/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2017, Regents of the University of California.
 *
 * This file is part of ChronoShare, a decentralized file sharing application over NDN.
 *
 * ChronoShare 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.
 *
 * ChronoShare 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 copies of the GNU General Public License along with
 * ChronoShare, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ChronoShare authors and contributors.
 */

#include "ccnx-wrapper.hpp"
#include "fetch-manager.hpp"
#include "fetcher.hpp"
#include "logging.hpp"
#include <boost/make_shared.hpp>
#include <boost/test/unit_test.hpp>

_LOG_INIT(Test.FetchManager);

using namespace Ndnx;
using namespace std;
using namespace boost;

BOOST_AUTO_TEST_SUITE(TestFetchManager)

struct FetcherTestData
{
  set<uint64_t> recvData;
  set<uint64_t> recvContent;

  set<Name> differentNames;
  set<Name> segmentNames;

  bool m_done;
  bool m_failed;

  FetcherTestData()
    : m_done(false)
    , m_failed(false)
  {
  }

  void
  onData(const Ccnx::Name& deviceName, const Ccnx::Name& basename, uint64_t seqno, Ccnx::PcoPtr pco)
  {
    _LOG_TRACE("onData: " << seqno);

    recvData.insert(seqno);
    differentNames.insert(basename);
    Name name = basename;
    name.appendComp(seqno);
    segmentNames.insert(name);

    BytesPtr data = pco->contentPtr();

    if (data->size() == sizeof(int)) {
      recvContent.insert(*reinterpret_cast<const int*>(head(*data)));
    }

    // cout << "<<< " << basename << ", " << name << ", " << seqno << endl;
  }

  void
  finish(const Ccnx::Name& deviceName, const Ccnx::Name& baseName)
  {
  }

  void
  onComplete(Fetcher& fetcher)
  {
    m_done = true;
    // cout << "Done" << endl;
  }

  void
  onFail(Fetcher& fetcher)
  {
    m_failed = true;
    // cout << "Failed" << endl;
  }
};

void run()
{
  NdnxWrapperPtr ndnx = make_shared<NdnxWrapper> ();

  Name baseName ("/base");
  Name deviceName ("/device");

  for (int i = 0; i < 10; i++)
    {
      usleep(100000);
      ndnx->publishData (Name (baseName)(i), reinterpret_cast<const unsigned char*> (&i), sizeof(int), 30);
    }

  for (int i = 11; i < 50; i++)
    {
      usleep(100000);
      ndnx->publishData (Name (baseName)(i), reinterpret_cast<const unsigned char*> (&i), sizeof(int), 30);
    }

}

BOOST_AUTO_TEST_CASE(TestFetcher)
{
  CcnxWrapperPtr ccnx = make_shared<CcnxWrapper>();

  Name baseName("/base");
  Name deviceName("/device");
  /* publish seqnos:  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, <gap 5>, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, <gap 1>, 26 */
  // this will allow us to test our pipeline of 6
  for (int i = 0; i < 10; i++) {
    ccnx->publishData(Name(baseName)(i), reinterpret_cast<const unsigned char*>(&i), sizeof(int), 30);
  }

  for (int i = 15; i < 25; i++) {
    ccnx->publishData(Name(baseName)(i), reinterpret_cast<const unsigned char*>(&i), sizeof(int), 30);
  }

  int oneMore = 26;
  ccnx->publishData(Name(baseName)(oneMore), reinterpret_cast<const unsigned char*>(&oneMore),
                    sizeof(int), 30);

  FetcherTestData data;
  ExecutorPtr executor = make_shared<Executor>(1);
  executor->start();

  Fetcher fetcher(ccnx, executor, bind(&FetcherTestData::onData, &data, _1, _2, _3, _4),
                  bind(&FetcherTestData::finish, &data, _1, _2),
                  bind(&FetcherTestData::onComplete, &data, _1),
                  bind(&FetcherTestData::onFail, &data, _1), deviceName, Name("/base"), 0, 26,
                  boost::posix_time::seconds(5)); // this time is not precise

  BOOST_CHECK_EQUAL(fetcher.IsActive(), false);
  fetcher.RestartPipeline();
  BOOST_CHECK_EQUAL(fetcher.IsActive(), true);

  usleep(7000000);
  BOOST_CHECK_EQUAL(data.m_failed, true);
  BOOST_CHECK_EQUAL(data.differentNames.size(), 1);
  BOOST_CHECK_EQUAL(data.segmentNames.size(), 20);
  BOOST_CHECK_EQUAL(data.recvData.size(), 20);
  BOOST_CHECK_EQUAL(data.recvContent.size(), 20);

