// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "cppcodemodelsettingspage.h"

#include "clangdiagnosticconfigsselectionwidget.h"
#include "clangdiagnosticconfigswidget.h"
#include "cppeditorconstants.h"
#include "cppeditortr.h"
#include "cpptoolsreuse.h"

#include <coreplugin/icore.h>

#include <projectexplorer/session.h>

#include <utils/algorithm.h>
#include <utils/infolabel.h>
#include <utils/itemviews.h>
#include <utils/layoutbuilder.h>
#include <utils/pathchooser.h>
#include <utils/qtcassert.h>

#include <QCheckBox>
#include <QComboBox>
#include <QDesktopServices>
#include <QFormLayout>
#include <QGroupBox>
#include <QInputDialog>
#include <QPushButton>
#include <QSpinBox>
#include <QStringListModel>
#include <QTextStream>
#include <QVBoxLayout>
#include <QVersionNumber>
#include <QTextBlock>

#include <limits>

namespace CppEditor::Internal {

class CppCodeModelSettingsWidget final : public Core::IOptionsPageWidget
{
public:
    CppCodeModelSettingsWidget(CppCodeModelSettings *s);

private:
    void apply() final;

    bool applyGeneralWidgetsToSettings() const;

    CppCodeModelSettings *m_settings = nullptr;
    QCheckBox *m_interpretAmbiguousHeadersAsCHeaders;
    QCheckBox *m_ignorePchCheckBox;
    QCheckBox *m_useBuiltinPreprocessorCheckBox;
    QCheckBox *m_skipIndexingBigFilesCheckBox;
    QSpinBox *m_bigFilesLimitSpinBox;
    QCheckBox *m_ignoreFilesCheckBox;
    QPlainTextEdit *m_ignorePatternTextEdit;
};

CppCodeModelSettingsWidget::CppCodeModelSettingsWidget(CppCodeModelSettings *s)
    : m_settings(s)
{
    m_interpretAmbiguousHeadersAsCHeaders
        = new QCheckBox(Tr::tr("Interpret ambiguous headers as C headers"));

    m_skipIndexingBigFilesCheckBox = new QCheckBox(Tr::tr("Do not index files greater than"));
    m_skipIndexingBigFilesCheckBox->setChecked(m_settings->skipIndexingBigFiles());

    m_bigFilesLimitSpinBox = new QSpinBox;
    m_bigFilesLimitSpinBox->setSuffix(Tr::tr("MB"));
    m_bigFilesLimitSpinBox->setRange(1, 500);
    m_bigFilesLimitSpinBox->setValue(m_settings->indexerFileSizeLimitInMb());

    m_ignoreFilesCheckBox = new QCheckBox(Tr::tr("Ignore files"));
    m_ignoreFilesCheckBox->setToolTip(Tr::tr(
        "<html><head/><body><p>Ignore files that match these wildcard patterns, one wildcard per line.</p></body></html>"));

    m_ignoreFilesCheckBox->setChecked(m_settings->ignoreFiles());
    m_ignorePatternTextEdit = new QPlainTextEdit(m_settings->ignorePattern());
    m_ignorePatternTextEdit->setToolTip(m_ignoreFilesCheckBox->toolTip());
    m_ignorePatternTextEdit->setEnabled(m_ignoreFilesCheckBox->isChecked());

    connect(m_ignoreFilesCheckBox, &QCheckBox::stateChanged, [this] {
       m_ignorePatternTextEdit->setEnabled(m_ignoreFilesCheckBox->isChecked());
    });

    m_ignorePchCheckBox = new QCheckBox(Tr::tr("Ignore precompiled headers"));
    m_ignorePchCheckBox->setToolTip(Tr::tr(
        "<html><head/><body><p>When precompiled headers are not ignored, the parsing for code "
        "completion and semantic highlighting will process the precompiled header before "
        "processing any file.</p></body></html>"));

