/*
    Copyright 2008 Will Stephenson <wstephenson@kde.org>
    Copyright 2013 Lukáš Tinkl <ltinkl@redhat.com>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) version 3, or any
    later version accepted by the membership of KDE e.V. (or its
    successor approved by the membership of KDE e.V.), which shall
    act as a proxy defined in Section 6 of version 3 of the license.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PLASMA_NM_VPN_UI_PLUGIN_H
#define PLASMA_NM_VPN_UI_PLUGIN_H

#include <QObject>
#include <QVariant>
#include <QMessageBox>

#include <NetworkManagerQt/VpnSetting>
#include <NetworkManagerQt/ConnectionSettings>
#include <NetworkManagerQt/GenericTypes>

#include "settingwidget.h"

/**
 * Plugin for UI elements for VPN configuration
 */
class Q_DECL_EXPORT VpnUiPlugin : public QObject
{
    Q_OBJECT
public:
    enum ErrorType {NoError, NotImplemented, Error};

    explicit VpnUiPlugin(QObject * parent = nullptr, const QVariantList& = QVariantList());
    ~VpnUiPlugin() override;

    virtual SettingWidget * widget(const NetworkManager::VpnSetting::Ptr &setting, QWidget * parent = nullptr) = 0;
    virtual SettingWidget * askUser(const NetworkManager::VpnSetting::Ptr &setting, QWidget * parent = nullptr) = 0;

    /**
     * Suggested file name to save the exported connection configuration.
     * Try not to use space, parenthesis, or any other Unix unfriendly file name character.
     */
    virtual QString suggestedFileName(const NetworkManager::ConnectionSettings::Ptr &connection) const = 0;
    /**
     * File extension to be used in QFileDialog when selecting the file to import.
     * The format is: *.<extension> [*.<extension> ...]. For instance: '*.pcf'
     */
    virtual QString supportedFileExtensions() const = 0;

    /**
     * If the plugin does not support fileName's extension it must just return an empty QVariantList.
     * If it supports the extension and import has failed it must set mError with VpnUiPlugin::Error
     * and mErrorMessage with a custom error message before returning an empty QVariantList.
     */
    virtual NMVariantMapMap importConnectionSettings(const QString &fileName) = 0;
    virtual bool exportConnectionSettings(const NetworkManager::ConnectionSettings::Ptr &connection, const QString &fileName) = 0;

    virtual QMessageBox::StandardButtons suggestedAuthDialogButtons() const;
    ErrorType lastError() const;
    QString lastErrorMessage();
protected:
    ErrorType mError;
    QString mErrorMessage;
};

#endif // PLASMA_NM_VPN_UI_PLUGIN_H
