/*
 * @project        The CERN Tape Archive (CTA)
 * @copyright      Copyright(C) 2003-2021 CERN
 * @license        This program 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.
 *
 *                 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 General Public License for more details.
 *
 *                 You should have received a copy of the GNU General Public License
 *                 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "castor/tape/tapeserver/daemon/DiskWriteThreadPool.hpp"
#include "castor/tape/tapeserver/daemon/RecallTaskInjector.hpp"
#include "castor/tape/tapeserver/daemon/RecallReportPacker.hpp"
#include "castor/tape/tapeserver/daemon/ReportPackerInterface.hpp"
#include "common/log/LogContext.hpp"
#include "common/log/StringLogger.hpp"
#include "castor/tape/tapeserver/daemon/MigrationMemoryManager.hpp"
#include "castor/tape/tapeserver/daemon/MemBlock.hpp"
#include "castor/messages/TapeserverProxyDummy.hpp"
#include "scheduler/TapeMountDummy.hpp"
#include "catalogue/DummyCatalogue.hpp"
#include <gtest/gtest.h>

namespace unitTests{
  
  class TestingDatabaseRetrieveMount: public cta::SchedulerDatabase::RetrieveMount {
    const MountInfo & getMountInfo() override { throw std::runtime_error("Not implemented"); }
    std::list<std::unique_ptr<cta::SchedulerDatabase::RetrieveJob> > getNextJobBatch(uint64_t filesRequested, uint64_t bytesRequested, cta::disk::DiskSystemFreeSpaceList & diskSystemFreeSpace, cta::log::LogContext& logContext) override { throw std::runtime_error("Not implemented");}

    void complete(time_t completionTime) override { throw std::runtime_error("Not implemented"); }
    void setDriveStatus(cta::common::dataStructures::DriveStatus status, time_t completionTime, const cta::optional<std::string> & reason) override { throw std::runtime_error("Not implemented"); }
    void setTapeSessionStats(const castor::tape::tapeserver::daemon::TapeSessionStats &stats) override { throw std::runtime_error("Not implemented"); }
    void flushAsyncSuccessReports(std::list<cta::SchedulerDatabase::RetrieveJob*>& jobsBatch, cta::log::LogContext& lc) override { throw std::runtime_error("Not implemented"); }
  };
  
  class TestingRetrieveMount: public cta::RetrieveMount {
  public:
    TestingRetrieveMount(cta::catalogue::Catalogue &catalogue, std::unique_ptr<cta::SchedulerDatabase::RetrieveMount> dbrm): RetrieveMount(catalogue, std::move(dbrm)) {
    }
  };
  
  class TestingRetrieveJob: public cta::RetrieveJob {
  public:
    TestingRetrieveJob(): cta::RetrieveJob(nullptr,
    cta::common::dataStructures::RetrieveRequest(), 
    cta::common::dataStructures::ArchiveFile(), 1,
    cta::PositioningMethod::ByBlock) {}
  };
  

  
  using namespace castor::tape::tapeserver::daemon;
  using namespace castor::tape::tapeserver::client;
  struct MockRecallReportPacker : public RecallReportPacker {
    void reportCompletedJob(std::unique_ptr<cta::RetrieveJob> successfulRetrieveJob) {
      cta::threading::MutexLocker ml(m_mutex);
      completeJobs++;
    }
    void reportFailedJob(std::unique_ptr<cta::RetrieveJob> failedRetrieveJob) {
      cta::threading::MutexLocker ml(m_mutex);
      failedJobs++;
    }
    void disableBulk() {}
    void reportEndOfSession() {
      cta::threading::MutexLocker ml(m_mutex);
      endSessions++;
    }
    void reportEndOfSessionWithErrors(const std::string msg, int error_code) {
      cta::threading::MutexLocker ml(m_mutex);
      endSessionsWithError++;
    }
    MockRecallReportPacker(cta::RetrieveMount *rm, cta::log::LogContext lc):
      RecallReportPacker(rm,lc), completeJobs(0), failedJobs(0),
      endSessions(0), endSessionsWithError(0) {}
    cta::threading::Mutex m_mutex;
    int completeJobs;
    int failedJobs;
    int endSessions;
    int endSessionsWithError;
  };
  
  struct MockTaskInjector : public RecallTaskInjector{
    MOCK_METHOD3(requestInjection, void(int maxFiles, int maxBlocks, bool lastCall));
  };
  
  TEST(castor_tape_tapeserver_daemon, DiskWriteThreadPoolTest){
    using ::testing::_;
    
    cta::log::StringLogger log("dummy","castor_tape_tapeserver_daemon_DiskWriteThreadPoolTest",cta::log::DEBUG);
    cta::log::LogContext lc(log);
    
    std::unique_ptr<cta::SchedulerDatabase::RetrieveMount> dbrm(new TestingDatabaseRetrieveMount);
    std::unique_ptr<cta::catalogue::Catalogue> catalogue(new cta::catalogue::DummyCatalogue);
    TestingRetrieveMount trm(*catalogue, std::move(dbrm));
    MockRecallReportPacker report(&trm,lc);    
    
    RecallMemoryManager mm(10,100,lc);
    
    castor::messages::TapeserverProxyDummy tspd;
    cta::TapeMountDummy tmd;
    RecallWatchDog rwd(1,1,tspd,tmd,"", lc);
    
    DiskWriteThreadPool dwtp(2,report,rwd,lc,"/dev/null", 0);
    dwtp.startThreads();
       
    for(int i=0;i<5;++i){
      std::unique_ptr<TestingRetrieveJob> fileToRecall(new TestingRetrieveJob());
      fileToRecall->retrieveRequest.archiveFileID = i+1;
      fileToRecall->retrieveRequest.dstURL = "/dev/null";
      fileToRecall->selectedCopyNb=1;
      cta::common::dataStructures::TapeFile tf;
      tf.copyNb = 1;
      fileToRecall->archiveFile.tapeFiles.push_back(tf);
      fileToRecall->selectedTapeFile().blockId = 1;
      DiskWriteTask* t=new DiskWriteTask(fileToRecall.release(),mm);
      MemBlock* mb=mm.getFreeBlock();
      mb->m_fileid=i+1;
      mb->m_fileBlock=0;
      t->pushDataBlock(mb);
      t->pushDataBlock(NULL);
      dwtp.push(t);
    }
     
    dwtp.finish();
    dwtp.waitThreads();
    ASSERT_EQ(5, report.completeJobs);
    ASSERT_EQ(1, report.endSessions);
  }

}