#include "lts_session_lock_handler.h"

#include <LtsWidgets/lts_message_dialog.h>
#include <LtsSession/lts_session_data.h>

#include <QDebug>

#include <sstream>


namespace LtsSession
{

TopicLockHandler::TopicLockHandler()
  : QObject()
  , m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger().getNGLLogger("LtsSession.TopicLockHandler"))
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " START";
  TRACE_LOG(m_logger) << LOGFUNCTION << " END";
}

TopicLockHandler::~TopicLockHandler()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " START";
  TRACE_LOG(m_logger) << LOGFUNCTION << " END";
}

bool TopicLockHandler::init(const std::shared_ptr<Core::Interface::Ftc> &coreFtc,
                            int exerciseId)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " START";
  if (coreFtc == nullptr)
    return false;
  coreFtc->enableAll();
  m_exerciseId = exerciseId;
  m_coreFtc = coreFtc;

  TRACE_LOG(m_logger) << LOGFUNCTION << " END";
  return true;
}


bool TopicLockHandler::lock()
{
  INFO_LOG(m_logger) << "LOCK " << m_topicInfo.topicName();
  TRACE_LOG(m_logger) << LOGFUNCTION << objStateAsString();

  if (m_coreFtc == nullptr)
    return false;

  if (m_locked)
  {
    ERROR_LOG(m_logger) << LOGFUNCTION << ": called lock while still locked! " << m_lockEntityId;
    Q_ASSERT(false);
    return false;
  }

  const auto *sessionData = LtsSessionData::LtsSessionData::getInstance();

  Core::TryLockEntityRequest req;
  req.id(m_lockEntityId); 
  
  req.entityTypeName(m_topicInfo.topicName().toStdString());
  req.entityId(m_topicInfo.entityId());
  req.exerciseId(m_exerciseId);
  
  req.operatorId(sessionData->getOperatorId());
  req.workstationId(sessionData->getWorkstationId());

  try
  {
    const Core::TryLockEntityReply reply(m_coreFtc->tryLockEntityRequest(req));

    TRACE_LOG(m_logger) << LOGFUNCTION << ": Reply received - state=" << objStateAsString()
                        << " - reply=" << reply;

    if (reply.alreadyLocked().is_set()) 
    {
      const Core::LockEntityError &alreadyLocked = reply.alreadyLocked().get();
      INFO_LOG(m_logger) << LOGFUNCTION << ": Topic already locked by ws " << alreadyLocked.workstationName() << " and op " << alreadyLocked.operatorName();

      
      

      const auto lockedBy(QStringLiteral("%2/%1").arg(QString::fromStdString(alreadyLocked.operatorName()), QString::fromStdString(alreadyLocked.workstationName())));

      emit signalLockDialog(lockedBy); 
    }
    else 
    {
      DEBUG_LOG(m_logger) << LOGFUNCTION << ": Topic NOT already locked";

      Q_ASSERT(reply.id() > 0);
      m_locked = true;
      m_lockEntityId = reply.id(); 
    }
  }
  catch (const std::runtime_error &err)
  {
    ERROR_LOG(m_logger) << LOGFUNCTION << ": Failed to lock topic! " << err.what();
    Q_ASSERT(false);
    return false;
  }

  return true;
}

bool TopicLockHandler::unlock()
{
  INFO_LOG(m_logger) << "UNLOCK " << m_topicInfo.topicName() << " - " << m_lockEntityId;
  TRACE_LOG(m_logger) << LOGFUNCTION << objStateAsString();

  if (m_coreFtc == nullptr)
    return false;

  if (!m_locked)
  {
    ERROR_LOG(m_logger) << LOGFUNCTION << ": Tried to unlock while unlocked.. " << objStateAsString();
    Q_ASSERT(false);
    return false;
  }

  Q_ASSERT(m_lockEntityId > 0); 

  const Core::TryUnlockEntityRequest req(m_lockEntityId);

  
  m_locked = false;
  m_lockEntityId = 0;

  try
  {
    const auto reply(m_coreFtc->tryUnlockEntityRequest(req));

    TRACE_LOG(m_logger) << LOGFUNCTION << ": Reply received - state=" << objStateAsString()
                        << " - reply=" << reply;

