/*
* RecruitHero.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "Goals.h"
#include "../AIGateway.h"
#include "../AIUtility.h"
#include "../../../lib/constants/StringConstants.h"


namespace NKAI
{

using namespace Goals;

std::string RecruitHero::toString() const
{
	if(heroToBuy)
		return "Recruit " + heroToBuy->getNameTranslated() + " at " + town->getNameTranslated();
	else
		return "Recruit hero at " + town->getNameTranslated();
}

void RecruitHero::accept(AIGateway * ai)
{
	auto t = town;

	if(!t)
	{
		throw cannotFulfillGoalException("No town to recruit hero!");
	}

	logAi->debug("Trying to recruit a hero in %s at %s", t->getNameTranslated(), t->visitablePos().toString());

	auto heroes = cb->getAvailableHeroes(t);

	if(!heroes.size())
	{
		throw cannotFulfillGoalException("No available heroes in tavern in " + t->nodeName());
	}

	auto heroToHire = heroToBuy;

	if(!heroToHire)
	{
		for(auto hero : heroes)
		{
			if(!heroToHire || hero->getTotalStrength() > heroToHire->getTotalStrength())
				heroToHire = hero;
		}
	}

	if(!heroToHire)
		throw cannotFulfillGoalException("No hero to hire!");

	if(t->visitingHero)
	{
		cb->swapGarrisonHero(t);
	}

	if(t->visitingHero)
		throw cannotFulfillGoalException("Town " + t->nodeName() + " is occupied. Cannot recruit hero!");

	cb->recruitHero(t, heroToHire);

	{
		std::unique_lock lockGuard(ai->nullkiller->aiStateMutex);

		ai->nullkiller->heroManager->update();
		ai->nullkiller->objectClusterizer->reset();
	}

	if(t->visitingHero)
		ai->moveHeroToTile(t->visitablePos(), t->visitingHero.get());
}

}