/*
* 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:
*
*  Version     : %version: 7 %
*/
#include <QList>
#include "hglogger.h"
#include "mydataprovider.h"

const int KItemIdRole = Qt::UserRole+1;

const int KThumbnailsPriority = EPriorityLess; //standard priority


MyDataProvider::MyDataProvider(QObject *parent) :
HgDataProviderModel(parent),
mScheduler(new CActiveSchedulerWait()),
mWrapper( new ThumbnailManager() ),
mThumbnailRequestPending(false),
mThumbnailRequestIndex(-1),
mThumbnailRequestID(-1),
mThumbnailsize(ThumbnailManager::ThumbnailMedium),
mMDSLoadInProgress(false),
mMode(0)
{
//    TX_ENTRY
    Q_UNUSED(parent);
    QPixmap defaultPixmap(":/icons/default.png");
    mDefaultIcon.insert(HgDataProviderIconHbIcon, HbIcon(":/icons/default.png"));
    mDefaultIcon.insert(HgDataProviderIconQIcon, QIcon(defaultPixmap));
    mDefaultIcon.insert(HgDataProviderIconQImage, defaultPixmap.toImage());
    mDefaultIcon.insert(HgDataProviderIconQPixmap, defaultPixmap);
    
    QPixmap noIconPixmap(":/icons/noIcon.png");
    mNoIcon.insert(HgDataProviderIconHbIcon, HbIcon(":/icons/noIcon.png"));
    mNoIcon.insert(HgDataProviderIconQIcon, QIcon(noIconPixmap));
    mNoIcon.insert(HgDataProviderIconQImage, noIconPixmap.toImage());
    mNoIcon.insert(HgDataProviderIconQPixmap, noIconPixmap);
    
    mWrapper->setThumbnailSize( mThumbnailsize );
    mWrapper->setQualityPreference( ThumbnailManager::OptimizeForPerformance );

    QObject::connect( mWrapper, SIGNAL(thumbnailReady( QPixmap , void* , int, int ) ),
                      this, SLOT( thumbnailReady( QPixmap , void* , int , int )));
    
    doResetModel(); //will read mds data
}

MyDataProvider::~MyDataProvider()
{
//    TX_ENTRY
    delete mWrapper;
    delete mScheduler;
//    TX_EXIT
}

void MyDataProvider::changeIconSize(ThumbnailManager::ThumbnailSize aThumbnailsize)
{
//    TX_ENTRY
//	we could  remove all icons from cache and put default ones, but probably that would be waste of time, and it's better just to load new icons with correct sizes.
	mThumbnailsize = aThumbnailsize;
	mWrapper->setThumbnailSize( mThumbnailsize );
//    TX_EXIT
}

void MyDataProvider::changeMode(int mode)
{
    if(mMode!=mode){
        mMode = mode;
        resetModel();
    }
}

void MyDataProvider::doRequestData(QList<int> list, bool silent)
{
//    TX_ENTRY
	Q_UNUSED(silent);
//    QString items = "Requested items:";
    int i = 0;
    
	for (int idx=0; idx<list.count(); idx++){
        i = list[idx];
		if (containsRole(i, KItemIdRole) ) {
//            items += QString("%0 ").arg(i);
			mWaitingThumbnails.append(i);
		}
	}
//	TX_LOG_ARGS(items);
	TX_LOG_ARGS( QString("[TEST] Requested items: %0-%1").arg(list[0]).arg(list[list.count()-1]) );
    getNextThumbnail();
//    TX_EXIT
}

void MyDataProvider::getNextThumbnail()
{
//    TX_ENTRY
    if ( !mThumbnailRequestPending && mWaitingThumbnails.count()){
        int i = mWaitingThumbnails.takeFirst();
        if (i >=0 && i < count() && containsRole(i, KItemIdRole)) {
            int id = (data(i, KItemIdRole)).toInt();
            unsigned long int uId = (unsigned long int)id;
            TX_LOG_ARGS(QString("getThumbnail for index:%0 uID:%1").arg(i).arg(uId));
            void *clientData = reinterpret_cast<void *>(i);
            mThumbnailRequestID = mWrapper->getThumbnail(uId, clientData, KThumbnailsPriority);
            mThumbnailRequestIndex = i;
            mThumbnailRequestPending = true;            
        } else {
            updateIcon(i, mNoIcon[iconMode()], true);
            getNextThumbnail();
        }
    }
//    TX_EXIT    
}

void MyDataProvider::readMDSData()
{
    mMDSLoadInProgress = true;
}

void MyDataProvider::thumbnailReady( QPixmap pixmap, void* data, int id, int error )
{
//    TX_ENTRY    
    Q_UNUSED(id);
    int idx = reinterpret_cast<int>(data);
    if (!error && pixmap.rect().height()>0  && pixmap.rect().width()>0 ) {
        TX_LOG_ARGS(QString("thumbnailReady idx = %0").arg(idx));
        updateIcon(idx, createIcon(idx, pixmap));
	} else {
        updateIcon(idx, mNoIcon[iconMode()], true);	    
        TX_LOG_ARGS(QString("error:%0 id:%0").arg(error).arg(idx));
	}
    mThumbnailRequestIndex = -1;
    mThumbnailRequestID = -1;
    mThumbnailRequestPending = false;            
    getNextThumbnail();
//    TX_EXIT
}

