES_OFFLINE_COMPRESSION_WITHOUT_COLOR;
    else if (profile == "highC")
      compressionProfile = pcl::io::HIGH_RES_OFFLINE_COMPRESSION_WITH_COLOR;
    else if (profile == "highNC")
      compressionProfile = pcl::io::HIGH_RES_OFFLINE_COMPRESSION_WITHOUT_COLOR;
    else {
      print_usage("Unknown profile parameter..\n");
      return -1;
    }

    if (compressionProfile != MANUAL_CONFIGURATION) {
      // apply selected compression profile
      // retrieve profile settings
      const pcl::io::configurationProfile_t selectedProfile =
          pcl::io::compressionProfiles_[compressionProfile];

      // apply profile settings
      pointResolution = selectedProfile.pointResolution;
      octreeResolution = float(selectedProfile.octreeResolution);
      doVoxelGridDownDownSampling = selectedProfile.doVoxelGridDownSampling;
      iFrameRate = selectedProfile.iFrameRate;
      doColorEncoding = selectedProfile.doColorEncoding;
      colorBitResolution = selectedProfile.colorBitResolution;
    }
  }

  if (pcl::console::find_argument(argc, argv, "-?") > 0) {
    print_usage("");
    return 1;
  }

  if (!validArguments) {
    print_usage("Please specify compression mode..\n");
    return -1;
  }

  octreeCoder = new OctreePointCloudCompression<PointXYZRGBA>(
      compressionProfile,
      showStatistics,
      pointResolution,
      octreeResolution,
      doVoxelGridDownDownSampling,
      iFrameRate,
      doColorEncoding,
      static_cast<unsigned char>(colorBitResolution));

  if (!bServerFileMode) {
    if (bEnDecode) {
      // ENCODING
      ofstream compressedPCFile;
      compressedPCFile.open(fileName.c_str(), ios::out | ios::trunc | ios::binary);

      if (!bShowInputCloud) {
        EventHelper v(compressedPCFile, octreeCoder, field_name, min_v, max_v);
        v.run();
      }
      else {
        SimpleOpenNIViewer v(compressedPCFile, octreeCoder);
        v.run();
      }
    }
    else {
      // DECODING
      ifstream compressedPCFile;
      compressedPCFile.open(fileName.c_str(), ios::in | ios::binary);
      compressedPCFile.seekg(0);
      compressedPCFile.unsetf(ios_base::skipws);

      pcl::visualization::CloudViewer viewer("PCL Compression Viewer");

      while (!compressedPCFile.eof()) {
        PointCloud<PointXYZRGBA>::Ptr cloudOut(new PointCloud<PointXYZRGBA>());
        octreeCoder->decodePointCloud(compressedPCFile, cloudOut);
        viewer.showCloud(cloudOut);
      }
    }
  }
  else {
    if (bEnDecode) {
      // ENCODING
      try {
        boost::asio::io_service io_service;
        tcp::endpoint endpoint(tcp::v4(), 6666);
        tcp::acceptor acceptor(io_service, endpoint);

        tcp::iostream socketStream;

        std::cout << "Waiting for connection.." << std::endl;

        acceptor.accept(*socketStream.rdbuf());

        std::cout << "Connected!" << std::endl;

        if (!bShowInputCloud) {
          EventHelper v(socketStream, octreeCoder, field_name, min_v, max_v);
          v.run();
        }
        else {
          SimpleOpenNIViewer v(socketStream, octreeCoder);
          v.run();
        }

        std::cout << "Disconnected!" << std::endl;

        std::this_thread::sleep_for(3s);

      } catch (std::exception& e) {
        std::cerr << e.what() << std::endl;
      }
    }
    else {
      // DECODING
      std::cout << "Connecting to: " << hostName << ".." << std::endl;

      try {
        tcp::iostream socketStream(hostName.c_str(), "6666");

        std::cout << "Connected!" << std::endl;

        pcl::visualization::CloudViewer viewer(
            "Decoded Point Cloud - PCL Compression Viewer");

        while (!socketStream.fail()) {
          FPS_CALC("drawing");
          PointCloud<PointXYZRGBA>::Ptr cloudOut(new PointCloud<PointXYZRGBA>());
          octreeCoder->decodePointCloud(socketStream, cloudOut);
          viewer.showCloud(cloudOut);
        }

      } catch (std::exception& e) {
        std::cout << "Exception: " << e.what() << std::endl;
      }
    }
  }

  delete octreeCoder;
  return 0;
}
