/*************************************************************************/
/*  webxr_interface_js.h                                                 */
/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#ifndef WEBXR_INTERFACE_JS_H
#define WEBXR_INTERFACE_JS_H

#ifdef JAVASCRIPT_ENABLED

#include "webxr_interface.h"

/**
	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;
	Ref<XRPositionalTracker> head_tracker;

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

	// TODO maybe turn into a vector to support more then 2 controllers...
	bool controllers_state[2];
	Ref<XRPositionalTracker> controllers[2];
	Size2 render_targetsize;

	Transform3D _js_matrix_to_transform(float *p_js_matrix);
	void _update_tracker(int p_controller_id);

public:
	virtual void is_session_supported(const String &p_session_mode) override;
	virtual void set_session_mode(String p_session_mode) override;
	virtual String get_session_mode() const override;
	virtual void set_required_features(String p_required_features) override;
	virtual String get_required_features() const override;
	virtual void set_optional_features(String p_optional_features) override;
	virtual String get_optional_features() const override;
	virtual void set_requested_reference_space_types(String p_requested_reference_space_types) override;
	virtual String get_requested_reference_space_types() const override;
	void _set_reference_space_type(String p_reference_space_type);
	virtual String get_reference_space_type() const override;
	virtual Ref<XRPositionalTracker> get_controller(int p_controller_id) const override;
	virtual String get_visibility_state() const override;
	virtual PackedVector3Array get_bounds_geometry() const override;

	virtual StringName get_name() const override;
	virtual uint32_t get_capabilities() const override;

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

	virtual Size2 get_render_target_size() override;
	virtual uint32_t get_view_count() override;
	virtual Transform3D get_camera_transform() override;
	virtual Transform3D get_transform_for_view(uint32_t p_view, const Transform3D &p_cam_transform) override;
	virtual CameraMatrix get_projection_for_view(uint32_t p_view, double p_aspect, double p_z_near, double p_z_far) override;
	virtual Vector<BlitToScreen> post_draw_viewport(RID p_render_target, const Rect2 &p_screen_rect) override;

	virtual void process() override;

	void _on_controller_changed();

	WebXRInterfaceJS();
	~WebXRInterfaceJS();
};

#endif // JAVASCRIPT_ENABLED

#endif // WEBXR_INTERFACE_JS_H