/*

* 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:   ?Description

*

*/

#include <glxmediamodel.h>

#include <hbicon.h>

#include <glxmodelparm.h>

#include <QCache>

#include <QDebug>

#include <hal.h>

#include <hal_data.h>

#include <glxfiltergeneraldefs.h>

//#define GLXPERFORMANCE_LOG  

#include <glxperformancemacro.h>

#include "glxicondefs.h" //Contains the icon names/Ids

GlxMediaModel::GlxMediaModel(GlxModelParm & modelParm)

{

	qDebug("GlxMediaModel::GlxMediaModel");

	mMLWrapper = new GlxMLWrapper(modelParm.collection(),0,EGlxFilterImage);

	mMLWrapper->setContextMode( modelParm.contextMode() );

	mContextMode = modelParm.contextMode( ) ; 

	int err = connect(mMLWrapper, SIGNAL(updateItem(int, GlxTBContextType)), this, SLOT(itemUpdated1(int, GlxTBContextType)));

	qDebug("updateItem() connection status %d", err);

	err = connect(mMLWrapper, SIGNAL(itemCorrupted(int)), this, SLOT(itemCorrupted(int)));

	qDebug("itemCorrupted() connection status %d", err);

	err = connect(mMLWrapper, SIGNAL(insertItems(int, int)), this, SLOT(itemsAdded(int, int)));

	qDebug("updateItem() connection status %d", err);

	err = connect(mMLWrapper, SIGNAL(removeItems(int, int)), this, SLOT(itemsRemoved(int, int)));

	qDebug("updateItem() connection status %d", err);

	err = connect(this, SIGNAL(iconAvailable(int, HbIcon*, GlxTBContextType)), this, SLOT(updateItemIcon(int, HbIcon*, GlxTBContextType)));

	qDebug("iconAvailable() connection status %d", err);

	//itemadded.resize(mMLWrapper->getItemCount());

	itemIconCache.setMaxCost(50);

	itemFsIconCache.setMaxCost(5);

	itemExternalIconCache.setMaxCost(0);

	//todo get this Default icon from some generic path and not directly.

	m_DefaultIcon = new HbIcon(GLXICON_DEFAULT);

	mExternalItems = NULL;

	externalDataCount = 0;

	mFocusIndex = -1;

	mSubState = -1;

}

GlxMediaModel::~GlxMediaModel()

{

    //itemadded.clear();

	qDebug("GlxMediaModel::~GlxMediaModel");

	int freeMemory = 0;

	int err1 = HAL::Get( HALData::EMemoryRAMFree, freeMemory );

	qDebug("####mediaModel : Memory available before cache cleanup  = %d and error is = %d ", freeMemory , err1 );

	itemIconCache.clear();

	itemFsIconCache.clear();

	delete m_DefaultIcon;

	m_DefaultIcon = NULL;

	clearExternalItems();

	err1 = HAL::Get( HALData::EMemoryRAMFree, freeMemory );

	qDebug("####mediaModel : Memory available after cache cleanup  = %d and error is = %d ", freeMemory , err1 );

    int err = disconnect(mMLWrapper, SIGNAL(updateIcon(int, HbIcon*)), this, SLOT(itemUpdated1(int, HbIcon*)));

	err = disconnect(mMLWrapper, SIGNAL(itemCorrupted(int)), this, SLOT(itemCorrupted(int)));

	err = disconnect(mMLWrapper, SIGNAL(insertItems(int, int)), this, SLOT(itemsAdded(int, int)));

	err = disconnect(mMLWrapper, SIGNAL(removeItems(int, int)), this, SLOT(itemsRemoved(int, int)));

	err = disconnect(this, SIGNAL(iconAvailable(int, HbIcon*, GlxTBContextType)), this, SLOT(updateItemIcon(int, HbIcon*, GlxTBContextType)));

    delete mMLWrapper;

}

void GlxMediaModel::setContextMode(GlxContextMode contextMode)

{

	if(mContextMode != contextMode)	{

		itemFsIconCache.clear();

		mMLWrapper->setContextMode(contextMode);

		mContextMode = contextMode;

		if ( mContextMode == GlxContextLsGrid || mContextMode == GlxContextPtGrid ) {

            itemIconCache.clear();

            emit dataChanged( index( 0, 0), index( rowCount() - 1, 0) );

        }

	}

}

//to add external data to the model

void GlxMediaModel::addExternalItems(GlxExternalData* externalItems)

{

	externalDataCount = externalItems->count();

	beginInsertRows(QModelIndex(), 0, externalDataCount);

	mExternalItems = externalItems;

	itemExternalIconCache.setMaxCost(15);

	endInsertRows();

	setFocusIndex(index(0,0));

}

/*

*for removing all external image data from the model. 

