#include <fstream>
#include <iostream>
#include <string>

#include <args.hxx>

#include "common.hh"


namespace param {
using namespace ::args;

ArgumentParser parser {
  "converter: feature -> block"
};
HelpFlag help {
  parser, "help", "display this menu", {'h', "help"},
};

ValueFlag<std::string> fmap {
  parser, "path", "path to feature map", {"fmap"},
};

}  // namespace param


static void Exec() {
  std::ifstream fmap_st {args::get(param::fmap)};
  Enforce(!!fmap_st, "fmap path is invalid");
  const auto fmap = ReadMatrix<uint32_t>(fmap_st);
  Enforce(fmap.size() > 0, "empty fmap");
  for (auto& idxs : fmap) {
    Enforce(idxs.size() > 0, "fmap has empty item");
  }

  size_t feat;
  while (std::cin >> feat) {
    Enforce(feat < fmap.size(), "feat overflow");

    for (const auto idx : fmap[feat]) {
      std::cout << idx << ' ';
    }
    std::cout << '\n';
  }
}

int main(int argc, char** argv)
try {
  param::parser.ParseCLI(argc, argv);
  Exec();
  return EXIT_SUCCESS;
} catch (const args::Help&) {
  std::cout << param::parser << std::endl;
  return EXIT_SUCCESS;
} catch (const std::exception& e) {
  std::cerr << e.what() << std::endl;
  return EXIT_FAILURE;
}