/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2012-2016 Symless Ltd.
 * Copyright (C) 2004 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file LICENSE that should have accompanied this file.
 * 
 * This package 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 "arch/unix/ArchSystemUnix.h"

#include <sys/utsname.h>
#ifndef __APPLE__
#include <QtDBus>
#endif

//
// ArchSystemUnix
//

ArchSystemUnix::ArchSystemUnix()
{
    // do nothing
}

ArchSystemUnix::~ArchSystemUnix()
{
    // do nothing
}

std::string
ArchSystemUnix::getOSName() const
{
#if defined(HAVE_SYS_UTSNAME_H)
    struct utsname info;
    if (uname(&info) == 0) {
        std::string msg;
        msg += info.sysname;
        msg += " ";
        msg += info.release;
        return msg;
    }
#endif
    return "Unix";
}

std::string
ArchSystemUnix::getPlatformName() const
{
#if defined(HAVE_SYS_UTSNAME_H)
    struct utsname info;
    if (uname(&info) == 0) {
        return std::string(info.machine);
    }
#endif
    return "unknown";
}

std::string
ArchSystemUnix::setting(const std::string&) const
{
    return "";
}

void
ArchSystemUnix::setting(const std::string&, const std::string&) const
{
}

std::string
ArchSystemUnix::getLibsUsed(void) const
{
    return "not implemented.\nuse lsof on shell";
}

#ifndef __APPLE__
bool
ArchSystemUnix::DBusInhibitScreenCall(InhibitScreenServices serviceID, bool state, std::string& error)
{
    error = "";
    static const std::array<QString, 2> services =
    {
        "org.freedesktop.ScreenSaver",
        "org.gnome.SessionManager"
    };
    static const std::array<QString, 2> paths =
    {
        "/org/freedesktop/ScreenSaver",
        "/org/gnome/SessionManager"
    };
    static std::array<uint, 2> cookies;

    auto serviceNum = static_cast<uint8_t>(serviceID);

    QDBusConnection bus = QDBusConnection::sessionBus();
    if (!bus.isConnected())
    {
        error = "bus failed to connect";
        return false;
    }

    QDBusInterface screenSaverInterface(
                services[serviceNum],
                paths[serviceNum],
                services[serviceNum],
                bus);

    if (!screenSaverInterface.isValid())
    {
        error = "screen saver interface failed to initialize";
        return false;
    }

    QDBusReply<uint> reply;
    if(state)
    {
        if (cookies[serviceNum])
        {
            error = "coockies are not empty";
            return false;
        }

        reply = screenSaverInterface.call("Inhibit", "Synergy", "Sleep is manually prevented by the Synergy preferences");
        if (reply.isValid())
            cookies[serviceNum] = reply.value();
    }
    else
    {
        if(!cookies[serviceNum])
        {
            error = "coockies are empty";
            return false;
        }
        reply  = screenSaverInterface.call("UnInhibit", cookies[serviceNum]);
        cookies[serviceNum] = 0;
    }

    if(!reply.isValid())
    {
        QDBusError qerror = reply.error();
        error = qerror.name().toStdString() + " : " + qerror.message().toStdString();
        return false;
    }

    return true;
}
#endif