    m_useBuiltinPreprocessorCheckBox = new QCheckBox(Tr::tr("Use built-in preprocessor to show "
                                                            "pre-processed files"));
    m_useBuiltinPreprocessorCheckBox->setToolTip
            (Tr::tr("Uncheck this to invoke the actual compiler "
                    "to show a pre-processed source file in the editor."));

    m_interpretAmbiguousHeadersAsCHeaders->setChecked(
                m_settings->interpretAmbigiousHeadersAsCHeaders());

    m_ignorePchCheckBox->setChecked(m_settings->pchUsage() == CppCodeModelSettings::PchUse_None);
    m_useBuiltinPreprocessorCheckBox->setChecked(m_settings->useBuiltinPreprocessor());

    using namespace Utils::Layouting;

    Column {
        Group {
            title(Tr::tr("General")),
            Column {
                m_interpretAmbiguousHeadersAsCHeaders,
                m_ignorePchCheckBox,
                m_useBuiltinPreprocessorCheckBox,
                Row { m_skipIndexingBigFilesCheckBox, m_bigFilesLimitSpinBox, st },
                Row { Column { m_ignoreFilesCheckBox, st }, m_ignorePatternTextEdit },
            }
        },
        st
    }.attachTo(this);
}

void CppCodeModelSettingsWidget::apply()
{
    if (applyGeneralWidgetsToSettings())
        m_settings->toSettings(Core::ICore::settings());
}

bool CppCodeModelSettingsWidget::applyGeneralWidgetsToSettings() const
{
    bool settingsChanged = false;

    const bool newInterpretAmbiguousHeaderAsCHeaders
            = m_interpretAmbiguousHeadersAsCHeaders->isChecked();
    if (m_settings->interpretAmbigiousHeadersAsCHeaders()
            != newInterpretAmbiguousHeaderAsCHeaders) {
        m_settings->setInterpretAmbigiousHeadersAsCHeaders(newInterpretAmbiguousHeaderAsCHeaders);
        settingsChanged = true;
    }

    const bool newSkipIndexingBigFiles = m_skipIndexingBigFilesCheckBox->isChecked();
    if (m_settings->skipIndexingBigFiles() != newSkipIndexingBigFiles) {
        m_settings->setSkipIndexingBigFiles(newSkipIndexingBigFiles);
        settingsChanged = true;
    }
    const bool newUseBuiltinPreprocessor = m_useBuiltinPreprocessorCheckBox->isChecked();
    if (m_settings->useBuiltinPreprocessor() != newUseBuiltinPreprocessor) {
        m_settings->setUseBuiltinPreprocessor(newUseBuiltinPreprocessor);
        settingsChanged = true;
    }
    const bool ignoreFiles = m_ignoreFilesCheckBox->isChecked();
    if (m_settings->ignoreFiles() != ignoreFiles) {
        m_settings->setIgnoreFiles(ignoreFiles);
        settingsChanged = true;
    }
    const QString ignorePattern = m_ignorePatternTextEdit->toPlainText();
    if (m_settings->ignorePattern() != ignorePattern) {
        m_settings->setIgnorePattern(ignorePattern);
        settingsChanged = true;
    }
    const int newFileSizeLimit = m_bigFilesLimitSpinBox->value();
    if (m_settings->indexerFileSizeLimitInMb() != newFileSizeLimit) {
        m_settings->setIndexerFileSizeLimitInMb(newFileSizeLimit);
        settingsChanged = true;
    }

    const bool newIgnorePch = m_ignorePchCheckBox->isChecked();
    const bool previousIgnorePch = m_settings->pchUsage() == CppCodeModelSettings::PchUse_None;
    if (newIgnorePch != previousIgnorePch) {
        const CppCodeModelSettings::PCHUsage pchUsage = m_ignorePchCheckBox->isChecked()
                ? CppCodeModelSettings::PchUse_None
                : CppCodeModelSettings::PchUse_BuildSystem;
        m_settings->setPCHUsage(pchUsage);
        settingsChanged = true;
    }

