#pragma once

#include "scene/3d/path_3d.h"
#include "terrain/shared_mutex.h"
#include "terrain/terrain_modifier.h"

class TerrainModifierPath : public TerrainModifier {
	GDCLASS(TerrainModifierPath, TerrainModifier);
	static void _bind_methods();
	void curves_changed();
	bool update_bounds();

protected:
	void _notification(int what);

public:
	float evaluate_at(Vector2 world_coordinate, float before) override;
	void path_changed();
	void children_changed();
	PackedStringArray get_configuration_warnings() const override;

private:
	SharedMutex lock{};
	Path3D *path{ nullptr };
	Transform3D global_path_transform{};
	Ref<Curve3D> path_buffer{};
	Ref<Curve> curve_left_buffer{};
	Ref<Curve> curve_left{};
	Ref<Curve> curve_right_buffer{};
	Ref<Curve> curve_right{};

public:
	void set_curve_left(Ref<Curve> curve);
	Ref<Curve> get_curve_left() const;
	void set_curve_right(Ref<Curve> curve);
	Ref<Curve> get_curve_right() const;
};