/***************************************************************************
 *   Copyright 2008 by Dario Freddi <drf@kdemod.ath.cx>                    *
 *   Copyright 2008 by Sebastian Kügler <sebas@kde.org>                    *
 *                                                                         *
 *   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 2 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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
 ***************************************************************************/

#include "PowerDevilRunner.h"

// kde-workspace/libs
#include <sessionmanagement.h>

#include <QDBusInterface>
#include <QDBusReply>
#include <QDBusConnectionInterface>
#include <QIcon>
#include <QDebug>

#include <KSharedConfig>
#include <KLocalizedString>

K_EXPORT_PLASMA_RUNNER_WITH_JSON(PowerDevilRunner, "plasma-runner-powerdevil.json")

PowerDevilRunner::PowerDevilRunner(QObject *parent, const KPluginMetaData &metaData, const QVariantList &args)
    : Plasma::AbstractRunner(parent, metaData, args)
    , m_session(new SessionManagement(this))
{
    setObjectName(QStringLiteral("PowerDevil"));
    updateStatus();
    initUpdateTriggers();

    QStringList commands;
    commands << i18nc("Note this is a KRunner keyword", "suspend")
             << i18nc("Note this is a KRunner keyword", "sleep")
             << i18nc("Note this is a KRunner keyword", "hibernate")
             << i18nc("Note this is a KRunner keyword", "to disk")
             << i18nc("Note this is a KRunner keyword", "to ram")
             << i18nc("Note this is a KRunner keyword", "screen brightness")
             << i18nc("Note this is a KRunner keyword", "dim screen");
    setTriggerWords(commands);
}

void PowerDevilRunner::updateSyntaxes()
{
    QList<Plasma::RunnerSyntax> syntaxes;
    syntaxes.append(Plasma::RunnerSyntax(i18nc("Note this is a KRunner keyword", "suspend"),
                     i18n("Lists system suspend (e.g. sleep, hibernate) options "
                          "and allows them to be activated")));

    if (m_session->canSuspend()) {
        Plasma::RunnerSyntax sleepSyntax(i18nc("Note this is a KRunner keyword", "sleep"),
                                         i18n("Suspends the system to RAM"));
        sleepSyntax.addExampleQuery(i18nc("Note this is a KRunner keyword", "to ram"));
        syntaxes.append(sleepSyntax);
    }

    if (m_session->canHibernate()) {
        Plasma::RunnerSyntax hibernateSyntax(i18nc("Note this is a KRunner keyword", "hibernate"),
                                         i18n("Suspends the system to disk"));
        hibernateSyntax.addExampleQuery(i18nc("Note this is a KRunner keyword", "to disk"));
        syntaxes.append(hibernateSyntax);
    }

    Plasma::RunnerSyntax brightnessSyntax(i18nc("Note this is a KRunner keyword", "screen brightness"),
                            // xgettext:no-c-format
                            i18n("Lists screen brightness options or sets it to the brightness defined by :q:; "
                                 "e.g. screen brightness 50 would dim the screen to 50% maximum brightness"));
    brightnessSyntax.addExampleQuery(i18nc("Note this is a KRunner keyword", "dim screen"));
    syntaxes.append(brightnessSyntax);
    setSyntaxes(syntaxes);
}

PowerDevilRunner::~PowerDevilRunner()
{
}

void PowerDevilRunner::initUpdateTriggers()
{
    // Also receive updates triggered through the DBus
    QDBusConnection dbus = QDBusConnection::sessionBus();
    if (dbus.interface()->isServiceRegistered(QStringLiteral("org.kde.Solid.PowerManagement"))) {
        if (!dbus.connect(QStringLiteral("org.kde.Solid.PowerManagement"),
                          QStringLiteral("/org/kde/Solid/PowerManagement"),
                          QStringLiteral("org.kde.Solid.PowerManagement"),
                          QStringLiteral("configurationReloaded"), this, SLOT(updateStatus()))) {
            qDebug() << "error!";
        }
    }
}

void PowerDevilRunner::updateStatus()
{
    updateSyntaxes();
}

bool PowerDevilRunner::parseQuery(const QString& query, const QList<QRegExp>& rxList, QString& parameter) const
{
    for (const QRegExp& rx : rxList) {
        if (rx.exactMatch(query)) {
             parameter = rx.cap(1).trimmed();
             return true;
        }
    }
    return false;
}

enum SleepState {
    StandbyState = 1,
    SuspendState = 2,
    HibernateState = 4,
    HybridSuspendState = 8
};

void PowerDevilRunner::match(Plasma::RunnerContext &context)
{
    const QString term = context.query();
    QList<Plasma::QueryMatch> matches;

