/*

* 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

*

*/

//Includes

#include <QDebug>

#include <QTimer>

#include <e32base.h>

#include <hbiconitem.h>

#include <hbpushbutton.h>

#include <hbmainwindow.h>

#include <hbdocumentloader.h>

#include <QAbstractItemModel>

#include <QGesture>

#include <hbpangesture.h>

//User Includes

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

#include "glxmodelparm.h"

#include "glxeffectengine.h"

#include "glxdocloaderdefs.h"

#include "glxslideshowwidget.h"

#include "glxsettinginterface.h"

#include "glxlog.h"

#include "glxtracer.h"

GlxSlideShowWidget::GlxSlideShowWidget( QGraphicsItem *parent ) 

    : HbWidget(parent), 

      mEffectEngine(NULL), 

      mSettings( NULL ),

      mContinueButton(NULL), 

      mItemIndex(1), 

      mSelIndex(0), 

      mSlideTimer(NULL), 

      mModel(NULL)

{

    TRACER("GlxSlideShowWidget::GlxSlideShowWidget()");

    mSettings = GlxSettingInterface::instance() ; //no owner ship

    grabGesture( Qt::PanGesture );

    grabGesture( Qt::TapGesture );

}

void GlxSlideShowWidget::setSlideShowWidget(HbDocumentLoader *DocLoader)

{

    //To:Do error handling

    TRACER("GlxSlideShowWidget::setSlideShowWidget()");   

    //create the effect engine

    mEffectEngine = new GlxEffectEngine();

    // Now load the view and the contents.

    // and then set the play icon to the button

    mContinueButton = static_cast<HbPushButton*>(DocLoader->findWidget(GLXSLIDESHOW_PB));

    mContinueButton->setIcon(HbIcon(GLXICON_PLAY));

    mContinueButton->hide();

    mIsPause = false;

    for ( int i = 0; i < NBR_ITEM ; i++) {

        mIconItems[i]->setAlignment( Qt::AlignCenter );

    }

    mSlideTimer = new QTimer();

    mItemList.clear();    

    //Add the signal-slot for this widget.

    addConnections();

    //Create the settings for the effects 

    mEffectEngine->registerEffect( QString("HbIconItem") );

    //provide the xml info for the effect to take place

    HbEffect::add( QString("HbIconItem"), QString(":/data/transition.fxml"), QString( "Move" ));

    HbEffect::add( QString("HbIconItem"), QString(":/data/transitionleft.fxml"), QString( "LeftMove" ));

    HbEffect::add( QString("HbIconItem"), QString(":/data/transitionright.fxml"), QString( "RightMove" ));

}

GlxSlideShowWidget::~GlxSlideShowWidget()

{

    TRACER("GlxSlideShowWidget::~GlxSlideShowWidget()");

    //Delete the resources allocated

    cleanUp();

    if(mContinueButton) {

        delete mContinueButton;

        mContinueButton = NULL;

    }

}

void GlxSlideShowWidget::cleanUp()

{

    TRACER("GlxSlideShowWidget::cleanUp()");

    removeConnections();

    if(mEffectEngine) {

        mEffectEngine->deRegisterEffect( QString("HbIconItem") );    

        delete mEffectEngine;

        mEffectEngine = NULL;

    }     

    for ( int i = 0; i < NBR_ITEM ; i++) {

        delete mIconItems[i] ;

        mIconItems[i] = NULL;

    }

    if(mSlideTimer) {

        delete mSlideTimer;

        mSlideTimer = NULL;

    }

    clearCurrentModel();

    HbEffect::remove( QString("HbIconItem"), QString(":/data/transition.fxml"), QString( "Move" ));

    HbEffect::remove( QString("HbIconItem"), QString(":/data/transitionleft.fxml"), QString( "LeftMove" ));

    HbEffect::remove( QString("HbIconItem"), QString(":/data/transitionright.fxml"), QString( "RightMove" ));

}

void GlxSlideShowWidget::setModel (QAbstractItemModel *model)

{

    TRACER("GlxSlideShowWidget::setModel()");

    if ( model == mModel ) {

        return ;

