/*
 Copyright (C) 2014 Erik Ogenvik

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#ifndef VOIDDOMAIN_H_
#define VOIDDOMAIN_H_

#include "rules/simulation/Domain.h"

/**
 * @brief An empty domain, in which nothing can move, and nothing can be seen.
 */
class VoidDomain : public Domain {
public:
	explicit VoidDomain(LocatedEntity& entity);

	~VoidDomain() override = default;

	bool isEntityVisibleFor(const LocatedEntity& observingEntity, const LocatedEntity& observedEntity) const override;

	void getVisibleEntitiesFor(const LocatedEntity& observingEntity, std::list<LocatedEntity*>& entityList) const override;

	void addEntity(LocatedEntity& entity) override;

	void removeEntity(LocatedEntity& entity) override;

	bool isEntityReachable(const LocatedEntity& reachingEntity, double reach, const LocatedEntity& queriedEntity, const WFMath::Point<3>& positionOnQueriedEntity) const override;

	std::optional<std::function<void()>> observeCloseness(LocatedEntity& reacher, LocatedEntity& target, double reach, std::function<void()> callback) override;

};

#endif /* VOIDDOMAIN_H_ */
