#include <QDebug>
#include <QObject>
#include <QLocale>
#include <QTranslator>
#include <QGuiApplication>
#include <QDir>
#include <QTimeZone>
#include <QDate>
#include "transload.h"

TransLoad::TransLoad(QObject *parent) : QObject(parent)
{
    activeLang = "";

    if(deftrans.load("TR-en_EN.qm", langpath)) {
        qApp->installTranslator(&deftrans);
        QLocale curLocale("en_EN");
        QLocale::setDefault(curLocale);
    }

    reloadTimeZone();

    monthNames.clear();
    dayNames.clear();
}

void TransLoad::reloadTimeZone()
{
    QList<QByteArray> timezones;
    timeZoneIds.clear();
    timezones = QTimeZone::availableTimeZoneIds();
    foreach (QByteArray zone, timezones) {
        //QTimeZone tz(zone);
        //qDebug() << zone << "::" << tz.country() << " " << tz.DefaultName <<  "  " << tz.comment();
        timeZoneIds.append(zone);
    }

    QByteArray systemTimezone = QTimeZone::systemTimeZoneId();
    systemTimeZoneId = systemTimezone;

}

// -------------------------------------------------------------------------------------
// ASSERT:
// lang is rest of filename usually TR_??.qm wher ?? is for 2 cahr country information
void TransLoad::selectLanguage(QString lang)
{
    QString sel_locale;

    if(!trans.isEmpty())
        qApp->removeTranslator(&trans);

    if(trans.load("TR-" + lang + ".qm", langpath)) {
        qDebug() <<"Loaded :: " << lang;
        qApp->installTranslator(&trans);
        activeLang = lang;
        QLocale curLocale(lang);
        QLocale::setDefault(curLocale);
        sel_locale = lang;
    } else {
        qDebug() << "COULD NOT load lang :: "  << lang;
        activeLang = "";
        QLocale curLocale("en_EN");
        QLocale::setDefault(curLocale);
        sel_locale = "en_EN";
    }

    // 0: Januar
    QLocale curLocale(lang);
    monthNames.clear();
    for (int i = 1; i <= 12; i++) {
        QString month = curLocale.standaloneMonthName(i, QLocale::LongFormat);
        monthNames.append(month);
    }

    // 0: Sonntag !!
    dayNames.clear();
    QString day = curLocale.standaloneDayName(7, QLocale::LongFormat);
    dayNames.append(day);
    for (int i = 1; i <= 6; i++) {
        QString day = curLocale.standaloneDayName(i, QLocale::LongFormat);
        dayNames.append(day);
    }
    QString dateTimeFormat = curLocale.dateTimeFormat(QLocale::ShortFormat);
    qDebug() << dateTimeFormat;
    emit languageChanged();
}

// search all FLAGS and extract Languages
// return list of avail Languages
QStringList  TransLoad::getLanguages(void) {
    QDir dir;
    dir.setPath(langpath);
    QStringList filters;
    filters << "FLAG-*.svg";
    QStringList flags;
    flags = dir.entryList(filters);

    QStringList languages;
    foreach (QString flag, flags) {
        QString lang = flag.split("-").at(1);
        languages.append(lang.split(".").at(0));
    }

    return languages;
}

QString TransLoad::getActiveLanguage(void) {
    return activeLang;
}

QStringList TransLoad::getTimeZoneIds(void){
    return timeZoneIds;
}

QString TransLoad::getSystemTimeZoneId(void){
    return systemTimeZoneId;
}

 QStringList TransLoad::getMonthNames(void){
 return monthNames;
 }

 QStringList TransLoad::getDayNames(void){
 return dayNames;
 }
// -------------------------------------------------------------------------------------
//for getting signal on changed translation
QString TransLoad::getEmptyString(){
    return "";
}