    }

    clearCurrentModel();   

    mModel = model;

    initializeNewModel();

    resetSlideShow();

}

void GlxSlideShowWidget::setItemGeometry(QRect screenRect)

{

    TRACER("GlxSlideShowWidget::setItemGeometry()");

    int index = mItemIndex;

    mScreenRect = screenRect;   

    mIconItems[index]->setGeometry(mScreenRect);

    index = ( mItemIndex + 1) % NBR_ITEM;

    mIconItems[index]->setGeometry( QRect( mScreenRect.width(), mScreenRect.top(), mScreenRect.width(), mScreenRect.height() ) );

    index = mItemIndex ? mItemIndex - 1 : NBR_ITEM - 1;    

    mIconItems[index]->setGeometry( QRect( -mScreenRect.width(), mScreenRect.top(), mScreenRect.width(), mScreenRect.height() ) );     

}

void GlxSlideShowWidget::triggeredEffect()

{ 

    TRACER("GlxSlideShowWidget::triggeredEffect()"); 

    int index = mItemIndex;

    mSlideTimer->stop();

    mItemList.clear();

    User::ResetInactivityTime();

    mItemList.append( mIconItems[index] );

    index = ( mItemIndex + 1 ) % NBR_ITEM;

    mItemList.append( mIconItems[index] );

    GLX_LOG_INFO3("GlxSlideShowWidget::triggeredEffect() image selected index %d array index %d index %d", mSelIndex, mItemIndex, index);  

    mEffectEngine->runEffect( mItemList, QString("HbIconItem") );

    emit slideShowEvent( EFFECT_STARTED );

}

void GlxSlideShowWidget::effectFinshed()

{

    TRACER("GlxSlideShowWidget::effectFinshed()");

    //To:Do boundery condition or last item check implemented after behaviour of slide show clear

    int rowCount = mModel->rowCount();

    GLX_LOG_INFO2("GlxSlideShowWidget::effectFinshed() before image selected index %d array index %d", mSelIndex, mItemIndex); 

    mSelIndex = ( ++mSelIndex ) % rowCount;

    mItemIndex = ( ++mItemIndex ) % NBR_ITEM;

    mModel->setData( mModel->index(mSelIndex, 0), mSelIndex, GlxFocusIndexRole );

    mModel->setData( mModel->index(mSelIndex, 0), mSelIndex, GlxVisualWindowIndex );

    setIconItems( MOVE_FORWARD );

    GLX_LOG_INFO2("GlxSlideShowWidget::effectFinshed() after image selected index %d array index %d ", mSelIndex, mItemIndex);

    if ( mIsPause == false ) {

        mSlideTimer->start( mSettings->slideShowDelayTime() );  

    } 

    mItemList.clear();

    emit indexchanged(); // on each item change

}

void GlxSlideShowWidget::cancelEffect()

{

    TRACER("GlxSlideShowWidget::cancelEffect()");

    mEffectEngine->cancelEffect( mItemList );

}

void GlxSlideShowWidget::pauseSlideShow()

{

    TRACER("GlxSlideShowWidget::pauseSlideShow()");

    GLX_LOG_INFO1("GlxSlideShowWidget::pauseSlideShow() %d", this->zValue());

    mIsPause = true;

    mSlideTimer->stop();

    cancelEffect();

    mContinueButton->setZValue( this->zValue() + 2);

    mContinueButton->show() ;

    emit slideShowEvent(UI_ON_EVENT);

}

void GlxSlideShowWidget::continueSlideShow(bool checked)

{

    Q_UNUSED( checked )

    TRACER("GlxSlideShowWidget::continueSlideShow()");

    mIsPause = false;

    if ( mModel &&  mModel->rowCount() > 1 ) {

        mSlideTimer->start( mSettings->slideShowDelayTime() ); 

    }

    mContinueButton->hide(); 

    emit slideShowEvent(UI_OFF_EVENT);

}

void GlxSlideShowWidget::dataChanged(QModelIndex startIndex, QModelIndex endIndex)

