/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2017 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */

#include "ndnsec.hpp"
#include "util.hpp"

namespace ndn {
namespace ndnsec {

int
ndnsec_import(int argc, char** argv)
{
  using namespace ndn;
  namespace po = boost::program_options;

  std::string input("-");
  std::string importPassword;
  bool isPrivateImport = false;

  po::options_description description("General Usage\n  ndnsec import [-h] [-p] input \nGeneral options");
  description.add_options()
    ("help,h", "produce help message")
    ("private,p", "import info contains private key")
    ("input,i", po::value<std::string>(&input), "input source, stdin if -")
    ;

  po::positional_options_description p;
  p.add("input", 1);

  po::variables_map vm;
  try {
    po::store(po::command_line_parser(argc, argv).options(description).positional(p).run(), vm);
    po::notify(vm);
  }
  catch (const std::exception& e) {
    std::cerr << "ERROR: " << e.what() << std::endl;
    std::cerr << description << std::endl;
    return 1;
  }

  if (vm.count("help") != 0) {
    std::cerr << description << std::endl;
    return 0;
  }

  if (vm.count("private") != 0)
    isPrivateImport = true;

  if (!isPrivateImport) {
    std::cerr << "You are trying to import certificate!\n"
              << "Please use ndnsec cert-install!" << std::endl;
    return 1;
  }
  else {
    try {
      security::v1::KeyChain keyChain;

      shared_ptr<security::v1::SecuredBag> securedBag;
      if (input == "-")
        securedBag = io::load<security::v1::SecuredBag>(std::cin);
      else
        securedBag = io::load<security::v1::SecuredBag>(input);

      int count = 3;
      while (!getPassword(importPassword, "Passphrase for the private key: ")) {
        count--;
        if (count <= 0) {
          std::cerr << "ERROR: Fail to get password" << std::endl;
          memset(const_cast<char*>(importPassword.c_str()), 0, importPassword.size());
          return 1;
        }
      }
      keyChain.importIdentity(*securedBag, importPassword);
      memset(const_cast<char*>(importPassword.c_str()), 0, importPassword.size());
    }
    catch (const std::runtime_error& e) {
      std::cerr << "ERROR: " << e.what() << std::endl;
      memset(const_cast<char*>(importPassword.c_str()), 0, importPassword.size());
      return 1;
    }

    return 0;
  }
}

} // namespace ndnsec
} // namespace ndn