/*
 * This file Copyright (C) 2009-2010 Mnemosyne LLC
 *
 * This file is licensed by the GPL version 2.  Works owned by the
 * Transmission project are granted a special exemption to clause 2(b)
 * so that the bulk of its code can remain under the MIT license.
 * This exemption does not extend to derived works not owned by
 * the Transmission project.
 *
 * $Id$
 */

#include <cassert>
#include <ctime>
#include <iostream>

#include <QCheckBox>
#include <QComboBox>
#include <QDateTime>
#include <QDialogButtonBox>
#include <QDoubleSpinBox>
#include <QEvent>
#include <QFont>
#include <QFontMetrics>
#include <QHBoxLayout>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QLabel>
#include <QLocale>
#include <QPushButton>
#include <QRadioButton>
#include <QResizeEvent>
#include <QSpinBox>
#include <QStyle>
#include <QTabWidget>
#include <QTextBrowser>
#include <QTreeView>
#include <QTreeWidget>
#include <QTreeWidgetItem>
#include <QVBoxLayout>

#include <libtransmission/transmission.h>

#include "details.h"
#include "file-tree.h"
#include "hig.h"
#include "prefs.h"
#include "session.h"
#include "squeezelabel.h"
#include "torrent.h"
#include "torrent-model.h"
#include "utils.h"

class Prefs;
class Session;

/****
*****
****/

namespace
{
    const int REFRESH_INTERVAL_MSEC = 4000;

    enum // peer columns
    {
        COL_LOCK,
        COL_UP,
        COL_DOWN,
        COL_PERCENT,
        COL_STATUS,
        COL_ADDRESS,
        COL_CLIENT,
        N_COLUMNS
    };
}

/***
****
***/

class PeerItem: public QTreeWidgetItem
{
        Peer peer;
        QString collatedAddress;
        QString status;

    public:
        virtual ~PeerItem( ) { }
        PeerItem( const Peer& p ) {
            peer = p;
            int q[4];
            if( sscanf( p.address.toUtf8().constData(), "%d.%d.%d.%d", q+0, q+1, q+2, q+3 ) == 4 )
                collatedAddress.sprintf( "%03d.%03d.%03d.%03d", q[0], q[1], q[2], q[3] );
            else
                collatedAddress = p.address;
        }
    public:
        void refresh( const Peer& p ) { peer = p; }
        void setStatus( const QString& s ) { status = s; }
        virtual bool operator< ( const QTreeWidgetItem & other ) const {
            const PeerItem * i = dynamic_cast<const PeerItem*>(&other);
            QTreeWidget * tw( treeWidget( ) );
            const int column = tw ? tw->sortColumn() : 0;
            switch( column ) {
                case COL_UP: return peer.rateToPeer < i->peer.rateToPeer;
                case COL_DOWN: return peer.rateToClient < i->peer.rateToClient;
                case COL_PERCENT: return peer.progress < i->peer.progress;
                case COL_STATUS: return status < i->status;
                case COL_CLIENT: return peer.clientName < i->peer.clientName;
                case COL_LOCK: return peer.isEncrypted && !i->peer.isEncrypted;
                default: return collatedAddress < i->collatedAddress;
            }
        }
};

/***
****
***/

Details :: Details( Session& session, Prefs& prefs, TorrentModel& model, QWidget * parent ):
    QDialog( parent, Qt::Dialog ),
    mySession( session ),
    myPrefs( prefs ),
    myModel( model ),
    myHavePendingRefresh( false )
{
    QVBoxLayout * layout = new QVBoxLayout( this );

    setWindowTitle( tr( "Torrent Properties" ) );

    QTabWidget * t = new QTabWidget( this );
    QWidget * w;
    t->addTab( w = createInfoTab( ),      tr( "Information" ) );
    myWidgets << w;
    t->addTab( w = createPeersTab( ),     tr( "Peers" ) );
    myWidgets << w;
    t->addTab( w = createTrackerTab( ),   tr( "Tracker" ) );
    myWidgets << w;
    t->addTab( w = createFilesTab( ),     tr( "Files" ) );
    myWidgets << w;
    t->addTab( w = createOptionsTab( ),   tr( "Options" ) );
    myWidgets << w;
    layout->addWidget( t );

    QDialogButtonBox * buttons = new QDialogButtonBox( QDialogButtonBox::Close, Qt::Horizontal, this );
    connect( buttons, SIGNAL(rejected()), this, SLOT(deleteLater()));
    layout->addWidget( buttons );

    connect( &myTimer, SIGNAL(timeout()), this, SLOT(onTimer()));

    onTimer( );
    myTimer.setSingleShot( false );
    myTimer.start( REFRESH_INTERVAL_MSEC );
}

Details :: ~Details( )
{
}

void
Details :: setIds( const QSet<int>& ids )
{
    if( ids == myIds )
        return;

    // stop listening to the old torrents
    foreach( int id, myIds ) {
        const Torrent * tor = myModel.getTorrentFromId( id );
        if( tor )
            disconnect( tor, SIGNAL(torrentChanged(int)), this, SLOT(onTorrentChanged()) );
    }

    myFileTreeView->clear( );

    myIds = ids;

