/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2014-2016,  Regents of the University of California,
 *                           Arizona Board of Regents,
 *                           Colorado State University,
 *                           University Pierre & Marie Curie, Sorbonne University,
 *                           Washington University in St. Louis,
 *                           Beijing Institute of Technology,
 *                           The University of Memphis.
 *
 * This file is part of NFD (Named Data Networking Forwarding Daemon).
 * See AUTHORS.md for complete list of NFD authors and contributors.
 *
 * NFD 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.
 *
 * NFD 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
 * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "legacy-nfdc.hpp"
#include "face-id-fetcher.hpp"

#include <boost/regex.hpp>

namespace nfd {
namespace tools {
namespace nfdc {

using ndn::nfd::ControlParameters;

const time::milliseconds LegacyNfdc::DEFAULT_EXPIRATION_PERIOD = time::milliseconds::max();
const uint64_t LegacyNfdc::DEFAULT_COST = 0;

LegacyNfdc::LegacyNfdc(ndn::Face& face)
  : m_flags(ndn::nfd::ROUTE_FLAG_CHILD_INHERIT)
  , m_cost(DEFAULT_COST)
  , m_origin(ndn::nfd::ROUTE_ORIGIN_STATIC)
  , m_expires(DEFAULT_EXPIRATION_PERIOD)
  , m_facePersistency(ndn::nfd::FACE_PERSISTENCY_PERSISTENT)
  , m_face(face)
  , m_controller(face, m_keyChain)
{
}

bool
LegacyNfdc::dispatch(const std::string& command)
{
  if (command == "add-nexthop") {
    if (m_nOptions != 2)
      return false;
    fibAddNextHop();
  }
  else if (command == "remove-nexthop") {
    if (m_nOptions != 2)
      return false;
    fibRemoveNextHop();
  }
  else if (command == "register") {
    if (m_nOptions != 2)
      return false;
    ribRegisterPrefix();
  }
  else if (command == "unregister") {
    if (m_nOptions != 2)
      return false;
    ribUnregisterPrefix();
  }
  else if (command == "create") {
    if (m_nOptions != 1)
      return false;
    faceCreate();
  }
  else if (command == "destroy") {
    if (m_nOptions != 1)
      return false;
    faceDestroy();
  }
  else if (command == "set-strategy") {
    if (m_nOptions != 2)
      return false;
    strategyChoiceSet();
  }
  else if (command == "unset-strategy") {
    if (m_nOptions != 1)
      return false;
    strategyChoiceUnset();
  }
  else
    return false;

  return true;
}

void
LegacyNfdc::fibAddNextHop()
{
  m_name = m_commandLineArguments[0];
  const std::string& faceName = m_commandLineArguments[1];

  FaceIdFetcher::start(m_face, m_controller, faceName, true,
    [this] (const uint32_t faceId) {
      ControlParameters parameters;
      parameters
        .setName(m_name)
        .setCost(m_cost)
        .setFaceId(faceId);

      m_controller.start<ndn::nfd::FibAddNextHopCommand>(parameters,
        bind(&LegacyNfdc::onSuccess, this, _1, "Nexthop insertion succeeded"),
        bind(&LegacyNfdc::onError, this, _1, _2, "Nexthop insertion failed"));
    },
    bind(&LegacyNfdc::onObtainFaceIdFailure, this, _1));
}

void
LegacyNfdc::fibRemoveNextHop()
{
  m_name = m_commandLineArguments[0];
  const std::string& faceName = m_commandLineArguments[1];

  FaceIdFetcher::start(m_face, m_controller, faceName, false,
    [this] (const uint32_t faceId) {
      ControlParameters parameters;
      parameters
        .setName(m_name)
        .setFaceId(faceId);

      m_controller.start<ndn::nfd::FibRemoveNextHopCommand>(parameters,
        bind(&LegacyNfdc::onSuccess, this, _1, "Nexthop removal succeeded"),
        bind(&LegacyNfdc::onError, this, _1, _2, "Nexthop removal failed"));
    },
    bind(&LegacyNfdc::onObtainFaceIdFailure, this, _1));
}

void
LegacyNfdc::ribRegisterPrefix()
{
  m_name = m_commandLineArguments[0];
  const std::string& faceName = m_commandLineArguments[1];

