/*

 * Copyright (c) 2010 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 NMHSWIDGETEMAILENGINE_H_

#define NMHSWIDGETEMAILENGINE_H_

#include <QObject>

#include "nmcommon.h"

class NmMessageEnvelope;

class NmDataPluginFactory;

class NmDataPluginInterface;

class QPluginLoader;

class QTimer;

class XQAiwRequest;

//Three seconds

const int NmHsWidgetEmailEngineUpdateTimerValue = 3000;

enum NmHsWidgetEmailEngineExceptionCode

    {

    NmEngineExcFailure,

    NmEngineExcAccountDeleted

    };

class NmHsWidgetEmailEngine : public QObject

    {

    Q_OBJECT

public:

    NmHsWidgetEmailEngine( const NmId& monitoredMailboxId );

    bool initialize(); 

    ~NmHsWidgetEmailEngine();

    int getEnvelopes(QList<NmMessageEnvelope> &list, int maxEnvelopeAmount);

    int unreadCount();

    QString accountName();

    void deleteAiwRequest();

public slots:

    void handleMessageEvent( 

            NmMessageEvent event,

            const NmId &folderId,

            const QList<NmId> &messageIds,

            const NmId& mailboxId);

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

    //Activity control

    void suspend();

    void activate();

    void launchMailAppInboxView();

    void launchMailAppMailViewer(const NmId &messageId);

    void handleUpdateTimeout();

    void aiwRequestOk(const QVariant& result);

    void aiwRequestError(int errorCode, const QString& errorMessage);

signals:

    void mailDataChanged();    

    void accountNameChanged(const QString& accountName);

    void unreadCountChanged(const int& unreadCount);

    void exceptionOccured(const int& err);

private:

    bool constructNmPlugin();

    bool updateData(); 

    bool updateAccount();

    void resetEnvelopeList();

private:

    NmId mMailboxId;

    NmId mFolderId;

    QString mAccountName;

    int mUnreadCount;

    QList<NmMessageEnvelope*> mEnvelopeList;

    NmDataPluginInterface *mEmailInterface;

    NmDataPluginFactory* mFactory;

    //suspension variables

    bool mAccountEventReceivedWhenSuspended;

    bool mMessageEventReceivedWhenSuspended;

    bool mSuspended; 

    QTimer* mUpdateTimer;

    XQAiwRequest* mAiwRequest;

    };

#endif /* NMHSWIDGETEMAILENGINE_H_ */