    // listen to the new torrents
    foreach( int id, myIds ) {
        const Torrent * tor = myModel.getTorrentFromId( id );
        if( tor )
            connect( tor, SIGNAL(torrentChanged(int)), this, SLOT(onTorrentChanged()) );
    }

    foreach( QWidget * w, myWidgets )
        w->setEnabled( false );

    onTimer( );
}

/***
****
***/

QString
Details :: timeToStringRounded( int seconds )
{
    if( seconds > 60 ) seconds -= ( seconds % 60 );
    return Utils::timeToString ( seconds );
}

void
Details :: onTimer( )
{
    if( !myIds.empty( ) )
        mySession.refreshExtraStats( myIds );
}

void
Details :: onTorrentChanged( )
{
    if( !myHavePendingRefresh ) {
        myHavePendingRefresh = true;
        QTimer::singleShot( 100, this, SLOT(refresh()));
    }
}


void
Details :: refresh( )
{
    QLocale locale;
    const int n = myIds.size( );
    const bool single = n == 1;
    const QString blank;
    const QFontMetrics fm( fontMetrics( ) );
    QList<const Torrent*> torrents;
    QString string;
    const QString none = tr( "None" );
    const QString mixed = tr( "Mixed" );
    const QString unknown = tr( "Unknown" );

    // build a list of torrents
    foreach( int id, myIds ) {
        const Torrent * tor = myModel.getTorrentFromId( id );
        if( tor )
            torrents << tor;
    }

    ///
    ///  activity tab
    ///

    // myStateLabel
    if( torrents.empty( ) )
        string = none;
    else {
        const tr_torrent_activity activity = torrents[0]->getActivity( );
        string = torrents[0]->activityString( );
        foreach( const Torrent * t, torrents ) {
            if( activity != t->getActivity( ) ) {
                string = mixed;
                break;
            }
        }
    }
    myStateLabel->setText( string );

    // myHaveLabel
    double sizeWhenDone = 0;
    double leftUntilDone = 0;
    double available = 0;
    int64_t haveTotal = 0;
    int64_t haveVerified = 0;
    int64_t haveUnverified = 0;
    int64_t verifiedPieces = 0;
    foreach( const Torrent * t, torrents ) {
        if( t->hasMetadata( ) ) {
            haveTotal += t->haveTotal( );
            haveUnverified += t->haveUnverified( );
            const uint64_t v = t->haveVerified( );
            haveVerified += v;
            verifiedPieces += v / t->pieceSize( );
            sizeWhenDone += t->sizeWhenDone( );
            leftUntilDone += t->leftUntilDone( );
            available += t->sizeWhenDone() - t->leftUntilDone() + t->desiredAvailable();
        }
    }
    if( !haveVerified && !haveUnverified )
        string = none;
    else {
        const double d = 100.0 * ( sizeWhenDone ? ( sizeWhenDone - leftUntilDone ) / sizeWhenDone : 1 );
        QString pct = locale.toString( d, 'f', 2 );
        if( !haveUnverified )
            string = tr( "%1 (%2%)" )
                         .arg( Utils :: sizeToString( haveVerified + haveUnverified ) )
                         .arg( pct );
        else
            string = tr( "%1 (%2%); %3 Unverified" )
                         .arg( Utils :: sizeToString( haveVerified + haveUnverified ) )
                         .arg( pct )
                         .arg( Utils :: sizeToString( haveUnverified ) );
    }
    myHaveLabel->setText( string );

    // myAvailabilityLabel
    if( sizeWhenDone < 1 )
        string = none;
    else
        string.sprintf( "%'.1f%%", ( 100.0 * available ) / sizeWhenDone );
    myAvailabilityLabel->setText( string );

    // myDownloadedLabel
    if( torrents.empty( ) )
        string = none;
    else {
        uint64_t d=0, f=0;
        foreach( const Torrent * t, torrents ) {
            d += t->downloadedEver( );
            f += t->failedEver( );
        }
        const QString dstr = Utils::sizeToString( d );
        const QString fstr = Utils::sizeToString( f );
        if( f )
            string = tr( "%1 (+%2 corrupt)" ).arg( dstr ).arg( fstr );
        else
            string = dstr;
    }
    myDownloadedLabel->setText( string );

    uint64_t sum = 0;
    foreach( const Torrent * t, torrents ) sum += t->uploadedEver( );
    myUploadedLabel->setText( Utils::sizeToString( sum ) );

    double d = 0;
    foreach( const Torrent *t, torrents ) d += t->ratio( );
    myRatioLabel->setText( Utils :: ratioToString( d / n ) );

    const QDateTime qdt_now = QDateTime::currentDateTime( );

