/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "mtropolis/element_factory.h"
#include "mtropolis/elements.h"
#include "mtropolis/runtime.h"

namespace MTropolis {

ElementLoaderContext::ElementLoaderContext(Runtime *pRuntime, Project *pProject, size_t pStreamIndex)
	: runtime(pRuntime), project(pProject), streamIndex(pStreamIndex) {
}

template<typename TElement, typename TElementData>
class ElementFactory {
public:
	static Common::SharedPtr<Element> createElement(ElementLoaderContext &context, const Data::DataObject &dataObject);
	static SIElementFactory *getInstance();

private:
	static SIElementFactory _instance;
};

template<typename TElement, typename TElementData>
Common::SharedPtr<Element> ElementFactory<TElement, TElementData>::createElement(ElementLoaderContext &context, const Data::DataObject &dataObject) {
	TElement *tElementPtr = new TElement();
	Common::SharedPtr<TElement> element(tElementPtr);
	Element *elementPtr = tElementPtr;

	if (!element->load(context, static_cast<const TElementData &>(dataObject))) {
		element.reset();
	} else {
		elementPtr->setSelfReference(element);
		if (elementPtr->getName().empty())
			elementPtr->tryAutoSetName(context.runtime, context.project);
	}

	return Common::SharedPtr<Element>(element);
}

template<typename TElement, typename TElementData>
SIElementFactory *ElementFactory<TElement, TElementData>::getInstance() {
	return &_instance;
}

template<typename TElement, typename TElementData>
SIElementFactory ElementFactory<TElement, TElementData>::_instance = {
	ElementFactory<TElement, TElementData>::createElement
};

SIElementFactory *getElementFactoryForDataObjectType(const Data::DataObjectTypes::DataObjectType dataObjectType) {
	switch (dataObjectType) {
	case Data::DataObjectTypes::kGraphicElement:
		return ElementFactory<GraphicElement, Data::GraphicElement>::getInstance();
	case Data::DataObjectTypes::kAVIMovieElement:
	case Data::DataObjectTypes::kMovieElement:
		return ElementFactory<MovieElement, Data::MovieElement>::getInstance();
	case Data::DataObjectTypes::kImageElement:
		return ElementFactory<ImageElement, Data::ImageElement>::getInstance();
	case Data::DataObjectTypes::kMToonElement:
		return ElementFactory<MToonElement, Data::MToonElement>::getInstance();
	case Data::DataObjectTypes::kTextLabelElement:
		return ElementFactory<TextLabelElement, Data::TextLabelElement>::getInstance();
	case Data::DataObjectTypes::kSoundElement:
		return ElementFactory<SoundElement, Data::SoundElement>::getInstance();

	default:
		return nullptr;
	}
}

} // End of namespace MTropolis