    DEBUG_LOG(m_logger) << LOGFUNCTION << ": Topic unlocked!";
  }
  catch (const std::runtime_error &err)
  {
    ERROR_LOG(m_logger) << LOGFUNCTION << ": Failed to unlock topic! " << err.what();
    return false;
  }


  
  emit signalUnlockDialog();  

  

  return true;
}


std::string TopicLockHandler::objStateAsString() const
{
  std::ostringstream o;
  o << " m_topicInfoId=" << m_lockEntityId
    << ", entityId=" << m_topicInfo.entityId()
    << ", exId=" << m_exerciseId
    << ", lckd=" << m_locked
    << ", asked=" << m_askedForLock
    << ", delftrAnwr=" << m_deleteAfterAnswer;
  return o.str();
}


bool TopicLockHandler::slotUnlock()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " slotUnlock" << objStateAsString();
  return unlock();
}


void TopicLockHandler::slotTryLock(const LtsWidgets::TopicInfo &topicInfo)
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " START " << objStateAsString();

  m_topicInfo = topicInfo;

  if (m_topicInfo.topicName().isEmpty() || !topicInfo.isValid())
  {
    DEBUG_LOG(m_logger) << LOGFUNCTION << " no lockable topic, that's okay";
    return;
  }

  lock();
  TRACE_LOG(m_logger) << LOGFUNCTION << " END " << objStateAsString();
}


void TopicLockHandler::slotFinalize()
{
  TRACE_LOG(m_logger) << LOGFUNCTION << " START " << objStateAsString();

  if (m_locked)
  {
    slotUnlock(); 
  }

  deleteLater();

  TRACE_LOG(m_logger) << LOGFUNCTION << " END " << objStateAsString();
}




TopicLockHanderData::TopicLockHanderData()
  : QObject()
{
}

void TopicLockHanderData::init(const std::shared_ptr<Core::Interface::Ftc> &coreFtc, int exerciseId)
{
  m_topicLockHandler = new TopicLockHandler();
  m_topicLockHandler->init(coreFtc, exerciseId);

  connect(m_topicLockHandler.data(), &TopicLockHandler::signalLockDialog,
          this, &TopicLockHanderData::slotLock, Qt::UniqueConnection);
  connect(m_topicLockHandler.data(), &TopicLockHandler::signalUnlockDialog,
          this, &TopicLockHanderData::slotUnlock, Qt::UniqueConnection);
}

TopicLockHanderData::~TopicLockHanderData()
{
  
  if (m_topicLockHandler)
    m_topicLockHandler->slotFinalize();
}

void TopicLockHanderData::unlock()
{
  qDebug() << "Debugname=" << m_debugName << ": "
              << " slotUnlock";
  if (m_topicLockHandler)
    m_topicLockHandler->slotUnlock();
}

bool TopicLockHanderData::isLocked() const
{
  if (!m_topicLockHandler)
  {
    qDebug() << "Debugname=" << m_debugName << ": "
              << " isLocked -> no handler";
    return false;
  }
  qDebug() << "Debugname=" << m_debugName << ": "
              << " isLocked = " << m_topicLockHandler->isLocked();
  return m_topicLockHandler->isLocked();
}

LtsWidgets::TopicInfo TopicLockHanderData::getTopicInfo() const
{
  if (m_topicLockHandler)
    return m_topicLockHandler->getTopicInfo();
  return {};
}

void TopicLockHanderData::slotTryLock(const LtsWidgets::TopicInfo &topicInfo)
{
  qDebug() << "Debugname=" << m_debugName << ": "
              << "slotTryLock " << m_topicLockHandler;
  if (!m_topicLockHandler)
    return;
  m_topicLockHandler->slotTryLock(topicInfo);
}


void TopicLockHanderData::slotLock(const QString &lockedBy)
{


  qDebug() << "Debugname=" << m_debugName << ": "
              << "slotLock";
  m_lockedBy = lockedBy;
  emit lockDataChanged();
}

void TopicLockHanderData::slotUnlock()
{
  qDebug() << "Debugname=" << m_debugName << ": "
              << "slotUnlock";
  m_lockedBy.clear();
  emit lockDataChanged();
}


}