/* === This file is part of Calamares - <https://calamares.io> ===
 *
 *   SPDX-FileCopyrightText: 2014-2015 Teo Mrnjavac <teo@kde.org>
 *   SPDX-License-Identifier: GPL-3.0-or-later
 *
 *   Calamares is Free Software: see the License-Identifier above.
 *
 */

#include "InteractiveTerminalPage.h"

#include "utils/CalamaresUtilsGui.h"
#include "utils/Logger.h"
#include "utils/Retranslator.h"
#include "viewpages/ViewStep.h"
#include "widgets/TranslationFix.h"

#include <KParts/ReadOnlyPart>
#include <KParts/kde_terminal_interface.h>
#include <KService>
#include <kcoreaddons_version.h>

#include <QApplication>
#include <QDir>
#include <QLabel>
#include <QMessageBox>
#include <QVBoxLayout>


InteractiveTerminalPage::InteractiveTerminalPage( QWidget* parent )
    : QWidget( parent )
    , m_layout( new QVBoxLayout( this ) )
    , m_termHostWidget( nullptr )
{
    setLayout( m_layout );
    m_layout->setContentsMargins( 0, 0, 0, 0 );

    m_headerLabel = new QLabel( this );
    m_layout->addWidget( m_headerLabel );
}

void
InteractiveTerminalPage::errorKonsoleNotInstalled()
{
    QMessageBox mb( QMessageBox::Critical,
                    tr( "Konsole not installed" ),
                    tr( "Please install KDE Konsole and try again!" ),
                    QMessageBox::Ok );
    Calamares::fixButtonLabels( &mb );
    mb.exec();
}

void
InteractiveTerminalPage::onActivate()
{
    if ( m_termHostWidget )
    {
        return;
    }

#if KCOREADDONS_VERSION_MAJOR != 5
#error Incompatible with not-KF5
#endif
#if KCOREADDONS_VERSION_MINOR >= 86
    // 5.86 deprecated a bunch of KService and PluginFactory and related methods
    auto md = KPluginMetaData::findPluginById( QString(), "konsolepart" );
    if ( !md.isValid() )
    {
        errorKonsoleNotInstalled();
        return;
    }
    auto* p = KPluginFactory::instantiatePlugin< KParts::ReadOnlyPart >( md, this ).plugin;
#else
    KService::Ptr service = KService::serviceByDesktopName( "konsolepart" );
    if ( !service )
    {
        errorKonsoleNotInstalled();
        return;
    }

    // Create one instance of konsolepart.
    KParts::ReadOnlyPart* p = service->createInstance< KParts::ReadOnlyPart >( this, this, {} );
#endif
    if ( !p )
    {
        // One more opportunity for the loading operation to fail.
        errorKonsoleNotInstalled();
        return;
    }

    // Cast the konsolepart to the TerminalInterface...
    TerminalInterface* t = qobject_cast< TerminalInterface* >( p );
    if ( !t )
    {
        // This is why we can't have nice things.
        errorKonsoleNotInstalled();
        return;
    }

    // Make the widget persist even if the KPart goes out of scope...
    p->setAutoDeleteWidget( false );
    // ... but kill the KPart if the widget goes out of scope.
    p->setAutoDeletePart( true );

    m_termHostWidget = p->widget();
    m_layout->addWidget( m_termHostWidget );

    t->showShellInDir( QDir::home().path() );
    t->sendInput( QString( "%1\n" ).arg( m_command ) );
}


void
InteractiveTerminalPage::setCommand( const QString& command )
{
    m_command = command;
    CALAMARES_RETRANSLATE(
        m_headerLabel->setText( tr( "Executing script: &nbsp;<code>%1</code>" ).arg( m_command ) ); );
}