/*************************************************************************/
/*  area_2d_sw.h                                                         */
/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
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#ifndef AREA_2D_SW_H
#define AREA_2D_SW_H

#include "collision_object_2d_sw.h"
#include "core/self_list.h"
#include "servers/physics_2d_server.h"
//#include "servers/physics/query_sw.h"

class Space2DSW;
class Body2DSW;
class Constraint2DSW;

class Area2DSW : public CollisionObject2DSW {

	Physics2DServer::AreaSpaceOverrideMode space_override_mode;
	real_t gravity;
	Vector2 gravity_vector;
	bool gravity_is_point;
	real_t gravity_distance_scale;
	real_t point_attenuation;
	real_t linear_damp;
	real_t angular_damp;
	int priority;
	bool monitorable;

	ObjectID monitor_callback_id;
	StringName monitor_callback_method;

	ObjectID area_monitor_callback_id;
	StringName area_monitor_callback_method;

	SelfList<Area2DSW> monitor_query_list;
	SelfList<Area2DSW> moved_list;

	struct BodyKey {

		RID rid;
		ObjectID instance_id;
		uint32_t body_shape;
		uint32_t area_shape;

		_FORCE_INLINE_ bool operator<(const BodyKey &p_key) const {

			if (rid == p_key.rid) {

				if (body_shape == p_key.body_shape) {

					return area_shape < p_key.area_shape;
				} else
					return body_shape < p_key.body_shape;
			} else
				return rid < p_key.rid;
		}

		_FORCE_INLINE_ BodyKey() {}
		BodyKey(Body2DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape);
		BodyKey(Area2DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape);
	};

	struct BodyState {

		int state;
		_FORCE_INLINE_ void inc() { state++; }
		_FORCE_INLINE_ void dec() { state--; }
		_FORCE_INLINE_ BodyState() { state = 0; }
	};

	Map<BodyKey, BodyState> monitored_bodies;
	Map<BodyKey, BodyState> monitored_areas;

	//virtual void shape_changed_notify(Shape2DSW *p_shape);
	//virtual void shape_deleted_notify(Shape2DSW *p_shape);
	Set<Constraint2DSW *> constraints;

	virtual void _shapes_changed();
	void _queue_monitor_update();

public:
	//_FORCE_INLINE_ const Matrix32& get_inverse_transform() const { return inverse_transform; }
	//_FORCE_INLINE_ SpaceSW* get_owner() { return owner; }

	void set_monitor_callback(ObjectID p_id, const StringName &p_method);
	_FORCE_INLINE_ bool has_monitor_callback() const { return monitor_callback_id; }

	void set_area_monitor_callback(ObjectID p_id, const StringName &p_method);
	_FORCE_INLINE_ bool has_area_monitor_callback() const { return area_monitor_callback_id; }

	_FORCE_INLINE_ void add_body_to_query(Body2DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape);
	_FORCE_INLINE_ void remove_body_from_query(Body2DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape);

	_FORCE_INLINE_ void add_area_to_query(Area2DSW *p_area, uint32_t p_area_shape, uint32_t p_self_shape);
	_FORCE_INLINE_ void remove_area_from_query(Area2DSW *p_area, uint32_t p_area_shape, uint32_t p_self_shape);

	void set_param(Physics2DServer::AreaParameter p_param, const Variant &p_value);
	Variant get_param(Physics2DServer::AreaParameter p_param) const;

	void set_space_override_mode(Physics2DServer::AreaSpaceOverrideMode p_mode);
	Physics2DServer::AreaSpaceOverrideMode get_space_override_mode() const { return space_override_mode; }

	_FORCE_INLINE_ void set_gravity(real_t p_gravity) { gravity = p_gravity; }
	_FORCE_INLINE_ real_t get_gravity() const { return gravity; }

	_FORCE_INLINE_ void set_gravity_vector(const Vector2 &p_gravity) { gravity_vector = p_gravity; }
	_FORCE_INLINE_ Vector2 get_gravity_vector() const { return gravity_vector; }

	_FORCE_INLINE_ void set_gravity_as_point(bool p_enable) { gravity_is_point = p_enable; }
	_FORCE_INLINE_ bool is_gravity_point() const { return gravity_is_point; }

	_FORCE_INLINE_ void set_gravity_distance_scale(real_t scale) { gravity_distance_scale = scale; }
	_FORCE_INLINE_ real_t get_gravity_distance_scale() const { return gravity_distance_scale; }

	_FORCE_INLINE_ void set_point_attenuation(real_t p_point_attenuation) { point_attenuation = p_point_attenuation; }
	_FORCE_INLINE_ real_t get_point_attenuation() const { return point_attenuation; }

	_FORCE_INLINE_ void set_linear_damp(real_t p_linear_damp) { linear_damp = p_linear_damp; }
	_FORCE_INLINE_ real_t get_linear_damp() const { return linear_damp; }

	_FORCE_INLINE_ void set_angular_damp(real_t p_angular_damp) { angular_damp = p_angular_damp; }
	_FORCE_INLINE_ real_t get_angular_damp() const { return angular_damp; }

	_FORCE_INLINE_ void set_priority(int p_priority) { priority = p_priority; }
	_FORCE_INLINE_ int get_priority() const { return priority; }

	_FORCE_INLINE_ void add_constraint(Constraint2DSW *p_constraint) { constraints.insert(p_constraint); }
	_FORCE_INLINE_ void remove_constraint(Constraint2DSW *p_constraint) { constraints.erase(p_constraint); }
	_FORCE_INLINE_ const Set<Constraint2DSW *> &get_constraints() const { return constraints; }
	_FORCE_INLINE_ void clear_constraints() { constraints.clear(); }

	void set_monitorable(bool p_monitorable);
	_FORCE_INLINE_ bool is_monitorable() const { return monitorable; }

	void set_transform(const Transform2D &p_transform);

	void set_space(Space2DSW *p_space);

	void call_queries();

	Area2DSW();
	~Area2DSW();
};

void Area2DSW::add_body_to_query(Body2DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape) {

	BodyKey bk(p_body, p_body_shape, p_area_shape);
	monitored_bodies[bk].inc();
	if (!monitor_query_list.in_list())
		_queue_monitor_update();
}
void Area2DSW::remove_body_from_query(Body2DSW *p_body, uint32_t p_body_shape, uint32_t p_area_shape) {

	BodyKey bk(p_body, p_body_shape, p_area_shape);
	monitored_bodies[bk].dec();
	if (!monitor_query_list.in_list())
		_queue_monitor_update();
}

void Area2DSW::add_area_to_query(Area2DSW *p_area, uint32_t p_area_shape, uint32_t p_self_shape) {

	BodyKey bk(p_area, p_area_shape, p_self_shape);
	monitored_areas[bk].inc();
	if (!monitor_query_list.in_list())
		_queue_monitor_update();
}
void Area2DSW::remove_area_from_query(Area2DSW *p_area, uint32_t p_area_shape, uint32_t p_self_shape) {

	BodyKey bk(p_area, p_area_shape, p_self_shape);
	monitored_areas[bk].dec();
	if (!monitor_query_list.in_list())
		_queue_monitor_update();
}

#endif // AREA_2D_SW_H
