#include "translator.h"

#include <QTranslator>
#include <QCoreApplication>
#include <QQmlEngine>
#include <QLocale>
#include <QTimer>

Translator::Translator(QQmlEngine *engine, QObject *parent) :
    QObject(parent),
    mQmlEngine(engine),
    mCurrentTranslator(new QTranslator(this))
{
    mNamesMap =
    {
        {Language::English, tr("EN")},
        {Language::Russian, tr("RU")},
        {Language::Italian, tr("IT")}
    };

    mIconsMap =
    {
        {Language::English, "qrc:/Icons/english-flag.svg"},
        {Language::Russian, "qrc:/Icons/russian-flag.svg"},
        {Language::Italian, "qrc:/Icons/italian-flag.svg"}
    };

    mTranslationsMap =
    {
        {Language::English, ":/cubo_en.qm"},
        {Language::Russian, ":/cubo_ru.qm"},
        {Language::Italian, ":/cubo_it.qm"}
    };

    QCoreApplication::installTranslator(mCurrentTranslator);

    if (QLocale::system().language() == QLocale::Russian)
    {
        setCurrentLanguage(Language::Russian);
    }
    else if (QLocale::system().language() == QLocale::Italian)
    {
        setCurrentLanguage(Language::Italian);
    }
    else
    {
        setCurrentLanguage(Language::English);
    }
}

QString Translator::languageName(Language language) const
{
    return mNamesMap.value(language);
}

QString Translator::languageIcon(Language language) const
{
    return mIconsMap.value(language);
}

Translator::Language Translator::currentLanguage() const
{
    return mCurrentLanguage;
}

void Translator::setCurrentLanguage(Language language)
{
    if (mCurrentTranslator->load(mTranslationsMap.value(language)))
    {
        QTimer::singleShot(0, this, [this]{ mQmlEngine->retranslate();} );
    }

    mCurrentLanguage = language;
    emit currentLanguageChanged();
    emit currentLanguageNameChanged();
    emit currentLanguageIconChanged();
}

QString Translator::currentLanguageName() const
{
    return languageName(mCurrentLanguage);
}

QString Translator::currentLanguageIcon() const
{
    return languageIcon(mCurrentLanguage);
}