{

    Q_UNUSED( endIndex )

    TRACER("GlxSlideShowWidget::dataChanged()");

    GLX_LOG_INFO2("GlxSlideShowWidget::dataChanged startIndex = %d mSelIndex = %d ", startIndex.row(), mSelIndex  );

    int deltaIndex = startIndex.row() - mSelIndex;

    if ( deltaIndex <= 1 && deltaIndex >= -1 ) {

        int index = ( mItemIndex + deltaIndex + NBR_ITEM ) % NBR_ITEM; //calculated the array index in which data sould be updated

        GLX_LOG_INFO2("GlxSlideShowWidget::dataChanged index = %d mSelItemIndex = %d ", index, mItemIndex );

        QVariant variant = mModel->data( startIndex, GlxFsImageRole );

        if ( variant.isValid() &&  variant.canConvert<HbIcon> () ) {

            mIconItems[index]->setIcon ( variant.value<HbIcon>() ) ;

        }

        else {

            mIconItems[index]->setIcon ( HbIcon() ) ; 

        }

    }	

}

void GlxSlideShowWidget::rowsInserted(const QModelIndex &parent, int start, int end)

{

    TRACER("GlxSlideShowWidget::rowsInserted()");

    Q_UNUSED(parent);

    Q_UNUSED(start);

    Q_UNUSED(end);

    resetSlideShow();  

}

void GlxSlideShowWidget::rowsRemoved(const QModelIndex &parent, int start, int end)

{

    TRACER("GlxSlideShowWidget::rowsRemoved()");

    Q_UNUSED(parent);

    Q_UNUSED(start);

    Q_UNUSED(end);

    GLX_LOG_INFO1( "GlxSlideShowWidget::rowsRemoved row count = %d ", mModel->rowCount()  );

    if ( mModel->rowCount() <= 0 ) {

        clearCurrentModel();

        emit slideShowEvent( EMPTY_DATA_EVENT );

    }

    else {

        resetSlideShow();

    }

}

void GlxSlideShowWidget::modelDestroyed()

{

    TRACER("GlxSlideShowWidget::modelDestroyed()");

    clearCurrentModel();

}

void GlxSlideShowWidget::orientationChanged(QRect screenRect)

{

    TRACER("GlxSlideShowWidget::orientationChanged()");

    cancelEffect();

    setItemGeometry( screenRect);

    resetSlideShow();

}

void GlxSlideShowWidget::leftGesture(int value)

{

    Q_UNUSED(value)

    TRACER("GlxSlideShowWidget::leftGesture()");

    int index = ( mItemIndex + 1 ) % NBR_ITEM;

    moveImage( index, mScreenRect.width(), QString("LeftMove"), "leftMoveEffectFinished");

}

void GlxSlideShowWidget::rightGesture(int value)

{

    Q_UNUSED(value)

    TRACER ("GlxSlideShowWidget::rightGesture()");

    int index = mItemIndex ? mItemIndex - 1 : NBR_ITEM - 1;

    moveImage( index, -mScreenRect.width(), QString("RightMove"), "rightMoveEffectFinished"); 

}

void GlxSlideShowWidget::leftMoveEffectFinished( const HbEffect::EffectStatus &status )

{

    Q_UNUSED(status)

    TRACER("GlxSlideShowWidget::leftMoveEffectFinished()");

    GLX_LOG_INFO1("GlxSlideShowWidget::leftMoveEffectFinished() %d status", status.reason);

    int rowCount = mModel->rowCount();

    mSelIndex = ( ++mSelIndex ) % rowCount;

    mItemIndex = ( ++mItemIndex ) % NBR_ITEM;

    mModel->setData( mModel->index(mSelIndex, 0), mSelIndex, GlxFocusIndexRole );

    mModel->setData( mModel->index(mSelIndex, 0), mSelIndex, GlxVisualWindowIndex );

    setIconItems( MOVE_FORWARD );

    startSlideShow();

    emit indexchanged(); // on left swipe

}

void GlxSlideShowWidget::rightMoveEffectFinished( const HbEffect::EffectStatus &status )

