/*
* CollectRes.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 "../VCAI.h"
#include "../AIUtility.h"
#include "../../../lib/mapping/CMap.h" //for victory conditions
#include "../../../lib/CPathfinder.h"
#include "../../../lib/StringConstants.h"


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

using namespace Goals;

bool CollectRes::operator==(const CollectRes & other) const
{
	return resID == other.resID;
}

//TGoalVec CollectRes::getAllPossibleSubgoals()
//{
//	TGoalVec ret;
//
	//auto givesResource = [this](const CGObjectInstance * obj) -> bool
	//{
	//	//TODO: move this logic to object side
	//	//TODO: remember mithril exists
	//	//TODO: water objects
	//	//TODO: Creature banks

	//	//return false first from once-visitable, before checking if they were even visited
	//	switch (obj->ID.num)
	//	{
	//	case Obj::TREASURE_CHEST:
	//		return resID == Res::GOLD;
	//		break;
	//	case Obj::RESOURCE:
	//		return obj->subID == resID;
	//		break;
	//	case Obj::MINE:
	//		return (obj->subID == resID &&
	//			(cb->getPlayerRelations(obj->tempOwner, ai->playerID) == PlayerRelations::ENEMIES)); //don't capture our mines
	//		break;
	//	case Obj::CAMPFIRE:
	//		return true; //contains all resources
	//		break;
	//	case Obj::WINDMILL:
	//		switch (resID)
	//		{
	//		case Res::GOLD:
	//		case Res::WOOD:
	//			return false;
	//		}
	//		break;
	//	case Obj::WATER_WHEEL:
	//		if (resID != Res::GOLD)
	//			return false;
	//		break;
	//	case Obj::MYSTICAL_GARDEN:
	//		if ((resID != Res::GOLD) && (resID != Res::GEMS))
	//			return false;
	//		break;
	//	case Obj::LEAN_TO:
	//	case Obj::WAGON:
	//		if (resID != Res::GOLD)
	//			return false;
	//		break;
	//	default:
	//		return false;
	//		break;
	//	}
	//	return !vstd::contains(ai->alreadyVisited, obj); //for weekly / once visitable
	//};

	//std::vector<const CGObjectInstance *> objs;
	//for (auto obj : ai->visitableObjs)
	//{
	//	if (givesResource(obj))
	//		objs.push_back(obj);
	//}
	//for (auto h : cb->getHeroesInfo())
	//{
	//	std::vector<const CGObjectInstance *> ourObjs(objs); //copy common objects

	//	for (auto obj : ai->reservedHeroesMap[h]) //add objects reserved by this hero
	//	{
	//		if (givesResource(obj))
	//			ourObjs.push_back(obj);
	//	}

	//	for (auto obj : ourObjs)
	//	{
	//		auto waysToGo = ai->ah->howToVisitObj(h, ObjectIdRef(obj));

	//		vstd::concatenate(ret, waysToGo);
	//	}
	//}
//	return ret;
//}

//TSubgoal CollectRes::whatToDoToAchieve()
//{
//	auto goals = getAllPossibleSubgoals();
//	auto trade = whatToDoToTrade();
//	if (!trade->invalid())
//		goals.push_back(trade);
//
//	return sptr(Invalid()); //we can always do that
//}

TSubgoal CollectRes::whatToDoToTrade()
{
	//std::vector<const IMarket *> markets;

	//std::vector<const CGObjectInstance *> visObjs;
	//ai->retrieveVisitableObjs(visObjs, true);
	//for (const CGObjectInstance * obj : visObjs)
	//{
	//	if (const IMarket * m = IMarket::castFrom(obj, false))
	//	{
	//		if (obj->ID == Obj::TOWN && obj->tempOwner == ai->playerID && m->allowsTrade(EMarketMode::RESOURCE_RESOURCE))
	//			markets.push_back(m);
	//		else if (obj->ID == Obj::TRADING_POST)
	//			markets.push_back(m);
	//	}
	//}

	//boost::sort(markets, [](const IMarket * m1, const IMarket * m2) -> bool
	//{
	//	return m1->getMarketEfficiency() < m2->getMarketEfficiency();
	//});

	//markets.erase(boost::remove_if(markets, [](const IMarket * market) -> bool
	//{
	//	if (!(market->o->ID == Obj::TOWN && market->o->tempOwner == ai->playerID))
	//	{
	//		if (!ai->isAccessible(market->o->visitablePos()))
	//			return true;
	//	}
	//	return false;
	//}), markets.end());

	//if (!markets.size())
	//{
	//	for (const CGTownInstance * t : cb->getTownsInfo())
	//	{
	//		if (cb->canBuildStructure(t, BuildingID::MARKETPLACE) == EBuildingState::ALLOWED)
	//			return sptr(BuildThis(BuildingID::MARKETPLACE, t).setpriority(2));
	//	}
	//}
	//else
	//{
	//	const IMarket * m = markets.back();
	//	//attempt trade at back (best prices)
	//	int howManyCanWeBuy = 0;
	//	for (Res::ERes i = Res::WOOD; i <= Res::GOLD; vstd::advance(i, 1))
	//	{
	//		if (i == resID)
	//			continue;
	//		int toGive = -1, toReceive = -1;
	//		m->getOffer(i, resID, toGive, toReceive, EMarketMode::RESOURCE_RESOURCE);
	//		assert(toGive > 0 && toReceive > 0);
	//		howManyCanWeBuy += toReceive * (ai->ah->freeResources()[i] / toGive);
	//	}

	//	if (howManyCanWeBuy >= value)
	//	{
	//		auto backObj = cb->getTopObj(m->o->visitablePos()); //it'll be a hero if we have one there; otherwise marketplace
	//		assert(backObj);
	//		auto objid = m->o->id.getNum();
	//		if (backObj->tempOwner != ai->playerID) //top object not owned
	//		{
	//			return sptr(VisitObj(objid)); //just go there
	//		}
	//		else //either it's our town, or we have hero there
	//		{
	//			return sptr(Trade(resID, value, objid).setisElementar(true)); //we can do this immediately
	//		}
	//	}
	//}
	return sptr(Invalid()); //cannot trade
}