/*
 * PlayerLocalState.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 "PlayerLocalState.h"

#include "../CCallback.h"
#include "../lib/CPathfinder.h"
#include "../lib/mapObjects/CGHeroInstance.h"
#include "CPlayerInterface.h"
#include "adventureMap/CAdventureMapInterface.h"

PlayerLocalState::PlayerLocalState()
	: owner(*LOCPLINT)
{
	// should never be called, method required for serializer methods template instantiations
	throw std::runtime_error("Can not create PlayerLocalState without interface!");
}

PlayerLocalState::PlayerLocalState(CPlayerInterface & owner)
	: owner(owner)
{
}

void PlayerLocalState::saveHeroPaths(std::map<const CGHeroInstance *, int3> & pathsMap)
{
	for(auto & p : paths)
	{
		if(p.second.nodes.size())
			pathsMap[p.first] = p.second.endPos();
		else
			logGlobal->debug("%s has assigned an empty path! Ignoring it...", p.first->getNameTranslated());
	}
}

void PlayerLocalState::loadHeroPaths(std::map<const CGHeroInstance *, int3> & pathsMap)
{
	if(owner.cb)
	{
		for(auto & p : pathsMap)
		{
			CGPath path;
			owner.cb->getPathsInfo(p.first)->getPath(path, p.second);
			paths[p.first] = path;
			logGlobal->trace("Restored path for hero %s leading to %s with %d nodes", p.first->nodeName(), p.second.toString(), path.nodes.size());
		}
	}
}

void PlayerLocalState::setPath(const CGHeroInstance * h, const CGPath & path)
{
	paths[h] = path;
}

const CGPath & PlayerLocalState::getPath(const CGHeroInstance * h) const
{
	assert(hasPath(h));
	return paths.at(h);
}

bool PlayerLocalState::hasPath(const CGHeroInstance * h) const
{
	return paths.count(h) > 0;
}

bool PlayerLocalState::setPath(const CGHeroInstance * h, const int3 & destination)
{
	CGPath path;
	if(!owner.cb->getPathsInfo(h)->getPath(path, destination))
		return false;

	setPath(h, path);
	return true;
}

void PlayerLocalState::removeLastNode(const CGHeroInstance * h)
{
	assert(hasPath(h));
	if(!hasPath(h))
		return;

	auto & path = paths[h];
	path.nodes.pop_back();
	if(path.nodes.size() < 2) //if it was the last one, remove entire path and path with only one tile is not a real path
		erasePath(h);
}

void PlayerLocalState::erasePath(const CGHeroInstance * h)
{
	paths.erase(h);
	adventureInt->onHeroChanged(h);
}

void PlayerLocalState::verifyPath(const CGHeroInstance * h)
{
	if(!hasPath(h))
		return;
	setPath(h, getPath(h).endPos());
}