#include "BsResourceImporter.h"
#include "BsPath.h"
#include "BsFileSerializer.h"
#include "BsResource.h"

namespace BansheeEngine
{
	const WString ResourceImporter::DEFAULT_EXTENSION = L"asset";

	ResourceImporter::ResourceImporter()
		:SpecificImporter()
	{

	}

	ResourceImporter::~ResourceImporter()
	{

	}

	bool ResourceImporter::isExtensionSupported(const WString& ext) const
	{
		WString lowerCaseExt = ext;
		StringUtil::toLowerCase(lowerCaseExt);

		return lowerCaseExt == DEFAULT_EXTENSION;
	}

	bool ResourceImporter::isMagicNumberSupported(const UINT8* magicNumPtr, UINT32 numBytes) const
	{
		return true; // No magic number of asset files, they must always rely on extension
	}

	ResourcePtr ResourceImporter::import(const Path& filePath, ConstImportOptionsPtr importOptions)
	{
		FileSerializer fs;
		std::shared_ptr<IReflectable> loadedData = fs.decode(filePath);

		if (loadedData == nullptr)
			BS_EXCEPT(InternalErrorException, "Unable to import resource.");

		if (!loadedData->isDerivedFrom(Resource::getRTTIStatic()))
			BS_EXCEPT(InternalErrorException, "Imported object doesn't derive from Resource.");

		ResourcePtr resource = std::static_pointer_cast<Resource>(loadedData);

		return resource;
	}
}