/***************************************************************************
                          quickbar.cpp  -  description
                             -------------------
    begin                : Mon Feb 11 2002
    copyright            : (C) 2002 by Martin Witte / Frank Schwanz
    email                : witte@kawo1.rwth-aachen.de / schwanz@fh-brandenburg.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include <qtooltip.h>
#include <qnamespace.h>
#include <qhbuttongroup.h>
#include <qvbuttongroup.h>

#include <ktoolbarbutton.h>
#include <kwin.h>
#include <klocale.h>
#include <kglobal.h>
#include <kconfig.h>
#include <kaboutdata.h>

#include "../../src/include/aboutwidget.h"
#include "../../src/include/station-drag-object.h"
#include "../../src/include/stationlist.h"
#include "../../src/include/radiostation.h"

#include "buttonflowlayout.h"
#include "quickbar-configuration.h"
#include "quickbar.h"

///////////////////////////////////////////////////////////////////////
//// plugin library functions

PLUGIN_LIBRARY_FUNCTIONS(QuickBar, "kradio-gui-quickbar", i18n("Radio Station Quick Selection Toolbar"));

/////////////////////////////////////////////////////////////////////////////

QuickBar::QuickBar(const QString &name)
  : QWidget(NULL, name.ascii()),
    WidgetPluginBase(name, i18n("Quickbar Plugin")),
    m_layout(NULL),
    m_buttonGroup(NULL),
    m_showShortName(true),
    m_ignoreNoticeActivation(false)
{
    autoSetCaption();
    setAcceptDrops(true);
}


QuickBar::~QuickBar()
{
}


bool QuickBar::connectI(Interface *i)
{
    bool a = IRadioClient::connectI(i);
    bool b = IStationSelection::connectI(i);
    bool c = PluginBase::connectI(i);

    return a || b || c;
}


bool QuickBar::disconnectI(Interface *i)
{
    bool a = IRadioClient::disconnectI(i);
    bool b = IStationSelection::disconnectI(i);
    bool c = PluginBase::disconnectI(i);

    return a || b || c;
}


// IStationSelection

bool QuickBar::setStationSelection(const QStringList &sl)
{
    if (m_stationIDs != sl) {
        m_stationIDs = sl;
        rebuildGUI();
        notifyStationSelectionChanged(m_stationIDs);
    }
    return true;
}

// PluginBase methods


void QuickBar::restoreState (KConfig *config)
{
    config->setGroup(QString("quickBar-") + name());

    WidgetPluginBase::restoreState(config, false);

    int nStations = config->readNumEntry("nStations", 0);
    m_stationIDs.clear();
    for (int i = 1; i <= nStations; ++i) {
        QString s = config->readEntry(QString("stationID-") + QString().setNum(i), QString::null);
        if (s.length())
            m_stationIDs += s;
    }

    rebuildGUI();
    notifyStationSelectionChanged(m_stationIDs);
}


void QuickBar::saveState (KConfig *config) const
{
    config->setGroup(QString("quickBar-") + name());

    WidgetPluginBase::saveState(config);

    config->writeEntry("nStations", m_stationIDs.size());
    int i = 1;
    QStringList::const_iterator end = m_stationIDs.end();
    for (QStringList::const_iterator it = m_stationIDs.begin(); it != end; ++it, ++i) {
        config->writeEntry(QString("stationID-") + QString().setNum(i), *it);
    }
}


ConfigPageInfo QuickBar::createConfigurationPage()
{
    QuickbarConfiguration *conf = new QuickbarConfiguration(NULL);
    connectI (conf);
    return ConfigPageInfo(
        conf,
        i18n("Quickbar"),
        i18n("Quickbar Configuration"),
        "view_icon"
    );
}


AboutPageInfo QuickBar::createAboutPage()
{
/*    KAboutData aboutData("kradio",
                         NULL,
                         NULL,
                         I18N_NOOP("Quickback for KRadio"),
                         KAboutData::License_GPL,
                         "(c) 2002-2005 Martin Witte, Klas Kalass",
                         0,
                         "http://sourceforge.net/projects/kradio",
                         0);
    aboutData.addAuthor("Martin Witte",  "", "witte@kawo1.rwth-aachen.de");
    aboutData.addAuthor("Klas Kalass",   "", "klas.kalass@gmx.de");

    return AboutPageInfo(
              new KRadioAboutWidget(aboutData, KRadioAboutWidget::AbtTabbed),
              i18n("Quickbar"),
              i18n("Quickbar Plugin"),
              "view_icon"
           );*/
    return AboutPageInfo();
}


// IRadio methods

bool QuickBar::noticePowerChanged(bool /*on*/)
{
    activateCurrentButton();
    autoSetCaption();
    return true;
}


bool QuickBar::noticeStationChanged (const RadioStation &rs, int /*idx*/)
{
    if (!m_ignoreNoticeActivation)
        activateButton(rs);
    autoSetCaption();
    return true;
}


bool QuickBar::noticeStationsChanged(const StationList &/*sl*/)
{
    // FIXME
    // we can remove no longer existent stationIDs,
    // but it doesn't matter if we don't care.
    rebuildGUI();
    return true;
}


