/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: http://www.qt-project.org/
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser 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 will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
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**************************************************************************/

#ifndef PLUGINMANAGER_P_H
#define PLUGINMANAGER_P_H

#include "pluginspec.h"

#include <QSet>
#include <QStringList>
#include <QObject>
#include <QScopedPointer>

QT_BEGIN_NAMESPACE
class QTime;
class QTimer;
class QSettings;
class QEventLoop;
QT_END_NAMESPACE

namespace ExtensionSystem {

class PluginManager;
class PluginCollection;

namespace Internal {

class PluginSpecPrivate;

class EXTENSIONSYSTEM_EXPORT PluginManagerPrivate : QObject
{
    Q_OBJECT
public:
    PluginManagerPrivate(PluginManager *pluginManager);
    virtual ~PluginManagerPrivate();

    // Object pool operations
    void addObject(QObject *obj);
    void removeObject(QObject *obj);

    // Plugin operations
    void loadPlugins();
    void shutdown();
    void setPluginPaths(const QStringList &paths);
    QList<PluginSpec *> loadQueue();
    void loadPlugin(PluginSpec *spec, PluginSpec::State destState);
    void resolveDependencies();
    void initProfiling();
    void profilingReport(const char *what, const PluginSpec *spec = 0);
    void setSettings(QSettings *settings);
    void setGlobalSettings(QSettings *settings);
    void readSettings();
    void writeSettings();
    void disablePluginIndirectly(PluginSpec *spec);

    QHash<QString, PluginCollection *> pluginCategories;
    QList<PluginSpec *> pluginSpecs;
    QList<PluginSpec *> testSpecs;
    QStringList pluginPaths;
    QString extension;
    QList<QObject *> allObjects; // ### make this a QList<QPointer<QObject> > > ?
    QStringList defaultDisabledPlugins;
    QStringList disabledPlugins;
    QStringList forceEnabledPlugins;
    // delayed initialization
    QTimer *delayedInitializeTimer;
    QList<PluginSpec *> delayedInitializeQueue;
    // ansynchronous shutdown
    QList<PluginSpec *> asynchronousPlugins; // plugins that have requested async shutdown
    QEventLoop *shutdownEventLoop; // used for async shutdown

    QStringList arguments;
    QScopedPointer<QTime> m_profileTimer;
    int m_profileElapsedMS;
    unsigned m_profilingVerbosity;
    QSettings *settings;
    QSettings *globalSettings;

    // Look in argument descriptions of the specs for the option.
    PluginSpec *pluginForOption(const QString &option, bool *requiresArgument) const;
    PluginSpec *pluginByName(const QString &name) const;

    // used by tests
    static PluginSpec *createSpec();
    static PluginSpecPrivate *privateSpec(PluginSpec *spec);

private slots:
    void nextDelayedInitialize();
    void asyncShutdownFinished();

private:
    PluginCollection *defaultCollection;
    PluginManager *q;

    void readPluginPaths();
    bool loadQueue(PluginSpec *spec,
            QList<PluginSpec *> &queue,
            QList<PluginSpec *> &circularityCheckQueue);
    void stopAll();
    void deleteAll();
};

} // namespace Internal
} // namespace ExtensionSystem

#endif // PLUGINMANAGER_P_H