/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#ifndef NMAPIENGINE_H

#define NMAPIENGINE_H

#include "nmcommon.h"

#include "nmapiprivateclasses.h"

class NmApiDataPluginFactory;

namespace EmailClientApi

{

class NmApiMailbox;

class NmApiFolder;

class NmApiMessageEnvelope;

}

class NmApiEngine : public QObject

{

    Q_OBJECT

public:

    static NmApiEngine* instance();

    static void releaseInstance(NmApiEngine *&engine);

    void listMailboxes(QList<EmailClientApi::NmApiMailbox> &mailboxList);

    void listFolders(const quint64 mailboxId, QList<EmailClientApi::NmApiFolder> &folderList);

    void listEnvelopes(const quint64 mailboxId, const quint64 folderId, 

	                   QList<EmailClientApi::NmApiMessageEnvelope> &messageEnvelopeList);

    bool getEnvelopeById(

        const quint64 mailboxId,

        const quint64 folderId,

        const quint64 envelopeId,

        EmailClientApi::NmApiMessageEnvelope &envelope);

    bool getMailboxById(const quint64 mailboxId, EmailClientApi::NmApiMailbox &mailbox);

    void startCollectingEvents();

    signals:

    /*!

       It contains info about event in emailstore.

       \arg Contains info about event and related object (message or mailbox list)

     */

    void emailStoreEvent(NmApiMessage message);

private slots:

    void mailboxChangedArrived(NmMailboxEvent, const QList<NmId> &mailboxIds);

    void messageChangedArrived(

        NmMessageEvent messageEvent,

        const NmId &folderId,

        const QList<NmId> &messageIds,

        const NmId &mailboxId);

private:

    NmApiEngine();

    virtual ~NmApiEngine();

private:

    static NmApiEngine *mInstance;//!<Static instance of NmApiEngine. There can be only one instance of engine

    static quint32 mReferenceCount;//!<Count of refences to engine instance

    NmApiDataPluginFactory *mFactory;//!<Plugin factory. Is needed to get plugins for emails

};

#endif /* NMAPIENGINE_H */