void MyDataProvider::doReleaseData(QList<int> list, bool silent)
{
    TX_ENTRY    
    Q_UNUSED(silent);
    int i = 0;
//    QString items = "Released items:";
    for (int idx=0;idx<list.count(); idx++){
        i = list[idx];
        if (mThumbnailRequestPending && mThumbnailRequestIndex==i ){
            TX_LOG_ARGS( QString("Cancel also thumbnail request for item %0").arg(i));
            mWrapper->cancelRequest(mThumbnailRequestID);
            mThumbnailRequestIndex = -1;
            mThumbnailRequestID = -1;
            mThumbnailRequestPending = false;
        }
//        items += QString("%0 ").arg(i);
        mWaitingThumbnails.removeAll(i);
        releasePixmap(i);
    }
//    TX_LOG_ARGS(items);

    getNextThumbnail();
    TX_EXIT        
}

QVariant MyDataProvider::defaultIcon() const
{
    MyDataProvider* me = const_cast<MyDataProvider*>(this);
    return mDefaultIcon[me->iconMode()];
}

void MyDataProvider::HandleSessionOpened(CMdESession& aSession, TInt aError)
{
    Q_UNUSED(aSession);
    Q_UNUSED(aError);	
    mScheduler->AsyncStop();
}

// ----------------------------------------------------------------------------
// HandleQueryCompleted
// ----------------------------------------------------------------------------
//
void MyDataProvider::HandleQueryCompleted(CMdEQuery& aQuery, TInt aError)
{
    Q_UNUSED(aError);	
    clearCache();
    mMDSLoadInProgress = false;
    int size = aQuery.ResultIds().Count();
    
    for(int i = 0; i < size ; i++){
        QList< QPair< QVariant, int > > list;
        unsigned long int id = aQuery.ResultId(i);
        QVariant v;
        v.setValue(id);
        list.append( QPair< QVariant, int >(v, KItemIdRole) );
        int a = count();
        int b = -count();
		int c = a/4 + b/10 + i%30 + i/2;
		QString s = QString("ITEM%1 %2 %3").arg(c).arg(a).arg(b);
		if (i%2){
            s = s.toLower();
		}
        list.append( QPair< QVariant, int >(s, Qt::DisplayRole) );
        list.append( QPair< QVariant, int >(QVariant(a), Qt::UserRole+2) );
        list.append( QPair< QVariant, int >(QVariant(b), Qt::UserRole+3) );
        list.append( QPair< QVariant, int >(QVariant(c), Qt::UserRole+4) );
        
        newItem(&list);
    }
    
    TX_LOG_ARGS( QString("size=%1").arg(count()) );
    
    mScheduler->AsyncStop();
}

void MyDataProvider::doResetModel()
{
    TX_ENTRY
    if (mThumbnailRequestPending && mThumbnailRequestID!=-1){
        mWrapper->cancelRequest(mThumbnailRequestID);
    }
    mThumbnailRequestIndex = -1;
    mThumbnailRequestID = -1;
    mThumbnailRequestPending = false;
    mWaitingThumbnails.clear();
    
    //read MDS data once again
    TRAP_IGNORE(
        CMdESession* session = CMdESession::NewL( *this ); 
        mScheduler->Start();
        
        CMdENamespaceDef& namespaceDef = session->GetDefaultNamespaceDefL();
                
        CMdEObjectQuery* imageQuery;
        if ( mMode == 0){
            CMdEObjectDef& objectDef = namespaceDef.GetObjectDefL(_L("Image"));
            imageQuery = session->NewObjectQueryL( namespaceDef, objectDef, this );
        } else {
            CMdEObjectDef& objectDef = namespaceDef.GetObjectDefL(_L("Audio"));
            imageQuery = session->NewObjectQueryL( namespaceDef, objectDef, this );
        }   
        
        CleanupStack::PushL( imageQuery );
        imageQuery->SetResultMode( EQueryResultModeId );
        imageQuery->FindL( );
        mScheduler->Start();
        CleanupStack::PopAndDestroy( 1 );
        delete session;        
    );    
    
    if ( count() == 0){ //add 2000 items if no media data avilable
        for(int i = 0; i < 2000 ; i++){
            QList< QPair< QVariant, int > > list;
            QString s = QString("ITEM%1").arg(i);
            if (i%2){
                s = s.toLower();
            }
            list.append( QPair< QVariant, int >(s, Qt::DisplayRole) );
            list.append( QPair< QVariant, int >(QVariant(i), Qt::UserRole+2) );        
            newItem(&list);
            newItem();
        }
    }
    TX_EXIT    
}
void MyDataProvider::testRemoveItem(int pos)
{
    TX_ENTRY
    removeItem(pos);
    TX_EXIT  
}

void MyDataProvider::testInsertItem(int pos, QList< QPair< QVariant, int > >* data)
{
    TX_ENTRY
    insertItem(pos, data, false);
    TX_EXIT  
}