/**
  * @RDE_HEADER@
  * OperatorSettingsObserver
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Christian Fröbel, NLSE, 2018-04-10
  */

#pragma once

#include <AudioVideoManagement/ava_types.h>
#include <boost/optional.hpp>
#include <QChar>
#include <QObject>
#include <memory>

namespace OperatorManagement
{

namespace Interface
{
class Dtc;
}

class User;

} // namespace OperatorManagement


namespace ExerciseManagement
{

namespace Interface
{
class Dtc;
}

class Exercise;

} // namespace ExerciseManagement


namespace LtsUtils
{
class OperatorSettings;
}


enum class DataModification;


namespace AudioVideoManagement
{

/**
 * Small helper class to observe the following parts of the Operator's settings:
 * - audio priority
 * - timezone
 *
 * @author Christian Fröbel
 */
class OperatorSettingsObserver : public QObject
{
  Q_OBJECT
  
public:
  OperatorSettingsObserver(int exerciseId, int operatorId, OperatorManagement::Interface::Dtc *opmDtc, ExerciseManagement::Interface::Dtc *exmDtc);
  ~OperatorSettingsObserver();
  
  QChar timezone() const;

signals:
  void audioPrioChanged(AvaAudioPrio newPrio);
  void timezoneChanged(QChar newTimezone);
  
private slots:
  void onOperatorChanged(const OperatorManagement::User &operator_, DataModification modType);
  void onExerciseChanged(const ExerciseManagement::Exercise &exercise, DataModification modType);
  void onSettingsValueChanged(const QString &group, const QString &identifier, const QVariant &value);
  
private:
  class TimezoneCalculator;

  int                                   m_exerciseId;
  int                                   m_operatorId;
  OperatorManagement::Interface::Dtc   *m_opmDtc;
  ExerciseManagement::Interface::Dtc   *m_exmDtc;
  LtsUtils::OperatorSettings           *m_operatorSettings;
  std::unique_ptr<TimezoneCalculator>   m_timezoneCalculator;
  boost::optional<AvaAudioPrio>         m_currentPrio;
};

} // namespace AudioVideoManagement