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/*  xr_positional_tracker.h                                              */
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#ifndef XR_POSITIONAL_TRACKER_H
#define XR_POSITIONAL_TRACKER_H

#include "core/os/thread_safe.h"
#include "scene/resources/mesh.h"
#include "servers/xr_server.h"

/**
	@author Bastiaan Olij <mux213@gmail.com>

	The positional tracker object as an object that represents the position and orientation of a tracked object like a controller or headset.
	An AR/VR Interface will registered the trackers it manages with our AR/VR server and update its position and orientation.
	This is where potentially additional AR/VR interfaces may be active as there are AR/VR SDKs that solely deal with positional tracking.
*/

class XRPositionalTracker : public RefCounted {
	GDCLASS(XRPositionalTracker, RefCounted);
	_THREAD_SAFE_CLASS_

public:
	enum TrackerHand {
		TRACKER_HAND_UNKNOWN, /* unknown or not applicable */
		TRACKER_HAND_LEFT, /* controller is the left hand controller */
		TRACKER_HAND_RIGHT /* controller is the right hand controller */
	};

private:
	XRServer::TrackerType type; // type of tracker
	StringName name; // (unique) name of the tracker
	int tracker_id; // tracker index id that is unique per type
	int joy_id; // if we also have a related joystick entity, the id of the joystick
	bool tracking_orientation; // do we track orientation?
	Basis orientation; // our orientation
	bool tracking_position; // do we track position?
	Vector3 rw_position; // our position "in the real world, so without world_scale applied"
	Ref<Mesh> mesh; // when available, a mesh that can be used to render this tracker
	TrackerHand hand; // if known, the hand this tracker is held in
	real_t rumble; // rumble strength, 0.0 is off, 1.0 is maximum, note that we only record here, xr_interface is responsible for execution

protected:
	static void _bind_methods();

public:
	void set_tracker_type(XRServer::TrackerType p_type);
	XRServer::TrackerType get_tracker_type() const;
	void set_tracker_name(const String &p_name);
	StringName get_tracker_name() const;
	int get_tracker_id() const;
	void set_joy_id(int p_joy_id);
	int get_joy_id() const;
	bool is_tracking_orientation() const;
	void set_orientation(const Basis &p_orientation);
	Basis get_orientation() const;
	bool is_tracking_position() const;
	void set_position(const Vector3 &p_position); // set position with world_scale applied
	Vector3 get_position() const; // get position with world_scale applied
	void set_rw_position(const Vector3 &p_rw_position);
	Vector3 get_rw_position() const;
	XRPositionalTracker::TrackerHand get_tracker_hand() const;
	void set_tracker_hand(const XRPositionalTracker::TrackerHand p_hand);
	real_t get_rumble() const;
	void set_rumble(real_t p_rumble);
	void set_mesh(const Ref<Mesh> &p_mesh);
	Ref<Mesh> get_mesh() const;

	Transform3D get_transform(bool p_adjust_by_reference_frame) const;

	XRPositionalTracker();
	~XRPositionalTracker() {}
};

VARIANT_ENUM_CAST(XRPositionalTracker::TrackerHand);

#endif