  FaceIdFetcher::start(m_face, m_controller, faceName, true,
    [this] (const uint32_t faceId) {
      ControlParameters parameters;
      parameters
        .setName(m_name)
        .setCost(m_cost)
        .setFlags(m_flags)
        .setOrigin(m_origin)
        .setFaceId(faceId);

      if (m_expires != DEFAULT_EXPIRATION_PERIOD)
        parameters.setExpirationPeriod(m_expires);

      m_controller.start<ndn::nfd::RibRegisterCommand>(parameters,
        bind(&LegacyNfdc::onSuccess, this, _1, "Successful in name registration"),
        bind(&LegacyNfdc::onError, this, _1, _2, "Failed in name registration"));
    },
    bind(&LegacyNfdc::onObtainFaceIdFailure, this, _1));
}

void
LegacyNfdc::ribUnregisterPrefix()
{
  m_name = m_commandLineArguments[0];
  const std::string& faceName = m_commandLineArguments[1];

  FaceIdFetcher::start(m_face, m_controller, faceName, false,
    [this] (const uint32_t faceId) {
      ControlParameters parameters;
      parameters
        .setName(m_name)
        .setFaceId(faceId)
        .setOrigin(m_origin);

      m_controller.start<ndn::nfd::RibUnregisterCommand>(parameters,
        bind(&LegacyNfdc::onSuccess, this, _1, "Successful in unregistering name"),
        bind(&LegacyNfdc::onError, this, _1, _2, "Failed in unregistering name"));
    },
    bind(&LegacyNfdc::onObtainFaceIdFailure, this, _1));
}

void
LegacyNfdc::onCanonizeFailure(const std::string& reason)
{
  BOOST_THROW_EXCEPTION(Error(reason));
}

void
LegacyNfdc::onObtainFaceIdFailure(const std::string& message)
{
  BOOST_THROW_EXCEPTION(Error(message));
}

void
LegacyNfdc::faceCreate()
{
  boost::regex e("^[a-z0-9]+\\:.*");
  if (!boost::regex_match(m_commandLineArguments[0], e))
    BOOST_THROW_EXCEPTION(Error("invalid uri format"));

  FaceUri faceUri;
  faceUri.parse(m_commandLineArguments[0]);

  faceUri.canonize(bind(&LegacyNfdc::startFaceCreate, this, _1),
                   bind(&LegacyNfdc::onCanonizeFailure, this, _1),
                   m_face.getIoService(), time::seconds(4));
}

void
LegacyNfdc::startFaceCreate(const FaceUri& canonicalUri)
{
  ControlParameters parameters;
  parameters.setUri(canonicalUri.toString());
  parameters.setFacePersistency(m_facePersistency);

  m_controller.start<ndn::nfd::FaceCreateCommand>(parameters,
    bind(&LegacyNfdc::onSuccess, this, _1, "Face creation succeeded"),
    bind(&LegacyNfdc::onError, this, _1, _2, "Face creation failed"));
}

void
LegacyNfdc::faceDestroy()
{
  ControlParameters parameters;
  const std::string& faceName = m_commandLineArguments[0];

  FaceIdFetcher::start(m_face, m_controller, faceName, false,
    [this] (const uint32_t faceId) {
      ControlParameters faceParameters;
      faceParameters.setFaceId(faceId);

      m_controller.start<ndn::nfd::FaceDestroyCommand>(faceParameters,
        bind(&LegacyNfdc::onSuccess, this, _1, "Face destroy succeeded"),
        bind(&LegacyNfdc::onError, this, _1, _2, "Face destroy failed"));
    },
    bind(&LegacyNfdc::onObtainFaceIdFailure, this, _1));
}

void
LegacyNfdc::strategyChoiceSet()
{
  const std::string& name = m_commandLineArguments[0];
  const std::string& strategy = m_commandLineArguments[1];

  ControlParameters parameters;
  parameters
    .setName(name)
    .setStrategy(strategy);

  m_controller.start<ndn::nfd::StrategyChoiceSetCommand>(parameters,
    bind(&LegacyNfdc::onSuccess, this, _1, "Successfully set strategy choice"),
    bind(&LegacyNfdc::onError, this, _1, _2, "Failed to set strategy choice"));
}

void
LegacyNfdc::strategyChoiceUnset()
{
  const std::string& name = m_commandLineArguments[0];

  ControlParameters parameters;
  parameters.setName(name);

  m_controller.start<ndn::nfd::StrategyChoiceUnsetCommand>(parameters,
    bind(&LegacyNfdc::onSuccess, this, _1, "Successfully unset strategy choice"),
    bind(&LegacyNfdc::onError, this, _1, _2, "Failed to unset strategy choice"));
}

void
LegacyNfdc::onSuccess(const ControlParameters& commandSuccessResult, const std::string& message)
{
  std::cout << message << ": " << commandSuccessResult << std::endl;
}

void
LegacyNfdc::onError(uint32_t code, const std::string& error, const std::string& message)
{
  std::ostringstream os;
  os << message << ": " << error << " (code: " << code << ")";
  BOOST_THROW_EXCEPTION(Error(os.str()));
}

} // namespace nfdc
} // namespace tools
} // namespace nfd