    // myRunTimeLabel
    if( torrents.empty( ) )
        string = none;
    else {
        bool allPaused = true;
        QDateTime baseline = torrents[0]->lastStarted( );
        foreach( const Torrent * t, torrents ) {
            if( baseline != t->lastStarted( ) )
                baseline = QDateTime( );
            if( !t->isPaused( ) )
                allPaused = false;
        }
        if( allPaused )
            string = torrents[0]->activityString( );
        else if( baseline.isNull( ) )
            string = mixed;
        else
            string = Utils::timeToString( baseline.secsTo( qdt_now ) );
    }
    myRunTimeLabel->setText( string );


    // myETALabel
    string.clear( );
    if( torrents.empty( ) )
        string = none;
    else {
        int baseline = torrents[0]->getETA( );
        foreach( const Torrent * t, torrents ) {
            if( baseline != t->getETA( ) ) {
                string = mixed;
                break;
            }
        }
        if( string.isEmpty( ) ) {
            if( baseline < 0 )
                string = tr( "Unknown" );
            else
                string = Utils::timeToString( baseline );
       }
    }
    myETALabel->setText( string );


    // myLastActivityLabel
    if( torrents.empty( ) )
        string = none;
    else {
        QDateTime latest = torrents[0]->lastActivity( );
        foreach( const Torrent * t, torrents ) {
            const QDateTime dt = t->lastActivity( );
            if( latest < dt )
                latest = dt;
        }
        const int seconds = latest.secsTo( qdt_now );
        if( seconds < 5 )
            string = tr( "Active now" );
        else
            string = tr( "%1 ago" ).arg( Utils::timeToString( seconds ) );
    }
    myLastActivityLabel->setText( string );


    if( torrents.empty( ) )
        string = none;
    else {
        string = torrents[0]->getError( );
        foreach( const Torrent * t, torrents ) {
            if( string != t->getError( ) ) {
                string = mixed;
                break;
            }
        }
    }
    if( string.isEmpty( ) )
        string = none;
    myErrorLabel->setText( string );


    ///
    /// information tab
    ///

    // mySizeLabel
    if( torrents.empty( ) )
        string = none;
    else {
        int pieces = 0;
        uint64_t size = 0;
        uint32_t pieceSize = torrents[0]->pieceSize( );
        foreach( const Torrent * t, torrents ) {
            pieces += t->pieceCount( );
            size += t->totalSize( );
            if( pieceSize != t->pieceSize( ) )
                pieceSize = 0;
        }
        if( !size )
            string = none;
        else if( pieceSize > 0 )
            string = tr( "%1 (%Ln pieces @ %2)", "", pieces )
                     .arg( Utils::sizeToString( size ) )
                     .arg( Utils::sizeToString( pieceSize ) );
        else
            string = tr( "%1 (%Ln pieces)", "", pieces )
                     .arg( Utils::sizeToString( size ) );
    }
    mySizeLabel->setText( string );

    // myHashLabel
    if( torrents.empty( ) )
        string = none;
    else {
        string = torrents[0]->hashString( );
        foreach( const Torrent * t, torrents ) {
            if( string != t->hashString( ) ) {
                string = mixed;
                break;
            }
        }
    }
    myHashLabel->setText( string );

    // myPrivacyLabel
    if( torrents.empty( ) )
        string = none;
    else {
        bool b = torrents[0]->isPrivate( );
        string = b ? tr( "Private to this tracker -- DHT and PEX disabled" )
                   : tr( "Public torrent" );
        foreach( const Torrent * t, torrents ) {
            if( b != t->isPrivate( ) ) {
                string = mixed;
                break;
            }
        }
    }
    myPrivacyLabel->setText( string );

    // myCommentBrowser
    if( torrents.empty( ) )
        string = none;
    else {
        string = torrents[0]->comment( );
        foreach( const Torrent * t, torrents ) {
            if( string != t->comment( ) ) {
                string = mixed;
                break;
            }
        }
    }
    myCommentBrowser->setText( string );

    // myOriginLabel
    if( torrents.empty( ) )
        string = none;
    else {
        bool mixed_creator=false, mixed_date=false;
        const QString creator = torrents[0]->creator();
        const QString date = torrents[0]->dateCreated().toString();
        foreach( const Torrent * t, torrents ) {
            mixed_creator |= ( creator != t->creator() );
            mixed_date |=  ( date != t->dateCreated().toString() );
        }
        if( mixed_creator && mixed_date )
            string = mixed;
        else if( mixed_date )
            string = tr( "Created by %1" ).arg( creator );
        else if( mixed_creator || creator.isEmpty( ) )
            string = tr( "Created on %1" ).arg( date );
        else
            string = tr( "Created by %1 on %2" ).arg( creator ).arg( date );
    }
    myOriginLabel->setText( string );

    // myLocationLabel
    if( torrents.empty( ) )
        string = none;
    else {
        string = torrents[0]->getPath( );
        foreach( const Torrent * t, torrents ) {
            if( string != t->getPath( ) ) {
                string = mixed;
                break;
            }
        }
    }
    myLocationLabel->setText( string );


    ///
    ///  Options Tab
    ///

    if( !torrents.empty( ) )
    {
        int i;
        const Torrent * baseline = *torrents.begin();
        const Torrent * tor;
        bool uniform;
        bool baselineFlag;
        int baselineInt;