    return settingsChanged;
}

CppCodeModelSettingsPage::CppCodeModelSettingsPage(CppCodeModelSettings *settings)
{
    setId(Constants::CPP_CODE_MODEL_SETTINGS_ID);
    setDisplayName(Tr::tr("Code Model"));
    setCategory(Constants::CPP_SETTINGS_CATEGORY);
    setDisplayCategory(Tr::tr("C++"));
    setCategoryIconPath(":/projectexplorer/images/settingscategory_cpp.png");
    setWidgetCreator([settings] { return new CppCodeModelSettingsWidget(settings); });
}

class ClangdSettingsWidget::Private
{
public:
    QCheckBox useClangdCheckBox;
    QComboBox indexingComboBox;
    QCheckBox autoIncludeHeadersCheckBox;
    QCheckBox sizeThresholdCheckBox;
    QSpinBox threadLimitSpinBox;
    QSpinBox documentUpdateThreshold;
    QSpinBox sizeThresholdSpinBox;
    QSpinBox completionResults;
    Utils::PathChooser clangdChooser;
    Utils::InfoLabel versionWarningLabel;
    ClangDiagnosticConfigsSelectionWidget *configSelectionWidget = nullptr;
    QGroupBox *sessionsGroupBox = nullptr;
    QStringListModel sessionsModel;
};

ClangdSettingsWidget::ClangdSettingsWidget(const ClangdSettings::Data &settingsData,
                                           bool isForProject)
    : d(new Private)
{
    const ClangdSettings settings(settingsData);
    const QString indexingToolTip = Tr::tr(
        "If background indexing is enabled, global symbol searches will yield\n"
        "more accurate results, at the cost of additional CPU load when\n"
        "the project is first opened.\n"
        "The indexing result is persisted in the project's build directory.\n"
        "\n"
        "If you disable background indexing, a faster, but less accurate,\n"
        "built-in indexer is used instead.\n"
        "\n"
        "The thread priority for building the background index can be adjusted since clangd 15.\n"
        "Background Priority: Minimum priority, runs on idle CPUs. May leave 'performance' cores "
        "unused.\n"
        "Normal Priority: Reduced priority compared to interactive work.\n"
        "Low Priority: Same priority as other clangd work.");
    const QString workerThreadsToolTip = Tr::tr(
        "Number of worker threads used by clangd. Background indexing also uses this many "
        "worker threads.");
    const QString autoIncludeToolTip = Tr::tr(
        "Controls whether clangd may insert header files as part of symbol completion.");
    const QString documentUpdateToolTip = Tr::tr(
        "Defines the amount of time Qt Creator waits before sending document changes to the "
        "server.\n"
        "If the document changes again while waiting, this timeout resets.");
    const QString sizeThresholdToolTip = Tr::tr(
        "Files greater than this will not be opened as documents in clangd.\n"
        "The built-in code model will handle highlighting, completion and so on.");
    const QString completionResultToolTip = Tr::tr(
        "The maximum number of completion results returned by clangd.");

