/**
 * Transfers accelerator plugin for Orthanc
 * Copyright (C) 2018-2021 Osimis S.A., Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program 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
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#include "PluginContext.h"

#include <Compatibility.h>  // For std::unique_ptr
#include <Logging.h>


namespace OrthancPlugins
{
  PluginContext::PluginContext(size_t threadsCount,
                               size_t targetBucketSize,
                               size_t maxPushTransactions,
                               size_t memoryCacheSize,
                               unsigned int maxHttpRetries,
                               unsigned int peerConnectivityTimeout) :
    pushTransactions_(maxPushTransactions),
    semaphore_(threadsCount),
    pluginUuid_(Orthanc::Toolbox::GenerateUuid()),
    threadsCount_(threadsCount),
    targetBucketSize_(targetBucketSize),
    maxHttpRetries_(maxHttpRetries),
    peerConnectivityTimeout_(peerConnectivityTimeout)
  {
    cache_.SetMaxMemorySize(memoryCacheSize);

    LOG(INFO) << "Transfers accelerator will use " << threadsCount_ << " thread(s) to run HTTP queries";
    LOG(INFO) << "Transfers accelerator will keep local DICOM files in a memory cache of size: "
              << OrthancPlugins::ConvertToMegabytes(memoryCacheSize) << " MB";
    LOG(INFO) << "Transfers accelerator will aim at HTTP queries of size: "
              << OrthancPlugins::ConvertToKilobytes(targetBucketSize_) << " KB";
    LOG(INFO) << "Transfers accelerator will be able to receive up to "
              << maxPushTransactions << " push transaction(s) at once";
    LOG(INFO) << "Transfers accelerator will retry "
              << maxHttpRetries_ << " time(s) if some HTTP query fails";
    LOG(INFO) << "Transfers accelerator will use "
              << peerConnectivityTimeout_ << " seconds as a timeout when checking peers connectivity";
  }


  std::unique_ptr<PluginContext>& PluginContext::GetSingleton()
  {
    static std::unique_ptr<PluginContext>  singleton_;
    return singleton_;
  }

  
  void PluginContext::Initialize(size_t threadsCount,
                                 size_t targetBucketSize,
                                 size_t maxPushTransactions,
                                 size_t memoryCacheSize,
                                 unsigned int maxHttpRetries,
                                 unsigned int peerConnectivityTimeout)
  {
    GetSingleton().reset(new PluginContext(threadsCount, targetBucketSize,
                                           maxPushTransactions, memoryCacheSize, maxHttpRetries, peerConnectivityTimeout));
  }

  
  PluginContext& PluginContext::GetInstance()
  {
    if (GetSingleton().get() == NULL)
    {
      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
    }
    else
    {
      return *GetSingleton();
    }
  }
  

  void PluginContext::Finalize()
  {
    if (GetSingleton().get() != NULL)
    {
      GetSingleton().reset();
    }
  }
}