/**
  * @RDE_HEADER@
  * Base class for ScreenToLocation and LocationToElevation
  * $Id$
  * $HeadURL$
  * $Author$
  */

#pragma once

// Own
#include <situation_map_export.h>
#include <Common/situation_map_logging.h>


// ESRI


// Qt
#include <QUuid>
#include <QTimer>


namespace Esri {
namespace ArcGISRuntime
{
class TaskWatcher;
}
}


//----------------------------------------------------------------------------
namespace SituationMap
{
/**
 * @brief The ScreenLocationElevationHelperBase class limits the load of
 * e.g. Esri::ArcGISRuntime::SceneGraphicsView::screenToLocation
 * (cpu load of ~50% was recognized othjerwise)
 * This class limits this to 10 computations per second.
 */
class SITUATIONMAP_EXPORT ScreenLocationElevationHelperBase : public QObject
{
  Q_OBJECT

  using BaseClass = QObject;

public:
  /*! \name Construction, Destruction */
  //@{
  explicit ScreenLocationElevationHelperBase(QObject *parent = nullptr);
  virtual ~ScreenLocationElevationHelperBase();

  int pendingOperationsCount() const;
  void cancel();
  void stop();

  void newComputationRequested();

  ScreenLocationElevationHelperBase(const ScreenLocationElevationHelperBase &other)      = delete;
  ScreenLocationElevationHelperBase &operator=(ScreenLocationElevationHelperBase &other) = delete;
  //@}

  virtual void mainComputation() = 0;

private Q_SLOTS:
  void onMainTimoutInternal();
  void onKillTimout();

protected:
  bool insertTask(const Esri::ArcGISRuntime::TaskWatcher &tw);
  bool removeTask(const QUuid &taskId);

private:
  LOGGER_T m_logger;      ///< Interface of the Logging-Facility

  class Private;
  /**
      * The private d->pointer to not break BC when changing internals of this class
     */
  Private *d = nullptr;
};

} // namespace SituationMap