/*

* 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: VideoListDataModel class implementation

* 

*/

// INCLUDE FILES

#include <hbglobal.h>

#include <vcxmyvideosdefs.h>

#include "videolistdatamodel.h"

#include "videolistdatamodel_p.h"

#include "videocollectionclient.h"

#include "videocollectioncommon.h"

#include "videocollectionutils.h"

#include "videodeleteworker.h"

#include "videocollectionwrapper.h"

// ================= MEMBER FUNCTIONS =======================

//

// -----------------------------------------------------------------------------

// VideoListDataModel()

// -----------------------------------------------------------------------------

//

VideoListDataModel::VideoListDataModel(QObject *parent) :

QAbstractItemModel(parent),

d_ptr( new VideoListDataModelPrivate(this)), 

mCollectionClient(0),

mDeleteWorker(0),

mInitialized(false)

{

}

// -----------------------------------------------------------------------------

// ~VideoListDataModel()

// -----------------------------------------------------------------------------

//

VideoListDataModel::~VideoListDataModel()

{

    delete mDeleteWorker;

    delete d_ptr;

    delete mCollectionClient;

}

// -----------------------------------------------------------------------------

// initialize()

// -----------------------------------------------------------------------------

//

int VideoListDataModel::initialize()

{

    if(mInitialized)

    {

        return 0;

    }

    if(!mCollectionClient)

    {

        mCollectionClient = new VideoCollectionClient();

        if(!mCollectionClient || mCollectionClient->initialize(d_ptr) < 0)

        {

            delete mCollectionClient;

            mCollectionClient = 0;

            return -1;

        }

    }

    if(!mDeleteWorker)

    {

        mDeleteWorker = new VideoDeleteWorker(*mCollectionClient);

        if(!mDeleteWorker)

        {

            delete mCollectionClient;

            mCollectionClient = 0;

            return -1;

        }

    }

    if( d_ptr->initialize() == -1)            

    {

        return -1;

    }

    if(connectSignals() == -1)

    {

        disconnectSignals();

        return -1;

    }

    mInitialized = true;

    return 0;

}

// -----------------------------------------------------------------------------

// getCollectionClient()

// -----------------------------------------------------------------------------

//

VideoCollectionClient* VideoListDataModel::getCollectionClient()

{

    return mCollectionClient;

}

// -----------------------------------------------------------------------------

// connectSignals()

// -----------------------------------------------------------------------------

//

int VideoListDataModel::connectSignals()

{

    if(!connect(d_ptr, SIGNAL(dataChanged(const QModelIndex&, const QModelIndex&)),

                           this, SIGNAL(dataChanged(const QModelIndex&, const QModelIndex&))))

    {

        return -1;

    }

    if(!connect(d_ptr, SIGNAL(videoDetailsReady(TMPXItemId)),

                       this, SIGNAL(fullVideoDetailsReady(TMPXItemId))))

    {

        return -1;

    }

    if(!connect(this, SIGNAL(modelChanged()), mDeleteWorker, SLOT(continueSlot())))

    {

        return -1;

    }

    if(!connect(this, SIGNAL(modelReady()), mDeleteWorker, SLOT(continueSlot())))

    {

        return -1;

    }

    if(!connect(mDeleteWorker, SIGNAL(deleteStartupFailed(QList<TMPXItemId>)), 

            this, SLOT(deleteStartingFailsSlot(QList<TMPXItemId>))))

    {

        return -1;

    }

    return 0;

}

// -----------------------------------------------------------------------------

// disconnectSignals()

// -----------------------------------------------------------------------------

//

void VideoListDataModel::disconnectSignals()

{

    disconnect(d_ptr, SIGNAL(dataChanged(const QModelIndex&, const QModelIndex&)),

                               this, SIGNAL(dataChanged(const QModelIndex&, const QModelIndex&)));

    disconnect(d_ptr, SIGNAL(videoDetailsReady(TMPXItemId)),

                           this, SIGNAL(fullVideoDetailsReady(TMPXItemId)));

    disconnect(this, SIGNAL(modelChanged()), mDeleteWorker, SLOT(continueSlot()));

    disconnect(this, SIGNAL(modelReady()), mDeleteWorker, SLOT(continueSlot()));

    disconnect(mDeleteWorker, SIGNAL(deleteStartupFailed(QList<TMPXItemId>)), 

                this, SLOT(deleteStartingFailsSlot(QList<TMPXItemId>)));

}

// -----------------------------------------------------------------------------

// mediaIdAtIndex()

// -----------------------------------------------------------------------------

//

TMPXItemId VideoListDataModel::mediaIdAtIndex(int index) const

{

    TMPXItemId mpxId =TMPXItemId::InvalidId();

    if(index >= 0 && index < d_ptr->getVideoCount())

    {

        mpxId = d_ptr->getMediaIdFromIndex(index);

    }

    return mpxId;

}

// -----------------------------------------------------------------------------

// indexOfId()

// -----------------------------------------------------------------------------

//

QModelIndex VideoListDataModel::indexOfId(TMPXItemId id)

