#include "TranslationHelper.h"

#include <QCoreApplication>
#include <QDir>

namespace
{
constexpr auto kSimplifiedChineseCatalog =
    ":/simcae/update-client/i18n/update-client_zh_CN.qm";
constexpr auto kQtSimplifiedChineseCatalog = "translations/qt_zh_CN.qm";

bool usesSimplifiedChinese(const QLocale& locale)
{
    if (locale.language() != QLocale::Chinese ||
        locale.script() == QLocale::TraditionalHanScript)
    {
        return false;
    }

    return locale.script() == QLocale::SimplifiedHanScript ||
           locale.country() == QLocale::China ||
           locale.country() == QLocale::Singapore;
}
}

TranslationHelper::TranslationHelper()
{
    m_simplifiedChineseCatalog.load(
        QString::fromLatin1(kSimplifiedChineseCatalog));
}

bool TranslationHelper::installForSystemLocale()
{
    if (!usesSimplifiedChinese(QLocale::system()) ||
        m_simplifiedChineseCatalog.isEmpty())
    {
        return false;
    }

    const QString qtCatalogPath = QDir(QCoreApplication::applicationDirPath())
                                      .filePath(QString::fromLatin1(
                                          kQtSimplifiedChineseCatalog));
    if (m_qtSimplifiedChineseCatalog.load(qtCatalogPath))
        QCoreApplication::installTranslator(&m_qtSimplifiedChineseCatalog);

    return QCoreApplication::installTranslator(&m_simplifiedChineseCatalog);
}

QString TranslationHelper::translate(const char* context,
                                     const char* sourceText) const
{
    return m_simplifiedChineseCatalog.translate(context, sourceText);
}