/**************************************************************************/
/*  navigation_polygon.h                                                  */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
/* the following conditions:                                              */
/*                                                                        */
/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
/*                                                                        */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
/**************************************************************************/

#ifndef NAVIGATION_POLYGON_H
#define NAVIGATION_POLYGON_H

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

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

	PoolVector<Vector2> vertices;
	struct Polygon {
		Vector<int> indices;
	};
	Vector<Polygon> polygons;
	Vector<PoolVector<Vector2>> outlines;

	mutable Rect2 item_rect;
	mutable bool rect_cache_dirty = true;

	Mutex navmesh_generation;
	// Navigation mesh
	Ref<NavigationMesh> navmesh;

protected:
	static void _bind_methods();

	void _set_polygons(const Array &p_array);
	Array _get_polygons() const;

	void _set_outlines(const Array &p_array);
	Array _get_outlines() const;

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

	void set_vertices(const PoolVector<Vector2> &p_vertices);
	PoolVector<Vector2> get_vertices() const;

	void add_polygon(const Vector<int> &p_polygon);
	int get_polygon_count() const;

	void add_outline(const PoolVector<Vector2> &p_outline);
	void add_outline_at_index(const PoolVector<Vector2> &p_outline, int p_index);
	void set_outline(int p_idx, const PoolVector<Vector2> &p_outline);
	PoolVector<Vector2> get_outline(int p_idx) const;
	void remove_outline(int p_idx);
	int get_outline_count() const;

	void clear_outlines();
	void make_polygons_from_outlines();

	Vector<int> get_polygon(int p_idx);
	void clear_polygons();

	Ref<NavigationMesh> get_mesh();

	NavigationPolygon();
	~NavigationPolygon();
};

class Navigation2D;

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

	bool enabled = true;
	RID region;
	Navigation2D *navigation = nullptr;
	Ref<NavigationPolygon> navpoly;

	real_t enter_cost = 0.0;
	real_t travel_cost = 1.0;

	uint32_t navigation_layers = 1;

	void _navpoly_changed();
	void _map_changed(RID p_map);

protected:
	void _notification(int p_what);
	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_enabled(bool p_enabled);
	bool is_enabled() const;

	void set_navigation_layers(uint32_t p_navigation_layers);
	uint32_t get_navigation_layers() const;

	RID get_region_rid() const;

	void set_enter_cost(real_t p_enter_cost);
	real_t get_enter_cost() const;

	void set_travel_cost(real_t p_travel_cost);
	real_t get_travel_cost() const;

	void set_navigation_polygon(const Ref<NavigationPolygon> &p_navpoly);
	Ref<NavigationPolygon> get_navigation_polygon() const;

	String get_configuration_warning() const;

	NavigationPolygonInstance();
	~NavigationPolygonInstance();
};

#endif // NAVIGATION_POLYGON_H