/*

 *  Copyright (c) 2007 Jeff Mitchell <kde-dev@emailgoeshere.com>

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 */

#define DEBUG_PREFIX "MediaDeviceCache"

#include "MediaDeviceCache.h"

#include "Amarok.h"

#include "Debug.h"

#include <KConfig>

#include <solid/device.h>

#include <solid/deviceinterface.h>

#include <solid/devicenotifier.h>

#include <solid/opticaldisc.h>

#include <solid/portablemediaplayer.h>

#include <solid/storageaccess.h>

#include <solid/storagedrive.h>

#include <solid/storagevolume.h>

#include <QDir>

#include <QFile>

#include <QList>

MediaDeviceCache* MediaDeviceCache::s_instance = 0;

MediaDeviceCache::MediaDeviceCache() : QObject()

                             , m_type()

                             , m_name()

                             , m_volumes()

{

    DEBUG_BLOCK

    s_instance = this;

    connect( Solid::DeviceNotifier::instance(), SIGNAL( deviceAdded( const QString & ) ),

             this, SLOT( slotAddSolidDevice( const QString & ) ) );

    connect( Solid::DeviceNotifier::instance(), SIGNAL( deviceRemoved( const QString & ) ),

             this, SLOT( slotRemoveSolidDevice( const QString & ) ) );

}

MediaDeviceCache::~MediaDeviceCache()

{

    s_instance = 0;

}

void

MediaDeviceCache::refreshCache()

{

    DEBUG_BLOCK

    m_type.clear();

    m_name.clear();

    QList<Solid::Device> deviceList = Solid::Device::listFromType( Solid::DeviceInterface::PortableMediaPlayer );

    foreach( const Solid::Device &device, deviceList )

    {

        if( device.as<Solid::StorageDrive>() )

        {

            debug() << "Found Solid PMP that is also a StorageDrive, skipping";

            continue;

        }

        debug() << "Found Solid::DeviceInterface::PortableMediaPlayer with udi = " << device.udi();

        debug() << "Device name is = " << device.product() << " and was made by " << device.vendor();

        m_type[device.udi()] = MediaDeviceCache::SolidPMPType;

        m_name[device.udi()] = device.vendor() + " - " + device.product();

    }

    deviceList = Solid::Device::listFromType( Solid::DeviceInterface::StorageAccess );

    foreach( Solid::Device device, deviceList )

    {

        debug() << "Found Solid::DeviceInterface::StorageAccess with udi = " << device.udi();

        debug() << "Device name is = " << device.product() << " and was made by " << device.vendor();

        Solid::StorageAccess* ssa = device.as<Solid::StorageAccess>();

        Solid::OpticalDisc * opt = device.as<Solid::OpticalDisc>();

        if ( opt && opt->availableContent() & Solid::OpticalDisc::Audio )

        {

            m_type[ device.udi() ] = MediaDeviceCache::SolidAudioCdType;

            m_name[ device.udi() ] = device.vendor() + " - " + device.product();

        } 

        else if( ssa )

        {

            if( !m_volumes.contains( device.udi() ) )

            {

                connect( ssa, SIGNAL( accessibilityChanged(bool, const QString&) ),

                    this, SLOT( slotAccessibilityChanged(bool, const QString&) ) );

                m_volumes.append( device.udi() );

            }

            if( ssa->isAccessible() )

            {

                m_type[device.udi()] = MediaDeviceCache::SolidVolumeType;

                m_name[device.udi()] = ssa->filePath();

            }

            else

            {

                debug() << "Solid device is not accessible, will wait until it is to consider it added.";

            }

        }

    }

    KConfigGroup config = Amarok::config( "PortableDevices" );

    QMap<QString, QString> manualDevices = config.entryMap();

    foreach( const QString &udi, manualDevices.keys() )

    {

        if( udi.startsWith( "manual" ) )

        {

            debug() << "Found manual device with udi = " << udi;

            m_type[udi] = MediaDeviceCache::ManualType;

            m_name[udi] = udi.split( '|' )[1];

        }

    }

}

void

MediaDeviceCache::slotAddSolidDevice( const QString &udi )

{

    DEBUG_BLOCK

    Solid::Device device( udi );

    debug() << "Found new Solid device with udi = " << device.udi();

    debug() << "Device name is = " << device.product() << " and was made by " << device.vendor();

    Solid::StorageAccess *ssa = device.as<Solid::StorageAccess>();

    Solid::OpticalDisc * opt = device.as<Solid::OpticalDisc>();

    if( m_type.contains( udi ) )

    {

        debug() << "Duplicate UDI trying to be added: " << udi;

        return;

    }

    if ( opt && opt->availableContent() & Solid::OpticalDisc::Audio )

