/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2014-2021,  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/>.
 */

/** \file
 *  This test suite tests instantiation logic in strategies.
 */

// All strategies, sorted alphabetically.
#include "fw/access-strategy.hpp"
#include "fw/asf-strategy.hpp"
#include "fw/best-route-strategy.hpp"
#include "fw/multicast-strategy.hpp"
#include "fw/self-learning-strategy.hpp"
#include "fw/random-strategy.hpp"

#include "tests/test-common.hpp"

#include <boost/mpl/vector.hpp>

namespace nfd {
namespace fw {
namespace tests {

BOOST_AUTO_TEST_SUITE(Fw)
BOOST_AUTO_TEST_SUITE(TestStrategyInstantiation)

template<typename S, bool CanAcceptParameters, uint64_t MinVersion>
class Test
{
public:
  using Strategy = S;

  static bool
  canAcceptParameters()
  {
    return CanAcceptParameters;
  }

  static uint64_t
  getMinVersion()
  {
    return MinVersion;
  }

  static Name
  getVersionedStrategyName(uint64_t version)
  {
    return S::getStrategyName().getPrefix(-1).appendVersion(version);
  }
};

using Tests = boost::mpl::vector<
  Test<AccessStrategy, false, 1>,
  Test<AsfStrategy, true, 4>,
  Test<BestRouteStrategy, false, 5>,
  Test<MulticastStrategy, false, 4>,
  Test<SelfLearningStrategy, false, 1>,
  Test<RandomStrategy, false, 1>
>;

BOOST_AUTO_TEST_CASE_TEMPLATE(Registration, T, Tests)
{
  BOOST_CHECK_EQUAL(Strategy::listRegistered().count(T::Strategy::getStrategyName()), 1);
}

BOOST_AUTO_TEST_CASE_TEMPLATE(InstanceName, T, Tests)
{
  BOOST_REQUIRE(T::Strategy::getStrategyName().at(-1).isVersion());
  uint64_t maxVersion = T::Strategy::getStrategyName().at(-1).toVersion();
  BOOST_REQUIRE_LE(T::getMinVersion(), maxVersion);

  FaceTable faceTable;
  Forwarder forwarder(faceTable);
  for (uint64_t version = T::getMinVersion(); version <= maxVersion; ++version) {
    Name versionedName = T::getVersionedStrategyName(version);
    unique_ptr<typename T::Strategy> instance;
    BOOST_CHECK_NO_THROW(instance = make_unique<typename T::Strategy>(forwarder, versionedName));
    BOOST_CHECK_EQUAL(instance->getInstanceName(), versionedName);

    if (!T::canAcceptParameters()) {
      Name nameWithParameters = Name(versionedName).append("param");
      BOOST_CHECK_THROW(typename T::Strategy(forwarder, nameWithParameters), std::invalid_argument);
    }
  }

  if (T::getMinVersion() > 0) {
    Name version0Name = T::getVersionedStrategyName(0);
    BOOST_CHECK_THROW(typename T::Strategy(forwarder, version0Name), std::invalid_argument);
    Name earlyVersionName = T::getVersionedStrategyName(T::getMinVersion() - 1);
    BOOST_CHECK_THROW(typename T::Strategy(forwarder, earlyVersionName), std::invalid_argument);
  }

  if (maxVersion < std::numeric_limits<uint64_t>::max()) {
    Name versionMaxName = T::getVersionedStrategyName(std::numeric_limits<uint64_t>::max());
    BOOST_CHECK_THROW(typename T::Strategy(forwarder, versionMaxName), std::invalid_argument);
    Name lateVersionName = T::getVersionedStrategyName(maxVersion + 1);
    BOOST_CHECK_THROW(typename T::Strategy(forwarder, lateVersionName), std::invalid_argument);
  }
}

BOOST_AUTO_TEST_SUITE_END() // TestStrategyInstantiation
BOOST_AUTO_TEST_SUITE_END() // Fw

} // namespace tests
} // namespace fw
} // namespace nfd