/*
* RecruitHeroBehavior.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 "RecruitHeroBehavior.h"
#include "../AIGateway.h"
#include "../AIUtility.h"
#include "../Goals/RecruitHero.h"
#include "../Goals/ExecuteHeroChain.h"

namespace NKAI
{

extern boost::thread_specific_ptr<CCallback> cb;
extern boost::thread_specific_ptr<AIGateway> ai;

using namespace Goals;

std::string RecruitHeroBehavior::toString() const
{
	return "Recruit hero";
}

Goals::TGoalVec RecruitHeroBehavior::decompose() const
{
	Goals::TGoalVec tasks;
	auto towns = cb->getTownsInfo();

	auto ourHeroes = ai->nullkiller->heroManager->getHeroRoles();
	auto minScoreToHireMain = std::numeric_limits<float>::max();

	for(auto hero : ourHeroes)
	{
		if(hero.second != HeroRole::MAIN)
			continue;

		auto newScore = ai->nullkiller->heroManager->evaluateHero(hero.first.get());

		if(minScoreToHireMain > newScore)
		{
			// weakest main hero score
			minScoreToHireMain = newScore;
		}
	}

	for(auto town : towns)
	{
		if(ai->nullkiller->heroManager->canRecruitHero(town))
		{
			auto availableHeroes = cb->getAvailableHeroes(town);

			for(auto hero : availableHeroes)
			{
				auto score = ai->nullkiller->heroManager->evaluateHero(hero);

				if(score > minScoreToHireMain)
				{
					tasks.push_back(Goals::sptr(Goals::RecruitHero(town, hero).setpriority(200)));
					break;
				}
			}

			if(cb->getHeroesInfo().size() < cb->getTownsInfo().size() + 1
				|| (ai->nullkiller->getFreeResources()[EGameResID::GOLD] > 10000
					&& ai->nullkiller->buildAnalyzer->getGoldPreasure() < MAX_GOLD_PEASURE))
			{
				tasks.push_back(Goals::sptr(Goals::RecruitHero(town).setpriority(3)));
			}
		}
	}

	return tasks;
}

}