*/

void GlxMediaModel::clearExternalItems()

{

	beginRemoveRows(QModelIndex(), 0, externalDataCount);

	if(mExternalItems) {

		delete mExternalItems;

		mExternalItems = NULL;

		externalDataCount = 0;

	}

	itemExternalIconCache.clear();

	endRemoveRows();

}

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

{

	Q_UNUSED(parent);

	qDebug("GlxMediaModel::rowCount %d", mMLWrapper->getItemCount());

    return (mMLWrapper->getItemCount() + externalDataCount);

}

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

{

    Q_UNUSED(parent);

    return 1;

}

QModelIndex GlxMediaModel::parent(const QModelIndex &child) const

{

    Q_UNUSED(child);

    //returns always invalid model index

    return QModelIndex();

}

//todo refactor this whole function ... too many return statements are not good

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

{

    HbIcon* itemIcon = NULL;

    int itemIndex = index.row();

    qDebug("GlxMediaModel::data buffer concept index %d role %d", index.row(), role);

    if ((!index.isValid()) || (index.row() > rowCount()-1)) {

         return QVariant();

    }

//external data are always placed at the beginning of the Media List

//Check if the index can be mapped to the external data

//if not then map the index to Ml Index

    if(itemIndex < externalDataCount) {

        if(role == Qt::DecorationRole || role == GlxFsImageRole){

            return *(GetExternalIconItem(itemIndex,GlxTBContextExternal));

        }

    }

    else {

        itemIndex -=  externalDataCount;

    }

//retrieve Data from Media List		

    if (role == Qt::DecorationRole) {

        itemIcon = GetGridIconItem(itemIndex,GlxTBContextGrid);

        if(itemIcon == NULL || itemIcon->isNull() ){

            itemIcon = m_DefaultIcon;

        // }

        }

        return *itemIcon;

    }

    if (role == GlxFsImageRole){

        if(mContextMode == GlxContextLsFs){

            itemIcon = GetFsIconItem(itemIndex,GlxTBContextLsFs);

        }

        else if (mContextMode == GlxContextPtFs){

            itemIcon = GetFsIconItem(itemIndex,GlxTBContextPtFs);

        }

        if ( itemIcon == NULL) {

            //itemIcon = GetGridIconItem(itemIndex,GlxTBContextGrid);    

            HbIcon* tempIcon = GetGridIconItem( itemIndex, GlxTBContextGrid );

            if (tempIcon && !tempIcon->isNull()) {

                qDebug("GlxMediaModel::scaling thumbnail");

                QPixmap tempPixmap = tempIcon->qicon().pixmap(128, 128);

                QSize sz = ( mContextMode == GlxContextLsFs ) ? QSize ( 640, 360) : QSize ( 360, 640 );

                tempPixmap = tempPixmap.scaled(sz, Qt::KeepAspectRatio );

                HbIcon tmp = HbIcon( QIcon(tempPixmap)) ;

				if(!tmp.isNull()){

					return tmp;

				}

            }

        }

        if ( itemIcon == NULL || itemIcon->isNull() ) {

            itemIcon = m_DefaultIcon;

        }

        return *itemIcon;

    }

    QModelIndex idx;

    if ( GlxFocusIndexRole == role ) {

        idx = getFocusIndex();

        return idx.row();

    }

    if(role == GlxUriRole) {

        return (mMLWrapper->retrieveItemUri(itemIndex));

    }

    if(role == GlxDimensionsRole) {

        return (mMLWrapper->retrieveItemDimension(itemIndex));

