#include "common.h"
#include "kbestget.h"
#include "util.h"


/*
 * init
 *
 */
bool
init(int argc, char** argv, po::variables_map* conf)
{
  int N;
  po::options_description opts( "Command Line Options" );
  opts.add_options()
    ( "decoder-config,c", po::value<string>(),                              "configuration file for cdec" )
    ( "weights,w",        po::value<string>(),                                             "weights file" )
    ( "ngrams,n",         po::value<int>(&N)->default_value(DTRAIN_DEFAULT_N), "N for Ngrams (default 5)" );
  po::options_description cmdline_options;
  cmdline_options.add(opts);
  po::store( parse_command_line(argc, argv, cmdline_options), *conf );
  po::notify( *conf );
  if ( ! (conf->count("decoder-config") || conf->count("weights")) ) {
    cerr << cmdline_options << endl;
    return false;
  }
  return true;
}


/*
 * main
 *
 */
int
main(int argc, char** argv)
{
  SetSilent( true );
  po::variables_map conf;
  if ( !init(argc, argv, &conf) ) return 1;
  register_feature_functions();
  size_t k = 1;
  ReadFile ini_rf( conf["decoder-config"].as<string>() );
  Decoder decoder( ini_rf.stream() );
  KBestGetter observer( k, "no" );
  size_t N = conf["ngrams"].as<int>();

  Weights weights;
  if ( conf.count("weights") ) weights.InitFromFile( conf["weights"].as<string>() );
  vector<double> w;
  weights.InitVector( &w );
  decoder.SetWeights( w );
 
  vector<string> in_split, ref_strs;
  vector<WordID> ref_ids;
  string in, psg;
  size_t sn = 0;
  double overall  = 0.0;
  double overall1 = 0.0;
  double overall2 = 0.0;
  while( getline(cin, in) ) {
    in_split.clear();
    boost::split( in_split, in, boost::is_any_of("\t") );
    // grammar
    psg = boost::replace_all_copy( in_split[3], " __NEXT__RULE__ ", "\n" ); psg += "\n";
    decoder.SetSentenceGrammarFromString( psg );
    decoder.Decode( in_split[1], &observer );
    KBestList* kb = observer.GetKBest();
    // reference
    ref_strs.clear(); ref_ids.clear();
    boost::split( ref_strs, in_split[2], boost::is_any_of(" ") );
    register_and_convert( ref_strs, ref_ids );
    // scoring kbest
    double score  = 0.0;
    double score1 = 0.0;
    double score2 = 0.0;
    NgramCounts counts = make_ngram_counts( ref_ids, kb->sents[0], N );
    score =  smooth_bleu( counts, ref_ids.size(), kb->sents[0].size(), N );
    score1 = stupid_bleu( counts, ref_ids.size(), kb->sents[0].size(), N );
    score2 =        bleu( counts, ref_ids.size(), kb->sents[0].size(), N );
    cout << TD::GetString( kb->sents[0] ) << endl;
    overall += score;
    overall1 += score1;
    overall2 += score2;
    sn += 1;
  }
  cerr << "Average score (smooth) : " << overall/(double)(sn+1) << endl;
  cerr << "Average score (stupid) : " << overall1/(double)(sn+1) << endl;
  cerr << "Average score (vanilla): " << overall2/(double)(sn+1) << endl;
  cerr << endl;

  return 0;
}