/**********************************************************************
** Copyright (C) 2002 Michael 'Mickey' Lauer
**               <mickey@tm.informatik.uni-frankfurt.de>
**               http://www.Vanille.de
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
**********************************************************************/

#include "wireless.h"

#include <qapplication.h>
#include <qpe/qpeapplication.h>
#include <qpe/config.h>

#include <qpoint.h>
#include <qradiobutton.h>
#include <qcheckbox.h>
#include <qpainter.h>
#include <qlabel.h>
#include <qslider.h>
#include <qbuttongroup.h>
#include <qlayout.h>
#include <qframe.h>
#include <qpixmap.h>
#include <qstring.h>
#include <qfile.h>

#include "networkinfo.h"
#include "mgraph.h"

#include "connect0.xpm"
#include "connect1.xpm"
#include "connect2.xpm"
#include "connect3.xpm"
#include "connect4.xpm"
#include "connect5.xpm"
#include "nowireless.xpm"

#define STYLE_BARS 0
#define STYLE_ANTENNA 1

WirelessControl::WirelessControl( WirelessApplet *applet, QWidget *parent, const char *name )
    : QFrame( parent, name, WStyle_StaysOnTop | WType_Popup ), applet( applet )
{

    readConfig();
    writeConfigEntry( "UpdateFrequency", updateFrequency );
    writeConfigEntry( "DisplayStyle", displayStyle );
    
    setFrameStyle( QFrame::PopupPanel | QFrame::Raised );    
    QGridLayout *grid = new QGridLayout( this, 3, 2, 6, 2, "top layout" );  
    
    /* status label */
    
    statusLabel = new QLabel( this, "statuslabel" );
    QString text( "Wireless Status:<br>"
	                "*** Unknown ***<br>"
                    "Card not inserted ?<br>"
                    "Or Sharp ROM ?<br>"
                    "CELL: 00:00:00:00:00:00" );
/*    QString text( "Station: Unknown<br>"
	                "ESSID: Unknown<br>"
                    "MODE: Unknown<br>"
                    "FREQ: Unknown<br>"
                    "CELL: AA:BB:CC:DD:EE:FF" ); */
    statusLabel->setText( text );
    statusLabel->setFixedSize( statusLabel->sizeHint() );
    grid->addWidget( statusLabel, 0, 0 );

    /* visualization group box */
    
    QButtonGroup* group = new QButtonGroup( 1, Qt::Horizontal, "Visualization", this );
    QRadioButton* r1 = new QRadioButton( "Color Bars", group );
    QRadioButton* r2 = new QRadioButton( "Antenna", group );
    r1->setFocusPolicy( QWidget::NoFocus );
    r2->setFocusPolicy( QWidget::NoFocus );
    group->setFocusPolicy( QWidget::NoFocus );
    group->setButton( displayStyle );
    grid->addWidget( group, 0, 1 );

    /* quality graph */
    
    mgraph = new MGraph( this );
    mgraph->setFrameStyle( QFrame::Panel | QFrame::Sunken );
    mgraph->setMin( 0 );
    mgraph->setMax( 92 );
    grid->addWidget( mgraph, 1, 0 );
    mgraph->setFocusPolicy( QWidget::NoFocus );
    
    /* dhcp renew CheckBox */
    
    //FIXME: under construction
    //QCheckBox* dhcpCheckBox = new QCheckBox( "DHCP renew", this );
    //dhcpCheckBox->setFocusPolicy( QWidget::NoFocus );
    //grid->addWidget( dhcpCheckBox, 2, 0, Qt::AlignCenter );

    /* update Frequency Label */
    
    updateLabel = new QLabel( this );
    text.sprintf( "Update every %d s", updateFrequency );
    updateLabel->setText( text );
    grid->addWidget( updateLabel, 2, 1 );