    d->useClangdCheckBox.setText(Tr::tr("Use clangd"));
    d->useClangdCheckBox.setChecked(settings.useClangd());
    d->clangdChooser.setExpectedKind(Utils::PathChooser::ExistingCommand);
    d->clangdChooser.setFilePath(settings.clangdFilePath());
    d->clangdChooser.setAllowPathFromDevice(true);
    d->clangdChooser.setEnabled(d->useClangdCheckBox.isChecked());
    using Priority = ClangdSettings::IndexingPriority;
    for (Priority prio : {Priority::Off, Priority::Background, Priority::Low, Priority::Normal}) {
        d->indexingComboBox.addItem(ClangdSettings::priorityToDisplayString(prio), int(prio));
        if (prio == settings.indexingPriority())
            d->indexingComboBox.setCurrentIndex(d->indexingComboBox.count() - 1);
    }
    d->indexingComboBox.setToolTip(indexingToolTip);
    d->autoIncludeHeadersCheckBox.setText(Tr::tr("Insert header files on completion"));
    d->autoIncludeHeadersCheckBox.setChecked(settings.autoIncludeHeaders());
    d->autoIncludeHeadersCheckBox.setToolTip(autoIncludeToolTip);
    d->threadLimitSpinBox.setValue(settings.workerThreadLimit());
    d->threadLimitSpinBox.setSpecialValueText("Automatic");
    d->threadLimitSpinBox.setToolTip(workerThreadsToolTip);
    d->documentUpdateThreshold.setMinimum(50);
    d->documentUpdateThreshold.setMaximum(10000);
    d->documentUpdateThreshold.setValue(settings.documentUpdateThreshold());
    d->documentUpdateThreshold.setSingleStep(100);
    d->documentUpdateThreshold.setSuffix(" ms");
    d->documentUpdateThreshold.setToolTip(documentUpdateToolTip);
    d->sizeThresholdCheckBox.setText(Tr::tr("Ignore files greater than"));
    d->sizeThresholdCheckBox.setChecked(settings.sizeThresholdEnabled());
    d->sizeThresholdCheckBox.setToolTip(sizeThresholdToolTip);
    d->sizeThresholdSpinBox.setMinimum(1);
    d->sizeThresholdSpinBox.setMaximum(std::numeric_limits<int>::max());
    d->sizeThresholdSpinBox.setSuffix(" KB");
    d->sizeThresholdSpinBox.setValue(settings.sizeThresholdInKb());
    d->sizeThresholdSpinBox.setToolTip(sizeThresholdToolTip);

    const auto completionResultsLabel = new QLabel(Tr::tr("Completion results:"));
    completionResultsLabel->setToolTip(completionResultToolTip);
    d->completionResults.setMinimum(0);
    d->completionResults.setMaximum(std::numeric_limits<int>::max());
    d->completionResults.setValue(settings.completionResults());
    d->completionResults.setToolTip(completionResultToolTip);
    d->completionResults.setSpecialValueText(Tr::tr("No limit"));

    const auto layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(&d->useClangdCheckBox);

    const auto formLayout = new QFormLayout;
    const auto chooserLabel = new QLabel(Tr::tr("Path to executable:"));
    formLayout->addRow(chooserLabel, &d->clangdChooser);
    formLayout->addRow(QString(), &d->versionWarningLabel);

    const auto indexingPriorityLayout = new QHBoxLayout;
    indexingPriorityLayout->addWidget(&d->indexingComboBox);
    indexingPriorityLayout->addStretch(1);
    const auto indexingPriorityLabel = new QLabel(Tr::tr("Background indexing:"));
    indexingPriorityLabel->setToolTip(indexingToolTip);
    formLayout->addRow(indexingPriorityLabel, indexingPriorityLayout);

    const auto threadLimitLayout = new QHBoxLayout;
    threadLimitLayout->addWidget(&d->threadLimitSpinBox);
    threadLimitLayout->addStretch(1);
    const auto threadLimitLabel = new QLabel(Tr::tr("Worker thread count:"));
    threadLimitLabel->setToolTip(workerThreadsToolTip);
    formLayout->addRow(threadLimitLabel, threadLimitLayout);

    formLayout->addRow(QString(), &d->autoIncludeHeadersCheckBox);
    const auto limitResultsLayout = new QHBoxLayout;
    limitResultsLayout->addWidget(&d->completionResults);
    limitResultsLayout->addStretch(1);
    formLayout->addRow(completionResultsLabel, limitResultsLayout);