  {
    ostringstream recvData;
    for (set<uint64_t>::iterator i = data.recvData.begin(); i != data.recvData.end(); i++)
      recvData << *i << ", ";

    ostringstream recvContent;
    for (set<uint64_t>::iterator i = data.recvContent.begin(); i != data.recvContent.end(); i++)
      recvContent << *i << ", ";

    BOOST_CHECK_EQUAL(recvData.str(),
                      "0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, ");
    BOOST_CHECK_EQUAL(recvData.str(), recvContent.str());
  }

  BOOST_CHECK_EQUAL(fetcher.IsActive(), false);
  fetcher.RestartPipeline();
  BOOST_CHECK_EQUAL(fetcher.IsActive(), true);

  usleep(7000000);
  BOOST_CHECK_EQUAL(data.m_failed, true);

  // publishing missing pieces
  for (int i = 0; i < 27; i++) {
    ccnx->publishData(Name(baseName)(i), reinterpret_cast<const unsigned char*>(&i), sizeof(int), 1);
  }
  BOOST_CHECK_EQUAL(fetcher.IsActive(), false);
  fetcher.RestartPipeline();
  BOOST_CHECK_EQUAL(fetcher.IsActive(), true);

  usleep(1000000);
  BOOST_CHECK_EQUAL(data.m_done, true);

  {
    ostringstream recvData;
    for (set<uint64_t>::iterator i = data.recvData.begin(); i != data.recvData.end(); i++)
      recvData << *i << ", ";

    ostringstream recvContent;
    for (set<uint64_t>::iterator i = data.recvContent.begin(); i != data.recvContent.end(); i++)
      recvContent << *i << ", ";

    BOOST_CHECK_EQUAL(recvData.str(),
                      "0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, ");
    BOOST_CHECK_EQUAL(recvData.str(), recvContent.str());
  }

  executor->shutdown();
}


BOOST_AUTO_TEST_CASE (TestFetcher2)
{
  NdnxWrapperPtr ndnx = make_shared<NdnxWrapper> ();

  Name baseName ("/base");
  Name deviceName ("/device");

  thread publishThread(run);

  FetcherTestData data;
  ExecutorPtr executor = make_shared<Executor>(1);
  executor->start ();

  Fetcher fetcher (ndnx,
                   executor,
                   bind (&FetcherTestData::onData, &data, _1, _2, _3, _4),
                   bind (&FetcherTestData::finish, &data, _1, _2),
                   bind (&FetcherTestData::onComplete, &data, _1),
                   bind (&FetcherTestData::onFail, &data, _1),
                   deviceName, baseName, 0, 49,
                   boost::posix_time::seconds (5)); // this time is not precise

  BOOST_CHECK_EQUAL (fetcher.IsActive (), false);
  fetcher.RestartPipeline ();
  BOOST_CHECK_EQUAL (fetcher.IsActive (), true);

  usleep(20000000);
  BOOST_CHECK_EQUAL (data.m_failed, true);

  executor->shutdown ();
}


// BOOST_AUTO_TEST_CASE (NdnxWrapperSelector)
// {

//   Closure closure (bind(dataCallback, _1, _2), bind(timeout, _1));

//   Selectors selectors;
//   selectors.interestLifetime(1);

//   string n1 = "/random/01";
//   c1->sendInterest(Name(n1), closure, selectors);
//   sleep(2);
//   c2->publishData(Name(n1), (const unsigned char *)n1.c_str(), n1.size(), 4);
//   usleep(100000);
//   BOOST_CHECK_EQUAL(g_timeout_counter, 1);
//   BOOST_CHECK_EQUAL(g_dataCallback_counter, 0);

//   string n2 = "/random/02";
//   selectors.interestLifetime(2);
//   c1->sendInterest(Name(n2), closure, selectors);
//   sleep(1);
//   c2->publishData(Name(n2), (const unsigned char *)n2.c_str(), n2.size(), 4);
//   usleep(100000);
//   BOOST_CHECK_EQUAL(g_timeout_counter, 1);
//   BOOST_CHECK_EQUAL(g_dataCallback_counter, 1);

//   // reset
//   g_dataCallback_counter = 0;
//   g_timeout_counter = 0;
// }

BOOST_AUTO_TEST_SUITE_END()