    }

    if(role == GlxDateRole ) {

    	qDebug("GlxMediaModel::data GlxDateRole ");

    	return (mMLWrapper->retrieveItemDate(itemIndex));

    }

    if (role == GlxFrameCount) {

    qDebug("GlxMediaModel:: GlxFrameCount ");

    return (mMLWrapper->retrieveItemFrameCount(itemIndex));

    }

    }

    return QVariant();

}

//GetGridIconItem

HbIcon* GlxMediaModel::GetGridIconItem(int itemIndex, GlxTBContextType tbContextType) const

{

	HbIcon* itemIcon = itemIconCache[itemIndex];  //Initialize icon from the Cache will be NULL if Item not present

	if (!itemIcon)

	{

		itemIcon =  mMLWrapper->retrieveItemIcon(itemIndex, tbContextType);

		if(itemIcon){

            emit iconAvailable(itemIndex,itemIcon, GlxTBContextGrid);

		}

		itemIcon = itemIconCache[itemIndex];

	}

	return itemIcon;

}

HbIcon* GlxMediaModel::GetFsIconItem(int itemIndex, GlxTBContextType tbContextType) const

{

	HbIcon* itemIcon = itemFsIconCache[itemIndex];  //Initialize icon from the Cache will be NULL if Item not present

	if (!itemIcon) {

		itemIcon =  mMLWrapper->retrieveItemIcon(itemIndex, tbContextType);

		if(itemIcon){

            emit iconAvailable(itemIndex,itemIcon, tbContextType);

		}

		itemIcon = itemFsIconCache[itemIndex];

		/*if(!itemIcon){

		itemIcon = GetGridIconItem(itemIndex, GlxTBContextGrid);

		}*/

	}

	return itemIcon;

}

HbIcon* GlxMediaModel::GetExternalIconItem(int itemIndex,GlxTBContextType tbContextType) const

{

	//todo add asserts here as the cache and the array is not preinitialized

	HbIcon* itemIcon = itemExternalIconCache[itemIndex];  //Initialize icon from the Cache will be NULL if Item not present

	if (!itemIcon) {

		QPixmap* itemPixmap = mExternalItems->at(itemIndex).image;

		itemIcon = new HbIcon(QIcon(*itemPixmap));

		emit iconAvailable(itemIndex,itemIcon, tbContextType);

	}

	return itemIcon;

}

void GlxMediaModel::itemUpdated1(int mlIndex,GlxTBContextType tbContextType  )

{

	qDebug("GlxMediaModel::itemUpdated %d", mlIndex);

	//clear the grid and FS cache if they have any icons with them for that index

	if(tbContextType == GlxTBContextGrid) {

		itemIconCache.remove(mlIndex);

	}

	if(tbContextType == GlxTBContextLsFs || tbContextType == GlxTBContextPtFs) {

		itemFsIconCache.remove(mlIndex);

	}

	emit dataChanged(index(mlIndex+externalDataCount,0),index(mlIndex+externalDataCount,0));

}

void GlxMediaModel::itemCorrupted(int itemIndex)

{

	qDebug("GlxMediaModel::itemCorrupted %d", itemIndex);

	emit dataChanged(index(itemIndex+externalDataCount,0),index(itemIndex+externalDataCount,0));	

}

void GlxMediaModel::itemsAdded(int startIndex, int endIndex)

{

	qDebug("GlxMediaModel::itemsAdded %d %d", startIndex, endIndex);

	mFocusIndex = -1;

	//emit rowsAboutToBeInserted(index(startIndex,0), startIndex, endIndex );

	beginInsertRows(QModelIndex(), startIndex+externalDataCount, endIndex+externalDataCount);

    //itemadded.insert(startIndex,(endIndex - startIndex),NULL );

	itemIconCache.clear();

	itemFsIconCache.clear();

    endInsertRows();

	//emit rowsInserted(index(startIndex,0), startIndex, endIndex );

}

void GlxMediaModel::itemsRemoved(int startIndex, int endIndex)

{

	qDebug("GlxMediaModel::itemsRemoved %d %d", startIndex, endIndex);

	mFocusIndex = -1;