    const auto documentUpdateThresholdLayout = new QHBoxLayout;
    documentUpdateThresholdLayout->addWidget(&d->documentUpdateThreshold);
    documentUpdateThresholdLayout->addStretch(1);
    const auto documentUpdateThresholdLabel = new QLabel(Tr::tr("Document update threshold:"));
    documentUpdateThresholdLabel->setToolTip(documentUpdateToolTip);
    formLayout->addRow(documentUpdateThresholdLabel, documentUpdateThresholdLayout);
    const auto sizeThresholdLayout = new QHBoxLayout;
    sizeThresholdLayout->addWidget(&d->sizeThresholdSpinBox);
    sizeThresholdLayout->addStretch(1);
    formLayout->addRow(&d->sizeThresholdCheckBox, sizeThresholdLayout);

    d->configSelectionWidget = new ClangDiagnosticConfigsSelectionWidget(formLayout);
    d->configSelectionWidget->refresh(
                diagnosticConfigsModel(settings.customDiagnosticConfigs()),
                settings.diagnosticConfigId(),
                [](const ClangDiagnosticConfigs &configs, const Utils::Id &configToSelect) {
                    return new CppEditor::ClangDiagnosticConfigsWidget(configs, configToSelect);
                });

    layout->addLayout(formLayout);
    if (!isForProject) {
        d->sessionsModel.setStringList(settingsData.sessionsWithOneClangd);
        d->sessionsModel.sort(0);
        d->sessionsGroupBox = new QGroupBox(Tr::tr("Sessions with a single clangd instance"));
        const auto sessionsView = new Utils::ListView;
        sessionsView->setModel(&d->sessionsModel);
        sessionsView->setToolTip(
                    Tr::tr("By default, Qt Creator runs one clangd process per project.\n"
                       "If you have sessions with tightly coupled projects that should be\n"
                       "managed by the same clangd process, add them here."));
        const auto outerSessionsLayout = new QHBoxLayout;
        const auto innerSessionsLayout = new QHBoxLayout(d->sessionsGroupBox);
        const auto buttonsLayout = new QVBoxLayout;
        const auto addButton = new QPushButton(Tr::tr("Add ..."));
        const auto removeButton = new QPushButton(Tr::tr("Remove"));
        buttonsLayout->addWidget(addButton);
        buttonsLayout->addWidget(removeButton);
        buttonsLayout->addStretch(1);
        innerSessionsLayout->addWidget(sessionsView);
        innerSessionsLayout->addLayout(buttonsLayout);
        outerSessionsLayout->addWidget(d->sessionsGroupBox);
        outerSessionsLayout->addStretch(1);

        const auto separator = new QFrame;
        separator->setFrameShape(QFrame::HLine);
        layout->addWidget(separator);
        layout->addLayout(outerSessionsLayout);

        const auto updateRemoveButtonState = [removeButton, sessionsView] {
            removeButton->setEnabled(sessionsView->selectionModel()->hasSelection());
        };
        connect(sessionsView->selectionModel(), &QItemSelectionModel::selectionChanged,
                this, updateRemoveButtonState);
        updateRemoveButtonState();
        connect(removeButton, &QPushButton::clicked, this, [this, sessionsView] {
            const QItemSelection selection = sessionsView->selectionModel()->selection();
            QTC_ASSERT(!selection.isEmpty(), return);
            d->sessionsModel.removeRow(selection.indexes().first().row());
        });

        connect(addButton, &QPushButton::clicked, this, [this, sessionsView] {
            QInputDialog dlg(sessionsView);
            QStringList sessions = ProjectExplorer::SessionManager::sessions();
            QStringList currentSessions = d->sessionsModel.stringList();
            for (const QString &s : std::as_const(currentSessions))
                sessions.removeOne(s);
            if (sessions.isEmpty())
                return;
            sessions.sort();
            dlg.setLabelText(Tr::tr("Choose a session:"));
            dlg.setComboBoxItems(sessions);
            if (dlg.exec() == QDialog::Accepted) {
                currentSessions << dlg.textValue();
                d->sessionsModel.setStringList(currentSessions);
                d->sessionsModel.sort(0);
            }
        });
    }

