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/** LICENSE ********************************************************************
 **
 ** smolbote: yet another qute browser
 ** Copyright (C) 2017  Xian Nox
 **
 ** This program 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.
 **
 ** This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 **
 ******************************************************************************/

#include "settings.h"
#include <QStandardPaths>
#include <fstream>

Settings::Settings(const QString &configFile)
{
    path = configFile;
    std::ifstream ifs(configFile.toStdString().c_str());
    toml::ParseResult pr = toml::parse(ifs);

    if(!pr.valid()) {
        qWarning("Invalid configuration: %s", pr.errorReason.c_str());
        return;
    }

    v = pr.value;
}

Settings::~Settings()
{
}

QString Settings::filePath() const
{
    return path;
}

bool Settings::isEmpty() const
{
    return v.empty();
}

bool Settings::contains(const QString &key)
{
    const toml::Value *x = v.find(key.toStdString());
    if(x) {
        return true;
    } else {
        return false;
    }
}

QVariant Settings::value(const QString &key, const QVariant &defaultValue) const
{
    const toml::Value *x = v.find(key.toStdString());

    // check if value exists
    if(!x) {
        return defaultValue;
    }

    QVariant r;
    switch (x->type()) {
    case toml::Value::NULL_TYPE:
        r = defaultValue;
        break;

    case toml::Value::BOOL_TYPE:
        r = QVariant(x->as<bool>());
        break;

    case toml::Value::INT_TYPE:
        r = QVariant(x->as<int>());
        break;

    case toml::Value::DOUBLE_TYPE:
        r = QVariant(x->as<double>());
        break;

    case toml::Value::STRING_TYPE:
        r = QVariant(QString::fromStdString(x->as<std::string>()));
        break;

    case toml::Value::ARRAY_TYPE:
        r = fromList(x);
        break;

    default:
        qWarning("Unhandled type in configuration");
        r = defaultValue;
        break;
    }

    // check if key is a path, in which case replace '~' with the home location
    if(key.endsWith(QLatin1String("path"), Qt::CaseInsensitive)) {
        QString value = r.toString();
        value.replace('~', QStandardPaths::writableLocation(QStandardPaths::HomeLocation));
        r = QVariant(value);
    }

    return r;
}

QVariant Settings::fromList(const toml::Value *list) const
{
    QStringList l;

    for(const toml::Value &v : list->as<toml::Array>()) {
        // TODO check value type
        l.append(QString::fromStdString(v.as<std::string>()));
    }

    return QVariant(l);
}