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#include "qplatformdefs.h"

#include "q3ftp.h"

#ifndef QT_NO_NETWORKPROTOCOL_FTP

#include "q3socket.h"

#include "q3socketdevice.h"

#include "qurlinfo.h"

#include "q3urloperator.h"

#include "qstringlist.h"

#include "qregexp.h"

#include "qtimer.h"

#include "qfileinfo.h"

#include "q3ptrdict.h"

#include "q3cstring.h"

#include "qcoreapplication.h"

#include "qftp.h"

#ifndef QT_NO_TEXTCODEC

#include "qtextcodec.h"

#endif

QT_BEGIN_NAMESPACE

//#define Q3FTPPI_DEBUG

//#define Q3FTPDTP_DEBUG

class Q3FtpPI;

class Q3FtpDTP : public QObject

{

    Q_OBJECT

public:

    enum ConnectState {

	CsHostFound,

	CsConnected,

	CsClosed,

	CsHostNotFound,

	CsConnectionRefused

    };

    Q3FtpDTP( Q3FtpPI *p, QObject *parent=0, const char *name=0 );

    void setData( QByteArray * );

    void setDevice( QIODevice * );

    void writeData();

    void setBytesTotal( int bytes )

    {

	bytesTotal = bytes;

	bytesDone = 0;

	emit dataTransferProgress( bytesDone, bytesTotal );

    }

    bool hasError() const;

    QString errorMessage() const;

    void clearError();

    void connectToHost( const QString & host, Q_UINT16 port )

    { socket.connectToHost( host, port ); }

    Q3Socket::State socketState() const

    { return socket.state(); }

    Q_ULONG bytesAvailable() const

    { return socket.bytesAvailable(); }

    Q_LONG readBlock( char *data, Q_ULONG maxlen )

    {

	Q_LONG read = socket.readBlock( data, maxlen );

	bytesDone += read;

	return read;

    }

    QByteArray readAll()

    {

	QByteArray tmp = socket.readAll();

	bytesDone += tmp.size();

	return tmp;

    }

    void abortConnection();

    static bool parseDir( const QString &buffer, const QString &userName, QUrlInfo *info );

signals:

    void listInfo( const QUrlInfo& );

    void readyRead();

    void dataTransferProgress( int, int );

    void connectState( int );

private slots:

    void socketConnected();

    void socketReadyRead();

    void socketError( int );

    void socketConnectionClosed();

    void socketBytesWritten( int );

private:

    void clearData()

    {

	is_ba = false;

	data.dev = 0;

    }

    Q3Socket socket;

    Q3FtpPI *pi;

    QString err;

    int bytesDone;

    int bytesTotal;

    bool callWriteData;

    // If is_ba is true, ba is used; ba is never 0.

    // Otherwise dev is used; dev can be 0 or not.

    union {

	QByteArray *ba;

	QIODevice *dev;

    } data;

    bool is_ba;

};

class Q3FtpPI : public QObject

{

    Q_OBJECT

public:

    Q3FtpPI( QObject *parent = 0 );

    void connectToHost( const QString &host, Q_UINT16 port );

    bool sendCommands( const QStringList &cmds );

    bool sendCommand( const QString &cmd )

    { return sendCommands( QStringList( cmd ) ); }

    void clearPendingCommands();

    void abort();

    QString currentCommand() const

    { return currentCmd; }

    bool rawCommand;

    Q3FtpDTP dtp; // the PI has a DTP which is not the design of RFC 959, but it

		 // makes the design simpler this way

signals:

    void connectState( int );

    void finished( const QString& );

    void error( int, const QString& );

    void rawFtpReply( int, const QString& );

private slots:

    void hostFound();

    void connected();

    void connectionClosed();

    void delayedCloseFinished();

    void readyRead();

    void error( int );

    void dtpConnectState( int );

private:

    // the states are modelled after the generalized state diagram of RFC 959,

    // page 58

    enum State {

	Begin,

	Idle,

	Waiting,

	Success,

	Failure

    };

    enum AbortState {

	None,

	AbortStarted,

	WaitForAbortToFinish

    };

    bool processReply();

    bool startNextCmd();

    Q3Socket commandSocket;

    QString replyText;

    signed char replyCode[3];

    State state;

    AbortState abortState;

    QStringList pendingCommands;

    QString currentCmd;

    bool waitForDtpToConnect;

    bool waitForDtpToClose;

};

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

 *

 * Q3FtpCommand implemenatation

 *

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

class Q3FtpCommand

{

public:

    Q3FtpCommand( Q3Ftp::Command cmd, QStringList raw );

    Q3FtpCommand( Q3Ftp::Command cmd, QStringList raw, const QByteArray &ba );

    Q3FtpCommand( Q3Ftp::Command cmd, QStringList raw, QIODevice *dev );

    ~Q3FtpCommand();

    int id;

    Q3Ftp::Command command;

    QStringList rawCmds;

    // If is_ba is true, ba is used; ba is never 0.