    /* update Frequency Slider */
    
    QSlider* updateSlider = new QSlider( QSlider::Horizontal, this );
    updateSlider->setRange( 0, 9 );
    updateSlider->setValue( updateFrequency );
    updateSlider->setTickmarks( QSlider::Both );
    updateSlider->setTickInterval( 1 );
    updateSlider->setSteps( 1, 1 );
    updateSlider->setFocusPolicy( QWidget::NoFocus );
    grid->addWidget( updateSlider, 1, 1 );
    connect( updateSlider, SIGNAL( valueChanged( int ) ),
             this, SLOT( updateDelayChange( int ) ) );

    setFixedSize( sizeHint() );
    setFocusPolicy( QWidget::NoFocus );

    applet->displayStyleChange( displayStyle );
    applet->updateDelayChange( updateFrequency );
    
    connect( group, SIGNAL( clicked( int ) ),
             this, SLOT( displayStyleChange( int ) ) );    
}

void WirelessControl::updateDelayChange( int delay )
{
    QString text;
    text.sprintf( "Update every %d s", delay );
    updateLabel->setText( text );
    applet->updateDelayChange( delay );
    writeConfigEntry( "UpdateFrequency", delay );
}

void WirelessControl::displayStyleChange( int style )
{
    applet->displayStyleChange( style );
    writeConfigEntry( "DisplayStyle", style );
}

void WirelessControl::show ( bool )
{
  QPoint curPos = applet->mapToGlobal( QPoint ( 0, 0 ) );

  int w = sizeHint().width();
  int x = curPos.x() - ( w / 2 );

  if ( ( x + w ) > QPEApplication::desktop()->width() )
      x = QPEApplication::desktop ( )-> width ( ) - w;

  move( x, curPos.y () - sizeHint().height () );
  QFrame::show();
}

void WirelessControl::readConfig()
{
    Config cfg( "qpe" );
    cfg.setGroup( "Wireless" );
    
    updateFrequency = cfg.readNumEntry( "UpdateFrequency", 2 );
    displayStyle = cfg. readNumEntry( "DisplayStyle", STYLE_ANTENNA );   
}

void WirelessControl::writeConfigEntry( const char *entry, int val )
{
    Config cfg( "qpe" );
    cfg.setGroup( "Wireless" );
    cfg.writeEntry( entry, val );
}
  
//===========================================================================

WirelessApplet::WirelessApplet( QWidget *parent, const char *name )
    : QWidget( parent, name ), visualStyle( STYLE_ANTENNA ),
      timer( 0 ), interface( 0 )
{
    setFixedHeight( 18 );
    setFixedWidth( 14 );
    network = new MWirelessNetwork();
    status = new WirelessControl( this, 0, "wireless status" );
}

void WirelessApplet::checkInterface()
{
    interface = network->getFirstInterface();
    if ( interface )
    {
        qDebug( "WIFIAPPLET: using interface '%s'", (const char*)
                 interface->getName() );
    }
    else
    {
        qDebug( "WIFIAPPLET: D'oh! No Wireless interface present... :(" );
    }   
}    

void WirelessApplet::updateDelayChange( int delay )
{
    if ( timer )
        killTimer( timer );
    delay *= 1000;
    if ( delay == 0 )
        delay = 50;
    timer = startTimer( delay );
}

void WirelessApplet::displayStyleChange( int style )
{
    visualStyle = style;
    repaint();
}

WirelessApplet::~WirelessApplet()
{
}

void WirelessApplet::timerEvent( QTimerEvent* )
{
    MWirelessNetworkInterface* iface = ( MWirelessNetworkInterface* ) interface;
  
    if ( iface )
    {
        iface->updateStatistics();
        if ( mustRepaint() )
        {
            //qDebug( "WIFIAPPLET: A value has changed -> repainting." );
            repaint();
        }
        
        if ( status->isVisible() )
            updatePopupWindow();
    } else checkInterface();
}

void WirelessApplet::mousePressEvent( QMouseEvent *)
{   
    if ( status->isVisible() )
         status->hide();
    else
        status->show( true );
}

bool WirelessApplet::mustRepaint()
{
    MWirelessNetworkInterface* iface = ( MWirelessNetworkInterface* ) interface;
    
    // check if there are enough changes to justify a (flickering) repaint
    
    // has the interface changed?
    
