/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the Qt Mobility Components.
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** No Commercial Usage
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** contained in the Technology Preview License Agreement accompanying
** this package.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** $QT_END_LICENSE$
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****************************************************************************/

#include "qmediapluginloader_p.h"
#include <QtCore/qcoreapplication.h>
#include <QtCore/qpluginloader.h>
#include <QtCore/qdir.h>
#include <QtCore/qdebug.h>

#include "qmediaserviceproviderplugin.h"

QTM_BEGIN_NAMESPACE


typedef QMap<QString,QObjectList> ObjectListMap;
Q_GLOBAL_STATIC(ObjectListMap, staticMediaPlugins);

QMediaPluginLoader::QMediaPluginLoader(const char *iid, const QString &location, Qt::CaseSensitivity):
    m_iid(iid)
{
    m_location = location + "/";
    load();
}

QStringList QMediaPluginLoader::keys() const
{
    return m_instances.keys();
}

QObject* QMediaPluginLoader::instance(QString const &key)
{
    return m_instances.value(key);
}

QList<QObject*> QMediaPluginLoader::instances(QString const &key)
{
    return m_instances.values(key);
}

//to be used for testing purposes only
void QMediaPluginLoader::setStaticPlugins(const QString &location, const QObjectList& objects)
{
    staticMediaPlugins()->insert(location+"/", objects);
}

void QMediaPluginLoader::load()
{
    if (!m_instances.isEmpty())
        return;

    if (staticMediaPlugins() && staticMediaPlugins()->contains(m_location)) {
        foreach(QObject *o, staticMediaPlugins()->value(m_location)) {
            if (o != 0 && o->qt_metacast(m_iid) != 0) {
                QFactoryInterface* p = qobject_cast<QFactoryInterface*>(o);
                if (p != 0) {
                    foreach (QString const &key, p->keys())
                        m_instances.insertMulti(key, o);
                }
            }
        }
    } else {
        QStringList     paths = QCoreApplication::libraryPaths();

#ifdef QTM_PLUGIN_PATH
        paths << QTM_PLUGIN_PATH;
#endif

        foreach (QString const &path, paths) {
            QString     pluginPathName(path + m_location);
            QDir        pluginDir(pluginPathName);

            if (!pluginDir.exists())
                continue;

            foreach (QString pluginLib, pluginDir.entryList(QDir::Files)) {
                QPluginLoader   loader(pluginPathName + pluginLib);

                QObject *o = loader.instance();
                if (o != 0 && o->qt_metacast(m_iid) != 0) {
                    QFactoryInterface* p = qobject_cast<QFactoryInterface*>(o);
                    if (p != 0) {
                        foreach (QString const &key, p->keys())
                            m_instances.insertMulti(key, o);
                    }

                    continue;
                } else {
                    qWarning() << "QMediaPluginLoader: Failed to load plugin: " << pluginLib << loader.errorString();
                }
                delete o;
                loader.unload();
            }
        }
    }
}
QTM_END_NAMESPACE