/*
 * CQuery.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 "QueriesProcessor.h"

#include "CQuery.h"

void QueriesProcessor::popQuery(PlayerColor player, QueryPtr query)
{
	LOG_TRACE_PARAMS(logGlobal, "player='%s', query='%s'", player % query);
	if(topQuery(player) != query)
	{
		logGlobal->trace("Cannot remove, not a top!");
		return;
	}

	queries[player] -= query;
	auto nextQuery = topQuery(player);

	query->onRemoval(player);

	//Exposure on query below happens only if removal didn't trigger any new query
	if(nextQuery && nextQuery == topQuery(player))
		nextQuery->onExposure(query);
}

void QueriesProcessor::popQuery(const CQuery &query)
{
	LOG_TRACE_PARAMS(logGlobal, "query='%s'", query);

	assert(query.players.size());
	for(auto player : query.players)
	{
		auto top = topQuery(player);
		if(top.get() == &query)
			popQuery(top);
		else
		{
			logGlobal->trace("Cannot remove query %s", query.toString());
			logGlobal->trace("Queries found:");
			for(auto q : queries[player])
			{
				logGlobal->trace(q->toString());
			}
		}
	}
}

void QueriesProcessor::popQuery(QueryPtr query)
{
	for(auto player : query->players)
		popQuery(player, query);
}

void QueriesProcessor::addQuery(QueryPtr query)
{
	for(auto player : query->players)
		addQuery(player, query);

	for(auto player : query->players)
		query->onAdded(player);
}

void QueriesProcessor::addQuery(PlayerColor player, QueryPtr query)
{
	LOG_TRACE_PARAMS(logGlobal, "player='%d', query='%s'", player.getNum() % query);
	query->onAdding(player);
	queries[player].push_back(query);
}

QueryPtr QueriesProcessor::topQuery(PlayerColor player)
{
	return vstd::backOrNull(queries[player]);
}

void QueriesProcessor::popIfTop(QueryPtr query)
{
	LOG_TRACE_PARAMS(logGlobal, "query='%d'", query);
	if(!query)
		logGlobal->error("The query is nullptr! Ignoring.");

	popIfTop(*query);
}

void QueriesProcessor::popIfTop(const CQuery & query)
{
	for(PlayerColor color : query.players)
		if(topQuery(color).get() == &query)
			popQuery(color, topQuery(color));
}

std::vector<std::shared_ptr<const CQuery>> QueriesProcessor::allQueries() const
{
	std::vector<std::shared_ptr<const CQuery>> ret;
	for(auto & playerQueries : queries)
		for(auto & query : playerQueries.second)
			ret.push_back(query);

	return ret;
}

std::vector<QueryPtr> QueriesProcessor::allQueries()
{
	//TODO code duplication with const function :(
	std::vector<QueryPtr> ret;
	for(auto & playerQueries : queries)
		for(auto & query : playerQueries.second)
			ret.push_back(query);

	return ret;
}

QueryPtr QueriesProcessor::getQuery(QueryID queryID)
{
	for(auto & playerQueries : queries)
		for(auto & query : playerQueries.second)
			if(query->queryID == queryID)
				return query;
	return nullptr;
}