{

    int rowIndex = d_ptr->mMediaData.indexOfId(id);

    return index(rowIndex, 0, QModelIndex());     

}

// -----------------------------------------------------------------------------

// mediaFilePathForId()

// -----------------------------------------------------------------------------

//

QString VideoListDataModel::mediaFilePathForId(TMPXItemId mediaId) const

{

    QString filePath;

    filePath = d_ptr->getFilePathForId(mediaId);

    return filePath;

}

// -----------------------------------------------------------------------------

// rowCount()

// -----------------------------------------------------------------------------

//

int VideoListDataModel::rowCount(const QModelIndex &parent ) const

{

    // according to Qt documentation if parent is valid this should return 0 if

    // implementing a table based implementation like this.

    if (parent.isValid())

    {

        return 0;

    }

    return d_ptr->getVideoCount();

}

// -----------------------------------------------------------------------------

// itemData()

// -----------------------------------------------------------------------------

//

QMap<int, QVariant> VideoListDataModel::itemData(const QModelIndex &index) const

{

    QMap<int, QVariant> itemData;

    if (index.isValid()) 

    {

        // returns only basic data of the item

        itemData.insert(Qt::DisplayRole, data(index, Qt::DisplayRole));

        itemData.insert(Qt::DecorationRole, data(index, Qt::DecorationRole)); 

        itemData.insert(Qt::BackgroundRole, data(index, Qt::BackgroundRole)); 

    }

    return itemData;

}

// -----------------------------------------------------------------------------

// prepareDetailRow()

// -----------------------------------------------------------------------------

//

QString VideoListDataModel::prepareDetailRow(int index) const

{

    // TODO: download -status?

    QString retString;

    TMPXItemId itemId = mediaIdAtIndex(index);

    if(itemId.iId2 != KVcxMvcMediaTypeVideo) //category || album

    {

        retString = prepareVideoCountString(index);

    }

    else //video

    {

        const QString sizeStr = prepareSizeString(index);

        const QStringList list = prepareLengthStrings( index );

        QString duration;

        duration.append(list.at(0));

        duration.append(":");

        duration.append(list.at(1));

        duration.append(":");

        duration.append(list.at(2));

        retString = hbTrId("txt_videos_dblist_captured_val_1_l1").arg(duration).arg(sizeStr);

    }

    return retString; 

}

// -----------------------------------------------------------------------------

// prepareVideoCountString()

// -----------------------------------------------------------------------------

//

QString VideoListDataModel::prepareVideoCountString(int index) const

{

    QString videoCountString("");

    quint32 items = d_ptr->getCategoryVideoCountFromIndex(index);

    if(items > 0)

    {

        videoCountString = hbTrId("txt_videos_dblist_val_ln_videos", items);

    }

    else

    {

        videoCountString = hbTrId("txt_videos_info_no_videos");

    }

    return videoCountString;

}

// -----------------------------------------------------------------------------

// prepareSizeString()

// -----------------------------------------------------------------------------

//

QString VideoListDataModel::prepareSizeString(int index) const

{

    QString sizeStr("");

    quint32 size = d_ptr->getVideoSizeFromIndex(index);

    sizeStr = VideoCollectionUtils::instance().prepareSizeString(size);

    return sizeStr;

}

// -----------------------------------------------------------------------------

// VideoListDataModel::prepareLengthStrings()

// -----------------------------------------------------------------------------

//

QStringList VideoListDataModel::prepareLengthStrings(int index) const

{

    quint32 total = d_ptr->getVideodurationFromIndex(index);

    return VideoCollectionUtils::instance().prepareLengthStrings(total);

}

// -----------------------------------------------------------------------------

// data()

// -----------------------------------------------------------------------------

//

QVariant VideoListDataModel::data(const QModelIndex & index, int role) const

{

    QVariant returnValue = QVariant();

    if (index.isValid()) 

    {

        int rowIndex = index.row();

        if (role == Qt::DisplayRole)

        {

            QStringList itemTxt;

            itemTxt.append(d_ptr->getVideoNameFromIndex(rowIndex));

            // Item's 2nd row: details

            itemTxt.append(prepareDetailRow(rowIndex));

            returnValue = itemTxt;

        }

        else if (role == Qt::DecorationRole)

        {

            const QIcon *thumbnail = d_ptr->getVideoThumbnailFromIndex(rowIndex); 

            QVariant tnVariant(QVariant::Icon, thumbnail);

            returnValue = tnVariant;

        }

        else if (role == VideoCollectionCommon::KeyDateTime)

        {

            QDateTime date = d_ptr->getVideoDateFromIndex(rowIndex);

            returnValue = date;

        }

        else if(role == VideoCollectionCommon::KeySizeValue)

        {

            quint32 size = d_ptr->getVideoSizeFromIndex(rowIndex);

            returnValue = size;

        }

        else if(role == VideoCollectionCommon::KeyMetaData)

        {

            returnValue = d_ptr->getMetaDataFromIndex(rowIndex);

