/* === This file is part of Calamares - <https://github.com/calamares> ===
 *
 *   Copyright 2015, Anke Boersma <demm@kaosx.us>
 *   Copyright 2015, Alexandre Arnt <qtgzmanager@gmail.com>
 *   Copyright 2015, Teo Mrnjavac <teo@kde.org>
 *   Copyright 2018, Adriaan de Groot <groot@kde.org>
 *
 *   Calamares 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 3 of the License, or
 *   (at your option) any later version.
 *
 *   Calamares is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
 */

#include "LicensePage.h"

#include "ui_LicensePage.h"
#include "LicenseWidget.h"

#include "JobQueue.h"
#include "GlobalStorage.h"
#include "ViewManager.h"

#include "utils/CalamaresUtilsGui.h"
#include "utils/Logger.h"
#include "utils/NamedEnum.h"
#include "utils/Retranslator.h"
#include "utils/Variant.h"

#include <QApplication>
#include <QBoxLayout>
#include <QDesktopServices>
#include <QFocusEvent>
#include <QLabel>
#include <QComboBox>
#include <QMessageBox>

#include <algorithm>

const NamedEnumTable< LicenseEntry::Type >&
LicenseEntry::typeNames()
{
    static const NamedEnumTable< LicenseEntry::Type > names{
        { QStringLiteral( "software" ), LicenseEntry::Type::Software},
        { QStringLiteral( "driver" ), LicenseEntry::Type::Driver },
        { QStringLiteral( "gpudriver" ), LicenseEntry::Type::GpuDriver },
        { QStringLiteral( "browserplugin" ), LicenseEntry::Type::BrowserPlugin},
        { QStringLiteral( "codec" ), LicenseEntry::Type::Codec },
        { QStringLiteral( "package" ), LicenseEntry::Type::Package }
    };

    return names;
}

LicenseEntry::LicenseEntry(const QVariantMap& conf)
{
    if ( !conf.contains( "id" ) || !conf.contains( "name" ) || !conf.contains( "url" ) )
        return;

    m_id = conf[ "id" ].toString();
    m_prettyName = conf[ "name" ].toString();
    m_prettyVendor = conf.value( "vendor" ).toString();
    m_url = QUrl( conf[ "url" ].toString() );

    m_required = CalamaresUtils::getBool( conf, "required", false );

    bool ok = false;
    QString typeString = conf.value( "type", "software" ).toString();
    m_type = typeNames().find( typeString, ok );
    if ( !ok )
        cWarning() << "License entry" << m_id << "has unknown type" << typeString << "(using 'software')";
}

bool
LicenseEntry::isLocal() const
{
    return m_url.isLocalFile();
}


LicensePage::LicensePage(QWidget *parent)
    : QWidget( parent )
    , m_isNextEnabled( false )
    , m_allLicensesOptional( false )
    , ui( new Ui::LicensePage )
{
    ui->setupUi( this );

    ui->verticalLayout->insertSpacing( 1, CalamaresUtils::defaultFontHeight() );

    ui->mainText->setAlignment( Qt::AlignCenter );
    ui->mainText->setWordWrap( true );
    ui->mainText->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Minimum );

    ui->additionalText->setWordWrap( true );

    ui->verticalLayout->insertSpacing( 4, CalamaresUtils::defaultFontHeight() / 2 );

    ui->verticalLayout->setContentsMargins( CalamaresUtils::defaultFontHeight(),
                                            CalamaresUtils::defaultFontHeight() * 3,
                                            CalamaresUtils::defaultFontHeight(),
                                            CalamaresUtils::defaultFontHeight() );

    ui->acceptFrame->setFrameStyle( QFrame::NoFrame | QFrame::Plain );
    ui->acceptFrame->setStyleSheet( "#acceptFrame { border: 1px solid red;"
                                    "background-color: #fff6f6;"
                                    "border-radius: 4px;"
                                    "padding: 2px; }" );
    ui->acceptFrame->layout()->setMargin( CalamaresUtils::defaultFontHeight() / 2 );

    updateGlobalStorage( false );  // Have not agreed yet

    connect( ui->acceptCheckBox, &QCheckBox::toggled, this, &LicensePage::checkAcceptance );

    CALAMARES_RETRANSLATE(
        ui->acceptCheckBox->setText( tr( "I accept the terms and conditions above." ) );
    )
}


void
LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
{
    CalamaresUtils::clearLayout( ui->licenseEntriesLayout );
    m_entries.clear();
    m_entries.reserve( entriesList.count() );

    const bool required = std::any_of( entriesList.cbegin(), entriesList.cend(), []( const LicenseEntry& e ){ return e.m_required; });
    if ( entriesList.isEmpty() )
        m_allLicensesOptional = true;
    else
        m_allLicensesOptional = !required;

    checkAcceptance( false );

    CALAMARES_RETRANSLATE(
        if ( required )
        {
            ui->mainText->setText( tr( "<h1>License Agreement</h1>"
                "This setup procedure will install proprietary "
                "software that is subject to licensing terms." ) );
            ui->additionalText->setText( tr( "Please review the End User License "
                "Agreements (EULAs) above.<br/>"
                "If you do not agree with the terms, the setup procedure cannot continue." ) );
        }
        else
        {
            ui->mainText->setText( tr( "<h1>License Agreement</h1>"
                "This setup procedure can install proprietary "
                "software that is subject to licensing terms "
                "in order to provide additional features and enhance the user "
                "experience." ) );
            ui->additionalText->setText( tr( "Please review the End User License "
                "Agreements (EULAs) above.<br/>"
                "If you do not agree with the terms, proprietary software will not "
                "be installed, and open source alternatives will be used instead." ) );
        }
        ui->retranslateUi( this );

        for ( const auto& w : m_entries )
            w->retranslateUi();
    )

    for ( const LicenseEntry& entry : entriesList )
    {
        LicenseWidget* w = new LicenseWidget( entry );
        ui->licenseEntriesLayout->addWidget( w );
        m_entries.append( w );
    }
    ui->licenseEntriesLayout->addStretch();
}


bool
LicensePage::isNextEnabled() const
{
    return m_isNextEnabled;
}

void
LicensePage::updateGlobalStorage( bool v )
{
    Calamares::JobQueue::instance()->globalStorage()->insert( "licenseAgree", v );
}

void LicensePage::checkAcceptance( bool checked )
{
    updateGlobalStorage( checked );

    m_isNextEnabled = checked || m_allLicensesOptional;
    if ( !m_isNextEnabled )
    {
        ui->acceptFrame->setStyleSheet( "#acceptFrame { border: 1px solid red;"
                                        "background-color: #fff8f8;"
                                        "border-radius: 4px;"
                                        "padding: 2px; }" );
    }
    else
    {
        ui->acceptFrame->setStyleSheet( "#acceptFrame { padding: 3px }" );
    }
    emit nextStatusChanged( checked );
}