    const auto configFilesHelpLabel = new QLabel;
    configFilesHelpLabel->setText(Tr::tr("Additional settings are available via "
            "<a href=\"https://clangd.llvm.org/config\"> clangd configuration files</a>.<br>"
            "User-specific settings go <a href=\"%1\">here</a>, "
            "project-specific settings can be configured by putting a .clangd file into "
            "the project source tree.")
                .arg(ClangdSettings::clangdUserConfigFilePath().toUserOutput()));
    configFilesHelpLabel->setWordWrap(true);
    connect(configFilesHelpLabel, &QLabel::linkHovered, configFilesHelpLabel, &QLabel::setToolTip);
    connect(configFilesHelpLabel, &QLabel::linkActivated, [](const QString &link) {
        if (link.startsWith("https"))
            QDesktopServices::openUrl(link);
        else
            Core::EditorManager::openEditor(Utils::FilePath::fromString(link));
    });
    layout->addWidget(Utils::Layouting::createHr());
    layout->addWidget(configFilesHelpLabel);

    layout->addStretch(1);

    static const auto setWidgetsEnabled = [](QLayout *layout, bool enabled, const auto &f) -> void {
        for (int i = 0; i < layout->count(); ++i) {
            if (QWidget * const w = layout->itemAt(i)->widget())
                w->setEnabled(enabled);
            else if (QLayout * const l = layout->itemAt(i)->layout())
                f(l, enabled, f);
        }
    };
    const auto toggleEnabled = [this, formLayout](const bool checked) {
        setWidgetsEnabled(formLayout, checked, setWidgetsEnabled);
        if (d->sessionsGroupBox)
            d->sessionsGroupBox->setEnabled(checked);
    };
    connect(&d->useClangdCheckBox, &QCheckBox::toggled, toggleEnabled);
    toggleEnabled(d->useClangdCheckBox.isChecked());
    d->threadLimitSpinBox.setEnabled(d->useClangdCheckBox.isChecked());

    d->versionWarningLabel.setType(Utils::InfoLabel::Warning);
    const auto updateWarningLabel = [this] {
        class WarningLabelSetter {
        public:
            WarningLabelSetter(QLabel &label) : m_label(label) { m_label.clear(); }
            ~WarningLabelSetter() { m_label.setVisible(!m_label.text().isEmpty()); }
            void setWarning(const QString &text) { m_label.setText(text); }
        private:
            QLabel &m_label;
        };
        WarningLabelSetter labelSetter(d->versionWarningLabel);

        if (!d->clangdChooser.isValid())
            return;
        const Utils::FilePath clangdPath = d->clangdChooser.filePath();
        QString errorMessage;
        if (!Utils::checkClangdVersion(clangdPath, &errorMessage))
            labelSetter.setWarning(errorMessage);
    };
    connect(&d->clangdChooser, &Utils::PathChooser::textChanged, this, updateWarningLabel);
    updateWarningLabel();

    connect(&d->useClangdCheckBox, &QCheckBox::toggled,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->indexingComboBox, &QComboBox::currentIndexChanged,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->autoIncludeHeadersCheckBox, &QCheckBox::toggled,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->threadLimitSpinBox, &QSpinBox::valueChanged,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->sizeThresholdCheckBox, &QCheckBox::toggled,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->sizeThresholdSpinBox, &QSpinBox::valueChanged,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->documentUpdateThreshold, &QSpinBox::valueChanged,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->clangdChooser, &Utils::PathChooser::textChanged,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(d->configSelectionWidget, &ClangDiagnosticConfigsSelectionWidget::changed,
            this, &ClangdSettingsWidget::settingsDataChanged);
    connect(&d->completionResults, &QSpinBox::valueChanged,
            this, &ClangdSettingsWidget::settingsDataChanged);
}

