//       _________ __                 __
//      /   _____//  |_____________ _/  |______     ____  __ __  ______
//      \_____  \\   __\_  __ \__  \\   __\__  \   / ___\|  |  \/  ___/
//      /        \|  |  |  | \// __ \|  |  / __ \_/ /_/  >  |  /\___ |
//     /_______  /|__|  |__|  (____  /__| (____  /\___  /|____//____  >
//             \/                  \/          \//_____/            \/
//  ______________________                           ______________________
//                        T H E   W A R   B E G I N S
//         Stratagus - A free fantasy real time strategy game engine
//
//      (c) Copyright 2012-2022 by Joris Dauphin and Andrettin
//
//      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; only version 2 of the License.
//
//      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., 59 Temple Place - Suite 330, Boston, MA
//      02111-1307, USA.

#pragma once

class CUnit;

namespace wyrmgus {

/**
**  Class to ease the ref counting of each CUnit instance.
*/
class unit_ref final
{
public:
	explicit unit_ref(CUnit *unit) : unit(unit)
	{
		if (unit == nullptr) {
			throw std::runtime_error("Tried to construct a unit ref from a null unit pointer.");
		}
	}

	~unit_ref();

	CUnit *get() const
	{
		return this->unit;
	}

	operator CUnit *()
	{
		return this->unit;
	}

	operator CUnit *() const
	{
		return this->unit;
	}

	CUnit &operator*()
	{
		return *this->unit;
	}

	CUnit *operator->() const
	{
		return this->unit;
	}

	bool operator==(const unit_ref &other) const
	{
		return this->unit == other.unit;
	}

	bool operator!=(const unit_ref &other) const
	{
		return this->unit != other.unit;
	}

	bool operator==(CUnit *u) const
	{
		return this->unit == u;
	}

	bool operator!=(CUnit *u) const
	{
		return this->unit != u;
	}

private:
	CUnit *unit = nullptr;
};

}
