/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2014-2022,  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/>.
 */

#ifndef NFD_TESTS_DAEMON_FACE_FACE_SYSTEM_FIXTURE_HPP
#define NFD_TESTS_DAEMON_FACE_FACE_SYSTEM_FIXTURE_HPP

#include "face/face.hpp"
#include "face/face-system.hpp"
#include "face/protocol-factory.hpp"
#include "fw/face-table.hpp"

#include "tests/test-common.hpp"
#include "tests/daemon/global-io-fixture.hpp"
#include "test-netif.hpp"

#include <ndn-cxx/net/network-monitor-stub.hpp>

namespace nfd::tests {

class FaceSystemFixture : public virtual GlobalIoFixture
{
public:
  FaceSystemFixture()
    : netmon(make_shared<ndn::net::NetworkMonitorStub>(~0))
    , faceSystem(faceTable, netmon)
    , netdevBound(*faceSystem.m_netdevBound)
  {
    faceSystem.setConfigFile(configFile);
  }

  /** \brief Copy a snapshot of NetworkInterface information to \p netmon.
   *  \pre netmon contains no NetworkInterface
   */
  void
  copyRealNetifsToNetmon()
  {
    BOOST_ASSERT(netmon->listNetworkInterfaces().empty());
    for (const auto& netif : collectNetworkInterfaces()) {
      auto copy = netmon->makeNetworkInterface();
      copy->setIndex(netif->getIndex());
      copy->setName(netif->getName());
      copy->setType(netif->getType());
      copy->setFlags(netif->getFlags());
      copy->setState(netif->getState());
      copy->setMtu(netif->getMtu());
      copy->setEthernetAddress(netif->getEthernetAddress());
      copy->setEthernetBroadcastAddress(netif->getEthernetBroadcastAddress());
      for (const auto& na : netif->getNetworkAddresses()) {
        copy->addNetworkAddress(na);
      }
      netmon->addInterface(copy);
    }
    netmon->emitEnumerationCompleted();
  }

  void
  parseConfig(const std::string& text, bool isDryRun)
  {
    configFile.parse(text, isDryRun, "test-config");
  }

  /** \brief Get ProtocolFactory from FaceSystem.
   *  \tparam F ProtocolFactory subclass
   *
   *  If ProtocolFactory with \p scheme does not exist or has an incompatible type,
   *  this fails the test case.
   */
  template<typename F>
  F&
  getFactoryById(const std::string& id)
  {
    F* factory = dynamic_cast<F*>(faceSystem.getFactoryById(id));
    BOOST_REQUIRE(factory != nullptr);
    return *factory;
  }

  /** \brief Get ProtocolFactory from FaceSystem.
   *  \tparam F ProtocolFactory subclass
   *
   *  If ProtocolFactory with \p scheme does not exist or has an incompatible type,
   *  this fails the test case.
   */
  template<typename F>
  F&
  getFactoryByScheme(const std::string& scheme)
  {
    F* factory = dynamic_cast<F*>(faceSystem.getFactoryByScheme(scheme));
    BOOST_REQUIRE(factory != nullptr);
    return *factory;
  }

  /** \brief List faces of specified scheme from FaceTable.
   *  \param scheme local or remote FaceUri scheme
   *  \param linkType if not NONE, filter by specified LinkType
   */
  std::vector<const Face*>
  listFacesByScheme(const std::string& scheme,
                    ndn::nfd::LinkType linkType = ndn::nfd::LINK_TYPE_NONE) const
  {
    std::vector<const Face*> faces;
    for (const Face& face : faceTable) {
      if ((face.getLocalUri().getScheme() == scheme ||
           face.getRemoteUri().getScheme() == scheme) &&
          (linkType == ndn::nfd::LINK_TYPE_NONE ||
           face.getLinkType() == linkType)) {
        faces.push_back(&face);
      }
    }
    return faces;
  }

protected:
  ConfigFile configFile;
  FaceTable faceTable;
  shared_ptr<ndn::net::NetworkMonitorStub> netmon;
  FaceSystem faceSystem;
  face::NetdevBound& netdevBound;
};

/**
 * \brief FaceSystemFixture with a ProtocolFactory reference.
 */
template<typename FactoryType>
class FaceSystemFactoryFixture : public FaceSystemFixture
{
protected:
  FaceSystemFactoryFixture()
    : factory(getFactoryById<FactoryType>(FactoryType::getId()))
  {
  }

protected:
  FactoryType& factory;
};

/**
 * \brief A dummy ProtocolFactory for testing FaceSystem configuration parsing.
 */
class DummyProtocolFactory : public face::ProtocolFactory
{
public:
  using ProtocolFactory::ProtocolFactory;

  void
  doProcessConfig(OptionalConfigSection configSection,
                  FaceSystem::ConfigContext& context) final
  {
    processConfigHistory.push_back({configSection, context.isDryRun,
                                    context.generalConfig.wantCongestionMarking});
    if (!context.isDryRun) {
      providedSchemes = newProvidedSchemes;
    }
  }

public:
  struct ProcessConfigArgs
  {
    OptionalConfigSection configSection;
    bool isDryRun;
    bool wantCongestionMarking;
  };
  std::vector<ProcessConfigArgs> processConfigHistory;

  std::set<std::string> newProvidedSchemes;
};

} // namespace nfd::tests

#endif // NFD_TESTS_DAEMON_FACE_FACE_SYSTEM_FIXTURE_HPP