ClangdSettingsWidget::~ClangdSettingsWidget()
{
    delete d;
}

ClangdSettings::Data ClangdSettingsWidget::settingsData() const
{
    ClangdSettings::Data data;
    data.useClangd = d->useClangdCheckBox.isChecked();
    data.executableFilePath = d->clangdChooser.filePath();
    data.indexingPriority = ClangdSettings::IndexingPriority(
        d->indexingComboBox.currentData().toInt());
    data.autoIncludeHeaders = d->autoIncludeHeadersCheckBox.isChecked();
    data.workerThreadLimit = d->threadLimitSpinBox.value();
    data.documentUpdateThreshold = d->documentUpdateThreshold.value();
    data.sizeThresholdEnabled = d->sizeThresholdCheckBox.isChecked();
    data.sizeThresholdInKb = d->sizeThresholdSpinBox.value();
    data.sessionsWithOneClangd = d->sessionsModel.stringList();
    data.customDiagnosticConfigs = d->configSelectionWidget->customConfigs();
    data.diagnosticConfigId = d->configSelectionWidget->currentConfigId();
    data.completionResults = d->completionResults.value();
    return data;
}

class ClangdSettingsPageWidget final : public Core::IOptionsPageWidget
{
public:
    ClangdSettingsPageWidget() : m_widget(ClangdSettings::instance().data(), false)
    {
        const auto layout = new QVBoxLayout(this);
        layout->addWidget(&m_widget);
    }

private:
    void apply() final { ClangdSettings::instance().setData(m_widget.settingsData()); }

    ClangdSettingsWidget m_widget;
};

ClangdSettingsPage::ClangdSettingsPage()
{
    setId(Constants::CPP_CLANGD_SETTINGS_ID);
    setDisplayName(Tr::tr("Clangd"));
    setCategory(Constants::CPP_SETTINGS_CATEGORY);
    setWidgetCreator([] { return new ClangdSettingsPageWidget; });
}


class ClangdProjectSettingsWidget::Private
{
public:
    Private(const ClangdProjectSettings &s) : settings(s), widget(s.settings(), true) {}

    ClangdProjectSettings settings;
    ClangdSettingsWidget widget;
    QCheckBox useGlobalSettingsCheckBox;
};

ClangdProjectSettingsWidget::ClangdProjectSettingsWidget(const ClangdProjectSettings &settings)
    : d(new Private(settings))
{
    setGlobalSettingsId(Constants::CPP_CLANGD_SETTINGS_ID);
    const auto layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(&d->widget);

    const auto updateGlobalSettingsCheckBox = [this] {
        if (ClangdSettings::instance().granularity() == ClangdSettings::Granularity::Session) {
            setUseGlobalSettingsCheckBoxEnabled(false);
            setUseGlobalSettings(true);
        } else {
            setUseGlobalSettingsCheckBoxEnabled(true);
            setUseGlobalSettings(d->settings.useGlobalSettings());
        }
        d->widget.setEnabled(!useGlobalSettings());
    };

    updateGlobalSettingsCheckBox();
    connect(&ClangdSettings::instance(), &ClangdSettings::changed,
            this, updateGlobalSettingsCheckBox);

    connect(this, &ProjectSettingsWidget::useGlobalSettingsChanged, this,
            [this](bool checked) {
                d->widget.setEnabled(!checked);
                d->settings.setUseGlobalSettings(checked);
                if (!checked)
                    d->settings.setSettings(d->widget.settingsData());
            });

    connect(&d->widget, &ClangdSettingsWidget::settingsDataChanged, this, [this] {
        d->settings.setSettings(d->widget.settingsData());
    });
}

ClangdProjectSettingsWidget::~ClangdProjectSettingsWidget()
{
    delete d;
}

} // CppEditor::Internal
