#include <QTranslator>
#include <QDir>
#include <QFileInfoList>

#include "qtsingleapplication/qtsingleapplication.h"
#include "core/localization.h"
#include "core/defs.h"
#include "core/settings.h"


Localization::Localization() {
}

QList<Language> Localization::getInstalledLanguages() {
  QList<Language> languages;
  QDir file_dir(APP_LANG_PATH);
  QFileInfoList file_list = file_dir.entryInfoList(QStringList() << "rssguard_*.qm",
                                                   QDir::Files,
                                                   QDir::Name);
  QTranslator translator;

  foreach (QFileInfo file, file_list) {
    if (translator.load(file.absoluteFilePath())) {
      Language new_language;
      new_language.m_name = translator.translate("QObject", "LANG_NAME");
      new_language.m_code = translator.translate("QObject", "LANG_ABBREV");
      new_language.m_version = translator.translate("QObject", "LANG_VERSION");
      new_language.m_author = translator.translate("QObject", "LANG_AUTHOR");
      new_language.m_email = translator.translate("QObject", "LANG_EMAIL");

      languages << new_language;
    }
  }

  return languages;
}

void Localization::set(const QString &locale_name) {
  Settings::getInstance()->setValue(APP_CFG_GEN,
                                    "language",
                                    locale_name);
}

void Localization::load() {
  // Obtain all needed data.
  QString locale_name = Settings::getInstance()->value(APP_CFG_GEN,
                                                       "language",
                                                       "en").toString();
  QTranslator qt_translator, app_translator;

  // Load localizations and setup locales.
  if (app_translator.load(QString("rssguard_%1.qm").arg(locale_name),
                          APP_LANG_PATH)) {
    qDebug("Application localization %s loaded successfully. Setting up locale.",
           qPrintable(locale_name));
    QLocale::setDefault(QLocale(locale_name));
  }
  else {
    qDebug("Application localization %s was not loaded.", qPrintable(locale_name));
  }

  if (qt_translator.load(QString("qt_%1.qm").arg(locale_name),
                         APP_LANG_PATH)) {
    qDebug("Qt localization %s loaded successfully. Setting up locale.",
           qPrintable(locale_name));
    QLocale::setDefault(QLocale(locale_name));
  }
  else {
    qDebug("Qt localization %s was not loaded.", qPrintable(locale_name));
  }
}