	//emit rowsAboutToBeRemoved(index(startIndex,0), startIndex, endIndex );

	beginRemoveRows(QModelIndex(), startIndex+externalDataCount, endIndex+externalDataCount);

	//itemadded.remove(startIndex,(endIndex - startIndex) );

	itemIconCache.clear();

	itemFsIconCache.clear();

	endRemoveRows();

	//emit rowsRemoved(index(startIndex,0), startIndex, endIndex );

}

void GlxMediaModel::updateItemIcon(int itemIndex, HbIcon* itemIcon, GlxTBContextType tbContextType)

{

	qDebug("GlxMediaModel::updateItemIcon %d", itemIndex);

	if(tbContextType == GlxTBContextGrid){

		itemIconCache.insert(itemIndex, itemIcon);

	}

	else if(tbContextType == GlxTBContextLsFs || tbContextType == GlxTBContextPtFs){

		itemFsIconCache.insert(itemIndex, itemIcon);

	}

	else if (tbContextType == GlxTBContextExternal){

		itemExternalIconCache.insert(itemIndex, itemIcon);	

	}

}

void GlxMediaModel::setFocusIndex(const QModelIndex &index)

{

	qDebug("GlxMediaModel::setFocusIndex%d", index.row());

	int itemIndex = index.row();

	if(itemIndex >=externalDataCount)

	{

		int mlIndex = itemIndex - externalDataCount;

		mMLWrapper->setFocusIndex(mlIndex);

		mFocusIndex = -1;

	}

	else{

		mFocusIndex = itemIndex;

		if(rowCount() > externalDataCount) {

			mMLWrapper->setFocusIndex(0);

		}

	}

}

QModelIndex GlxMediaModel::getFocusIndex() const

{

	int itemIndex = 0;

	//return index(itemIndex+externalDataCount,0);

	if(mFocusIndex == -1){

		int mlIndex = mMLWrapper->getFocusIndex();

		itemIndex = mlIndex + externalDataCount;

	}

	else {

		itemIndex = mFocusIndex;

	}

	return index(itemIndex,0);

}

void GlxMediaModel::setSelectedIndex(const QModelIndex &index)

{

    int itemIndex = index.row();

    qDebug("GlxMediaModel::setSelectedIndex()%d", itemIndex);    

    mMLWrapper->setSelectedIndex(itemIndex);

}

bool GlxMediaModel::setData ( const QModelIndex & idx, const QVariant & value, int role )

{

    Q_UNUSED( idx )

    if ( GlxContextRole == role ) {

        if ( value.isValid() &&  value.canConvert <int> () ) {

            setContextMode( (GlxContextMode) value.value <int> () );

            return TRUE;

        }

    }

    if ( GlxFocusIndexRole == role ) {

        if ( value.isValid() &&  value.canConvert <int> () ) {

            setFocusIndex( index( value.value <int> (), 0) );

            return TRUE;

        }

    }

    if ( GlxVisualWindowIndex == role ) {

        if ( value.isValid() &&  value.canConvert <int> () ) {

            mMLWrapper->setVisibleWindowIndex(  value.value <int> () );

            return TRUE;

        }

    }

    if ( GlxSelectedIndexRole == role ) {

        qDebug("GlxMediaModel::setData::GlxSelectedIndexRole()::BEFORE%d", idx.row());    

        if ( value.isValid() &&  value.canConvert <int> () ) {

        qDebug("GlxMediaModel::setData()::GlxSelectedIndexRole%d", idx.row());    

            setSelectedIndex( index( value.value <int> (), 0) );

            return TRUE;

        }

    }

    if ( role == GlxSubStateRole && value.isValid() &&  value.canConvert <int> ()) {

        mSubState = value.value <int> () ;

        return TRUE;

    }

    return FALSE;

}

QModelIndex GlxMediaModel::index(int row, int column, const QModelIndex &parent) const

{

    Q_UNUSED(parent)

    qDebug("GlxMediaModel::index row %d column %d", row, column);

    if ( ( row < 0 )

        || ( row >= rowCount() )

        || ( column < 0 )

        || ( column >= columnCount() ) ) {

        return QModelIndex();

    }

    return QAbstractItemModel::createIndex(row, column);           

}