        // mySessionLimitCheck
        uniform = true;
        baselineFlag = baseline->honorsSessionLimits( );
        foreach( tor, torrents ) if( baselineFlag != tor->honorsSessionLimits( ) ) { uniform = false; break; }
        mySessionLimitCheck->setChecked( uniform && baselineFlag );

        // mySingleDownCheck
        uniform = true;
        baselineFlag = baseline->downloadIsLimited( );
        foreach( tor, torrents ) if( baselineFlag != tor->downloadIsLimited( ) ) { uniform = false; break; }
        mySingleDownCheck->setChecked( uniform && baselineFlag );

        // mySingleUpCheck
        uniform = true;
        baselineFlag = baseline->uploadIsLimited( );
        foreach( tor, torrents ) if( baselineFlag != tor->uploadIsLimited( ) ) { uniform = false; break; }
        mySingleUpCheck->setChecked( uniform && baselineFlag );

        // myBandwidthPriorityCombo
        uniform = true;
        baselineInt = baseline->getBandwidthPriority( );
        foreach( tor, torrents ) if ( baselineInt != tor->getBandwidthPriority( ) ) { uniform = false; break; }
        if( uniform )
            i = myBandwidthPriorityCombo->findData( baselineInt );
        else
            i = -1;
        myBandwidthPriorityCombo->blockSignals( true );
        myBandwidthPriorityCombo->setCurrentIndex( i );
        myBandwidthPriorityCombo->blockSignals( false );

        mySingleDownSpin->blockSignals( true );
        mySingleDownSpin->setValue( int(tor->downloadLimit().kbps()) );
        mySingleDownSpin->blockSignals( false );

        mySingleUpSpin->blockSignals( true );
        mySingleUpSpin->setValue( int(tor->uploadLimit().kbps()) );
        mySingleUpSpin->blockSignals( false );

        myPeerLimitSpin->blockSignals( true );
        myPeerLimitSpin->setValue( tor->peerLimit() );
        myPeerLimitSpin->blockSignals( false );

        // ratio radios
        uniform = true;
        baselineInt = tor->seedRatioMode( );
        foreach( tor, torrents ) if( baselineInt != tor->seedRatioMode( ) ) { uniform = false; break; }
        if( !uniform ) {
            mySeedGlobalRadio->setChecked( false );
            mySeedCustomRadio->setChecked( false );
            mySeedForeverRadio->setChecked( false );
        } else {
            QRadioButton * rb;
            switch( baselineInt ) {
                case TR_RATIOLIMIT_GLOBAL:    rb = mySeedGlobalRadio; break;
                case TR_RATIOLIMIT_SINGLE:    rb = mySeedCustomRadio; break;
                case TR_RATIOLIMIT_UNLIMITED: rb = mySeedForeverRadio; break;
            }
            rb->setChecked( true );
        }

        mySeedCustomSpin->blockSignals( true );
        mySeedCustomSpin->setValue( tor->seedRatioLimit( ) );
        mySeedCustomSpin->blockSignals( false );
    }

    // tracker tab
    //
    QMap<QString,QTreeWidgetItem*> trackers2;
    QList<QTreeWidgetItem*> newItems2;
    const time_t now( time( 0 ) );
    const bool showBackup = myPrefs.getBool( Prefs::SHOW_BACKUP_TRACKERS );
    const bool showScrape = myPrefs.getBool( Prefs::SHOW_TRACKER_SCRAPES );
    foreach( const Torrent * t, torrents )
    {
        const QString idStr( QString::number( t->id( ) ) );
        TrackerStatsList trackerStats = t->trackerStats( );

        foreach( const TrackerStat& trackerStat, trackerStats )
        {
            const QString key( idStr + ":" + QString::number(trackerStat.id) );
            QTreeWidgetItem * item = (QTreeWidgetItem*) myTrackerStats.value( key, 0 );
            QString str;

