/*************************************************************************/
/*  webxr_interface_js.h                                                 */
/*************************************************************************/
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#ifndef WEBXR_INTERFACE_JS_H
#define WEBXR_INTERFACE_JS_H

#ifdef JAVASCRIPT_ENABLED

#include "webxr_interface.h"

/**
	@author David Snopek <david.snopek@snopekgames.com>

	The WebXR interface is a VR/AR interface that can be used on the web.
*/

class WebXRInterfaceJS : public WebXRInterface {
	GDCLASS(WebXRInterfaceJS, WebXRInterface);

private:
	bool initialized;
	bool xr_standard_mapping;

	String session_mode;
	String required_features;
	String optional_features;
	String requested_reference_space_types;
	String reference_space_type;

	bool controllers_state[2];
	bool touching[5];
	Size2 render_targetsize;

	Transform _js_matrix_to_transform(float *p_js_matrix);
	void _update_tracker(int p_controller_id);

	Vector2 _get_joy_vector_from_axes(int *p_axes);
	int _get_touch_index(int p_input_source);
	Vector2 _get_screen_position_from_joy_vector(const Vector2 &p_joy_vector);

public:
	virtual void is_session_supported(const String &p_session_mode);
	virtual void set_session_mode(String p_session_mode);
	virtual String get_session_mode() const;
	virtual void set_required_features(String p_required_features);
	virtual String get_required_features() const;
	virtual void set_optional_features(String p_optional_features);
	virtual String get_optional_features() const;
	virtual void set_requested_reference_space_types(String p_requested_reference_space_types);
	virtual String get_requested_reference_space_types() const;
	void _set_reference_space_type(String p_reference_space_type);
	virtual String get_reference_space_type() const;
	virtual Ref<ARVRPositionalTracker> get_controller(int p_controller_id) const;
	virtual TargetRayMode get_controller_target_ray_mode(int p_controller_id) const;
	virtual String get_visibility_state() const;
	virtual PoolVector3Array get_bounds_geometry() const;
	virtual void set_xr_standard_mapping(bool p_xr_standard_mapping);
	virtual bool get_xr_standard_mapping() const;

	virtual StringName get_name() const;
	virtual int get_capabilities() const;

	virtual bool is_initialized() const;
	virtual bool initialize();
	virtual void uninitialize();

	virtual Size2 get_render_targetsize();
	virtual bool is_stereo();
	virtual Transform get_transform_for_eye(ARVRInterface::Eyes p_eye, const Transform &p_cam_transform);
	virtual CameraMatrix get_projection_for_eye(ARVRInterface::Eyes p_eye, real_t p_aspect, real_t p_z_near, real_t p_z_far);
	virtual void commit_for_eye(ARVRInterface::Eyes p_eye, RID p_render_target, const Rect2 &p_screen_rect);

	virtual void process();
	virtual void notification(int p_what);

	void _on_controller_changed();
	void _on_input_event(int p_event_type, int p_input_source);

	WebXRInterfaceJS();
	~WebXRInterfaceJS();
};

#endif // JAVASCRIPT_ENABLED

#endif // WEBXR_INTERFACE_JS_H