/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2014-2020,  The University of Memphis,
 *                           Regents of the University of California,
 *                           Arizona Board of Regents.
 *
 * This file is part of NLSR (Named-data Link State Routing).
 * See AUTHORS.md for complete list of NLSR authors and contributors.
 *
 * NLSR is free software: you can redistribute it and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * NLSR 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 **/

#ifndef NLSR_CERTIFICATE_STORE_HPP
#define NLSR_CERTIFICATE_STORE_HPP

#include "common.hpp"
#include "test-access-control.hpp"
#include "lsdb.hpp"

#include <ndn-cxx/interest.hpp>
#include <ndn-cxx/mgmt/nfd/controller.hpp>
#include <ndn-cxx/security/v2/certificate.hpp>
#include <ndn-cxx/security/validator-config.hpp>

namespace nlsr {
class ConfParameter;
namespace security {

/*! \brief Store certificates for names
 *
 * Stores certificates that this router claims to be authoritative
 * for. That is, this stores only the certificates that we will reply
 * to KEY interests with, e.g. when other routers are verifying data
 * we have sent.
 */
class CertificateStore
{

public:
  CertificateStore(ndn::Face& face, ConfParameter& confParam, Lsdb& lsdb);

  void
  insert(const ndn::security::v2::Certificate& certificate);

  /*! \brief Find a certificate
   *
   * Find a certificate that NLSR has. First it checks against the
   * certificates this NLSR claims to be authoritative for, usually
   * something like this specific router's certificate, and then
   * checks the cache of certificates it has already fetched. If none
   * can be found, it will return an null pointer.
 */
  const ndn::security::v2::Certificate*
  find(const ndn::Name& keyName) const;

  /*! \brief Retrieves the chain of certificates from Validator's cache and
   *   store them in Nlsr's own CertificateStore.
   * \param keyName Name of the first key in the certificate chain.
  */
  void
  publishCertFromCache(const ndn::Name& keyName);

  void
  afterFetcherSignalEmitted(const ndn::Data& lsaSegment);

PUBLIC_WITH_TESTS_ELSE_PRIVATE:
  void
  clear();

  void
  setInterestFilter(const ndn::Name& prefix, const bool loopback = false);

  void
  registerKeyPrefixes();

  void
  onKeyInterest(const ndn::Name& name, const ndn::Interest& interest);

  void
  onKeyPrefixRegSuccess(const ndn::Name& name);

  void
  registrationFailed(const ndn::Name& name);

private:
  typedef std::map<ndn::Name, ndn::security::v2::Certificate> CertMap;
  CertMap m_certificates;
  ndn::Face& m_face;
  ConfParameter& m_confParam;
  Lsdb& m_lsdb;
  ndn::security::ValidatorConfig& m_validator;
  ndn::util::signal::ScopedConnection m_afterSegmentValidatedConnection;
};

} // namespace security
} // namespace nlsr

#endif // NLSR_CERTIFICATE_STORE_HPP