/****************************************************************************
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** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
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** This file is part of the Qt3D module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
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** the packaging of this file. Please review the following information to
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****************************************************************************/

#include "qlogicaspect.h"
#include "qlogicaspect_p.h"
#include "executor_p.h"
#include "handler_p.h"
#include "manager_p.h"
#include "qlogiccomponent.h"

#include <Qt3DCore/qnodevisitor.h>
#include <Qt3DCore/qscenepropertychange.h>

#include <Qt3DCore/qnode.h>
#include <Qt3DCore/private/qchangearbiter_p.h>
#include <Qt3DCore/private/qscene_p.h>
#include <Qt3DCore/qaspectfactory.h>
#include <Qt3DCore/qservicelocator.h>

#include <QThread>
#include <QWindow>

QT_BEGIN_NAMESPACE

using namespace Qt3DCore;

namespace Qt3DLogic {

/*!
    \class Qt3DLogic::QLogicAspectPrivate
    \internal
*/
QLogicAspectPrivate::QLogicAspectPrivate()
    : QAbstractAspectPrivate()
    , m_time(0)
    , m_initialized(false)
    , m_manager(new Logic::Manager)
    , m_executor(new Logic::Executor)
    , m_callbackJob(new Logic::CallbackJob)
{
    m_aspectType = QAbstractAspect::AspectOther;
    m_callbackJob->setManager(m_manager.data());
    m_manager->setExecutor(m_executor.data());
}

QLogicAspect::QLogicAspect(QObject *parent)
    : QAbstractAspect(*new QLogicAspectPrivate(), parent)
{
    registerBackendTypes();
    d_func()->m_manager->setLogicAspect(this);
}

/*! \internal */
QLogicAspect::QLogicAspect(QLogicAspectPrivate &dd, QObject *parent)
    : QAbstractAspect(dd, parent)
{
    registerBackendTypes();
    d_func()->m_manager->setLogicAspect(this);
}

void QLogicAspect::registerBackendTypes()
{
    registerBackendType<QLogicComponent>(QBackendNodeFunctorPtr(new Logic::HandlerFunctor(d_func()->m_manager.data())));
}

QVector<QAspectJobPtr> QLogicAspect::jobsToExecute(qint64 time)
{
    Q_D(QLogicAspect);
    d->m_time = time;
    // TODO: Ensure arbiter and postman are setup prior to invoking QAspectManager::initialize()

    // Create jobs that will get exectued by the threadpool
    QVector<QAspectJobPtr> jobs;
    jobs.append(d->m_callbackJob);
    return jobs;
}

void QLogicAspect::sceneNodeAdded(Qt3DCore::QSceneChangePtr &e)
{
    QScenePropertyChangePtr propertyChange = e.staticCast<QScenePropertyChange>();
    QNodePtr nodePtr = propertyChange->value().value<QNodePtr>();
    QNode *n = nodePtr.data();
    QNodeVisitor visitor;
    visitor.traverse(n, this, &QLogicAspect::visitNode);
}

void QLogicAspect::sceneNodeRemoved(Qt3DCore::QSceneChangePtr &e)
{
    QScenePropertyChangePtr propertyChange = e.staticCast<QScenePropertyChange>();
    QNodePtr nodePtr = propertyChange->value().value<QNodePtr>();
    QNode *n = nodePtr.data();
    QAbstractAspect::clearBackendNode(n);
}

void QLogicAspect::setRootEntity(Qt3DCore::QEntity *rootObject)
{
    QNodeVisitor visitor;
    visitor.traverse(rootObject, this, &QLogicAspect::visitNode);
}

void QLogicAspect::onInitialize(const QVariantMap &data)
{
    Q_UNUSED(data);
}

void QLogicAspect::onCleanup()
{
}

void QLogicAspect::onStartup()
{
    Q_D(QLogicAspect);
    d->m_executor->setScene(d->m_arbiter->scene());
}

void QLogicAspect::onShutdown()
{
    Q_D(QLogicAspect);
    // Throw away any pending work that may deadlock during the shutdown procedure
    // when the main thread waits for any queued jobs to finish.
    d->m_executor->clearQueueAndProceed();
}

void QLogicAspect::visitNode(Qt3DCore::QNode *node)
{
    QAbstractAspect::createBackendNode(node);
}

} // namespace Qt3DLogic

QT_END_NAMESPACE

QT3D_REGISTER_NAMESPACED_ASPECT("logic", QT_PREPEND_NAMESPACE(Qt3DLogic), QLogicAspect)