    // Otherwise dev is used; dev can be 0 or not.

    union {

	QByteArray *ba;

	QIODevice *dev;

    } data;

    bool is_ba;

    static int idCounter;

};

int Q3FtpCommand::idCounter = 0;

Q3FtpCommand::Q3FtpCommand( Q3Ftp::Command cmd, QStringList raw )

    : command(cmd), rawCmds(raw), is_ba(false)

{

    id = ++idCounter;

    data.dev = 0;

}

Q3FtpCommand::Q3FtpCommand( Q3Ftp::Command cmd, QStringList raw, const QByteArray &ba )

    : command(cmd), rawCmds(raw), is_ba(true)

{

    id = ++idCounter;

    data.ba = new QByteArray( ba );

}

Q3FtpCommand::Q3FtpCommand( Q3Ftp::Command cmd, QStringList raw, QIODevice *dev )

    : command(cmd), rawCmds(raw), is_ba(false)

{

    id = ++idCounter;

    data.dev = dev;

}

Q3FtpCommand::~Q3FtpCommand()

{

    if ( is_ba )

	delete data.ba;

}

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

 *

 * Q3FtpDTP implemenatation

 *

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

Q3FtpDTP::Q3FtpDTP( Q3FtpPI *p, QObject *parent, const char *name ) :

    QObject( parent, name ),

    socket( 0, "Q3FtpDTP_socket" ),

    pi( p ),

    callWriteData( false )

{

    clearData();

    connect( &socket, SIGNAL(connected()),

	     SLOT(socketConnected()) );

    connect( &socket, SIGNAL(readyRead()),

	     SLOT(socketReadyRead()) );

    connect( &socket, SIGNAL(error(int)),

	     SLOT(socketError(int)) );

    connect( &socket, SIGNAL(connectionClosed()),

	     SLOT(socketConnectionClosed()) );

    connect( &socket, SIGNAL(bytesWritten(int)),

	     SLOT(socketBytesWritten(int)) );

}

void Q3FtpDTP::setData( QByteArray *ba )

{

    is_ba = true;

    data.ba = ba;

}

void Q3FtpDTP::setDevice( QIODevice *dev )

{

    is_ba = false;

    data.dev = dev;

}

void Q3FtpDTP::writeData()

{

    if ( is_ba ) {

#if defined(Q3FTPDTP_DEBUG)

	qDebug( "Q3FtpDTP::writeData: write %d bytes", data.ba->size() );

#endif

	if ( data.ba->size() == 0 )

	    emit dataTransferProgress( 0, bytesTotal );

	else

	    socket.writeBlock( data.ba->data(), data.ba->size() );

	socket.close();

	clearData();

    } else if ( data.dev ) {

	callWriteData = false;

	const int blockSize = 16*1024;

	char buf[blockSize];

	while ( !data.dev->atEnd() && socket.bytesToWrite()==0 ) {

	    Q_LONG read = data.dev->readBlock( buf, blockSize );

#if defined(Q3FTPDTP_DEBUG)

	    qDebug( "Q3FtpDTP::writeData: writeBlock() of size %d bytes", (int)read );

#endif

	    socket.writeBlock( buf, read );

	    if ( !data.dev )

		return; // this can happen when a command is aborted

	}

	if ( data.dev->atEnd() ) {

	    if ( bytesDone==0 && socket.bytesToWrite()==0 )

		emit dataTransferProgress( 0, bytesTotal );

	    socket.close();

	    clearData();

	} else {

	    callWriteData = true;

	}

    }

}

inline bool Q3FtpDTP::hasError() const

{

    return !err.isNull();

}

inline QString Q3FtpDTP::errorMessage() const

{

    return err;

}

inline void Q3FtpDTP::clearError()

{

    err.clear();

}

void Q3FtpDTP::abortConnection()

{

#if defined(Q3FTPDTP_DEBUG)

    qDebug( "Q3FtpDTP::abortConnection" );

#endif

    callWriteData = false;

    clearData();

    socket.clearPendingData();

    socket.close();

}

bool Q3FtpDTP::parseDir( const QString &buffer, const QString &userName, QUrlInfo *info )

{

    QStringList lst = QStringList::split( QLatin1String(" "), buffer );

    if ( lst.count() < 9 )

	return false;

    QString tmp;

    // permissions

    tmp = lst[ 0 ];

    if ( tmp[ 0 ] == QChar( QLatin1Char('d') ) ) {

	info->setDir( true );

	info->setFile( false );

	info->setSymLink( false );

