/* -*- 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/>.
 */

#include "ethernet-fixture.hpp"

#include "common/global.hpp"

#include "tests/daemon/face/transport-test-common.hpp"

namespace nfd::tests {

using namespace nfd::face;

BOOST_AUTO_TEST_SUITE(Face)
BOOST_FIXTURE_TEST_SUITE(TestUnicastEthernetTransport, EthernetFixture)

BOOST_AUTO_TEST_CASE(StaticProperties)
{
  SKIP_IF_ETHERNET_NETIF_COUNT_LT(1);
  initializeUnicast();

  checkStaticPropertiesInitialized(*transport);

  BOOST_CHECK_EQUAL(transport->getLocalUri(), FaceUri("dev://" + localEp));
  BOOST_CHECK_EQUAL(transport->getRemoteUri(), FaceUri("ether://[" + remoteEp.toString() + "]"));
  BOOST_CHECK_EQUAL(transport->getScope(), ndn::nfd::FACE_SCOPE_NON_LOCAL);
  BOOST_CHECK_EQUAL(transport->getPersistency(), ndn::nfd::FACE_PERSISTENCY_PERSISTENT);
  BOOST_CHECK_EQUAL(transport->getLinkType(), ndn::nfd::LINK_TYPE_POINT_TO_POINT);
}

BOOST_AUTO_TEST_CASE(PersistencyChange)
{
  SKIP_IF_ETHERNET_NETIF_COUNT_LT(1);
  initializeUnicast();

  BOOST_CHECK_EQUAL(transport->canChangePersistencyTo(ndn::nfd::FACE_PERSISTENCY_ON_DEMAND), true);
  BOOST_CHECK_EQUAL(transport->canChangePersistencyTo(ndn::nfd::FACE_PERSISTENCY_PERSISTENT), true);
  BOOST_CHECK_EQUAL(transport->canChangePersistencyTo(ndn::nfd::FACE_PERSISTENCY_PERMANENT), true);
}

BOOST_AUTO_TEST_CASE(NetifStateChange)
{
  SKIP_IF_NO_RUNNING_ETHERNET_NETIF();
  auto netif = getRunningNetif();
  initializeUnicast(netif);

  // Simulate setting interface administratively down
  getScheduler().schedule(10_ms, [netif] { netif->setState(ndn::net::InterfaceState::DOWN); });
  transport->afterStateChange.connectSingleShot([this] (auto oldState, auto newState) {
    BOOST_CHECK_EQUAL(oldState, TransportState::UP);
    BOOST_CHECK_EQUAL(newState, TransportState::DOWN);
    this->limitedIo.afterOp();
  });
  BOOST_CHECK_EQUAL(limitedIo.run(1, 1_s), LimitedIo::EXCEED_OPS);
  BOOST_CHECK_EQUAL(transport->getState(), TransportState::DOWN);

  // Simulate setting interface administratively up
  getScheduler().schedule(10_ms, [netif] { netif->setState(ndn::net::InterfaceState::NO_CARRIER); });
  getScheduler().schedule(80_ms, [netif] { netif->setState(ndn::net::InterfaceState::RUNNING); });
  transport->afterStateChange.connectSingleShot([this] (auto oldState, auto newState) {
    BOOST_CHECK_EQUAL(oldState, TransportState::DOWN);
    BOOST_CHECK_EQUAL(newState, TransportState::UP);
    this->limitedIo.afterOp();
  });
  BOOST_CHECK_EQUAL(limitedIo.run(1, 1_s), LimitedIo::EXCEED_OPS);
  BOOST_CHECK_EQUAL(transport->getState(), TransportState::UP);
}

BOOST_AUTO_TEST_CASE(NetifMtuChange)
{
  SKIP_IF_ETHERNET_NETIF_COUNT_LT(1);
  initializeUnicast();
  BOOST_CHECK_EQUAL(transport->getMtu(), defaultNetif->getMtu());

  // netif changes MTU from initial value to 1024
  defaultNetif->setMtu(1024);
  BOOST_CHECK_EQUAL(transport->getMtu(), 1024);

  // netif changes MTU from 1024 to 4000
  defaultNetif->setMtu(4000);
  BOOST_CHECK_EQUAL(transport->getMtu(), 4000);

  // netif changes MTU from 4000 to 0
  defaultNetif->setMtu(0);
  BOOST_CHECK_EQUAL(transport->getMtu(), 0);
}

BOOST_AUTO_TEST_CASE(ExpirationTime)
{
  SKIP_IF_ETHERNET_NETIF_COUNT_LT(1);
  initializeUnicast(nullptr, ndn::nfd::FACE_PERSISTENCY_ON_DEMAND);
  BOOST_CHECK_NE(transport->getExpirationTime(), time::steady_clock::TimePoint::max());

  transport->setPersistency(ndn::nfd::FACE_PERSISTENCY_PERSISTENT);
  BOOST_CHECK_EQUAL(transport->getExpirationTime(), time::steady_clock::TimePoint::max());

  transport->setPersistency(ndn::nfd::FACE_PERSISTENCY_ON_DEMAND);
  BOOST_CHECK_NE(transport->getExpirationTime(), time::steady_clock::TimePoint::max());
}

BOOST_AUTO_TEST_CASE(Close)
{
  SKIP_IF_NO_RUNNING_ETHERNET_NETIF();
  initializeUnicast(getRunningNetif());

  transport->afterStateChange.connectSingleShot([] (auto oldState, auto newState) {
    BOOST_CHECK_EQUAL(oldState, TransportState::UP);
    BOOST_CHECK_EQUAL(newState, TransportState::CLOSING);
  });

  transport->close();

  transport->afterStateChange.connectSingleShot([this] (auto oldState, auto newState) {
    BOOST_CHECK_EQUAL(oldState, TransportState::CLOSING);
    BOOST_CHECK_EQUAL(newState, TransportState::CLOSED);
    this->limitedIo.afterOp();
  });

  BOOST_REQUIRE_EQUAL(limitedIo.run(1, 1_s), LimitedIo::EXCEED_OPS);
}

BOOST_AUTO_TEST_CASE(IdleClose)
{
  SKIP_IF_NO_RUNNING_ETHERNET_NETIF();
  initializeUnicast(getRunningNetif(), ndn::nfd::FACE_PERSISTENCY_ON_DEMAND);

  int nStateChanges = 0;
  transport->afterStateChange.connect(
    [this, &nStateChanges] (auto oldState, auto newState) {
      switch (nStateChanges) {
      case 0:
        BOOST_CHECK_EQUAL(oldState, TransportState::UP);
        BOOST_CHECK_EQUAL(newState, TransportState::CLOSING);
        break;
      case 1:
        BOOST_CHECK_EQUAL(oldState, TransportState::CLOSING);
        BOOST_CHECK_EQUAL(newState, TransportState::CLOSED);
        break;
      default:
        BOOST_CHECK(false);
      }
      nStateChanges++;
      this->limitedIo.afterOp();
    });

  BOOST_REQUIRE_EQUAL(limitedIo.run(2, 5_s), LimitedIo::EXCEED_OPS);
  BOOST_CHECK_EQUAL(nStateChanges, 2);
}

BOOST_AUTO_TEST_CASE(SendQueueLength)
{
  SKIP_IF_ETHERNET_NETIF_COUNT_LT(1);
  initializeUnicast();

  BOOST_CHECK_EQUAL(transport->getSendQueueLength(), QUEUE_UNSUPPORTED);
}

BOOST_AUTO_TEST_SUITE_END() // TestUnicastEthernetTransport
BOOST_AUTO_TEST_SUITE_END() // Face

} // namespace nfd::tests