/*
 *   Copyright 2009 Aaron Seigo <aseigo@kde.org>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as
 *   published by the Free Software Foundation; either version 2, 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 Library 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 "applet.h"
#include "scriptengine.h"

#include <QAction>

#include <kservice.h>
#include <kdeclarative/configpropertymap.h>
#include <kconfigloader.h>

#include <Plasma/Applet>
#include <Plasma/Containment>
#include <Plasma/Corona>

namespace WorkspaceScripting
{

class Applet::Private
{
public:
    Private()
        : configDirty(false),
          inWallpaperConfig(false)
    {
    }

    QPointer<ScriptEngine> engine = nullptr;
    KConfigGroup configGroup;
    QStringList configGroupPath;
    KConfigGroup globalConfigGroup;
    QStringList globalConfigGroupPath;
    bool configDirty : 1;
    bool inWallpaperConfig : 1;
};

Applet::Applet(ScriptEngine *parent)
    : QObject(parent),
      d(new Applet::Private)
{
    d->engine = parent;
}

Applet::~Applet()
{
    delete d;
}

void Applet::setCurrentConfigGroup(const QStringList &groupNames)
{
    Plasma::Applet *app = applet();
    if (!app) {
        d->configGroup = KConfigGroup();
        d->configGroupPath.clear();
        return;
    }

    d->configGroup = app->config();
    d->configGroupPath = groupNames;

    foreach (const QString &groupName, groupNames) {
        d->configGroup = KConfigGroup(&d->configGroup, groupName);
    }

    d->inWallpaperConfig = !groupNames.isEmpty() && groupNames.first() == QLatin1String("Wallpaper");
}

QStringList Applet::currentConfigGroup() const
{
    return d->configGroupPath;
}

QStringList Applet::configKeys() const
{
    if (d->configGroup.isValid()) {
        return d->configGroup.keyList();
    }

    return QStringList();
}

QStringList Applet::configGroups() const
{
    if (d->configGroup.isValid()) {
        return d->configGroup.groupList();
    }

    return QStringList();
}

QVariant Applet::readConfig(const QString &key, const QJSValue &def) const
{
    if (d->configGroup.isValid()) {
        return d->configGroup.readEntry(key, def.toVariant());
    } else {
        return QVariant();
    }
}

void Applet::writeConfig(const QString &key, const QJSValue &value)
{
    if (d->configGroup.isValid()) {
        if (d->inWallpaperConfig) {
            //hacky, but only way to make the wallpaper react immediately
            QObject *wallpaperGraphicsObject = applet()->property("wallpaperGraphicsObject").value<QObject *>();
            if (wallpaperGraphicsObject) {
                KDeclarative::ConfigPropertyMap *config = static_cast<KDeclarative::ConfigPropertyMap *>(wallpaperGraphicsObject->property("configuration").value<QObject *>());
                config->setProperty(key.toLatin1(), value.toVariant());
            }
        } else if (applet()->configScheme()) {
            //check if it can be written in the applets' configScheme
            KConfigSkeletonItem *item = applet()->configScheme()->findItemByName(key);
            if (item) {
                item->setProperty(value.toVariant());
                applet()->configScheme()->blockSignals(true);
                applet()->configScheme()->save();
                //why read? read will update KConfigSkeletonItem::mLoadedValue,
                //allowing a write operation to be performed next time
                applet()->configScheme()->read();
                applet()->configScheme()->blockSignals(false);
                emit applet()->configScheme()->configChanged();
            }
        }

        d->configGroup.writeEntry(key, value.toVariant());
        d->configDirty = true;
    }
}

void Applet::setCurrentGlobalConfigGroup(const QStringList &groupNames)
{
    Plasma::Applet *app = applet();
    if (!app) {
        d->globalConfigGroup = KConfigGroup();
        d->globalConfigGroupPath.clear();
        return;
    }

    d->globalConfigGroup = app->globalConfig();
    d->globalConfigGroupPath = groupNames;

    foreach (const QString &groupName, groupNames) {
        d->globalConfigGroup = KConfigGroup(&d->globalConfigGroup, groupName);
    }
}

QStringList Applet::currentGlobalConfigGroup() const
{
    return d->globalConfigGroupPath;
}

QStringList Applet::globalConfigKeys() const
{
    if (d->globalConfigGroup.isValid()) {
        return d->globalConfigGroup.keyList();
    }

    return QStringList();
}

QStringList Applet::globalConfigGroups() const
{
    if (d->globalConfigGroup.isValid()) {
        return d->globalConfigGroup.groupList();
    }

    return QStringList();
}

QVariant Applet::readGlobalConfig(const QString &key, const QJSValue &def) const
{
    if (d->globalConfigGroup.isValid()) {
        return d->globalConfigGroup.readEntry(key, def.toVariant());
    } else {
        return QVariant();
    }
}

void Applet::writeGlobalConfig(const QString &key, const QJSValue &value)
{
    if (d->globalConfigGroup.isValid()) {
        d->globalConfigGroup.writeEntry(key, value.toVariant());
        d->configDirty = true;
    }
}

void Applet::reloadConfigIfNeeded()
{
    if (d->configDirty) {
        reloadConfig();
    }
}

void Applet::reloadConfig()
{
    Plasma::Applet *app = applet();
    if (app) {
        KConfigGroup cg = app->config();

        if (!app->isContainment()) {
            app->restore(cg);
        }

        app->configChanged();

        if (app->containment() && app->containment()->corona()) {
            app->containment()->corona()->requestConfigSync();
        }

        d->configDirty = false;
    }
}

QString Applet::version() const
{
    Plasma::Applet *app = applet();
    if (!app) {
        return QString();
    }

    return app->pluginMetaData().version();
}

void Applet::setLocked(bool locked)
{
    Plasma::Applet *app = applet();
    if (!app) {
        return;
    }

    app->setImmutability(locked ? Plasma::Types::UserImmutable : Plasma::Types::Mutable);
    KConfigGroup cg = app->config();
    if (!app->isContainment()) {
        cg = cg.parent();
    }

    if (cg.isValid()) {
        cg.writeEntry("immutability", (int)app->immutability());
    }
}

bool Applet::locked() const
{
    Plasma::Applet *app = applet();
    if (!app) {
        return Plasma::Types::Mutable;
    }

    return app->immutability() != Plasma::Types::Mutable;
}

Plasma::Applet *Applet::applet() const
{
    return nullptr;
}

ScriptEngine *Applet::engine() const
{
    return d->engine;
}

}