// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "translationwizardpage.h"

#include "qtsupporttr.h"

#include <projectexplorer/jsonwizard/jsonwizard.h>
#include <projectexplorer/jsonwizard/jsonwizardpagefactory.h>
#include <projectexplorer/project.h>
#include <projectexplorer/projectmanager.h>

#include <utils/algorithm.h>
#include <utils/fileutils.h>
#include <utils/macroexpander.h>
#include <utils/wizardpage.h>

#include <QComboBox>
#include <QFormLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QLocale>
#include <QPair>
#include <QVBoxLayout>

#include <algorithm>

using namespace Core;
using namespace ProjectExplorer;
using namespace Utils;

namespace QtSupport::Internal {

class TranslationWizardPage final : public WizardPage
{
public:
    TranslationWizardPage(const QString &enabledExpr, bool singleFile);

private:
    void initializePage() final;
    bool isComplete() const final;
    bool validatePage() final;

    QString tsBaseName() const { return m_fileNameLineEdit.text(); }
    void updateLineEdit();

    QComboBox m_languageComboBox;
    QLineEdit m_fileNameLineEdit;
    const QString m_enabledExpr;
    const bool m_isProjectWizard;
};

TranslationWizardPage::TranslationWizardPage(const QString &enabledExpr, bool singleFile)
    : m_enabledExpr(enabledExpr)
    , m_isProjectWizard(!singleFile)
{
    const auto mainLayout = new QVBoxLayout(this);
    const auto descriptionLabel = new QLabel(
                singleFile ? Tr::tr("Select a language for which a corresponding "
                                    "translation (.ts) file will be generated for you.")
                           : Tr::tr("If you plan to provide translations for your project's "
                                    "user interface via the Qt Linguist tool, select a "
                                    "language here. A corresponding translation (.ts) file will be "
                                    "generated for you."));
    descriptionLabel->setWordWrap(true);
    mainLayout->addWidget(descriptionLabel);
    const auto formLayout = new QFormLayout;
    mainLayout->addLayout(formLayout);
    m_languageComboBox.addItem(Tr::tr("<none>"));
    QList<QLocale> allLocales = QLocale::matchingLocales(
                QLocale::AnyLanguage, QLocale::AnyScript, QLocale::AnyCountry);
    allLocales.removeOne(QLocale::C);
    using LocalePair = QPair<QString, QString>;
    auto localeStrings = transform<QList<LocalePair>>(allLocales,
                [](const QLocale &l) {
                    const QString displayName = QLocale::languageToString(l.language()).append(" (")
                            .append(QLocale::territoryToString(l.territory())).append(')');
                    const QString tsFileBaseName = l.name();
                    return qMakePair(displayName, tsFileBaseName);
                });
    sort(localeStrings, [](const LocalePair &l1, const LocalePair &l2) {
        return l1.first < l2.first; });
    localeStrings.erase(std::unique(localeStrings.begin(), localeStrings.end()),
                        localeStrings.end());
    for (const LocalePair &lp : std::as_const(localeStrings))
        m_languageComboBox.addItem(lp.first, lp.second);
    formLayout->addRow(Tr::tr("Language:"), &m_languageComboBox);
    const auto fileNameLayout = new QHBoxLayout;
    m_fileNameLineEdit.setReadOnly(true);
    fileNameLayout->addWidget(&m_fileNameLineEdit);
    fileNameLayout->addStretch(1);
    formLayout->addRow(Tr::tr("Translation file:"), fileNameLayout);
    connect(&m_languageComboBox, &QComboBox::currentIndexChanged,
            this, &TranslationWizardPage::updateLineEdit);
}

void TranslationWizardPage::initializePage()
{
    const bool isEnabled = m_enabledExpr.isEmpty()
            || static_cast<JsonWizard *>(wizard())->expander()->expand(m_enabledExpr) == "yes";
    setEnabled(isEnabled);
    if (!isEnabled)
        m_languageComboBox.setCurrentIndex(0);
    updateLineEdit();
}

bool TranslationWizardPage::isComplete() const
{
    if (m_isProjectWizard)
        return m_languageComboBox.currentIndex() == 0 || !tsBaseName().isEmpty();
    return m_languageComboBox.currentIndex() > 0 && !tsBaseName().isEmpty();
}

bool TranslationWizardPage::validatePage()
{
    const auto w = static_cast<JsonWizard *>(wizard());
    w->setValue("TsFileName", tsBaseName().isEmpty() ? QString() : QString(tsBaseName() + ".ts"));
    w->setValue("TsLanguage", m_languageComboBox.currentData().toString());
    return true;
}

void TranslationWizardPage::updateLineEdit()
{
    m_fileNameLineEdit.setEnabled(m_languageComboBox.currentIndex() != 0);
    if (m_fileNameLineEdit.isEnabled()) {
        auto jsonWizard = static_cast<JsonWizard *>(wizard());
        QString projectName = jsonWizard->stringValue("ProjectName");
        if (!m_isProjectWizard && projectName.isEmpty()) {
            if (auto project = ProjectManager::startupProject())
                projectName = FileUtils::fileSystemFriendlyName(project->displayName());
            else
                projectName = FilePath::fromUserInput(jsonWizard->stringValue("InitialPath")).baseName();
        }
        m_fileNameLineEdit.setText(projectName + '_' + m_languageComboBox.currentData().toString());
    } else {
        m_fileNameLineEdit.clear();
        m_fileNameLineEdit.setPlaceholderText(Tr::tr("<none>"));
    }
    emit completeChanged();
}

class TranslationWizardPageFactory final : public JsonWizardPageFactory
{
public:
    TranslationWizardPageFactory()
    {
        setTypeIdsSuffix("QtTranslation");
    }

private:
    WizardPage *create(JsonWizard *wizard, Id typeId, const QVariant &data) final
    {
        Q_UNUSED(wizard)
        Q_UNUSED(typeId)
        return new TranslationWizardPage(data.toMap().value("enabled").toString(),
                                         data.toMap().value("singleFile").toBool());
    }

    Result<> validateData(Id, const QVariant &) final { return ResultOk; }
};

void setupTranslationWizardPage()
{
    static TranslationWizardPageFactory theTranslationWizardPageFactory;
}

} // QtSupport::Internal