/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2020                                                               *
 *                                                                                       *
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#ifndef __OPENSPACE_CORE___INTERACTIONMONITOR___H__
#define __OPENSPACE_CORE___INTERACTIONMONITOR___H__

#include <openspace/properties/propertyowner.h>

#include <openspace/properties/scalar/boolproperty.h>
#include <openspace/properties/scalar/floatproperty.h>

namespace openspace::interaction {

/**
 * The class InteractionMonitor keeps track of user interactions during an OpenSpace
 * session. It keeps track of when the latest interaction was made and of when the state
 * changes to idle.
 */
class InteractionMonitor : public properties::PropertyOwner {
public:
    InteractionMonitor();

    void setActivityState(bool isActive);
    void setIdleTime(float time);

    /*
     * Called every frame from OpenSpaceEngine and calculates the activity state depending
     * on the last registered interaction.
     */
    void updateActivityState();

    /*
     * Called from all places we want to mark activity from. Updates the last registered
     * interaction time
     */
    void markInteraction();

private:
    double _lastInteractionTime = 0;
    properties::BoolProperty _isInActiveState;
    properties::FloatProperty _idleTime; // in seconds

    // @TODO (lovisa) make a list of interactions to listen for
    // and only allow registering updates from those interactions
};

} // namespace openspace::interaction

#endif // __OPENSPACE_CORE___INTERACTIONMONITOR___H__
