/*

* 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: VideoProxyModelGeneric implementation

*

*/

// Version : 

// INCLUDE FILES

#include <qstringlist.h>

#include <qset.h>

#include <qtimer.h>

#include <qdatetime.h>

#include <vcxmyvideosdefs.h>

#include "videothumbnaildata.h"

#include "videocollectioncommon.h"

#include "videoproxymodelgeneric.h"

#include "videolistdatamodel.h"

#include "videocollectionclient.h"

#include "videocollectionwrapper.h"

#include "videocollectiontrace.h"

const TMPXItemId INVALID_ID = TMPXItemId::InvalidId();

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

// VideoProxyModelGeneric::VideoProxyModelGeneric

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

//

VideoProxyModelGeneric::VideoProxyModelGeneric(QObject *parent) :

QSortFilterProxyModel(parent),

mModel(0),

mCollectionClient(0),

mLevel(VideoCollectionCommon::ELevelInvalid),

mGenericFilterId(TMPXItemId::InvalidId()),

mGenericFilterValue(false),

mIdleSortTimer(0),

mWantedSortRole(VideoCollectionCommon::KeyDateTime),

mWantedSortOrder(Qt::AscendingOrder),

mDefaultSortRole(VideoCollectionCommon::KeyTitle)

{

	FUNC_LOG_ADDR(this);

}

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

// VideoProxyModelGeneric::~VideoProxyModelGeneric

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

//

VideoProxyModelGeneric::~VideoProxyModelGeneric()

{

	FUNC_LOG_ADDR(this);

}

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

// VideoProxyModelGeneric::initialize

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

//

int VideoProxyModelGeneric::initialize(VideoListDataModel *sourceModel)

{

    FUNC_LOG_ADDR(this);

    if(!sourceModel) 

    {

        return -1;

    }

    mModel = sourceModel;

    if(!connectSignals())

    {

        ERROR_1(-1, "VideoProxyModelGeneric::initialize() [0x%x] failed to connect signals.", this);

        disconnectSignals();

        mModel = 0;

        return -1;

    }

    mCollectionClient = sourceModel->getCollectionClient();

    if(!mCollectionClient)

    {

        mModel = 0;

        return -1;

    }

    setSourceModel(sourceModel);

    return 0;

}

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

// VideoProxyModelGeneric::connectSignals

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

//

bool VideoProxyModelGeneric::connectSignals()

{

    FUNC_LOG_ADDR(this);

    if(!connect(mModel, SIGNAL(modelChanged()),

                    this, SLOT(invalidate()))) 

    {

        return false;

    }

    return true;

}

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

// VideoProxyModelGeneric::disconnectSignals

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

//

void VideoProxyModelGeneric::disconnectSignals()

{

    FUNC_LOG_ADDR(this);

    disconnect(mModel, SIGNAL(modelChanged()), this, SLOT(invalidate()));

}

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

// VideoProxyModelGeneric::open

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

//

int VideoProxyModelGeneric::open(VideoCollectionCommon::TCollectionLevels level)

{

    FUNC_LOG_ADDR(this);

    INFO_2("VideoProxyModelGeneric::open() [0x%x] level: %d", this, level);

    if(!mCollectionClient)

    {

        return -1;

    }

    if(mLevel != level) 

    {

       INFO_1("VideoProxyModelGeneric::open() [0x%x] opening different level, invalidating.", this);

       mLevel = level;

       invalidateFilter();

       // sorting call required here to setup correct sort order in cases where source model allready 

       // contains items but proxy is not yet updated. (invalidate -call does not work since it updates proxy and

       // calls sort in different order for us to use)

       sort(0, mWantedSortOrder);

    }

    // need to call open every time to make sure all items are 

    // inserted to UI ( recent open might have been cancelled)

    return mCollectionClient->startOpenCollection(level);

}

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

// VideoProxyModelGeneric::doSorting

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

//

void VideoProxyModelGeneric::doSorting(int sortingRole, Qt::SortOrder order, 

        bool async)

{

    FUNC_LOG_ADDR(this);

    INFO_3("VideoProxyModelGeneric::doSorting() [0x%x] sortingRole: %d, order: %d", this, sortingRole, order);

    if(sortingRole != VideoCollectionCommon::KeyTitle &&

       sortingRole != VideoCollectionCommon::KeySizeValue &&

       sortingRole != VideoCollectionCommon::KeyDateTime &&

       sortingRole != VideoCollectionCommon::KeyNumberOfItems)

    {

        mWantedSortRole = mDefaultSortRole;

    }

    else

    {

        mWantedSortRole = sortingRole;

    }

    mWantedSortOrder = order;

    if(async)

    {

        if(mIdleSortTimer)

        {

            if(mIdleSortTimer->isActive())

            {

                mIdleSortTimer->stop();