    QString parameter;

    if (parseQuery(term,
                          QList<QRegExp>() << QRegExp(i18nc("Note this is a KRunner keyword; %1 is a parameter", "screen brightness %1", QStringLiteral("(.*)")), Qt::CaseInsensitive)
                                           << QRegExp(i18nc("Note this is a KRunner keyword", "screen brightness"), Qt::CaseInsensitive)
                                           << QRegExp(i18nc("Note this is a KRunner keyword; %1 is a parameter", "dim screen %1", QStringLiteral("(.*)")), Qt::CaseInsensitive)
                                           << QRegExp(i18nc("Note this is a KRunner keyword", "dim screen"), Qt::CaseInsensitive),
                          parameter)) {
        if (!parameter.isEmpty()) {
            bool test;
            int b = parameter.toInt(&test);
            if (test) {
                int brightness = qBound(0, b, 100);
                Plasma::QueryMatch match(this);
                match.setType(Plasma::QueryMatch::ExactMatch);
                match.setIconName(QStringLiteral("preferences-system-power-management"));
                match.setText(i18n("Set Brightness to %1", brightness));
                match.setData(brightness);
                match.setRelevance(1);
                match.setId(QStringLiteral("BrightnessChange"));
                matches.append(match);
            }
        } else {
            Plasma::QueryMatch match1(this);
            match1.setType(Plasma::QueryMatch::ExactMatch);
            match1.setIconName(QStringLiteral("preferences-system-power-management"));
            match1.setText(i18n("Dim screen totally"));
            match1.setRelevance(1);
            match1.setId(QStringLiteral("DimTotal"));
            matches.append(match1);

            Plasma::QueryMatch match2(this);
            match2.setType(Plasma::QueryMatch::ExactMatch);
            match2.setIconName(QStringLiteral("preferences-system-power-management"));
            match2.setText(i18n("Dim screen by half"));
            match2.setRelevance(1);
            match2.setId(QStringLiteral("DimHalf"));
            matches.append(match2);
        }
    } else if (term.compare(i18nc("Note this is a KRunner keyword", "sleep"), Qt::CaseInsensitive) == 0) {
        if (m_session->canSuspend()) {
            addSuspendMatch(SuspendState, matches);
        }

        if (m_session->canHibernate()) {
            addSuspendMatch(HibernateState, matches);
        }
    } else if (term.compare(i18nc("Note this is a KRunner keyword", "suspend"), Qt::CaseInsensitive) == 0 ||
               term.compare(i18nc("Note this is a KRunner keyword", "to ram"), Qt::CaseInsensitive) == 0) {
        addSuspendMatch(SuspendState, matches);
    } else if (term.compare(i18nc("Note this is a KRunner keyword", "hibernate"), Qt::CaseInsensitive) == 0 ||
               term.compare(i18nc("Note this is a KRunner keyword", "to disk"), Qt::CaseInsensitive) == 0) {
        addSuspendMatch(HibernateState, matches);
    }

    context.addMatches(matches);
}

void PowerDevilRunner::addSuspendMatch(int value, QList<Plasma::QueryMatch> &matches)
{
    Plasma::QueryMatch match(this);
    match.setType(Plasma::QueryMatch::ExactMatch);

    switch ((SleepState)value) {
        case SuspendState:
        case StandbyState:
            match.setIconName(QStringLiteral("system-suspend"));
            match.setText(i18nc("Suspend to RAM", "Sleep"));
            match.setSubtext(i18n("Suspend to RAM"));
            match.setRelevance(1);
            break;
        case HibernateState:
            match.setIconName(QStringLiteral("system-suspend-hibernate"));
            match.setText(i18nc("Suspend to disk", "Hibernate"));
            match.setSubtext(i18n("Suspend to disk"));
            match.setRelevance(0.99);
            break;
    }

    match.setData(value);
    match.setId(QStringLiteral("Sleep"));
    matches.append(match);
}

void PowerDevilRunner::run(const Plasma::RunnerContext &context, const Plasma::QueryMatch &match)
{
    Q_UNUSED(context)

    QDBusInterface iface(QStringLiteral("org.kde.Solid.PowerManagement"),
                         QStringLiteral("/org/kde/Solid/PowerManagement"),
                         QStringLiteral("org.kde.Solid.PowerManagement"));
    QDBusInterface brightnessIface(QStringLiteral("org.kde.Solid.PowerManagement"),
                                   QStringLiteral("/org/kde/Solid/PowerManagement/Actions/BrightnessControl"),
                                   QStringLiteral("org.kde.Solid.PowerManagement.Actions.BrightnessControl"));
    if (match.id().startsWith(QLatin1String("PowerDevil_ProfileChange"))) {
        iface.asyncCall(QStringLiteral("loadProfile"), match.data().toString());
    } else if (match.id() == QLatin1String("PowerDevil_BrightnessChange")) {
        brightnessIface.asyncCall(QStringLiteral("setBrightness"), match.data().toInt());
    } else if (match.id() == QLatin1String("PowerDevil_DimTotal")) {
        brightnessIface.asyncCall(QStringLiteral("setBrightness"), 0);
    } else if (match.id() == QLatin1String("PowerDevil_DimHalf")) {
        QDBusReply<int> brightness = brightnessIface.asyncCall(QStringLiteral("brightness"));
        brightnessIface.asyncCall(QStringLiteral("setBrightness"), static_cast<int>(brightness / 2));
    } else if (match.id().startsWith(QLatin1String("PowerDevil_Sleep"))) {
        switch ((SleepState)match.data().toInt()) {
            case SuspendState:
            case StandbyState:
                m_session->suspend();
                break;
            case HibernateState:
                m_session->hibernate();
                break;
        }
    }
}

#include "PowerDevilRunner.moc"