/*************************************************************************/
/*  light_occluder_2d.h                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef LIGHT_OCCLUDER_2D_H
#define LIGHT_OCCLUDER_2D_H

#include "scene/2d/node_2d.h"

class OccluderPolygon2D : public Resource {
	GDCLASS(OccluderPolygon2D, Resource);

public:
	enum CullMode {
		CULL_DISABLED,
		CULL_CLOCKWISE,
		CULL_COUNTER_CLOCKWISE
	};

private:
	RID occ_polygon;
	Vector<Vector2> polygon;
	bool closed = true;
	CullMode cull = CULL_DISABLED;

	mutable Rect2 item_rect;
	mutable bool rect_cache_dirty = true;

protected:
	static void _bind_methods();

public:
#ifdef TOOLS_ENABLED
	virtual Rect2 _edit_get_rect() const;
	virtual bool _edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const;
#endif

	void set_polygon(const Vector<Vector2> &p_polygon);
	Vector<Vector2> get_polygon() const;

	void set_closed(bool p_closed);
	bool is_closed() const;

	void set_cull_mode(CullMode p_mode);
	CullMode get_cull_mode() const;

	virtual RID get_rid() const override;
	OccluderPolygon2D();
	~OccluderPolygon2D();
};

VARIANT_ENUM_CAST(OccluderPolygon2D::CullMode);

class LightOccluder2D : public Node2D {
	GDCLASS(LightOccluder2D, Node2D);

	RID occluder;
	int mask = 1;
	Ref<OccluderPolygon2D> occluder_polygon;
	bool sdf_collision = false;
	void _poly_changed();

protected:
	void _notification(int p_what);
	static void _bind_methods();

public:
#ifdef TOOLS_ENABLED
	virtual Rect2 _edit_get_rect() const override;
	virtual bool _edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const override;
#endif

	void set_occluder_polygon(const Ref<OccluderPolygon2D> &p_polygon);
	Ref<OccluderPolygon2D> get_occluder_polygon() const;

	void set_occluder_light_mask(int p_mask);
	int get_occluder_light_mask() const;

	void set_as_sdf_collision(bool p_enable);
	bool is_set_as_sdf_collision() const;

	TypedArray<String> get_configuration_warnings() const override;

	LightOccluder2D();
	~LightOccluder2D();
};

#endif // LIGHT_OCCLUDER_2D_H