            if( item == 0 ) // new tracker
            {
                item = new QTreeWidgetItem( myTrackerTree );
                newItems2 << item;
            }
            str = trackerStat.host;
            if( showBackup || !trackerStat.isBackup)
            {
                if( trackerStat.hasAnnounced )
                {
                    const QString tstr( timeToStringRounded( now - trackerStat.lastAnnounceTime ) );
                    str += "\n";
                    if( trackerStat.lastAnnounceSucceeded )
                    {
                        str += tr( "Got a list of %1 peers %2 ago" )
                            .arg( trackerStat.lastAnnouncePeerCount )
                            .arg( tstr );
                    }
                    else if( trackerStat.lastAnnounceTimedOut )
                    {
                        str += tr( "Peer list request timed out %1 ago; will retry" )
                            .arg( tstr );
                    }
                    else
                    {
                        str += tr( "Got an error %1 ago" )
                            .arg( tstr );
                    }
                }
                switch( trackerStat.announceState )
                {
                    case TR_TRACKER_INACTIVE:
                        if( trackerStat.hasAnnounced )
                        {
                            str += "\n";
                            str += tr( "No updates scheduled" );
                        }
                        break;
                    case TR_TRACKER_WAITING:
                        {
                            const QString tstr( timeToStringRounded( trackerStat.nextAnnounceTime - now ) );
                            str += "\n";
                            str += tr( "Asking for more peers in %1" )
                                .arg( tstr );
                        }
                        break;
                    case TR_TRACKER_QUEUED:
                        str += "\n";
                        str += tr( "Queued to ask for more peers" );
                        break;
                    case TR_TRACKER_ACTIVE:
                        {
                            const QString tstr( timeToStringRounded( now - trackerStat.lastAnnounceStartTime ) );
                            str += "\n";
                            str += tr( "Asking for more peers now... %1" )
                                .arg( tstr );
                        }
                        break;
                }
                if( showScrape )
                {
                    if( trackerStat.hasScraped )
                    {
                        const QString tstr( timeToStringRounded( now - trackerStat.lastScrapeTime ) );
                        str += "\n";
                        if( trackerStat.lastScrapeSucceeded )
                        {
                            str += tr( "Tracker had %1 seeders and %2 leechers %3 ago" )
                                .arg( trackerStat.seederCount )
                                .arg( trackerStat.leecherCount )
                                .arg( tstr );
                        }
                        else
                        {
                            str += tr( "Got a scrape error %1 ago" )
                                .arg( tstr );
                        }
                    }
                    switch( trackerStat.scrapeState )
                    {
                        case TR_TRACKER_INACTIVE:
                            break;
                        case TR_TRACKER_WAITING:
                            {
                                const QString tstr( timeToStringRounded( trackerStat.nextScrapeTime - now ) );
                                str += "\n";
                                str += tr( "Asking for peer counts in %1" )
                                    .arg( tstr );
                            }
                            break;
                        case TR_TRACKER_QUEUED:
                            str += "\n";
                            str += tr( "Queued to ask for peer counts" );
                            break;
                        case TR_TRACKER_ACTIVE:
                            {
                                const QString tstr( timeToStringRounded( now - trackerStat.lastScrapeStartTime ) );
                                str += "\n";
                                str += tr( "Asking for peer counts now... %1" )
                                    .arg( tstr );
                            }
                            break;
                    }
                }
            }

            item->setText( 0, str );

            trackers2.insert( key, item );
        }
    }
    myTrackerTree->addTopLevelItems( newItems2 );
    foreach( QString key, myTrackerStats.keys() ) {
        if( !trackers2.contains( key ) ) { // tracker has disappeared
            QTreeWidgetItem * item = myTrackerStats.value( key, 0 );
            myTrackerTree->takeTopLevelItem( myTrackerTree->indexOfTopLevelItem( item ) );
            delete item;
        }
    }
    myTrackerStats = trackers2;

    ///
    ///  Peers tab
    ///

    QMap<QString,QTreeWidgetItem*> peers2;
    QList<QTreeWidgetItem*> newItems;
    foreach( const Torrent * t, torrents )
    {
        const QString idStr( QString::number( t->id( ) ) );
        PeerList peers = t->peers( );

        foreach( const Peer& peer, peers )
        {
            const QString key = idStr + ":" + peer.address;
            PeerItem * item = (PeerItem*) myPeers.value( key, 0 );

            if( item == 0 ) // new peer has connected
            {
                static const QIcon myEncryptionIcon( ":/icons/encrypted.png" );
                static const QIcon myEmptyIcon;
                item = new PeerItem( peer );
                item->setTextAlignment( COL_UP, Qt::AlignRight );
                item->setTextAlignment( COL_DOWN, Qt::AlignRight );
                item->setTextAlignment( COL_PERCENT, Qt::AlignRight );
                item->setIcon( COL_LOCK, peer.isEncrypted ? myEncryptionIcon : myEmptyIcon );
                item->setToolTip( COL_LOCK, peer.isEncrypted ? tr( "Encrypted connection" ) : "" );
                item->setText( COL_ADDRESS, peer.address );
                item->setText( COL_CLIENT, peer.clientName );
                newItems << item;
            }

            QString code;
            if( peer.isDownloadingFrom )                           { code += 'D'; }
            else if( peer.clientIsInterested )                     { code += 'd'; }
            if( peer.isUploadingTo )                               { code += 'U'; }
            else if( peer.peerIsInterested )                       { code += 'u'; }
            if( !peer.clientIsChoked && !peer.clientIsInterested ) { code += 'K'; }
            if( !peer.peerIsChoked && !peer.peerIsInterested )     { code += '?'; }
            if( peer.isEncrypted )                                 { code += 'E'; }
            if( peer.isIncoming )                                  { code += 'I'; }
            item->setStatus( code );
            item->refresh( peer );