    {

        debug() << "device is an Audio Cd";

        m_type[udi] = MediaDeviceCache::SolidAudioCdType;

        m_name[udi] = device.vendor() + " - " + device.product();

    }

    else if( device.as<Solid::StorageDrive>() )

    {

        debug() << "Storage drive found, will wait for the volume";

        return;

    }

    else if( ssa )

    {

        debug() << "volume is generic storage";

        if( !m_volumes.contains( device.udi() ) )

        {

            connect( ssa, SIGNAL( accessibilityChanged(bool, const QString&) ),

                this, SLOT( slotAccessibilityChanged(bool, const QString&) ) );

            m_volumes.append( device.udi() );

        }

        if( ssa->isAccessible() )

        {

            m_type[udi] = MediaDeviceCache::SolidVolumeType;

            m_name[udi] = ssa->filePath();

        }

        else

        {

            debug() << "storage volume is not accessible right now, not adding.";

            return;

        }

    }

    else if( device.as<Solid::PortableMediaPlayer>() )

    {

        debug() << "device is a PMP";

        m_type[udi] = MediaDeviceCache::SolidPMPType;

        m_name[udi] = device.vendor() + " - " + device.product();

    }

    else

    {

        debug() << "udi " << udi << " does not describe a portable media player or storage volume";

        return;

    }

    emit deviceAdded( udi );

}

void

MediaDeviceCache::slotRemoveSolidDevice( const QString &udi )

{

    DEBUG_BLOCK

    debug() << "udi is: " << udi;

    Solid::Device device( udi );

    if( m_volumes.contains( udi ) )

    {

        disconnect( device.as<Solid::StorageAccess>(), SIGNAL( accessibilityChanged(bool, const QString&) ),

                    this, SLOT( slotAccessibilityChanged(bool, const QString&) ) );

        m_volumes.removeAll( udi );

        emit deviceRemoved( udi );

    }

    if( m_type.contains( udi ) )

    {

        m_type.remove( udi );

        m_name.remove( udi );

        emit deviceRemoved( udi );

        return;

    }

    debug() << "Odd, got a deviceRemoved at udi " << udi << " but it did not seem to exist in the first place...";

    emit deviceRemoved( udi );

}

void

MediaDeviceCache::slotAccessibilityChanged( bool accessible, const QString &udi )

{

    debug() << "accessibility of device " << udi << " has changed to accessible = " << (accessible ? "true":"false");

    if( accessible )

    {

        Solid::Device device( udi );

        m_type[udi] = MediaDeviceCache::SolidVolumeType;

        Solid::StorageAccess *ssa = device.as<Solid::StorageAccess>();

        if( ssa )

            m_name[udi] = ssa->filePath();

        emit deviceAdded( udi );

        return;

    }

    else

    {

        if( m_type.contains( udi ) )

        {

            m_type.remove( udi );

            m_name.remove( udi );

            emit deviceRemoved( udi );

            return;

        }

        debug() << "Got accessibility changed to false but was not there in the first place...";

    }

    emit accessibilityChanged( accessible, udi );

}

MediaDeviceCache::DeviceType

MediaDeviceCache::deviceType( const QString &udi ) const

{

    if( m_type.contains( udi ) )

    {

        return m_type[udi];

    }

    return MediaDeviceCache::InvalidType;

}

const QString

MediaDeviceCache::deviceName( const QString &udi ) const

{

    if( m_name.contains( udi ) )

    {

        return m_name[udi];

    }

    return "ERR_NO_NAME"; //Should never happen!

}

bool

MediaDeviceCache::isGenericEnabled( const QString &udi ) const

{

    if( m_type[udi] != MediaDeviceCache::SolidVolumeType )

    {

        debug() << "Not SolidVolumeType, returning false";

        return false;

    }

    Solid::Device device( udi );

    Solid::StorageAccess* ssa = device.as<Solid::StorageAccess>();

    if( !ssa || !ssa->isAccessible() )

    {

        debug() << "Not able to convert to StorageAccess or not accessible, returning false";

        return false;

    }

    if( device.parent().as<Solid::PortableMediaPlayer>() )

    {

        debug() << "Could convert parent to PortableMediaPlayer, returning true";

        return true;

    }

    if( QFile::exists( ssa->filePath() + QDir::separator() + ".is_audio_player" ) )

    {

        return true;

    }

    return false;

}

const QString

MediaDeviceCache::volumeMountPoint( const QString &udi ) const

{

    Solid::Device device( udi );

    Solid::StorageAccess* ssa = device.as<Solid::StorageAccess>();

    if( !ssa || !ssa->isAccessible() )

    {

        debug() << "Not able to convert to StorageAccess or not accessible, returning empty";

        return QString();

    }

    return ssa->filePath();

}

#include "MediaDeviceCache.moc"