/*

* 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:

*

*/

// System includes

#include <hbprogressdialog.h>

// User includes

#include "radiofrequencyscanner.h"

#include "radiolocalization.h"

#include "radiouiengine.h"

#include "radiologger.h"

#include "radiostationmodel.h"

// Constants

const int KExtraRoomToMaxValue = 100000;

/*!

 *

 */

RadioFrequencyScanner::RadioFrequencyScanner( RadioUiEngine& uiEngine, QObject* parent ) :

    QObject( parent ),

    mUiEngine( uiEngine ),

    mScanningProgressNote( new HbProgressDialog( HbProgressDialog::ProgressDialog ) ),

    mChannelCount( 0 ),

    mMinFrequency( 0 )

{

    mScanningProgressNote->setModal( true );

    mScanningProgressNote->setAutoClose( true );

    mMinFrequency = mUiEngine.minFrequency();

    // Add some extra to the maximum value to allow room for the station at the low band edge

    mScanningProgressNote->setRange( mMinFrequency, mUiEngine.maxFrequency() + KExtraRoomToMaxValue );

    mScanningProgressNote->setProgressValue( mMinFrequency );

    mScanningProgressNote->setText( TRANSLATE( KProgressTitleScanStations ) );

    RadioStationModel* stationModel = &mUiEngine.model();

    connectAndTest( stationModel,           SIGNAL(stationAdded(RadioStation)),

                    this,                   SLOT(updateScanAndSaveProgress(RadioStation)) );

    connectAndTest( &mUiEngine,             SIGNAL(scanAndSaveFinished()),

                    this,                   SLOT(scanAndSavePresetsFinished()) );

    connectAndTest( mScanningProgressNote,  SIGNAL(cancelled()),

                    this,                   SLOT(scanAndSavePresetsCancelled()) );

}

/*!

 *

 */

void RadioFrequencyScanner::startScanning()

{

    mUiEngine.scanFrequencyBand();

    mScanningProgressNote->show();

}

/*!

 * Private slot

 *

 */

void RadioFrequencyScanner::updateScanAndSaveProgress( const RadioStation& station )

{

    const uint frequency = station.frequency();

    LOG_FORMAT( "RadioFrequencyScanner::updateScanAndSaveProgress frequency: %d", frequency );

    // Check for special case that can happen during scanning.

    // If there is a valid radio station at the low frequency band edge it will be reported last after

    // all of the higher frequencies. We don't update the progress value here because the value would

    // be lower than the previous one. The progress value is set to maximum when the scanner finishes.

    if ( frequency != mMinFrequency ) {

        mScanningProgressNote->setProgressValue( frequency );

    }

    ++mChannelCount;

    mScanningProgressNote->setText( QString( TRANSLATE( KProgressTitleStationsFound ) ).arg( mChannelCount ) );

}

/*!

 * Private slot

 *

 */

void RadioFrequencyScanner::scanAndSavePresetsFinished()

{

    mScanningProgressNote->setProgressValue( mScanningProgressNote->maximum() );

    disconnect( &mUiEngine.model(),     SIGNAL(stationAdded(RadioStation)),

                this,                   SLOT(updateScanAndSaveProgress(RadioStation)) );

    disconnect( &mUiEngine,             SIGNAL(scanAndSaveFinished()),

                this,                   SLOT(scanAndSavePresetsFinished()) );

    emit frequencyScannerFinished();

    mScanningProgressNote->deleteLater();

    deleteLater();

}

/*!

 * Private slot

 *

 */

void RadioFrequencyScanner::scanAndSavePresetsCancelled()

{

    mUiEngine.cancelScanFrequencyBand();

    scanAndSavePresetsFinished();

    mScanningProgressNote = 0;

    mChannelCount = 0;

}