/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2010 Rohan Prabhu <rohan@rohanprabhu.com>

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, see <http://www.gnu.org/licenses/>.
*********************************************************************/

#include "meta.h"

Q_DECLARE_METATYPE(SWrapper::Client*)
Q_DECLARE_METATYPE(SWrapper::ClientGroup*)

using namespace KWin::MetaScripting;

// Wrapper for KWin::Client* objects
QScriptValue Client::toScriptValue(QScriptEngine* eng, const KClientRef& client)
    {
    return SWrapper::Client::generate(client, eng);
    }

void Client::fromScriptValue(const QScriptValue& obj, KWin::Client*& client)
    {
    SWrapper::Client* wrapper = qscriptvalue_cast<SWrapper::Client*>(obj);

    if(wrapper == 0)
        {
        client = 0;
        }
    else
        {
        client = wrapper->getCentralObject();
        }
    }
// End of metas for KWin::Client* objects

// Meta for KWin::ClientGroup* objects
QScriptValue ClientGroup::toScriptValue(QScriptEngine* eng, const KClientGroupRef& cGrp)
    {
    return SWrapper::ClientGroup::generate(eng, new SWrapper::ClientGroup(cGrp));
    }

void ClientGroup::fromScriptValue(const QScriptValue& obj, KWin::ClientGroup*& cGrp)
    {
    SWrapper::ClientGroup* wrapper = qscriptvalue_cast<SWrapper::ClientGroup*>(obj);

    if(wrapper == 0)
        {
        cGrp = 0;
        }
    else
        {
        cGrp = wrapper->getCentralObject();
        }
    }
// End of metas for KWin::ClientGroup* objects

// Wrapper for KWin::Toplevel* objects [ONE DIRTY HACK]
QScriptValue Toplevel::toScriptValue(QScriptEngine* eng, const KToplevelRef& tlevel)
    {
    Q_UNUSED(eng)
    Q_UNUSED(tlevel)
    return QScriptValue();
    }

void Toplevel::fromScriptValue(const QScriptValue& obj, KWin::Toplevel*& tlevel)
    {
    SWrapper::Client* wrapper = qscriptvalue_cast<SWrapper::Client*>(obj);
    if(wrapper == 0)
        {
        tlevel = 0;
        }
    else
        {
        tlevel = static_cast<KWin::Client*>(wrapper->getCentralObject());
        }
    }
// End of wrapper for KWin::Toplevel* object

// Meta for QPoint object
QScriptValue Point::toScriptValue(QScriptEngine* eng, const QPoint& point)
    {
    QScriptValue temp = eng->newObject();
    temp.setProperty("x", point.x());
    temp.setProperty("y", point.y());
    return temp;
    }

void Point::fromScriptValue(const QScriptValue& obj, QPoint& point)
    {
    QScriptValue x = obj.property("x", QScriptValue::ResolveLocal);
    QScriptValue y = obj.property("y", QScriptValue::ResolveLocal);

    if(!x.isUndefined() && !y.isUndefined())
        {
        point.setX(x.toInt32());
        point.setY(y.toInt32());
        }
    }
// End of meta for QPoint object

// Meta for QSize object
QScriptValue Size::toScriptValue(QScriptEngine* eng, const QSize& size)
    {
    QScriptValue temp = eng->newObject();
    temp.setProperty("w", size.width());
    temp.setProperty("h", size.height());
    return temp;
    }

void Size::fromScriptValue(const QScriptValue& obj, QSize& size)
    {
    QScriptValue w = obj.property("w", QScriptValue::ResolveLocal);
    QScriptValue h = obj.property("h", QScriptValue::ResolveLocal);

    if(!w.isUndefined() && !h.isUndefined())
        {
        size.setWidth(w.toInt32());
        size.setHeight(h.toInt32());
        }
    }
// End of meta for QSize object

// Meta for QRect object. Just a temporary measure, hope to
// add a much better wrapping of the QRect object soon
QScriptValue Rect::toScriptValue(QScriptEngine* eng, const QRect& rect)
    {
    QScriptValue temp = eng->newObject();
    temp.setProperty("x", rect.x());
    temp.setProperty("y", rect.y());
    temp.setProperty("width", rect.width());
    temp.setProperty("height", rect.height());

    return temp;
    }

void Rect::fromScriptValue(const QScriptValue& obj, QRect &rect)
    {
    QScriptValue w = obj.property("w", QScriptValue::ResolveLocal);
    QScriptValue h = obj.property("h", QScriptValue::ResolveLocal);
    QScriptValue x = obj.property("x", QScriptValue::ResolveLocal);
    QScriptValue y = obj.property("y", QScriptValue::ResolveLocal);

    if(!w.isUndefined() && !h.isUndefined() && !x.isUndefined() && !y.isUndefined())
        {
        rect.setX(x.toInt32());
        rect.setY(y.toInt32());
        rect.setWidth(w.toInt32());
        rect.setHeight(h.toInt32());
        }
    }
// End of meta for QRect object