            QString codeTip;
            foreach( QChar ch, code ) {
                QString txt;
                switch( ch.toAscii() ) {
                    case 'O': txt = tr( "Optimistic unchoke" ); break;
                    case 'D': txt = tr( "Downloading from this peer" ); break;
                    case 'd': txt = tr( "We would download from this peer if they would let us" ); break;
                    case 'U': txt = tr( "Uploading to peer" ); break;
                    case 'u': txt = tr( "We would upload to this peer if they asked" ); break;
                    case 'K': txt = tr( "Peer has unchoked us, but we're not interested" ); break;
                    case '?': txt = tr( "We unchoked this peer, but they're not interested" ); break;
                    case 'E': txt = tr( "Encrypted connection" ); break;
                    case 'X': txt = tr( "Peer was discovered through Peer Exchange (PEX)" ); break;
                    case 'I': txt = tr( "Peer is an incoming connection" ); break;
                }
                if( !txt.isEmpty( ) )
                    codeTip += QString("%1: %2\n").arg(ch).arg(txt);
            }

            if( !codeTip.isEmpty() )
                codeTip.resize( codeTip.size()-1 ); // eat the trailing linefeed

            item->setText( COL_UP, peer.rateToPeer.isZero() ? "" : Utils::speedToString( peer.rateToPeer ) );
            item->setText( COL_DOWN, peer.rateToClient.isZero() ? "" : Utils::speedToString( peer.rateToClient ) );
            item->setText( COL_PERCENT, peer.progress > 0 ? QString( "%1%" ).arg( locale.toString((int)(peer.progress*100.0))) : "" );
            item->setText( COL_STATUS, code );
            item->setToolTip( COL_STATUS, codeTip );

            peers2.insert( key, item );
        }
    }
    myPeerTree->addTopLevelItems( newItems );
    foreach( QString key, myPeers.keys() ) {
        if( !peers2.contains( key ) ) { // old peer has disconnected
            QTreeWidgetItem * item = myPeers.value( key, 0 );
            myPeerTree->takeTopLevelItem( myPeerTree->indexOfTopLevelItem( item ) );
            delete item;
        }
    }
    myPeers = peers2;

    if( single )
        myFileTreeView->update( torrents[0]->files( ) );
    else
        myFileTreeView->clear( );

    myHavePendingRefresh = false;
    foreach( QWidget * w, myWidgets )
        w->setEnabled( true );
}

void
Details :: enableWhenChecked( QCheckBox * box, QWidget * w )
{
    connect( box, SIGNAL(toggled(bool)), w, SLOT(setEnabled(bool)) );
    w->setEnabled( box->isChecked( ) );
}


/***
****
***/

QWidget *
Details :: createInfoTab( )
{
    HIG * hig = new HIG( this );

    hig->addSectionTitle( tr( "Activity" ) );
    hig->addRow( tr( "Torrent size:" ), mySizeLabel = new SqueezeLabel );
    hig->addRow( tr( "Have:" ), myHaveLabel = new SqueezeLabel );
    hig->addRow( tr( "Availability:" ), myAvailabilityLabel = new SqueezeLabel );
    hig->addRow( tr( "Downloaded:" ), myDownloadedLabel = new SqueezeLabel );
    hig->addRow( tr( "Uploaded:" ), myUploadedLabel = new SqueezeLabel );
    hig->addRow( tr( "Ratio:" ), myRatioLabel = new SqueezeLabel );
    hig->addRow( tr( "State:" ), myStateLabel = new SqueezeLabel );
    hig->addRow( tr( "Running time:" ), myRunTimeLabel = new SqueezeLabel );
    hig->addRow( tr( "Remaining time:" ), myETALabel = new SqueezeLabel );
    hig->addRow( tr( "Last activity:" ), myLastActivityLabel = new SqueezeLabel );
    hig->addRow( tr( "Error:" ), myErrorLabel = new SqueezeLabel );
    hig->addSectionDivider( );

    hig->addSectionDivider( );
    hig->addSectionTitle( tr( "Details" ) );
    hig->addRow( tr( "Location:" ), myLocationLabel = new SqueezeLabel );
    hig->addRow( tr( "Hash:" ), myHashLabel = new SqueezeLabel );
    hig->addRow( tr( "Privacy:" ), myPrivacyLabel = new SqueezeLabel );
    hig->addRow( tr( "Origin:" ), myOriginLabel = new SqueezeLabel );
    hig->addRow( tr( "Comment:" ), myCommentBrowser = new QTextBrowser );
    const int h = QFontMetrics(myCommentBrowser->font()).lineSpacing() * 4;
    myCommentBrowser->setMinimumHeight( h );
    myCommentBrowser->setMaximumHeight( h );

    hig->finish( );

    return hig;
}

/***
****
***/

void
Details :: onShowBackupTrackersToggled( bool val )
{
    myPrefs.set( Prefs::SHOW_BACKUP_TRACKERS, val );
}

void
Details :: onShowTrackerScrapesToggled( bool val )
{
    myPrefs.set( Prefs::SHOW_TRACKER_SCRAPES, val );
}

void
Details :: onHonorsSessionLimitsToggled( bool val )
{
    mySession.torrentSet( myIds, "honorsSessionLimits", val );
}
void
Details :: onDownloadLimitedToggled( bool val )
{
    mySession.torrentSet( myIds, "downloadLimited", val );
}
void
Details :: onDownloadLimitChanged( int val )
{
    mySession.torrentSet( myIds, "downloadLimit", val );
}
void
Details :: onUploadLimitedToggled( bool val )
{
    mySession.torrentSet( myIds, "uploadLimited", val );
}
void
Details :: onUploadLimitChanged( int val )
{
    mySession.torrentSet( myIds, "uploadLimit", val );
}

