/**
* @file computeLocalFeatures.cpp
* @brief compute some features for training and testing (separate specifications possible)
* @author Alexander Freytag
* @date 14-06-2013
*/

//STL
#include <iostream>
#include <limits>

//core -- basic stuff
#include <core/basics/Config.h>
#include <core/basics/ResourceStatistics.h>
#include <core/basics/Timer.h>
#include <core/image/Convert.h>
#include <core/vector/VectorT.h>

//vislearning -- basic stuff
#include <vislearning/baselib/Globals.h>
#include <vislearning/baselib/ICETools.h>
#include <vislearning/cbaselib/MultiDataset.h>
#include <vislearning/cbaselib/Example.h>
#include <vislearning/cbaselib/ClassificationResult.h>
#include <vislearning/cbaselib/ClassificationResults.h>
// vislearning -- local features
#include <vislearning/features/localfeatures/GenericLFSelection.h>
//

using namespace std;
using namespace NICE;
using namespace OBJREC;

/**
 a complete BoW pipeline
 
 possibly, we can make use of objrec/progs/testClassifier.cpp
*/
int main( int argc, char **argv )
{
#ifndef __clang__
#ifndef __llvm__
  std::set_terminate( __gnu_cxx::__verbose_terminate_handler );
#endif
#endif

  NICE::Config * conf = new NICE::Config ( argc, argv );
  
  const std::string resultsfile = conf->gS( "main", "resultsfile", "/tmp/results.txt" );
  
  ResourceStatistics rs;
  
  // ========================================================================
  //                            TRAINING STEP
  // ========================================================================

  MultiDataset md( conf );
  const LabeledSet *trainFiles = md["train"];  
   
  //**********************************************
  //
  //     FEATURE EXTRACTION FOR TRAINING IMAGES
  //
  //**********************************************  
  
  std::cerr << "FEATURE EXTRACTION FOR TRAINING IMAGES" << std::endl;
  
  OBJREC::LocalFeatureRepresentation * featureExtractor = OBJREC::GenericLFSelection::selectLocalFeatureRep ( conf, "features", OBJREC::GenericLFSelection::TRAINING );
  
  
  //TODO replace the nasty makro by a suitable for-loop to make it omp-ready (parallelization)
  int imgCnt ( 0 );
   
  // the corresponding nasty makro: LOOP_ALL_S( *trainFiles )
  for(LabeledSet::const_iterator classIt = trainFiles->begin() ; classIt != trainFiles->end() ; classIt++)
  {
    for ( std::vector<ImageInfo *>::const_iterator imgIt = classIt->second.begin(); 
          imgIt != classIt->second.end(); 
          imgIt++, imgCnt++
        ) 
    {
      // the corresponding nasty makro: EACH_INFO( classno, info );
      int classno ( classIt->first );
      const ImageInfo imgInfo = *(*imgIt);      
      
      std::string filename = imgInfo.img();      
      
      NICE::ColorImage img( filename );
  
      //compute features
      
      //variables to store feature information
      NICE::VVector features;
      NICE::VVector positions;
  
      Globals::setCurrentImgFN ( filename );
      featureExtractor->extractFeatures ( img, features, positions );  
              
    }
  }
  
  
  // ========================================================================
  //                            TEST STEP
  // ========================================================================
  
  const LabeledSet *testFiles = md["test"];

  delete featureExtractor;
  featureExtractor = OBJREC::GenericLFSelection::selectLocalFeatureRep ( conf, "features", OBJREC::GenericLFSelection::TESTING );  
  
  LOOP_ALL_S( *testFiles )
  {
      EACH_INFO( classno, info );
      std::string filename = info.img();
  
      //**********************************************
      //
      //     FEATURE EXTRACTION FOR TEST IMAGES
      //
      //**********************************************  
      
      NICE::ColorImage img( filename );
  
      //compute features
      
      //variables to store feature information
      NICE::VVector features;
      NICE::VVector positions;
  
      Globals::setCurrentImgFN ( filename );
      featureExtractor->extractFeatures ( img, features, positions );  

  }

  
   return 0;
}