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#include "gfCLevelSequencerComponent.h"

#include <fsCore/fsIResourceNamePathAdjuster.h>
#include <fsCore/fsIFile.h>
#include <fsCore/src/fsNCoreUtils.h>
#include <fsCore/src/debug/fsAssert.h>

#include "../../src/gfCHogCoreMain.h"
#include "map/gfCLevelSequencerMapComponent.h"
#include "gfCLevelSequencerLevelComponent.h"


const fsCUniqueId gfCLevelSequencerComponent::mTypeId("fsCLevelSequencerBaseComponent");


gfCLevelSequencerLevelComponent* gfCLevelSequencerComponent::levelFind(const fsStr& pLevelName)
{
	for (auto curr = mLevels.begin(); curr != mLevels.end(); ++curr)
	{
		if ((*curr)->levelFilenameGet() == pLevelName)
		{<--- Consider using std::find_if algorithm instead of a raw loop.
			return (*curr);
		}
	}
	return nullptr;
}

void gfCLevelSequencerComponent::levelsOrder()
{
	std::vector<gfCLevelSequencerLevelComponent*> orderedScenes;
	fsStr nextScene = gfCHogCoreMain::instanceGet()->firstLocationGet();

	while (!nextScene.emptyGet() && !gfCLevelSequencerMapComponent::lastLevel(nextScene))
	{
		if (gfCLevelSequencerLevelComponent* lev = levelFind(nextScene))
		{
			auto visitedLev = std::find_if(orderedScenes.begin(), orderedScenes.end(),
			                               [&nextScene](gfCLevelSequencerLevelComponent* const level)
			                               {
				                               return (level->levelNameGet() == nextScene);
			                               });

			if (visitedLev != orderedScenes.end())
			{
				fsAssert(false, "Looping around to %s again!", nextScene.utf8Get());
				break;
			}

			orderedScenes.push_back(lev);
			nextScene = lev->nextLevelGet();
		}
		else
		{
			fsAssert(0, "Missing level!");
			break;
		}
	}

	if (gfCLevelSequencerLevelComponent* lev = levelFind("map"))
	{
		orderedScenes.push_back(lev);
	}

	if (gfCLevelSequencerLevelComponent* lev = levelFind(gfCLevelSequencerMapComponent::levelListNameGet()))
	{
		orderedScenes.push_back(lev);
	}

	fsAssert(sanityCheck(orderedScenes, true), "Lost levels when ordering them, so they wont be visited!");

	mLevels = orderedScenes;
}

fsBool gfCLevelSequencerComponent::sanityCheck(std::vector<gfCLevelSequencerLevelComponent*> pSortedLevels,
                                               fsBool pClearUpLostLevels)
{
	std::vector<gfCLevelSequencerLevelComponent*> lost;
	for (gfCLevelSequencerLevelComponent* lev : mLevels)
	{
		if (std::find(pSortedLevels.begin(), pSortedLevels.end(), lev) == pSortedLevels.end())
		{
			if (!gfCLevelSequencerMapComponent::lastLevel(lev->levelNameGet()))
			{
				lost.push_back(lev);
				fsLogMsg("lost level : %s\n", lev->levelNameGet().utf8Get());
			}
		}
	}

	const fsBool noneLost = lost.empty();
	if (pClearUpLostLevels && !noneLost)
	{
		fsStr lostLevels;
		std::for_each(lost.begin(), lost.end(),
		              [&lostLevels](gfCLevelSequencerLevelComponent* lev)
		              {
			              lostLevels += lev->levelNameGet() + ", ";
		              });
		fsAssert(0, "Lost levels: %s", lostLevels.utf8Get());
		fsNCoreUtils::clearSequenceContainerOfPtrs(lost);
	}
	return noneLost;
}

gfCLevelSequencerLevelComponent* const gfCLevelSequencerComponent::levelSequencerLevelCreate(
	const fsStr& pPath, const fsStr& pName)
{
	return new gfCLevelSequencerLevelComponent(pPath, pName);
}

void gfCLevelSequencerComponent::levelsLoad(const fsFileList& pLevelList)
{
	for (fsCFileListEntry scene : pLevelList)
	{
		mLevels.push_back(levelSequencerLevelCreate(scene.pathGet(), scene.nameGet()));<--- Consider using std::transform algorithm instead of a raw loop.
	}
}

fsBool gfCLevelSequencerComponent::levelCriteriaMet(const fsCFileListEntry& pFileListEntry) const
{
	if (!pFileListEntry.isFolderGet())
	{
		return false;
	}

	return fsIFile::fileExistsGet(fsCResourceName(gfCLevelSequencerLevelComponent::levelFilenameCompose(
		                                              pFileListEntry.pathGet(), pFileListEntry.nameGet()),
	                                              fsCResourceName::eRES_LOCATION_ASSETS));
}

fsCFileListEntry gfCLevelSequencerComponent::fileListEntryCreate(fsStr const& pFullPathFilename)<--- The member function 'gfCLevelSequencerComponent::fileListEntryCreate' can be static.
{
	auto currentLevel = pFullPathFilename;

	auto path = currentLevel;
	path.erase(path.rfind(fsIResourceNamePathAdjuster::mPathSeparator));
	currentLevel.erase(0, currentLevel.rfind(fsIResourceNamePathAdjuster::mPathSeparator) + 1);

	fsCFileListEntry candidate(path, currentLevel, true);

	return candidate;
}

fsFileList gfCLevelSequencerComponent::levelFolderListGet(const fsStr pRootFolder)
{
	fsFileList sceneList;
	if (fsILevelBasedAppCoreMain::instanceGet() && fsILevelBasedAppCoreMain::instanceGet()->levelCountGet())
	{
		fsCFileListEntry candidate = fileListEntryCreate(fsILevelBasedAppCoreMain::instanceGet()->firstLocationGet());
		
		while (!gfCLevelSequencerMapComponent::lastLevel(candidate.nameGet()))
		{
			if (levelCriteriaMet(candidate))
			{
				sceneList.emplace_back(candidate);
			}
			auto nextLev = fsILevelBasedAppCoreMain::instanceGet()->nextLocationGet(
				gfCLevelSequencerLevelComponent::levelFilenameCompose(
				candidate.pathGet(), candidate.nameGet()));
			candidate = fileListEntryCreate(nextLev);
		}
	}
	return sceneList;
}

gfCLevelSequencerComponent::gfCLevelSequencerComponent()
{
}

gfCLevelSequencerComponent::~gfCLevelSequencerComponent()
{
	fsNCoreUtils::clearSequenceContainerOfPtrs(mLevels);
}