/*************************************************************************
 *  Copyright (C) 2008,2009 by Volker Lanz <vl@fidra.de>                 *
 *  Copyright (C) 2016 by Andrius Štikonas <andrius@stikonas.eu>         *
 *                                                                       *
 *  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 "fs/linuxswap.h"

#include "util/externalcommand.h"

#include <KLocalizedString>

namespace FS
{
FileSystem::CommandSupportType linuxswap::m_Create = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_Grow = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_Shrink = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_Move = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_Copy = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_GetLabel = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_SetLabel = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_GetUUID = FileSystem::cmdSupportNone;
FileSystem::CommandSupportType linuxswap::m_UpdateUUID = FileSystem::cmdSupportNone;

linuxswap::linuxswap(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label) :
    FileSystem(firstsector, lastsector, sectorsused, label, FileSystem::LinuxSwap)
{
}

void linuxswap::init()
{
    m_SetLabel = m_Shrink = m_Grow = m_Create = m_UpdateUUID = (findExternal(QStringLiteral("mkswap"))) ? cmdSupportFileSystem : cmdSupportNone;
    m_GetLabel = cmdSupportCore;
    m_Copy = cmdSupportFileSystem;
    m_Move = cmdSupportCore;
    m_GetUUID = cmdSupportCore;
}

bool linuxswap::supportToolFound() const
{
    return
//          m_GetUsed != cmdSupportNone &&
        m_GetLabel != cmdSupportNone &&
        m_SetLabel != cmdSupportNone &&
        m_Create != cmdSupportNone &&
//          m_Check != cmdSupportNone &&
        m_UpdateUUID != cmdSupportNone &&
        m_Grow != cmdSupportNone &&
        m_Shrink != cmdSupportNone &&
        m_Copy != cmdSupportNone &&
        m_Move != cmdSupportNone &&
//          m_Backup != cmdSupportNone &&
        m_GetUUID != cmdSupportNone;
}

FileSystem::SupportTool linuxswap::supportToolName() const
{
    return SupportTool(QStringLiteral("util-linux"), QUrl(QStringLiteral("http://www.kernel.org/pub/linux/utils/util-linux-ng/")));
}

qint64 linuxswap::maxLabelLength() const
{
    return 15;
}

bool linuxswap::create(Report& report, const QString& deviceNode) const
{
    ExternalCommand cmd(report, QStringLiteral("mkswap"), { deviceNode });
    return cmd.run(-1) && cmd.exitCode() == 0;
}

bool linuxswap::resize(Report& report, const QString& deviceNode, qint64 length) const
{
    Q_UNUSED(length);
    const QString label = readLabel(deviceNode);
    const QString uuid = readUUID(deviceNode);

    QStringList args;
    if (!label.isEmpty())
        args << QStringLiteral("--label") << label;
    if (!uuid.isEmpty())
        args << QStringLiteral("--uuid") << uuid;

    args << deviceNode;

    ExternalCommand cmd(report, QStringLiteral("mkswap"), args);
    return cmd.run(-1) && cmd.exitCode() == 0;
}

bool linuxswap::copy(Report& report, const QString& targetDeviceNode, const QString& sourceDeviceNode) const
{
    const QString label = readLabel(sourceDeviceNode);
    const QString uuid = readUUID(sourceDeviceNode);

    QStringList args;
    if (!label.isEmpty())
        args << QStringLiteral("--label") << label;
    if (!uuid.isEmpty())
        args << QStringLiteral("--uuid") << uuid;

    args << targetDeviceNode;

    ExternalCommand cmd(report, QStringLiteral("mkswap"), args);
    return cmd.run(-1) && cmd.exitCode() == 0;
}

bool linuxswap::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
{
    ExternalCommand cmd(report, QStringLiteral("mkswap"), { QStringLiteral("--label"), newLabel, deviceNode });
    return cmd.run(-1) && cmd.exitCode() == 0;
}

QString linuxswap::mountTitle() const
{
    return i18nc("@title:menu", "Activate swap");
}

QString linuxswap::unmountTitle() const
{
    return i18nc("@title:menu", "Deactivate swap");
}

bool linuxswap::mount(const QString& deviceNode, const QString& mountPoint)
{
    Q_UNUSED(mountPoint);
    ExternalCommand cmd(QStringLiteral("swapon"), { deviceNode });
    return cmd.run(-1) && cmd.exitCode() == 0;
}

bool linuxswap::unmount(Report& report, const QString& deviceNode)
{
    ExternalCommand cmd(report, QStringLiteral("swapoff"), { deviceNode });
    return cmd.run(-1) && cmd.exitCode() == 0;
}

bool linuxswap::updateUUID(Report& report, const QString& deviceNode) const
{
    const QString label = readLabel(deviceNode);

    QStringList args;
    if (!label.isEmpty())
        args << QStringLiteral("--label") << label;

    args << deviceNode;

    ExternalCommand cmd(report, QStringLiteral("mkswap"), args);
    return cmd.run(-1) && cmd.exitCode() == 0;
}
}