/*

* 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:

*

*/

#include "mobcnticonmanager.h"

#include <thumbnailmanager_qt.h>

#include <QDebug>

const int KMaxQueueSize = 25;

const int KContactFetchTimer1 = 400;

const int KContactFetchTimer2 = 20;

/*!

 Constructor

 */

MobCntIconManager::MobCntIconManager(QObject *parent)

    : QObject(parent),

      mQueueCount(0)

{

    mThumbnailManager = new ThumbnailManager(this);

    mThumbnailManager->setMode(ThumbnailManager::Default);

    mThumbnailManager->setQualityPreference(ThumbnailManager::OptimizeForPerformance);

    mThumbnailManager->setThumbnailSize(ThumbnailManager::ThumbnailSmall);

    connect(mThumbnailManager, SIGNAL(thumbnailReady(QPixmap, void *, int, int)),

             this, SLOT(thumbnailReady(QPixmap, void *, int, int)));

    mTimer = new QTimer();

    connect( mTimer, SIGNAL(timeout()), this, SLOT(timerTimeout()) );

}

/*!

 Destructor

 */

MobCntIconManager::~MobCntIconManager()

{

    cancel();

    mImageCache.clear();

    delete mTimer;

}

/*!

Get the icon for the requested avatarPath or send a new request to the thumbnailmanager if it doesn't exist yet

*/

QIcon MobCntIconManager::contactIcon(const QString &avatarPath, int index)

{

    QIcon icon;

    if ( mImageCache.contains(avatarPath) )

    {

        icon = mImageCache.value(avatarPath);

		qDebug() << "MobCntIconManager::contactIcon:: image was cached";

    }

    else

    {      

        mTimer->stop();

        mTimer->start(KContactFetchTimer1); 

        mQueueCount++;

        mRequestQueue.enqueue(qMakePair(avatarPath, index));

        if( mQueueCount > KMaxQueueSize )

        {

           mRequestQueue.dequeue();

           mQueueCount--;

        }        

    }

    return icon;

}

/*!

Cancel all requests

*/

void MobCntIconManager::cancel()

{

    if (!mTnmReqMap.empty())

    {

        QMapIterator<int, QString> iter(mTnmReqMap);

        while (iter.hasNext())

        {

            iter.next();

            bool result = mThumbnailManager->cancelRequest(iter.key());

        }

    }

    mTnmReqMap.clear();

    mRequestQueue.clear();

    mQueueCount = 0;

}

/*!

Called when thumbnailmanager finishes creating a thumbnail, emits a signal for MobCntModel to update icon for a contact

*/

void MobCntIconManager::thumbnailReady(const QPixmap& pixmap, void *data, int id, int error)

{

	qDebug() << "MobCntIconManager::thumbnailReady:: error is " << error;

    // Find the index

    if (mTnmReqMap.contains(id))

    {

        QString avatarPath = mTnmReqMap[id];

        mTnmReqMap.remove(id);

        if ( error == 0 )

        {

            int *clientData = (int *)data;

            int index = *clientData;

			qDebug() << "MobCntIconManager::thumbnailReady:: data is " << index;

            QIcon icon(pixmap);

            mImageCache.insert(avatarPath, icon);

            emit contactIconReady(index);

			qDebug() << "MobCntIconManager::thumbnailReady - signal emitted";

            if (!mRequestQueue.isEmpty())

            {

                mTimer->start(KContactFetchTimer2);                

            }

            delete clientData;

        } else {

        	  thumbnailLoad();

        }

    }

}

void MobCntIconManager::thumbnailLoad()

{

	mTimer->stop();

    if (!mRequestQueue.isEmpty())

    { 

		mQueueCount--;

        QPair<QString, int> req = mRequestQueue.dequeue();

        QString avatarPath = req.first;

        int index = req.second;

        int *clientData = new int(index);

        int reqId = mThumbnailManager->getThumbnail(avatarPath, clientData, 0);

        mTnmReqMap.insert(reqId, avatarPath);

    }

}

void MobCntIconManager::timerTimeout()

{

    thumbnailLoad();	

}