/****************************************************************************
**
** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QT3DCORE_QSYSTEMINFORMATIONSERVICE_P_P_H
#define QT3DCORE_QSYSTEMINFORMATIONSERVICE_P_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/QThreadStorage>
#include <QtCore/QElapsedTimer>
#include <QtCore/QFile>
#include <QtCore/QMutex>

#include <Qt3DCore/qt3dcore_global.h>
#include <Qt3DCore/private/qt3dcore_global_p.h>
#include <Qt3DCore/private/qabstractserviceprovider_p.h>
#include <Qt3DCore/private/qservicelocator_p.h>
#include <Qt3DCore/private/qsysteminformationservice_p.h>

QT_BEGIN_NAMESPACE

namespace Qt3DCore {

namespace Debug {
class AspectCommandDebugger;
} // Debug

union Q_3DCORE_PRIVATE_EXPORT JobId
{
    JobId() : id(0L) { }
    JobId(quint32 t, quint32 i) { typeAndInstance[0] = t; typeAndInstance[1] = i; }

    quint32 typeAndInstance[2];
    quint64 id;
};

class Q_3DCORE_PRIVATE_EXPORT QSystemInformationServicePrivate : public QAbstractServiceProviderPrivate
{
public:
    struct JobRunStats
    {
        JobRunStats() { jobId.id = 0; startTime = 0L; endTime = 0L; }

        qint64 startTime;
        qint64 endTime;
        JobId jobId; // QAspectJob subclasses should properly populate the jobId
        quint64 threadId;
    };

    QSystemInformationServicePrivate(QAspectEngine *aspectEngine, const QString &description);
    ~QSystemInformationServicePrivate();

    static QSystemInformationServicePrivate *get(QSystemInformationService *q);

    // Aspects + Job threads
    void addJobLogStatsEntry(JobRunStats &stats);

    // Submission thread
    void addSubmissionLogStatsEntry(JobRunStats &stats);

    void writeFrameJobLogStats();
    void updateTracing();

    QAspectEngine *m_aspectEngine;
    bool m_traceEnabled;
    bool m_graphicsTraceEnabled;

    QElapsedTimer m_jobsStatTimer;
    QThreadStorage<QVector<JobRunStats> *> m_jobStatsCached;

    QVector<QVector<JobRunStats> *> m_localStorages;
    QVector<JobRunStats> *m_submissionStorage;

    QMutex m_localStoragesMutex;

    QScopedPointer<QFile> m_traceFile;
    quint32 m_frameId;

    Debug::AspectCommandDebugger *m_commandDebugger;

    Q_DECLARE_PUBLIC(QSystemInformationService)
};

class Q_3DCORE_PRIVATE_EXPORT QTaskLogger {
public:
    enum Type {
        AspectJob,
        Submission
    };

    QTaskLogger(QSystemInformationService *service, const JobId &jobId, Type type);
    QTaskLogger(QSystemInformationService *service, const quint32 jobType, const quint32 instance, Type type = Submission);

    ~QTaskLogger();

    void end(qint64 t = 0L);
    qint64 restart();

private:
    QSystemInformationService *m_service;
    QSystemInformationServicePrivate::JobRunStats m_stats;
    Type m_type;
};

}

QT_END_NAMESPACE

#endif // QT3DCORE_QSYSTEMINFORMATIONSERVICE_P_P_H