            }

        }

        else

        {

            mIdleSortTimer = new QTimer(this);

            connect(mIdleSortTimer, SIGNAL(timeout()), 

                    this, SLOT(processSortingSlot()));

        }

        mIdleSortTimer->start(0);

    }

    else

    {

        processSorting();

    }

}

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

// VideoProxyModelGeneric::getSorting

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

//

void VideoProxyModelGeneric::getSorting(int &sortingRole, Qt::SortOrder &order)

{

    FUNC_LOG_ADDR(this);

    sortingRole = mWantedSortRole;

    order       = mWantedSortOrder;

}

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

// VideoProxyModelGeneric::deleteItems

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

//

int VideoProxyModelGeneric::deleteItems(const QModelIndexList &indexList)

{

    FUNC_LOG_ADDR(this);

    // Disable thumbnail fetching while items are removed from the model. 

    VideoThumbnailData::instance().enableBackgroundFetching(false);

    if(mModel)

    {

        QModelIndexList mappedList;

        for(int i = 0; i < indexList.count(); ++i)

        {

            mappedList.append(mapToSource(indexList.at(i)));

        }

        if(mModel->removeRows(mappedList))

        {

            // Start fetching thumbnails at start of the model.

            VideoThumbnailData::instance().enableBackgroundFetching(true);

            VideoThumbnailData::instance().startBackgroundFetching(0, 0);

            return 0;

        }

    }

    VideoThumbnailData::instance().enableBackgroundFetching(true);

    return -1;

}

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

// VideoProxyModelGeneric::openItem

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

//

int VideoProxyModelGeneric::openItem(TMPXItemId mediaId)

{

    FUNC_LOG_ADDR(this);

    if(mediaId != TMPXItemId::InvalidId() && mCollectionClient)

    {

        if(mCollectionClient->openItem(mediaId) == 0)

        {

            if(mediaId.iId2 != KVcxMvcMediaTypeVideo)

            { 

                mLevel = VideoCollectionCommon::ELevelAlbum;

                mModel->setAlbumInUse(mediaId);

                INFO_1("VideoProxyModelGeneric::open() [0x%x] opening album or category, invalidating.", this);

                invalidateFilter();

                // sorting call required here to setup correct sort order in cases where source model allready 

                // contains items but proxy is not yet updated. (invalidate -call does not work since it updates proxy and

                // calls sort in different order for us to use)

                sort(0, mWantedSortOrder);

            } 

            return 0;

        }

    }

    return -1;

}

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

// VideoProxyModelGeneric::back

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

//

int VideoProxyModelGeneric::back()

{

    FUNC_LOG_ADDR(this);

    if(mCollectionClient && mCollectionClient->back() == 0)

    {

        if(mLevel == VideoCollectionCommon::ELevelAlbum)

        {

            mLevel = VideoCollectionCommon::ELevelCategory;

        }

        else

        {

            mLevel = VideoCollectionCommon::ELevelVideos;

        }

        return 0;

    }

    return -1;

}

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

// VideoProxyModelGeneric::fetchItemDetails

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

//

int VideoProxyModelGeneric::fetchItemDetails(const QModelIndex &index)

{

    FUNC_LOG_ADDR(this);

    // no need to map index beforehand, because 

    // getMediaIdAtIndex maps it

    TMPXItemId mpxId1 = getMediaIdAtIndex(index);

    if(mpxId1 != TMPXItemId::InvalidId() && mCollectionClient)

    {

        if(mCollectionClient->getVideoDetails(mpxId1) == 0)

        {

            emit shortDetailsReady(mpxId1);

            return 0;

        }

    }

    return -1;

}

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

// VideoProxyModelGeneric::lessThan

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

//

bool VideoProxyModelGeneric::lessThan(const QModelIndex &left,

    const QModelIndex &right) const

{

    if (!mModel)

    {

        return false;

    }

    // Do comparisation based on the role:

    //  VideoCollectionCommon::KeyTitle,

    //  VideoCollectionCommon::KeySizeValue,

    //  VideoCollectionCommon::KeyNumberOfItems,

    //  VideoCollectionCommon::KeyDateValue

    // 

    // If role does not match, do not sort

    int sRole = sortRole();

    QVariant leftData = sourceModel()->data(left, sRole);

    QVariant rightData = sourceModel()->data(right, sRole);

    if(!leftData.isValid() || !rightData.isValid())

    {

        return false;

    }

    if(sRole == VideoCollectionCommon::KeyTitle)

    {

        QString leftString = leftData.toString().toUpper();

        QString rightString = rightData.toString().toUpper();

        return QString::localeAwareCompare(leftString, rightString) < 0;

    }

    else if(sRole == VideoCollectionCommon::KeySizeValue ||

            sRole == VideoCollectionCommon::KeyNumberOfItems)

    {

        quint32 leftSize = leftData.toUInt();

        quint32 rightSize = rightData.toUInt();

        return leftSize < rightSize;

