/*
 * Copyright 2008-2009 Ben Boeckel <MathStuf@gmail.com>
 * 
 * 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/>.
 */

// Header include
#include "Config.h"

// Qt includes
#include <QtCore/QSet>

Sigscript::Config::Config(Config* parent) :
        QObject(parent),
        m_lock(QReadWriteLock::Recursive),
        m_parent(parent)
{
}

void Sigscript::Config::addValue(const QString& name, const QVariant& value, const Options options)
{
    if (!m_values.contains(name))
    {
        emit(valueAdded(name, value));
        setValue(name, value, options);
    }
}

void Sigscript::Config::setValue(const QString& name, const QVariant& value, const Options options)
{
    QWriteLocker locker(&m_lock);
    QVariant oldValue = m_values[name].first;
    m_values[name] = Value(value, options);
    emit(valueChanged(name, oldValue, value));
}

void Sigscript::Config::setOptions(const QString& name, const Options options)
{
    QWriteLocker locker(&m_lock);
    const Options oldOptions = m_values[name].second;
    m_values[name].second |= options;
    emit(optionsChanged(name, oldOptions, options));
}

void Sigscript::Config::unsetOptions(const QString& name, const Options options)
{
    QWriteLocker locker(&m_lock);
    const Options oldOptions = m_values[name].second;
    m_values[name].second |= ~options;
    emit(optionsChanged(name, oldOptions, options));
}

void Sigscript::Config::removeValue(const QString& name, const bool shadow)
{
    QWriteLocker locker(&m_lock);
    if (shadow)
        m_values[name].second |= Deleted;
    else
        m_values.remove(name);
    emit(valueRemoved(name));
}

QVariant Sigscript::Config::value(const QString& name, const bool recursive) const
{
    QReadLocker locker(&m_lock);
    if (m_values.contains(name))
    {
        if (m_values[name].second & (Deleted | Hidden))
            return QVariant();
        return m_values[name].first;
    }
    if (recursive)
    {
        Config* par = m_parent;
        while (par)
        {
            if (par->hasValue(name))
                return par->value(name);
            par = par->m_parent;
        }
    }
    return QVariant();
}

bool Sigscript::Config::hasValue(const QString& name, const bool recursive) const
{
    QReadLocker locker(&m_lock);
    if (m_values.contains(name))
        return !(m_values[name].second & (Deleted | Hidden));
    if (recursive)
        return m_parent->hasValue(name, true);
    return false;
}

QStringList Sigscript::Config::values(const bool recursive) const
{
    QStringList values = m_values.keys();
    if (recursive && m_parent)
        values += m_parent->values(true);
    foreach (const QString& value, values)
    {
        if (m_values.contains(value) && (m_values[value].second & (Deleted | Hidden)))
            values.removeAll(value);
    }
    return values.toSet().toList();
}

void Sigscript::Config::clean()
{
    QWriteLocker locker(&m_lock);
    for (QMutableMapIterator<QString, Value> i(m_values); i.hasNext(); i.next())
    {
        if (i.value().second & Temporary)
        {
            i.remove();
            continue;
        }
        i.value().second &= ~Hidden;
    }
}

void Sigscript::Config::writeBack()
{
    QWriteLocker locker(&m_lock);
}