/****************************************************************************
**
** Copyright (C) 2016 BlackBerry Limited. All rights reserved.
** Contact: BlackBerry (qt@blackberry.com)
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

#include "mcusupportconstants.h"
#include "mcusupportoptionspage.h"
#include "mcusupportoptions.h"

#include <coreplugin/icore.h>
#include <projectexplorer/kitmanager.h>
#include <projectexplorer/projectexplorerconstants.h>
#include <utils/algorithm.h>
#include <utils/qtcassert.h>
#include <utils/utilsicons.h>

#include <QComboBox>
#include <QDir>
#include <QFormLayout>
#include <QGroupBox>
#include <QLabel>
#include <QVBoxLayout>

namespace McuSupport {
namespace Internal {

class McuSupportOptionsWidget : public QWidget
{
public:
    McuSupportOptionsWidget(const McuSupportOptions *options, QWidget *parent = nullptr);

    void updateStatus();
    void showMcuTargetPackages();
    McuTarget *currentMcuTarget() const;

private:
    QString m_armGccPath;
    const McuSupportOptions *m_options;
    QMap <McuPackage*, QWidget*> m_packageWidgets;
    QMap <McuTarget*, QWidget*> m_mcuTargetPacketWidgets;
    QFormLayout *m_packagesLayout = nullptr;
    QLabel *m_statusLabel = nullptr;
    QComboBox *m_mcuTargetComboBox = nullptr;
};

McuSupportOptionsWidget::McuSupportOptionsWidget(const McuSupportOptions *options, QWidget *parent)
    : QWidget(parent)
    , m_options(options)
{
    auto mainLayout = new QVBoxLayout(this);

    auto mcuTargetChooserlayout = new QHBoxLayout;
    auto mcuTargetChooserLabel = new QLabel(McuSupportOptionsPage::tr("Target:"));
    mcuTargetChooserlayout->addWidget(mcuTargetChooserLabel);
    m_mcuTargetComboBox = new QComboBox;
    mcuTargetChooserLabel->setBuddy(m_mcuTargetComboBox);
    mcuTargetChooserLabel->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred);
    m_mcuTargetComboBox->addItems(
                Utils::transform<QStringList>(m_options->mcuTargets, [this](McuTarget *t){
                    return m_options->kitName(t);
                }));
    mcuTargetChooserlayout->addWidget(m_mcuTargetComboBox);
    mainLayout->addLayout(mcuTargetChooserlayout);

    auto m_packagesGroupBox = new QGroupBox(McuSupportOptionsPage::tr("Packages"));
    mainLayout->addWidget(m_packagesGroupBox);
    m_packagesLayout = new QFormLayout;
    m_packagesGroupBox->setLayout(m_packagesLayout);

    m_statusLabel = new QLabel;
    mainLayout->addWidget(m_statusLabel, 2);
    m_statusLabel->setWordWrap(true);
    m_statusLabel->setAlignment(Qt::AlignBottom | Qt::AlignLeft);

    connect(options, &McuSupportOptions::changed, this, &McuSupportOptionsWidget::updateStatus);
    connect(m_mcuTargetComboBox, &QComboBox::currentTextChanged,
            this, &McuSupportOptionsWidget::showMcuTargetPackages);

    showMcuTargetPackages();
    updateStatus();
}

void McuSupportOptionsWidget::updateStatus()
{
    const McuTarget *mcuTarget = currentMcuTarget();
    if (!mcuTarget)
        return;

    m_statusLabel->setText(mcuTarget->isValid()
                ? QString::fromLatin1("A kit <b>%1</b> for the selected target can be generated. "
                                      "Press Apply to generate it.").arg(m_options->kitName(
                                                                             mcuTarget))
                : QString::fromLatin1("Provide the package paths in order to create a kit for "
                                      "your target."));
}

void McuSupportOptionsWidget::showMcuTargetPackages()
{
    const McuTarget *mcuTarget = currentMcuTarget();
    if (!mcuTarget)
        return;

    while (m_packagesLayout->rowCount() > 0) {
        QFormLayout::TakeRowResult row = m_packagesLayout->takeRow(0);
        row.labelItem->widget()->hide();
        row.fieldItem->widget()->hide();
    }

    for (auto package : m_options->packages) {
        QWidget *packageWidget = package->widget();
        if (!mcuTarget->packages().contains(package))
            continue;
        m_packagesLayout->addRow(package->label(), packageWidget);
        packageWidget->show();
    }

    updateStatus();
}

McuTarget *McuSupportOptionsWidget::currentMcuTarget() const
{
    const int mcuTargetIndex = m_mcuTargetComboBox->currentIndex();
    return m_options->mcuTargets.isEmpty() ? nullptr : m_options->mcuTargets.at(mcuTargetIndex);
}

McuSupportOptionsPage::McuSupportOptionsPage(QObject* parent)
    : Core::IOptionsPage(parent)
{
    setId(Core::Id(Constants::SETTINGS_ID));
    setDisplayName(tr("MCU"));
    setCategory(ProjectExplorer::Constants::DEVICE_SETTINGS_CATEGORY);
}

QWidget *McuSupportOptionsPage::widget()
{
    if (!m_options)
        m_options = new McuSupportOptions(this);
    if (!m_widget)
        m_widget = new McuSupportOptionsWidget(m_options);
    return m_widget;
}

void McuSupportOptionsPage::apply()
{
    for (auto package : m_options->packages)
        package->writeToSettings();

    QTC_ASSERT(m_options->armGccPackage, return);
    QTC_ASSERT(m_options->qtForMCUsSdkPackage, return);

    if (!widget()->isVisible())
        return; // Only create/overwrite kits when this option page is shown

    const McuTarget *mcuTarget = m_widget->currentMcuTarget();
    if (!mcuTarget)
        return;

    using namespace ProjectExplorer;

    for (auto existingKit : m_options->existingKits(mcuTarget))
        ProjectExplorer::KitManager::deregisterKit(existingKit);
    m_options->newKit(mcuTarget);
}

void McuSupportOptionsPage::finish()
{
    delete m_options;
    m_options = nullptr;
    delete m_widget;
}

} // Internal
} // McuSupport