ReturnValue Combat::canDoCombat(const Creature* attacker, const Creature* target, bool isAggressive)
{
	if(!attacker)
		return RET_NOERROR;

	bool success = true;
	CreatureEventList combatEvents = const_cast<Creature*>(attacker)->getCreatureEvents(CREATURE_EVENT_COMBAT);
	for(CreatureEventList::iterator it = combatEvents.begin(); it != combatEvents.end(); ++it)
	{
		if(!(*it)->executeCombat(const_cast<Creature*>(attacker), const_cast<Creature*>(target), isAggressive) && success)
			success = false;
	}

	if(!success)
		return RET_NOTPOSSIBLE;

	if(g_config.getBool(ConfigManager::MONSTER_ATTACK_MONSTER))
	{
		if(target->getType() == CREATURETYPE_MONSTER && attacker->getType() == CREATURETYPE_MONSTER && !target->isPlayerSummon() && !attacker->isPlayerSummon())
			return RET_NOTPOSSIBLE;

		if(!attacker->isSummon() && !target->isSummon()) {
			if(attacker->getType() == CREATURETYPE_MONSTER && target->getType() == CREATURETYPE_MONSTER)
				return RET_NOTPOSSIBLE;
		}
	}

	if (attacker->isSummon())
	{
		if (target == attacker->getMaster())
		{
			return RET_NOTPOSSIBLE;
		}
	}