{

    Q_UNUSED(status)

    TRACER ( "GlxSlideShowWidget::rightMoveEffectFinished( ) ");

    GLX_LOG_INFO1("GlxSlideShowWidget::rightMoveEffectFinished() %d status", status.reason);

    int rowCount = mModel->rowCount();

    mSelIndex = mSelIndex ? --mSelIndex : rowCount - 1;

    mItemIndex = mItemIndex ? mItemIndex - 1 : NBR_ITEM - 1;

    mModel->setData( mModel->index(mSelIndex, 0), mSelIndex, GlxFocusIndexRole );

    mModel->setData( mModel->index(mSelIndex, 0), mSelIndex, GlxVisualWindowIndex );

    setIconItems( MOVE_BACKWARD );

    startSlideShow();

    emit indexchanged(); // on right swipe

} 

void GlxSlideShowWidget::gestureEvent(QGestureEvent *event)

{  

    if( QTapGesture *gesture = static_cast<QTapGesture *>( event->gesture( Qt::TapGesture ) ) ) {        

        if ( gesture->state() == Qt::GestureFinished ) {

            if ( mIsPause == false ) {

                pauseSlideShow();

            }

            event->accept(gesture);

        }

    }

    if (QPanGesture *panningGesture = qobject_cast<QPanGesture*>(event->gesture(Qt::PanGesture))) {

        HbPanGesture *hbPanGesture = qobject_cast<HbPanGesture *>(panningGesture);

        if ( hbPanGesture ) {

            if( hbPanGesture->state() == Qt::GestureFinished ) {

                QPointF delta( hbPanGesture->sceneDelta() );

                if ( delta.x() > 0 ) {

                    rightGesture( delta.x() );

                }

                else {

                    leftGesture( delta.x() );

                }

            }

            event->accept(panningGesture);

        }

    }

}    

void GlxSlideShowWidget::startSlideShow ( )

{

    TRACER ( "GlxSlideShowWidget::startSlideShow( ) ");

    GLX_LOG_INFO1 ( "GlxSlideShowWidget::startSlideShow( ) is pause %d", mIsPause);    

    if ( mIsPause == false && mModel &&  mModel->rowCount() > 1 ) {

        mSlideTimer->start( mSettings->slideShowDelayTime() );  

    }    

}

void GlxSlideShowWidget::stopSlideShow (  )

{

    TRACER ( "GlxSlideShowWidget::stopSlideShow( ) ");

    cancelEffect();

    mSlideTimer->stop();                

}

void GlxSlideShowWidget::clearCurrentModel()

{

    TRACER ( "GlxSlideShowWidget::clearCurrentModel( ) ");

    if ( mModel ) {

        disconnect( mModel, SIGNAL( dataChanged(QModelIndex,QModelIndex) ), this, SLOT( dataChanged(QModelIndex,QModelIndex) ) );

        disconnect(mModel, SIGNAL(rowsInserted(QModelIndex,int,int)), this, SLOT(rowsInserted(QModelIndex,int,int)));

        disconnect(mModel, SIGNAL(rowsRemoved(QModelIndex,int,int)), this, SLOT(rowsRemoved(QModelIndex,int,int)));

        disconnect(mModel, SIGNAL(destroyed()), this, SLOT( modelDestroyed()));

        mModel = NULL ;

    }

/*

    disconnect(mModel, SIGNAL(destroyed()), this, SLOT(_q_modelDestroyed()));

    disconnect(mModel, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)), this, SLOT(rowsAboutToBeRemoved(QModelIndex,int,int)));

 */	

}

void GlxSlideShowWidget::initializeNewModel()

{

    TRACER("GlxSlideShowWidget::initializeNewModel" );

    if ( mModel ) {

        connect( mModel, SIGNAL( dataChanged(QModelIndex,QModelIndex) ), this, SLOT( dataChanged(QModelIndex,QModelIndex) ) );

        connect(mModel, SIGNAL(rowsInserted(QModelIndex,int,int)), this, SLOT(rowsInserted(QModelIndex,int,int)));

        connect(mModel, SIGNAL(rowsRemoved(QModelIndex,int,int)), this, SLOT(rowsRemoved(QModelIndex,int,int)));

        connect(mModel, SIGNAL(destroyed()), this, SLOT( modelDestroyed()));