    }

    else if(sRole == VideoCollectionCommon::KeyDateTime)

    {

        QDateTime leftDateTime = leftData.toDateTime();

        QDateTime rightDateTime = rightData.toDateTime();

        // datetime sorting role has inverted sorting order compared to other roles 

        return rightDateTime < leftDateTime;

    }

    return false;

}

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

// VideoProxyModelGeneric::filterAcceptsRow

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

//

bool VideoProxyModelGeneric::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const

{

    Q_UNUSED(source_parent);

    if(!sourceModel())

    {

        return false;

    }

    if(source_row < 0 || source_row >= sourceModel()->rowCount())

    {

        return false;

    }

    TMPXItemId id = mModel->mediaIdAtIndex(source_row);

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

    {

        return false;

    }

    if(mLevel == VideoCollectionCommon::ELevelVideos && id.iId2 == KVcxMvcMediaTypeVideo)

    {

        //  filter items that belong to that album setted as filter id

        // if there's no filter or setted filter is "all videos", we accept everything

        if(mGenericFilterId == TMPXItemId::InvalidId() || 

           (mGenericFilterId.iId1 == KVcxMvcCategoryIdAll && 

            mGenericFilterId.iId2 == KVcxMvcMediaTypeCategory) ||

            mGenericFilterValue == mModel->belongsToAlbum(id, mGenericFilterId))

        {

            return true;

        }

    }

    else if(mLevel == VideoCollectionCommon::ELevelCategory && id.iId2 == KVcxMvcMediaTypeAlbum)    

    {

        // we do not filter albums yet

        return true;

    }  

    return false;

}

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

// VideoProxyModelGeneric::getMediaIdAtIndex()

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

//

const TMPXItemId& VideoProxyModelGeneric::getMediaIdAtIndex(const QModelIndex &index) const

{

    if(index.isValid())

    {

        int rowIndex = mapToSource(index).row();

        if(mModel)

        {

            return mModel->mediaIdAtIndex(rowIndex);

        }

    }

    return INVALID_ID;

}

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

// VideoProxyModelGeneric::indexOfId()

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

//

QModelIndex VideoProxyModelGeneric::indexOfId(const TMPXItemId &id)

{    

    QModelIndex sourceIndex;

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

    {

        return sourceIndex;

    }

    sourceIndex = mModel->indexOfId(id);

    return mapFromSource(sourceIndex);

}

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

// VideoProxyModelGeneric::getMediaFilePathForId()

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

//

QString VideoProxyModelGeneric::getMediaFilePathForId(const TMPXItemId &mediaId)

{

    QString filePath;

    if(mModel)

    {

        filePath = mModel->mediaFilePathForId(mediaId);

    }

    return filePath;

}

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

// VideoProxyModelGeneric::addNewAlbum()

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

//

TMPXItemId VideoProxyModelGeneric::addNewAlbum(const QString &title)

{

    FUNC_LOG_ADDR(this);

    TMPXItemId id = TMPXItemId::InvalidId();

    if (mCollectionClient)

    {

        id = mCollectionClient->addNewAlbum(title);

    }

    return id;

}

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

// VideoProxyModelGeneric::removeAlbums()

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

//

int VideoProxyModelGeneric::removeAlbums(const QModelIndexList &indexList)

{

    FUNC_LOG_ADDR(this);

    int err(-1);

    if (mCollectionClient)

    {

        TMPXItemId mpxId;

        QList<TMPXItemId> ids;

        for(int i = 0; i < indexList.count(); ++i)

        {

            mpxId = getMediaIdAtIndex(indexList.at(i));

            if(mpxId != TMPXItemId::InvalidId() && 

               mpxId.iId2 == KVcxMvcMediaTypeAlbum)

            {

                ids.append(getMediaIdAtIndex(indexList.at(i)));

            }

        }

        if (ids.count())

        {

            err = mCollectionClient->removeAlbums(ids);

        }

    }

    return err;

}

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

// VideoProxyModelGeneric::resolveAlbumName()

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

//

QString VideoProxyModelGeneric::resolveAlbumName(

    const QString& albumName) const

{

    FUNC_LOG_ADDR(this);

    QString resolvedName = albumName.trimmed();

    // for checking names, we need to use collection list proxy model 

    // to get all existing album names including default ones

    VideoProxyModelGeneric *collectionModel = 

                       VideoCollectionWrapper::instance().getCollectionsModel();

    if(!collectionModel || !mModel)

    {

        return resolvedName;

    }    

    int i(0);

    QModelIndex proxyIndex = collectionModel->index(i, 0);

    QSet<QString> names;

    QVariant data;

    // create set of existing names

    while (proxyIndex.isValid())

    {

        data = mModel->data(collectionModel->mapToSource(proxyIndex), 

                VideoCollectionCommon::KeyTitle);