#define RATIO_KEY "seedRatioMode"

void
Details :: onSeedUntilChanged( bool b )
{
    if( b )
        mySession.torrentSet( myIds, RATIO_KEY, sender()->property(RATIO_KEY).toInt() );
}

void
Details :: onSeedRatioLimitChanged( double val )
{
    QSet<int> ids;

    foreach( int id, myIds ) {
        const Torrent * tor = myModel.getTorrentFromId( id );
        if( tor && tor->seedRatioLimit( ) )
            ids.insert( id );
    }

    if( !ids.empty( ) )
        mySession.torrentSet( ids, "seedRatioLimit", val );
}

void
Details :: onMaxPeersChanged( int val )
{
    mySession.torrentSet( myIds, "peer-limit", val );
}

void
Details :: onBandwidthPriorityChanged( int index )
{
    if( index != -1 )
    {
        const int priority = myBandwidthPriorityCombo->itemData(index).toInt( );
        mySession.torrentSet( myIds, "bandwidthPriority", priority );
    }
}

QWidget *
Details :: createOptionsTab( )
{
    //QWidget * l;
    QSpinBox * s;
    QCheckBox * c;
    QComboBox * m;
    QHBoxLayout * h;
    QRadioButton * r;
    QDoubleSpinBox * ds;

    HIG * hig = new HIG( this );
    hig->addSectionTitle( tr( "Speed" ) );

    c = new QCheckBox( tr( "Honor global &limits" ) );
    mySessionLimitCheck = c;
    hig->addWideControl( c );
    connect( c, SIGNAL(clicked(bool)), this, SLOT(onHonorsSessionLimitsToggled(bool)) );

    c = new QCheckBox( tr( "Limit &download speed (KB/s):" ) );
    mySingleDownCheck = c;
    s = new QSpinBox( );
    mySingleDownSpin = s;
    s->setRange( 0, INT_MAX );
    hig->addRow( c, s );
    enableWhenChecked( c, s );
    connect( c, SIGNAL(clicked(bool)), this, SLOT(onDownloadLimitedToggled(bool)) );
    connect( s, SIGNAL(valueChanged(int)), this, SLOT(onDownloadLimitChanged(int)));

    c = new QCheckBox( tr( "Limit &upload speed (KB/s):" ) );
    mySingleUpCheck = c;
    s = new QSpinBox( );
    mySingleUpSpin = s;
    s->setRange( 0, INT_MAX );
    hig->addRow( c, s );
    enableWhenChecked( c, s );
    connect( c, SIGNAL(clicked(bool)), this, SLOT(onUploadLimitedToggled(bool)) );
    connect( s, SIGNAL(valueChanged(int)), this, SLOT(onUploadLimitChanged(int)));

    m = new QComboBox;
    m->addItem( tr( "High" ),   TR_PRI_HIGH );
    m->addItem( tr( "Normal" ), TR_PRI_NORMAL );
    m->addItem( tr( "Low" ),    TR_PRI_LOW );
    connect( m, SIGNAL(currentIndexChanged(int)), this, SLOT(onBandwidthPriorityChanged(int)));
    hig->addRow( tr( "Torrent &priority:" ), m );
    myBandwidthPriorityCombo = m;

    hig->addSectionDivider( );
    hig->addSectionTitle( tr( "Seed-Until Ratio" ) );

    r = new QRadioButton( tr( "Use &global settings" ) );
    r->setProperty( RATIO_KEY, TR_RATIOLIMIT_GLOBAL );
    connect( r, SIGNAL(clicked(bool)), this, SLOT(onSeedUntilChanged(bool)));
    mySeedGlobalRadio = r;
    hig->addWideControl( r );

    r = new QRadioButton( tr( "Seed &regardless of ratio" ) );
    r->setProperty( RATIO_KEY, TR_RATIOLIMIT_UNLIMITED );
    connect( r, SIGNAL(clicked(bool)), this, SLOT(onSeedUntilChanged(bool)));
    mySeedForeverRadio = r;
    hig->addWideControl( r );

    h = new QHBoxLayout( );
    h->setSpacing( HIG :: PAD );
    r = new QRadioButton( tr( "&Seed torrent until its ratio reaches:" ) );
    r->setProperty( RATIO_KEY, TR_RATIOLIMIT_SINGLE );
    connect( r, SIGNAL(clicked(bool)), this, SLOT(onSeedUntilChanged(bool)));
    mySeedCustomRadio = r;
    h->addWidget( r );
    ds = new QDoubleSpinBox( );
    ds->setRange( 0.5, INT_MAX );
    connect( ds, SIGNAL(valueChanged(double)), this, SLOT(onSeedRatioLimitChanged(double)));
    mySeedCustomSpin = ds;
    h->addWidget( ds );
    hig->addWideControl( h );

