/**************************************************************************/
/*  nav_map_iteration_3d.h                                                */
/**************************************************************************/
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/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#ifndef NAV_MAP_ITERATION_3D_H
#define NAV_MAP_ITERATION_3D_H

#include "../nav_rid.h"
#include "../nav_utils.h"
#include "nav_mesh_queries_3d.h"

#include "core/math/math_defs.h"
#include "core/os/semaphore.h"

struct NavLinkIteration;
class NavRegion;
struct NavRegionIteration;
struct NavMapIteration;

struct NavMapIterationBuild {
	Vector3 merge_rasterizer_cell_size;
	bool use_edge_connections = true;
	real_t edge_connection_margin;
	real_t link_connection_radius;
	gd::PerformanceData performance_data;
	int polygon_count = 0;
	int free_edge_count = 0;

	HashMap<gd::EdgeKey, gd::EdgeConnectionPair, gd::EdgeKey> iter_connection_pairs_map;
	LocalVector<gd::Edge::Connection> iter_free_edges;

	NavMapIteration *map_iteration = nullptr;

	int navmesh_polygon_count = 0;
	int link_polygon_count = 0;

	void reset() {
		performance_data.reset();

		iter_connection_pairs_map.clear();
		iter_free_edges.clear();
		polygon_count = 0;
		free_edge_count = 0;

		navmesh_polygon_count = 0;
		link_polygon_count = 0;
	}
};

struct NavMapIteration {
	mutable SafeNumeric<uint32_t> users;
	RWLock rwlock;

	Vector3 map_up;
	LocalVector<gd::Polygon> link_polygons;

	LocalVector<NavRegionIteration> region_iterations;
	LocalVector<NavLinkIteration> link_iterations;

	int navmesh_polygon_count = 0;
	int link_polygon_count = 0;

	// The edge connections that the map builds on top with the edge connection margin.
	HashMap<uint32_t, LocalVector<gd::Edge::Connection>> external_region_connections;

	HashMap<NavRegion *, uint32_t> region_ptr_to_region_id;

	LocalVector<NavMeshQueries3D::PathQuerySlot> path_query_slots;
	Mutex path_query_slots_mutex;
	Semaphore path_query_slots_semaphore;
};

class NavMapIterationRead {
	const NavMapIteration &map_iteration;

public:
	_ALWAYS_INLINE_ NavMapIterationRead(const NavMapIteration &p_iteration) :
			map_iteration(p_iteration) {
		map_iteration.rwlock.read_lock();
		map_iteration.users.increment();
	}
	_ALWAYS_INLINE_ ~NavMapIterationRead() {
		map_iteration.users.decrement();
		map_iteration.rwlock.read_unlock();
	}
};

#endif // NAV_MAP_ITERATION_3D_H