/* === This file is part of Calamares - <https://github.com/calamares> ===
 *
 *   Copyright 2014-2016, Teo Mrnjavac <teo@kde.org>
 *
 *   Originally from the Manjaro Installation Framework
 *   by Roland Singer <roland@manjaro.org>
 *   Copyright (C) 2007 Free Software Foundation, Inc.
 *
 *   Calamares is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Calamares is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
 */

#include "localeglobal.h"

#include <QTimeZone>

//###
//### Private variables
//###

QHash<QString, QHash<QString, QList<LocaleGlobal::Locale> > > LocaleGlobal::locales;
QHash<QString, QList<LocaleGlobal::Location> > LocaleGlobal::locations;


//###
//### Public methods
//###


QString
LocaleGlobal::Location::pretty( const QString& s )
{
    return QString( s ).replace( '_', ' ' ).simplified();
}


QString
LocaleGlobal::Location::comment() const
{
    QTimeZone qtz = QTimeZone( QString( "%1/%2" )
                                    .arg( region )
                                    .arg( zone ).toLatin1() );
    return qtz.comment();
}


void
LocaleGlobal::init() {
    // TODO: Error handling
    initLocales();
    initLocations();
}



QHash< QString, QHash< QString, QList< LocaleGlobal::Locale > > >
LocaleGlobal::getLocales() {
    return locales;
}



QHash< QString, QList< LocaleGlobal::Location > >
LocaleGlobal::getLocations() {
    return locations;
}


//###
//### Private methods
//###


void
LocaleGlobal::initLocales() {
    locales.clear();

    QStringList files = QDir(LOCALESDIR).entryList(QDir::Files, QDir::Name);

    for (int i = 0; i < files.size(); ++i) {
        QString filename = files.at(i);
        QFile file(QString(LOCALESDIR) + "/" + filename);
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
            continue;

        QTextStream in(&file);
        QString commentChar = "%";
        Locale locale;
        QString lang, territory;

        locale.locale = filename;

        while (!in.atEnd()) {
            QString line = in.readLine().trimmed();
            QStringList split = line.split(commentChar, QString::KeepEmptyParts).first().split(QRegExp(" (?=[^\"]*(\"[^\"]*\"[^\"]*)*$)"), QString::SkipEmptyParts);

            if (split.size() < 2)
                continue;

            QString sub1 = QString(split.at(0)).remove("\"");
            QString sub2 = QString(split.at(1)).remove("\"");

            if (sub1 == "comment_char")
                commentChar = sub2;
            else if (sub1 == "title")
                locale.description = sub2;
            else if (sub1 == "territory")
                territory= sub2;
            else if (sub1 == "language")
                lang = sub2;
        }

        if (lang.isEmpty() || territory.isEmpty())
            continue;

        locales[lang][territory].append(locale);
    }
}



void
LocaleGlobal::initLocations() {
    locations.clear();

    QFile file(TZ_DATA_FILE);
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        return;

    QTextStream in(&file);
    while (!in.atEnd()) {
        QString line = in.readLine().trimmed().split('#', QString::KeepEmptyParts).first().trimmed();
        if (line.isEmpty())
            continue;

        QStringList list = line.split(QRegExp("[\t ]"), QString::SkipEmptyParts);
        if (list.size() < 3)
            continue;

        Location location;
        QStringList timezoneParts = list.at(2).split('/', QString::SkipEmptyParts);
        int cooSplitPos = QString(list.at(1)).remove(0, 1).indexOf(QRegExp("[-+]")) + 1;

        if (timezoneParts.size() < 2)
            continue;

        QString countryCode = list.at(0).trimmed();
        if (countryCode.size() != 2)
            continue;

        location.region = timezoneParts.takeFirst();
        location.zone = timezoneParts.join( '/' );
        location.latitude = getRightGeoLocation(list.at(1).mid(0, cooSplitPos));
        location.longitude = getRightGeoLocation(list.at(1).mid(cooSplitPos));
        location.country = countryCode;

        locations[location.region].append(location);
    }
}



double
LocaleGlobal::getRightGeoLocation(QString str) {
    double sign = 1, num = 0.00;

    // Determind sign
    if (str.startsWith('-')) {
        sign = -1;
        str.remove(0, 1);
    }
    else if (str.startsWith('+')) {
        str.remove(0, 1);
    }


    if (str.length() == 4 || str.length() == 6)
        num = str.mid(0, 2).toDouble() + str.mid(2, 2).toDouble() / 60;
    else if (str.length() == 5 || str.length() == 7)
        num = str.mid(0, 3).toDouble() + str.mid(3, 2).toDouble() / 60;

    return sign * num;
}