    } else if ( tmp[ 0 ] == QChar( QLatin1Char('-') ) ) {

	info->setDir( false );

	info->setFile( true );

	info->setSymLink( false );

    } else if ( tmp[ 0 ] == QChar( QLatin1Char('l') ) ) {

	info->setDir( true ); // #### todo

	info->setFile( false );

	info->setSymLink( true );

    } else {

	return false;

    }

    static int user = 0;

    static int group = 1;

    static int other = 2;

    static int readable = 0;

    static int writable = 1;

    static int executable = 2;

    bool perms[ 3 ][ 3 ];

    perms[0][0] = (tmp[ 1 ] == QLatin1Char('r'));

    perms[0][1] = (tmp[ 2 ] == QLatin1Char('w'));

    perms[0][2] = (tmp[ 3 ] == QLatin1Char('x'));

    perms[1][0] = (tmp[ 4 ] == QLatin1Char('r'));

    perms[1][1] = (tmp[ 5 ] == QLatin1Char('w'));

    perms[1][2] = (tmp[ 6 ] == QLatin1Char('x'));

    perms[2][0] = (tmp[ 7 ] == QLatin1Char('r'));

    perms[2][1] = (tmp[ 8 ] == QLatin1Char('w'));

    perms[2][2] = (tmp[ 9 ] == QLatin1Char('x'));

    // owner

    tmp = lst[ 2 ];

    info->setOwner( tmp );

    // group

    tmp = lst[ 3 ];

    info->setGroup( tmp );

    // ### not correct

    info->setWritable( ( userName == info->owner() && perms[ user ][ writable ] ) ||

	perms[ other ][ writable ] );

    info->setReadable( ( userName == info->owner() && perms[ user ][ readable ] ) ||

	perms[ other ][ readable ] );

    int p = 0;

    if ( perms[ user ][ readable ] )

	p |= QUrlInfo::ReadOwner;

    if ( perms[ user ][ writable ] )

	p |= QUrlInfo::WriteOwner;

    if ( perms[ user ][ executable ] )

	p |= QUrlInfo::ExeOwner;

    if ( perms[ group ][ readable ] )

	p |= QUrlInfo::ReadGroup;

    if ( perms[ group ][ writable ] )

	p |= QUrlInfo::WriteGroup;

    if ( perms[ group ][ executable ] )

	p |= QUrlInfo::ExeGroup;

    if ( perms[ other ][ readable ] )

	p |= QUrlInfo::ReadOther;

    if ( perms[ other ][ writable ] )

	p |= QUrlInfo::WriteOther;

    if ( perms[ other ][ executable ] )

	p |= QUrlInfo::ExeOther;

    info->setPermissions( p );

    // size

    tmp = lst[ 4 ];

    info->setSize( tmp.toInt() );

    // date and time

    QTime time;

    QString dateStr;

    dateStr += QLatin1String("Sun ");

    lst[ 5 ][ 0 ] = lst[ 5 ][ 0 ].upper();

    dateStr += lst[ 5 ];

    dateStr += QLatin1Char(' ');

    dateStr += lst[ 6 ];

    dateStr += QLatin1Char(' ');

    if ( lst[ 7 ].contains( QLatin1Char(':') ) ) {

	time = QTime( lst[ 7 ].left( 2 ).toInt(), lst[ 7 ].right( 2 ).toInt() );

	dateStr += QString::number( QDate::currentDate().year() );

    } else {

	dateStr += lst[ 7 ];

    }

    QDate date = QDate::fromString( dateStr );

    info->setLastModified( QDateTime( date, time ) );

    if ( lst[ 7 ].contains( QLatin1Char(':') ) ) {

	const int futureTolerance = 600;

	if( info->lastModified().secsTo( QDateTime::currentDateTime() ) < -futureTolerance ) {

	    QDateTime dt = info->lastModified();

	    QDate d = dt.date();

	    d.setYMD(d.year()-1, d.month(), d.day());

	    dt.setDate(d);

	    info->setLastModified(dt);

	}

    }

    // name

    if ( info->isSymLink() )

	info->setName( lst[ 8 ].stripWhiteSpace() );

    else {

	QString n;

	for ( uint i = 8; i < (uint) lst.count(); ++i )

	    n += lst[ i ] + QLatin1Char(' ');

	n = n.stripWhiteSpace();

	info->setName( n );

    }

    return true;

}

void Q3FtpDTP::socketConnected()

{

#if !defined (Q_WS_QWS)

    // Use a large send buffer to reduce the number

    // of writeBlocks when download and uploading files.

    // The actual size used here (128k) is default on most

    // Unixes.