        }

        else if(role == VideoCollectionCommon::KeyFilePath)

        {

            QString path = d_ptr->getFilePathFromIndex(rowIndex);

            if(!(path.isNull()) && !(path.isEmpty())) { 

                returnValue = path;

            }

        }

    }

    return returnValue;

}

// -----------------------------------------------------------------------------

// columnCount()

// -----------------------------------------------------------------------------

//

int VideoListDataModel::columnCount(const QModelIndex & parent) const

{

    // according to Qt documentation if parent is valid this should return 0 if

    // implementing a table based implementation like this.

    if (parent.isValid())

    {

        return 0;

    }

    else

    {

        return 1;

    }

}

// -----------------------------------------------------------------------------

// index()

// -----------------------------------------------------------------------------

//

QModelIndex VideoListDataModel::index(int row, int column, const QModelIndex & /*parent*/) const

{

    if(row >= 0 && row < d_ptr->getVideoCount())

    {

        return createIndex(row, column);

    }

    return QModelIndex();

}

// -----------------------------------------------------------------------------

// parent()

// -----------------------------------------------------------------------------

//

QModelIndex VideoListDataModel::parent(const QModelIndex & /*index*/) const

{

    return QModelIndex();

}

// -----------------------------------------------------------------------------

// removeRows()

// -----------------------------------------------------------------------------

//

bool VideoListDataModel::removeRows(const QModelIndexList &indexList)

{

    if(!mCollectionClient || !mDeleteWorker)

    {

        return false;

    }

    // generate list of deletable item ids

    TMPXItemId id = TMPXItemId::InvalidId();

    QList<TMPXItemId> removedIds;

    QModelIndexList sortable(indexList);

    qSort(sortable);

    // since items are removed from actual container when being marked

    // causing total item count to be decreased,

    // we need to mark items starting from biggest index, otherwise we might 

    // end up to mark invalid items or we are referring into null item

    QModelIndexList::const_iterator iter = sortable.constEnd();

    while(iter != sortable.constBegin())

    {

        iter--;

        beginRemoveRows(QModelIndex(), (*iter).row(), (*iter).row());

        // marking might fail if either because

        // item does no exist or index is incorrect.

        // Both reasons mean that item is incorrect and should be removed

        // from the view. No need to restain them

        id = d_ptr->markVideoRemoved((*iter));

        endRemoveRows();

        if(id != TMPXItemId::InvalidId())

        {

            removedIds.append(id);

        }

    }

    emit modelChanged();

    if(removedIds.count() > 0 )

    {                         

        mDeleteWorker->requestDelete(removedIds);

        return true;

    }

    return false;

}

// -----------------------------------------------------------------------------

// belongsToAlbum()

// -----------------------------------------------------------------------------

//

bool VideoListDataModel::belongsToAlbum(const TMPXItemId &itemId,

      TMPXItemId albumId ) const

{

    return d_ptr->belongsToAlbum(itemId, albumId);

}

// -----------------------------------------------------------------------------

// setAlbumInUse()

// -----------------------------------------------------------------------------

//

void VideoListDataModel::setAlbumInUse(TMPXItemId albumId)

{

    d_ptr->setAlbumInUse(albumId);

}

// -----------------------------------------------------------------------------

// albumInUse()

// -----------------------------------------------------------------------------

//

TMPXItemId VideoListDataModel::albumInUse()

{

    return d_ptr->mCurrentAlbum;

}

// -----------------------------------------------------------------------------

// removeItemsFromAlbum()

// -----------------------------------------------------------------------------

//

int VideoListDataModel::removeItemsFromAlbum(TMPXItemId &albumId, const QList<TMPXItemId> &items)

{

    int removeCount = d_ptr->removeItemsFromAlbum(albumId, items);

    if(removeCount)

    {

        if(mCollectionClient->removeItemsFromAlbum(albumId, items) < 0)

        {

            return -1;

        }

        emit albumChanged();

    }

    return removeCount;

}   

// -----------------------------------------------------------------------------

// deleteStartingFailsSlot()

// -----------------------------------------------------------------------------

//

void VideoListDataModel::deleteStartingFailsSlot(QList<TMPXItemId> ids)

{

    if(ids.count())

    {        

        d_ptr->restoreRemoved(&ids);

        QVariant data = ids.count();

        reportAsyncStatus(VideoCollectionCommon::statusMultipleDeleteFail, data);

    }    

    // signal for worker to proceed

    emit modelChanged();

}

// -----------------------------------------------------------------------------

// reportAsyncStatus()

// -----------------------------------------------------------------------------

//

void VideoListDataModel::reportAsyncStatus(int statusCode, QVariant &additional)

{

    bool report = true;

    if(statusCode == VideoCollectionCommon::statusSingleDeleteFail ||

       statusCode ==  VideoCollectionCommon::statusMultipleDeleteFail ||

       statusCode ==  VideoCollectionCommon::statusDeleteSucceed)

    {

        report = false;

        if(!mDeleteWorker)

        {