/********************************************************************
 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 "scripting.h"
#include <kstandarddirs.h>

KWin::Scripting::Scripting()
    {
    // Default constructor no longer used, scripting can
    // be disabled by calling kwin --noscript
    }

void KWin::Scripting::start()
    {
    QStringList scriptFilters;
    QString sDirectory = KStandardDirs::locateLocal("data", "kwin/scripts/");
    
    if(sDirectory.isEmpty()) {
        // Abort scripting setup. No location found to locate scripts
        return;
    }
    
    scriptFilters<<"*.kwinscript"<<"*.kws"<<"*.kwinqs";
    scriptsDir.setPath(sDirectory);
    scriptList = scriptsDir.entryList(scriptFilters, QDir::Files|QDir::Readable|QDir::Executable);

    for(int i=0; i<scriptList.size(); i++)
        {
        scripts.append(new KWin::Script(new QScriptEngine(), scriptsDir.filePath(scriptList.at(i)), scriptsDir));
        }

    // Initialize singletons. Currently, only KWin::Workspace.
    SWrapper::Workspace::initialize(KWin::Workspace::self());

    runScripts();
    }

void KWin::Scripting::runScript(KWin::Script* script)
    {
    if(script->scriptFile.open(QIODevice::ReadOnly))
        {
        script->workspace = new SWrapper::Workspace(script->engine);
        (script->workspace)->attach(script->engine);
        ((script->engine)->globalObject()).setProperty("QTimer", constructTimerClass((script->engine)));
        ((script->engine)->globalObject()).setProperty("ClientGroup", SWrapper::ClientGroup::publishClientGroupClass((script->engine)));
        ((script->engine)->globalObject()).setProperty("chelate", KWin::Chelate::publishChelate(script->engine));
        ((script->engine)->globalObject()).setProperty("ch", KWin::Chelate::publishChelate(script->engine));
        QObject::connect((script->engine), SIGNAL(signalHandlerException(const QScriptValue&)), this, SLOT(sigException(const QScriptValue&)));
        KWin::MetaScripting::registration(script->engine);

        if(scriptsDir.exists(script->configFile))
            {
            QSettings scriptSettings(scriptsDir.filePath(script->configFile), QSettings::IniFormat);
            QHash<QString, QVariant> scriptConfig;
            QStringList keys = scriptSettings.allKeys();

            for(int i=0; i<keys.size(); i++)
                {
                scriptConfig.insert(keys.at(i), scriptSettings.value(keys.at(i)));
                }

            KWin::MetaScripting::supplyConfig(script->engine, QVariant(scriptConfig));
            }
        else
            {
            KWin::MetaScripting::supplyConfig(script->engine);
            }

        QScriptValue ret = (script->engine)->evaluate(QString((script->scriptFile).readAll()));

        if(ret.isError())
            {
            sigException(ret);
            }
        }
    }


void KWin::Scripting::runScripts()
    {
    for(int i=0; i<scripts.size(); i++)
        {
        runScript(scripts.at(i));
        }
    }

void KWin::Scripting::sigException(const QScriptValue& exception)
    {
    QScriptValue ret = exception;
    if(ret.isError())
        {
        kDebug(1212)<<"defaultscript encountered an error at [Line "<<uncaughtExceptionLineNumber()<<"]";
        kDebug(1212)<<"Message: "<<ret.toString();
        kDebug(1212)<<"-----------------";

        QScriptValueIterator iter(ret);
        while(iter.hasNext())
            {
            iter.next();
            qDebug()<<" "<<iter.name()<<": "<<iter.value().toString();
            }
        }
    }

KWin::Scripting::~Scripting()
    {
    for(int i=0; i<scripts.size(); i++)
        {
        delete scripts.at(i);
        }
    }