/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2014  University of Memphis,
 *                     Regents of the University of California
 *
 * 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/>.
 *
 * \author A K M Mahmudul Hoque <ahoque1@memphis.edu>
 *
 **/
#ifndef NLSR_HELLO_PROTOCOL_HPP
#define NLSR_HELLO_PROTOCOL_HPP

#include <boost/cstdint.hpp>
#include <ndn-cxx/face.hpp>
#include <ndn-cxx/util/scheduler.hpp>

namespace nlsr {

class Nlsr;

class HelloProtocol
{
public:
  HelloProtocol(Nlsr& nlsr, ndn::Scheduler& scheduler)
    : m_nlsr(nlsr)
    , m_scheduler(scheduler)
    , m_adjLsaBuildInterval(static_cast<uint32_t>(ADJ_LSA_BUILD_INTERVAL_DEFAULT))
  {
  }

  void
  scheduleInterest(uint32_t seconds);

  void
  expressInterest(const ndn::Name& interestNamePrefix, uint32_t seconds);

  void
  sendScheduledInterest(uint32_t seconds);

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

  void
  setAdjLsaBuildInterval(uint32_t interval)
  {
    m_adjLsaBuildInterval = ndn::time::seconds(interval);
  }

  const ndn::time::seconds&
  getAdjLsaBuildInterval() const
  {
    return m_adjLsaBuildInterval;
  }

private:
  void
  processInterestTimedOut(const ndn::Interest& interest);

  void
  onContent(const ndn::Interest& interest, const ndn::Data& data);

  void
  onContentValidated(const ndn::shared_ptr<const ndn::Data>& data);

  void
  onContentValidationFailed(const ndn::shared_ptr<const ndn::Data>& data,
                            const std::string& msg);

  void
  onRegistrationFailure(uint32_t code, const std::string& error,
                        const ndn::Name& name);

  void
  onRegistrationSuccess(const ndn::nfd::ControlParameters& commandSuccessResult,
                        const ndn::Name& neighbor, const ndn::time::milliseconds& timeout);

  void
  registerPrefixes(const ndn::Name& adjName, const std::string& faceUri,
                   double linkCost, const ndn::time::milliseconds& timeout);
private:
  Nlsr& m_nlsr;
  ndn::Scheduler& m_scheduler;

  static const std::string INFO_COMPONENT;
  static const std::string NLSR_COMPONENT;

  ndn::time::seconds m_adjLsaBuildInterval;
};

} //namespace nlsr

#endif // NLSR_HELLO_PROTOCOL_HPP