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/*
* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation.
*
* 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 Lesser General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "entityinstancefactory.h"
#include "entity.h"
#include "entityhelper.h"
#include <QMetaType>
#include <QDebug>
using namespace CuteEntityManager;

QHash<QByteArray, EntityInstanceFactory::Constructor>
EntityInstanceFactory::instance =
QHash<QByteArray, EntityInstanceFactory::Constructor>();

EntityInstanceFactory::EntityInstanceFactory() {
}

Entity *EntityInstanceFactory::createInstance(const char *className) {
QString s = QString(className);
if (!s.contains("*")) {
s.append("*");
}
auto ptr = EntityInstanceFactory::createInstance(QMetaType::type(
s.toUtf8().constData()));
if (!ptr) {
s.remove("*");
ptr = EntityInstanceFactory::createObject(s.toUtf8());
}
return ptr;
}

Entity *EntityInstanceFactory::createInstance(const QString &className) {
return EntityInstanceFactory::createInstance(className.toUtf8().constData());
}

Entity *EntityInstanceFactory::createInstance(int metaTypeId) {
Entity *e = nullptr;
if (metaTypeId != QMetaType::UnknownType) {
auto metaObject = QMetaType::metaObjectForType(metaTypeId);
if (metaObject) {
e = qobject_cast<Entity *>(metaObject->newInstance());
} else {
void *newObj = QMetaType::create(metaTypeId);
if (newObj) {
e = static_cast<Entity *>(newObj);
}
}
}
return e;
}

Entity *EntityInstanceFactory::createInstance(const char *className,
const QHash<QString, QVariant> &attributes) {
Entity *e = EntityInstanceFactory::createInstance(className);
e = EntityInstanceFactory::setAttributes(e, attributes);
return e;
}

Entity *EntityInstanceFactory::setAttributes(Entity *&e,
const QHash<QString, QVariant> &attributes,
QHash<QString, QMetaProperty> metaprops) {
if (e) {
auto iterator = attributes.constBegin();
while (iterator != attributes.constEnd()) {
if (metaprops.contains(iterator.key())) {
QMetaProperty prop = metaprops.value(iterator.key());
if (prop.isWritable()) {
if (prop.isEnumType()) {
prop.write(e, prop.enumerator().key(iterator.value().toInt()));
} else {
prop.write(e, iterator.value());
}
} else {
qWarning() << prop.name() << "on Entity" << EntityHelper::getClassname(
e) << "not writeable!";
}
}
++iterator;
}
}
return e;
}

Entity *EntityInstanceFactory::setAttributes(Entity *&e,
const QHash<QString, QVariant> &attributes) {
if (!attributes.isEmpty()) {
auto metaprops = EntityHelper::getMetaProperties(e);
return EntityInstanceFactory::setAttributes(e, attributes, metaprops);
} else {
return e;
}
}

const QString EntityInstanceFactory::extractEntityType(const QString &s) {
QString r = "";
const QString sptr = "QSharedPointer";
if (s.contains(sptr)) {
const int index = s.indexOf(sptr) + sptr.count() + 1;
r = s.mid(index, s.indexOf(">", index) - index);
} else {
r = s;
}
return r;
}

Entity *EntityInstanceFactory::newSuperClassInstance(const Entity *e) {
Entity *super = nullptr;
if (e) {
auto metaObject = e->metaObject()->superClass();
if (QString(metaObject->className()) != QString("CuteEntityManager::Entity")) {
super = EntityInstanceFactory::createInstance(metaObject->className());
}
}
return super;
}

Entity *EntityInstanceFactory::createInstance(const QMetaObject *object) {
auto o = object->newInstance();
if(o) {
return qobject_cast<Entity *>(o);
} else {
return EntityInstanceFactory::createInstance(object->className());
}
}

QList<QSharedPointer<Entity> > EntityInstanceFactory::castQVariantList(
QVariant &list) {
return *reinterpret_cast<QList<QSharedPointer<Entity>>*>(list.data());
}

QSharedPointer<Entity> EntityInstanceFactory::castQVariant(
QVariant &entity) {
return *reinterpret_cast<QSharedPointer<Entity>*>(entity.data());
}

QStringList EntityInstanceFactory::getRegisteredClasses() {
QStringList registered = QStringList();
for (auto i = EntityInstanceFactory::instance.constBegin();
i != EntityInstanceFactory::instance.constEnd(); ++i) {
registered.append(i.key());
}
return registered;
}
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