// TODO: hdr
#pragma once

#include <QObject>
#include <QVariant>
#include <QMap>
#include <LtsUtilsSettings/ltsutilssettings_export.h>

class QJsonObject;

namespace LtsUtils
{

class LTSUTILSSETTINGS_EXPORT Settings : public QObject
{
  Q_OBJECT

public:
  ~Settings() = default;

  /**
   * @brief setValue writes a value, identified by the two keys 'group' and the 'identifier', via DDS into the database for the operator
   * @param group First key (e.g. "SituationMap")
   * @param identifier Secondary key (e.g. "zoom-value")
   * @param value The value to be saved to the key values in the database
   */
  void setValue(const QString &group, const QString &identifier, const QVariant &value);

  /**
   * @brief removeValue removes a value, identified by the two keys 'group' and the 'identifier'
   * @param group First key (e.g. "SituationMap")
   * @param identifier Secondary key (e.g. "zoom-value")
   * @param value The value to be saved to the key values in the database
   */
  void removeValue(const QString &group, const QString &identifier);

  /**
   * @brief getValue reads a value, identified by the two keys 'group' and the 'identifier', via DDS from the database for the operator
   * @param group First key (e.g. "SituationMap")
   * @param identifier Secondary key (e.g. "zoom-value")
   * @param defaultValue The value that is returned, if there was no such value, identified by the two keys, was saved in the database
   * @return
   */
  QVariant value(const QString &group, const QString &identifier, const QVariant &defaultValue = QVariant()) const;

  /**
   * @brief identifiers returns a list of identifiers to the corresponding group
   * @param group First key (e.g. "SituationMap")
   * @return
   */
  QStringList identifiers(const QString &group) const;

  void init(const QByteArray &settings);
  QByteArray exportSettings() const;
  void clear();

  void dump();

protected:
  Settings() = default;

signals:
  void valueChanged(const QString &group, const QString &identifier, const QVariant &value);
  void valueRemoved(const QString &group, const QString &identifier);

protected:
  QHash<QString, QVariant> m_data;

};

class LTSUTILSSETTINGS_EXPORT OperatorSettings : public Settings
{
  Q_OBJECT
public:
  static OperatorSettings *getInstance();
};

class LTSUTILSSETTINGS_EXPORT ProjectSettings : public Settings
{
  Q_OBJECT
public:
  static ProjectSettings *getInstance();

  static bool initFromFile(const QString &filename);
  static bool isFunctionEnabled(const QString &group, const QString &function);
};


} // namespace LtsUtils