    }	

}

void GlxSlideShowWidget::resetSlideShow()

{

    TRACER("GlxSlideShowWidget::resetSlideShow()" );

	if(! mModel) {

		return;

	}

    QVariant variant = mModel->data( mModel->index( mSelIndex, 0 ), GlxFocusIndexRole );

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

        mSelIndex = variant.value<int>() ;

        GLX_LOG_INFO1("GlxSlideShowWidget::resetSlideShow() selected index %d", mSelIndex ); 

    }

    variant = mModel->data( mModel->index( mSelIndex, 0 ), GlxFsImageRole );

    if ( variant.isValid() &&  variant.canConvert<HbIcon> () ) {

        mIconItems[mItemIndex]->setIcon ( variant.value<HbIcon>() ) ; 

    }

    else {

        mIconItems[mItemIndex]->setIcon ( HbIcon() ) ; 

    }

    setIconItems(MOVE_FORWARD);

    setIconItems(MOVE_BACKWARD);

    if ( mIsPause == false && mModel &&  mModel->rowCount() > 1 ) {

        mSlideTimer->start( mSettings->slideShowDelayTime() );  

    }  

}

void GlxSlideShowWidget::setIconItems( int moveDir )

{

    TRACER("GlxSlideShowWidget::setIconItems()");

    int index = 0, itemIndex = 0;

    int rowCount = mModel->rowCount();

    GLX_LOG_INFO1("GlxSlideShowWidget::setIconItems() rowcount %d ", rowCount);

    if ( rowCount == 0 ) {

        return ;

    }

    if ( moveDir == MOVE_FORWARD ) {

        index = ( mSelIndex + 1 ) % rowCount;

        itemIndex = ( mItemIndex + 1) % NBR_ITEM;

    }

    else {

        index = mSelIndex ? mSelIndex - 1 : rowCount - 1;  

        itemIndex = mItemIndex ? mItemIndex - 1 : NBR_ITEM - 1; 

    }

    GLX_LOG_INFO4("GlxSlideShowWidget::setIconItems() image selected index %d array index %d index %d icon index %d", mSelIndex, mItemIndex, index, itemIndex);

    QVariant variant = mModel->data( mModel->index( index, 0 ), GlxFsImageRole );

    if ( variant.isValid() &&  variant.canConvert<HbIcon> () ) {

        mIconItems[itemIndex]->setIcon ( variant.value<HbIcon>() ) ; 

    }

    else {

        mIconItems[itemIndex]->setIcon ( HbIcon() ) ;

    } 

}

void GlxSlideShowWidget::moveImage(int nextIndex, int posX, const QString & move, char * callBack)

{

    TRACER("GlxSlideShowWidget::MoveImage()");

    if ( mModel->rowCount() <= 1 || mEffectEngine->isEffectRuning( mItemList ) ) {

        return ;

    }

    mSlideTimer->stop();

    HbEffect::start( mIconItems[mItemIndex], QString("HbIconItem"), move );

    mIconItems[nextIndex]->setPos( posX, mScreenRect.top());

    mIconItems[nextIndex]->setOpacity(1);

    HbEffect::start(mIconItems[nextIndex], QString("HbIconItem"), QString("Move"), this, callBack );    

}

void GlxSlideShowWidget::addConnections()

{

    TRACER("GlxSlideShowWidget::addConnections()");

    if ( mEffectEngine )  {

        connect( mEffectEngine, SIGNAL( effectFinished() ), this, SLOT( effectFinshed() ) );

    }

    if ( mSlideTimer ) {

        connect( mSlideTimer, SIGNAL(timeout()), this, SLOT( triggeredEffect() ) );

    }

    if ( mContinueButton ) {

        connect( mContinueButton, SIGNAL( clicked(bool) ), this, SLOT( continueSlideShow(bool) ) );

    }