// button management methods

void QuickBar::buttonClicked(int id)
{
    // ouch, but we are still using QStringList :(
    if (queryIsPowerOn() && id == getButtonID(queryCurrentStation())) {
        sendPowerOff();
    } else {

        int k = 0;
        QStringList::iterator end = m_stationIDs.end();
        for (QStringList::iterator it = m_stationIDs.begin(); it != end; ++it, ++k) {
            if (k == id) {
                const RawStationList &sl = queryStations().all();
                const RadioStation &rs = sl.stationWithID(*it);
                bool old = m_ignoreNoticeActivation;
                m_ignoreNoticeActivation = true;
                sendActivateStation(rs);
                m_ignoreNoticeActivation = old;
                sendPowerOn();
            }
        }
    }
    // Problem: if we click a button twice, there will be no
    // "station changed"-notification. Thus it would be possible to
    // enable a button even if power is off or the radio does not
    // accept the radiostation
    //activateCurrentButton();
}


int QuickBar::getButtonID(const RadioStation &rs) const
{
    QString stationID = rs.stationID();
    int k = 0;
    QStringList::const_iterator end = m_stationIDs.end();
    for (QStringList::const_iterator it = m_stationIDs.begin(); it != end; ++it, ++k) {
        if (*it == stationID)
            return k;
    }
    return -1;
}


void QuickBar::activateCurrentButton()
{
    activateButton(queryCurrentStation());
}


void QuickBar::activateButton(const RadioStation &rs)
{
    int buttonID = getButtonID(rs);
    bool pwr = queryIsPowerOn();

    if (pwr && buttonID >= 0) {
        m_buttonGroup->setButton(buttonID);
    } else {
        for (QToolButton *b = m_buttons.first(); b; b = m_buttons.next()) {
            b->setOn(false);
        }
    }
    autoSetCaption();
}



// KDE/Qt gui


void QuickBar::rebuildGUI()
{
    if (m_layout) delete m_layout;
    if (m_buttonGroup) delete m_buttonGroup;

    for (QPtrListIterator<QToolButton> it(m_buttons); it.current(); ++it)
        delete it.current();
       m_buttons.clear();

    m_layout = new ButtonFlowLayout(this);
    m_layout->setMargin(1);
    m_layout->setSpacing(2);

    m_buttonGroup = new QButtonGroup(this);
    QObject::connect (m_buttonGroup, SIGNAL(clicked(int)), this, SLOT(buttonClicked(int)));
    // we use buttonGroup to enable automatic toggle/untoggle
    m_buttonGroup->setExclusive(true);
    m_buttonGroup->setFrameStyle(QFrame::NoFrame);
    m_buttonGroup->show();

    int buttonID = 0;
    const RawStationList &stations = queryStations().all();

    QStringList::iterator end = m_stationIDs.end();
    for (QStringList::iterator it = m_stationIDs.begin(); it != end; ++it, ++buttonID) {

        const RadioStation &rs = stations.stationWithID(*it);
        if (! rs.isValid()) continue;

        QToolButton *b = new QToolButton(this);
        m_buttons.append(b);
        b->setToggleButton(true);
        if (rs.iconName().length())
            b->setIconSet(QPixmap(rs.iconName()));
        else
            b->setText(m_showShortName ? rs.shortName() : rs.name());

        b->setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred));

        QToolTip::add(b, rs.longName());
        if (isVisible()) b->show();


        m_buttonGroup->insert(b, buttonID);
        m_layout->add(b);
    }

    // activate correct button
    activateCurrentButton();

    // calculate geometry
    if (m_layout) {
        QRect r = geometry();
        int h = m_layout->heightForWidth( r.width());

        if (h > r.height())
            setGeometry(r.x(), r.y(), r.width(), h);
    }
}




void QuickBar::show()
{
//      KWin::setType(winId(), NET::Toolbar);
    WidgetPluginBase::pShow();
    QWidget::show();
}


void QuickBar::showOnOrgDesktop()
{
    WidgetPluginBase::pShowOnOrgDesktop();
    //QWidget::show();
}


void QuickBar::hide()
{
    WidgetPluginBase::pHide();
    QWidget::hide();
}

void    QuickBar::showEvent(QShowEvent *e)
{
    QWidget::showEvent(e);
    WidgetPluginBase::pShowEvent(e);
}

void    QuickBar::hideEvent(QHideEvent *e)
{
    QWidget::hideEvent(e);
    WidgetPluginBase::pHideEvent(e);
}


void QuickBar::setGeometry (int x, int y, int w, int h)
{
    if (m_layout) {
        QSize marginSize(m_layout->margin()*2, m_layout->margin()*2);
        setMinimumSize(m_layout->minimumSize(QSize(w, h) - marginSize) + marginSize);
    }
    QWidget::setGeometry (x, y, w, h);
}


void QuickBar::setGeometry (const QRect &r)
{
    setGeometry (r.x(), r.y(), r.width(), r.height());
}


void QuickBar::resizeEvent (QResizeEvent *e)
{
    // minimumSize might change because of the flow layout
    if (m_layout) {
        QSize marginSize(m_layout->margin()*2, m_layout->margin()*2);
        setMinimumSize(m_layout->minimumSize(e->size() - marginSize) + marginSize);
    }

    QWidget::resizeEvent (e);
}


void QuickBar::autoSetCaption()
{
    const RadioStation &rs = queryCurrentStation();
    setCaption((queryIsPowerOn() && rs.isValid()) ? rs.longName() : QString("KRadio"));
}

void QuickBar::dragEnterEvent(QDragEnterEvent* event)
{
    bool a = StationDragObject::canDecode(event);
    if (a)
        IErrorLogClient::staticLogDebug(i18n("contentsDragEnterEvent accepted"));
    else
        IErrorLogClient::staticLogDebug(i18n("contentsDragEnterEvent rejected"));
    event->accept(a);
}

void QuickBar::dropEvent(QDropEvent* event)
{
    QStringList list;

    if ( StationDragObject::decode(event, list) ) {
        QStringList l = getStationSelection();
        for (QValueListConstIterator<QString> it = list.begin(); it != list.end(); ++it)
            if (!l.contains(*it))
                l.append(*it);
        setStationSelection(l);
    }
}


#include "quickbar.moc"