    hig->addSectionDivider( );
    hig->addSectionTitle( tr( "Peer Connections" ) );

    s = new QSpinBox( );
    s->setRange( 1, 300 );
    connect( s, SIGNAL(valueChanged(int)), this, SLOT(onMaxPeersChanged(int)));
    myPeerLimitSpin = s;
    hig->addRow( tr( "&Maximum peers:" ), s );

    hig->finish( );

    return hig;
}

/***
****
***/

QWidget *
Details :: createTrackerTab( )
{
    QCheckBox * c;
    QWidget * top = new QWidget;
    QVBoxLayout * v = new QVBoxLayout( top );

    v->setSpacing( HIG :: PAD_BIG );
    v->setContentsMargins( HIG::PAD_BIG, HIG::PAD_BIG, HIG::PAD_BIG, HIG::PAD_BIG );

    QStringList headers;
    headers << tr("Trackers");
    myTrackerTree = new QTreeWidget;
    myTrackerTree->setHeaderLabels( headers );
    myTrackerTree->setSelectionMode( QTreeWidget::NoSelection );
    myTrackerTree->setRootIsDecorated( false );
    myTrackerTree->setTextElideMode( Qt::ElideRight );
    myTrackerTree->setAlternatingRowColors( true );
    v->addWidget( myTrackerTree, 1 );

    c = new QCheckBox( tr( "Show &more details" ) );
    c->setChecked( myPrefs.getBool( Prefs::SHOW_TRACKER_SCRAPES ) );
    myShowTrackerScrapesCheck = c;
    v->addWidget( c, 1 );
    connect( c, SIGNAL(clicked(bool)), this, SLOT(onShowTrackerScrapesToggled(bool)) );

    c = new QCheckBox( tr( "Show &backup trackers" ) );
    c->setChecked( myPrefs.getBool( Prefs::SHOW_BACKUP_TRACKERS ) );
    myShowBackupTrackersCheck = c;
    v->addWidget( c, 1 );
    connect( c, SIGNAL(clicked(bool)), this, SLOT(onShowBackupTrackersToggled(bool)) );

    return top;
}

/***
****
***/

QWidget *
Details :: createPeersTab( )
{
    QWidget * top = new QWidget;
    QVBoxLayout * v = new QVBoxLayout( top );
    v->setSpacing( HIG :: PAD_BIG );
    v->setContentsMargins( HIG::PAD_BIG, HIG::PAD_BIG, HIG::PAD_BIG, HIG::PAD_BIG );

    QStringList headers;
    headers << QString() << tr("Up") << tr("Down") << tr("%") << tr("Status") << tr("Address") << tr("Client");
    myPeerTree = new QTreeWidget;
    myPeerTree->setUniformRowHeights( true );
    myPeerTree->setHeaderLabels( headers );
    myPeerTree->setColumnWidth( 0, 20 );
    myPeerTree->setSortingEnabled( true );
    myPeerTree->setRootIsDecorated( false );
    myPeerTree->setTextElideMode( Qt::ElideRight );
    v->addWidget( myPeerTree, 1 );

    const QFontMetrics m( font( ) );
    QSize size = m.size( 0, "1024 MB/s" );
    myPeerTree->setColumnWidth( COL_UP, size.width( ) );
    myPeerTree->setColumnWidth( COL_DOWN, size.width( ) );
    size = m.size( 0, " 100% " );
    myPeerTree->setColumnWidth( COL_PERCENT, size.width( ) );
    size = m.size( 0, "ODUK?EXI" );
    myPeerTree->setColumnWidth( COL_STATUS, size.width( ) );
    size = m.size( 0, "888.888.888.888" );
    myPeerTree->setColumnWidth( COL_ADDRESS, size.width( ) );
    size = m.size( 0, "Some BitTorrent Client" );
    myPeerTree->setColumnWidth( COL_CLIENT, size.width( ) );
    myPeerTree->setAlternatingRowColors( true );

    return top;
}

/***
****
***/

QWidget *
Details :: createFilesTab( )
{
    myFileTreeView = new FileTreeView( );

    connect( myFileTreeView, SIGNAL(      priorityChanged(const QSet<int>&, int)),
             this,           SLOT(  onFilePriorityChanged(const QSet<int>&, int)));

    connect( myFileTreeView, SIGNAL(      wantedChanged(const QSet<int>&, bool)),
             this,           SLOT(  onFileWantedChanged(const QSet<int>&, bool)));

    return myFileTreeView;
}

void
Details :: onFilePriorityChanged( const QSet<int>& indices, int priority )
{
    QString key;
    switch( priority ) {
        case TR_PRI_LOW:   key = "priority-low"; break;
        case TR_PRI_HIGH:  key = "priority-high"; break;
        default:           key = "priority-normal"; break;
    }
    mySession.torrentSet( myIds, key, indices.toList( ) );
}

void
Details :: onFileWantedChanged( const QSet<int>& indices, bool wanted )
{
    QString key( wanted ? "files-wanted" : "files-unwanted" );
    mySession.torrentSet( myIds, key, indices.toList( ) );
}