/****************************************************************************
**
** Copyright (C) 2019 Luxoft Sweden AB
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Application Manager.
**
** $QT_BEGIN_LICENSE:LGPL-QTAS$
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** Licensees holding valid commercial Qt Automotive Suite licenses may use
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** contained in a written agreement between you and The Qt Company.  For
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** 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
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** SPDX-License-Identifier: LGPL-3.0
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****************************************************************************/

#pragma once

#include <QAtomicInteger>
#include <QElapsedTimer>
#include <QObject>

#include <QtAppManCommon/global.h>

#if defined(Q_OS_LINUX)
#  include <QScopedPointer>
#  include <QtAppManMonitor/sysfsreader.h>
#endif

QT_BEGIN_NAMESPACE_AM

class ProcessReader : public QObject {
    Q_OBJECT
public slots:
    void update();
    void setProcessId(qint64 pid);

signals:
    void updated();

public:
    QAtomicInteger<quint32> cpuLoad;

    QAtomicInteger<quint32> totalVm;
    QAtomicInteger<quint32> totalRss;
    QAtomicInteger<quint32> totalPss;
    QAtomicInteger<quint32> textVm;
    QAtomicInteger<quint32> textRss;
    QAtomicInteger<quint32> textPss;
    QAtomicInteger<quint32> heapVm;
    QAtomicInteger<quint32> heapRss;
    QAtomicInteger<quint32> heapPss;

#if defined(Q_OS_LINUX)
    // it's public solely for testing purposes
    bool readSmaps(const QByteArray &smapsFile);
#endif

private:
    void openCpuLoad();
    qreal readCpuLoad();
    bool readMemory();

#if defined(Q_OS_LINUX)
    QScopedPointer<SysFsReader> m_statReader;
#endif
    QElapsedTimer m_elapsedTime;
    quint64 m_lastCpuUsage = 0.0;

    qint64 m_pid = 0;
};

QT_END_NAMESPACE_AM