/* BEGIN_COMMON_COPYRIGHT_HEADER
 * (c)LGPL2+
 *
 * LXQt - a lightweight, Qt based, desktop toolset
 * https://lxqt.org/
 *
 * Copyright (C) 2012  Alec Moskvin <alecm@gmx.com>
 *
 * This program or library is free software; you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA
 *
 * END_COMMON_COPYRIGHT_HEADER */

#include <QtDBus/QDBusConnection>
#include <QtDBus/QDBusReply>
#include <QDebug>
#include <LXQt/Globals>
#include <XdgIcon>
#include "modulemodel.h"
#include "autostartutils.h"

ModuleModel::ModuleModel(QObject* parent)
    : QAbstractListModel(parent)
{
    mInterface = new QDBusInterface(QSL("org.lxqt.session"), QSL("/LXQtSession"), QString(),
                                    QDBusConnection::sessionBus(), this);
    connect(mInterface, SIGNAL(moduleStateChanged(QString,bool)), SLOT(updateModuleState(QString,bool)));
}

ModuleModel::~ModuleModel()
{
    delete mInterface;
}

void ModuleModel::reset()
{
    mKeyList.clear();
    mStateMap.clear();
    mItemMap = AutostartItem::createItemMap();

    QMap<QString,AutostartItem>::iterator iter;
    for (iter = mItemMap.begin(); iter != mItemMap.end(); ++iter)
    {
        if (AutostartUtils::isLXQtModule(iter.value().file()))
            mKeyList.append(iter.key());
    }

    QDBusReply<QVariant> reply = mInterface->call(QSL("listModules"));
    const QStringList moduleList = reply.value().toStringList();
    for (const QString& moduleName : moduleList)
    {
        if (mItemMap.contains(moduleName))
            mStateMap[moduleName] = true;
    }
}

QVariant ModuleModel::data(const QModelIndex& index, int role) const
{
    QString name = mKeyList.at(index.row());
    if (index.column() == 0)
    {
        switch (role)
        {
            case Qt::DisplayRole:
                return mItemMap.value(name).file().name();
            case Qt::CheckStateRole:
                return mItemMap.value(name).isEnabled() ? Qt::Checked : Qt::Unchecked;
            case Qt::ToolTipRole:
                return mItemMap.value(name).file().comment();
        }
    }
    else if (index.column() == 1 && (role == Qt::DisplayRole || role == Qt::DecorationRole))
    {
        if (role == Qt::DisplayRole && mStateMap[name] == true)
            return QString(tr("Running") + QLatin1Char(' '));
    }
    return QVariant();
}

bool ModuleModel::setData(const QModelIndex& index, const QVariant& value, int role)
{
    if (role == Qt::CheckStateRole)
    {
        QString key = mKeyList.at(index.row());
        mItemMap[key].setEnabled(value == Qt::Checked);
        emit dataChanged(index, index);
        return true;
    }
    return false;
}

Qt::ItemFlags ModuleModel::flags(const QModelIndex& index) const
{
    Q_UNUSED(index);
    return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable;
}

QMap<QString, AutostartItem> ModuleModel::items()
{
    QMap<QString, AutostartItem> allItems;

    for(const QString &s : qAsConst(mKeyList))
        allItems[s] = mItemMap.value(s);

    return allItems;
}

int ModuleModel::rowCount(const QModelIndex& parent) const
{
    Q_UNUSED(parent);
    return mKeyList.size();
}

void ModuleModel::writeChanges()
{
    for (const QString& key :  qAsConst(mKeyList))
        mItemMap[key].commit();
}

void ModuleModel::updateModuleState(const QString& moduleName, bool state)
{
    if (mItemMap.contains(moduleName))
    {
        mStateMap[moduleName] = state;
        QModelIndex i = index(mKeyList.indexOf(moduleName), 1);
        emit dataChanged(i, i);
    }
}

void ModuleModel::toggleModule(const QModelIndex &index, bool status)
{
    if (!index.isValid())
        return;

    QList<QVariant> arg;
    arg.append(mKeyList.at(index.row()));
    mInterface->callWithArgumentList(QDBus::NoBlock,
                                     status ? QSL("startModule") : QSL("stopModule"),
                                     arg);
}
