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

    source::worx libWidgets
    Copyright © 2021-2022 c.holzheuer
    c.holzheuer@sourceworx.org

    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 <QPaintEvent>
#include <QPainter>
#include <QDebug>
#include <QEvent>
#include <QStyleOption>

#include <swsidebar.h>





SWSideBar::SWSideBar( QWidget *parent )
   : QFrame( parent )
{
    setMouseTracking( true );
}


SWSideBar::~SWSideBar()
{

}


void SWSideBar::appendAction( QAction* action )
{
    Q_ASSERT( action != nullptr );
    action->setCheckable( true );
    //action->setEnabled( false );
    QFrame::addAction( action );

}


void SWSideBar::appendAction( const QIcon& icon, const QString& text )
{
    return appendAction( new QAction( icon, text ) );
}

void SWSideBar::setCheckedAction( QAction* action )
{
    /// PFUSCH! Prüfen!
    _checkedAction = action;
    update();
}

void SWSideBar::paintEvent( QPaintEvent* event )
{


    QPainter painter( this );

    int actionY = 0;
    for( auto& action : actions() )
    {

        QRect actionRect( 0, actionY, event->rect().width(), SWACTIONHEIGHT );
        if( action->isEnabled() )
        {
            if( action == _hoveredAction )
                painter.fillRect( actionRect, _hoveredColor );

            if( action == _pressedAction )
                painter.fillRect( actionRect, Qt::lightGray );

            if( action == _checkedAction )
                painter.fillRect( actionRect, _checkedColor );

        }

        QSize size = painter.fontMetrics().size( Qt::TextSingleLine, action->text() );
        QRect textRect( QPoint( actionRect.width()/2 - size.width()/2, actionRect.bottom()-size.height() - 10 ), size );
        painter.setPen( action->isEnabled() ? Qt::white : Qt::gray );
        painter.drawText( textRect, Qt::AlignCenter, action->text() );

        QRect pixmapRect( actionRect.width()/2 - 32, actionY+15 , 64, 64 );
        QPixmap pixmap = action->icon().pixmap( QSize( 64, 64 ),  action->isEnabled() ?   QIcon::Normal : QIcon::Disabled, QIcon::On );
        painter.drawPixmap( pixmapRect, pixmap );

        actionY += actionRect.height();

    }

}



void SWSideBar::mousePressEvent( QMouseEvent* event )
{

    QAction* tempAction = actionAt( event->pos() );
    if( tempAction == nullptr )
       return;

    if( _hoveredAction == tempAction )
        _hoveredAction = nullptr;

    _pressedAction = tempAction;

    update();
    QFrame::mousePressEvent (event );

}


void SWSideBar::mouseReleaseEvent( QMouseEvent *event )
{

    QAction* tempAction = actionAt( event->pos() );
    if( tempAction == nullptr )
        return;

    if( tempAction == _pressedAction )
    {
       _hoveredAction = _pressedAction;
       _checkedAction = _pressedAction;
       _pressedAction = nullptr;
       update();
       if( _checkedAction->isEnabled() )
           _checkedAction->trigger();

    }


    //update();QGuiApplication::palette()) an QPalette::Highlight
    QFrame::mouseReleaseEvent( event );

}


void SWSideBar::mouseMoveEvent(QMouseEvent *event)
{
    QAction* tempAction = actionAt( event->pos() );
    /// nix gefunden
    if( tempAction == nullptr)
    {
        /// dann ist auch nix gehovered
        _hoveredAction = nullptr;
        update();
        return;
    }
    /// ist schon gehovered? auch weg
    if(  _hoveredAction == tempAction )
        return;

    _hoveredAction = tempAction;
    update();
    QFrame::mouseMoveEvent(event);
}


void SWSideBar::leaveEvent(QEvent * event)
{
    _hoveredAction = _pressedAction = nullptr;
    update();
    QFrame::leaveEvent(event);
}


QSize SWSideBar::minimumSizeHint() const
{
    return SWACTIONHEIGHT * QSize( 1, actions().size() );
}


QAction* SWSideBar::actionAt(const QPoint &at)
{
    int actionY = 0;

    for( QAction* action : actions() )
    {
        QRect actionRect( 0, actionY, rect().width(), SWACTIONHEIGHT );
        if(actionRect.contains(at))
            return action;
        actionY += actionRect.height();
    }
    return nullptr;
}