    if ( iface != oldiface )
    {
        oldiface = iface; 
        return true;
    }
   
    const char** pixmap = getQualityPixmap();
    
    if ( pixmap && ( pixmap != oldpixmap ) )
    {
        oldpixmap = pixmap;
        return true;
    }
    
    int noiseH = iface->noisePercent() * ( height() - 3 ) / 100;
    int signalH = iface->signalPercent() * ( height() - 3 ) / 100;
    int qualityH = iface->qualityPercent() * ( height() - 3 ) / 100;
    
    if ( ( noiseH != oldnoiseH )
      || ( signalH != oldsignalH )
      || ( qualityH != oldqualityH ) )
    {
        oldnoiseH = noiseH;
        oldsignalH = signalH;
        oldqualityH = qualityH;
        return true;
    }
    
    return false;
}

void WirelessApplet::updatePopupWindow()
{
    MWirelessNetworkInterface* iface = ( MWirelessNetworkInterface* ) interface;
    int qualityH = iface->qualityPercent();

    if ( status->mgraph )
        status->mgraph->addValue( qualityH, false );
    
    QString freqString;
    QString cell = ( iface->mode == "Managed" ) ? "AP: " : "Cell: ";
    freqString.sprintf( "%.3f GHz", iface->freq );
    status->statusLabel->setText( "Station: " + iface->nick + "<br>" +
                                  "ESSID: " + iface->essid + "<br>" +
                                  "MODE: " + iface->mode + "<br>" +
                                  "FREQ: " + freqString + "<br>" +
                                  cell + " " + iface->APAddr );
}   

const char** WirelessApplet::getQualityPixmap()
{    
    MWirelessNetworkInterface* iface = ( MWirelessNetworkInterface* ) interface;
    
    if ( !iface ) return ( const char** ) nowireless_xpm;
    int qualityH = iface->qualityPercent();
    if ( qualityH < 0 ) return ( const char** ) nowireless_xpm;
    
    if ( visualStyle == STYLE_ANTENNA )
    {
        if ( qualityH < 1 ) return ( const char** ) connect0_xpm;
        if ( qualityH < 17 ) return ( const char** ) connect1_xpm; 
        if ( qualityH < 34 ) return ( const char** ) connect2_xpm;
        if ( qualityH < 50 ) return ( const char** ) connect3_xpm;
        if ( qualityH < 65 ) return ( const char** ) connect4_xpm;
        return ( const char** ) connect5_xpm;
    }
    
    return 0; // please draw your bars
}

void WirelessApplet::paintEvent( QPaintEvent* )
{
    MWirelessNetworkInterface* iface = ( MWirelessNetworkInterface* ) interface;

    QPainter p(this);
    QColor color;

    const char** pixmap = getQualityPixmap();
    
    if ( pixmap )
        p.drawPixmap( 0, 1, pixmap );
    else
    {

        int noiseH = iface->noisePercent() * ( height() - 3 ) / 100;
        int signalH = iface->signalPercent() * ( height() - 3 ) / 100;
        int qualityH = iface->qualityPercent() * ( height() - 3 ) / 100;

        double intensity;
        int pixelHeight;
        int pixelWidth = 2;
        int Hue;
        int barSpace = 3;
        int leftoffset = 0;
        int bottomoffset = 2;

        // draw noise indicator
        pixelHeight = noiseH;
        Hue = 50;
        for ( int i = 0; i < pixelHeight; ++i )
        {
            intensity = 50 + ( (double) i / (double) pixelHeight ) * 205;
            color.setHsv( Hue, 255, intensity );
            p.setPen ( color );
            p.drawLine( leftoffset, height()-bottomoffset-i, pixelWidth+leftoffset, height()-bottomoffset-i );
        }

        // draw signal indicator
        pixelHeight = signalH;
        Hue = 100;
        leftoffset += pixelWidth + barSpace;
        for ( int i = 0; i < pixelHeight; ++i )
        {
            intensity = 50 + ( (double) i / (double) pixelHeight ) * 205;
            color.setHsv( Hue, 255, intensity );
            p.setPen ( color );
            p.drawLine( leftoffset, height()-bottomoffset-i, pixelWidth+leftoffset, height()-bottomoffset-i );
        }

        // draw quality indicator
        pixelHeight = qualityH;
        Hue = 250;
        leftoffset += pixelWidth + barSpace;
        for ( int i = 0; i < pixelHeight; ++i )
        {
            intensity = 50 + ( (double) i / (double) pixelHeight ) * 205;
            color.setHsv( Hue, 255, intensity );
            p.setPen ( color );
            p.drawLine( leftoffset, height()-bottomoffset-i, pixelWidth+leftoffset, height()-bottomoffset-i );
        }
    }    
}