// Other helper functions
void KWin::MetaScripting::registration(QScriptEngine* eng)
    {
    qScriptRegisterMetaType<KClientRef>(eng, Client::toScriptValue, Client::fromScriptValue);
    qScriptRegisterMetaType<QPoint>(eng, Point::toScriptValue, Point::fromScriptValue);
    qScriptRegisterMetaType<QSize>(eng, Size::toScriptValue, Size::fromScriptValue);
    qScriptRegisterMetaType<QRect>(eng, Rect::toScriptValue, Rect::fromScriptValue);
    qScriptRegisterMetaType<KToplevelRef>(eng, Toplevel::toScriptValue, Toplevel::fromScriptValue);
    qScriptRegisterMetaType<KClientGroupRef>(eng, ClientGroup::toScriptValue, ClientGroup::fromScriptValue);

    qScriptRegisterSequenceMetaType<QStringList>(eng);
    qScriptRegisterSequenceMetaType< QList<KWin::ClientGroup*> >(eng);
    qScriptRegisterSequenceMetaType<KClientList>(eng);
    }

QScriptValue KWin::MetaScripting::configExists(QScriptContext* ctx, QScriptEngine* eng)
    {
    QHash<QString, QVariant> scriptConfig = (((ctx->thisObject()).data()).toVariant()).toHash();
    QVariant val = scriptConfig.value((ctx->argument(0)).toString(), QVariant());

    return eng->toScriptValue<bool>(val.isValid());
    }

QScriptValue KWin::MetaScripting::getConfigValue(QScriptContext* ctx, QScriptEngine* eng)
    {
    int num = ctx->argumentCount();
    QHash<QString, QVariant> scriptConfig = (((ctx->thisObject()).data()).toVariant()).toHash();

    /*
     * Handle config.get() separately. Compute and return immediately.
     **/
    if(num == 0)
        {
        QHash<QString, QVariant>::const_iterator i;
        QScriptValue ret = eng->newArray();

        for(i = scriptConfig.constBegin(); i != scriptConfig.constEnd(); ++i)
            {
            ret.setProperty(i.key(), eng->newVariant(i.value()));
            }

        return ret;
        }

    if((num == 1) && !((ctx->argument(0)).isArray()))
        {
        QVariant val = scriptConfig.value((ctx->argument(0)).toString(), QVariant());

        if(val.isValid())
            {
            return eng->newVariant(val);
            }
        else
            {
            return QScriptValue();
            }
        }
    else
        {
        QScriptValue ret = eng->newArray();
        int j = 0;

        if((ctx->argument(0)).isArray())
            {
            bool simple = (num == 1)?0:(ctx->argument(1)).toBool();
            QScriptValue array = (ctx->argument(0));
            int len = (array.property("length").isValid())?array.property("length").toNumber():0;

            for(int i=0; i<len; i++)
                {
                QVariant val = scriptConfig.value(array.property(i).toString(), QVariant());

                if(val.isValid())
                    {
                    if(simple)
                        {
                        ret.setProperty(j, eng->newVariant(val));
                        }
                    else
                        {
                        ret.setProperty(array.property(i).toString(), eng->newVariant(val));
                        }

                    j++;
                    }
                }
            }
        else
            {
            for(int i=0; i<num; i++)
                {
                QVariant val = scriptConfig.value((ctx->argument(i)).toString(), QVariant());

                if(val.isValid())
                    {
                    ret.setProperty((ctx->argument(i)).toString(), eng->newVariant(val));
                    j = 1;
                    }
                }
            }


        if(j == 0)
            {
            return QScriptValue();
            }
        else
            {
            return ret;
            }
        }
    }

void KWin::MetaScripting::supplyConfig(QScriptEngine* eng, const QVariant& scriptConfig)
    {
    QScriptValue configObject = eng->newObject();
    configObject.setData(eng->newVariant(scriptConfig));
    configObject.setProperty("get", eng->newFunction(getConfigValue, 0), QScriptValue::Undeletable);
    configObject.setProperty("exists", eng->newFunction(configExists, 0), QScriptValue::Undeletable);
    configObject.setProperty("loaded", ((scriptConfig.toHash().empty())?eng->newVariant((bool)0):eng->newVariant((bool)1)), QScriptValue::Undeletable);
    (eng->globalObject()).setProperty("config", configObject);
    }

void KWin::MetaScripting::supplyConfig(QScriptEngine* eng)
    {
    KWin::MetaScripting::supplyConfig(eng, QVariant(QHash<QString, QVariant>()));
    }

void KWin::MetaScripting::valueMerge(QScriptValue& first, QScriptValue second)
    {
    QScriptValueIterator value_it(second);

    while(value_it.hasNext())
        {
        value_it.next();
        first.setProperty(value_it.name(), value_it.value());
        }
    }

QScriptValue KWin::MetaScripting::getLazyLogicFunction(QScriptEngine* eng, const QString& type)
    {
    QScriptValue base = eng->newFunction(KWin::Chelate::lazyLogicGenerate, 0);
    QScriptValue data = eng->newObject();
    data.setProperty("lazylogic_type", eng->toScriptValue<QString>(type));
    base.setData(data);
    return base;
    }