/*
 * Copyright 2019 Kai Uwe Broulik <kde@privat.broulik.de>
 *
 * This 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) version 3, or any
 * later version accepted by the membership of KDE e.V. (or its
 * successor approved by the membership of KDE e.V.), which shall
 * act as a proxy defined in Section 6 of version 3 of the license.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include "utils_p.h"

#include <QAbstractItemModel>
#include <QAbstractProxyModel>
#include <QDBusConnection>
#include <QDBusConnectionInterface>

#include <KConcatenateRowsProxyModel>

#include <QDebug>

#include <processcore/processes.h>
#include <processcore/process.h>

using namespace NotificationManager;

QString Utils::processNameFromDBusService(const QDBusConnection &connection, const QString &serviceName)
{
    QDBusReply<uint> pidReply = connection.interface()->servicePid(serviceName);
    if (!pidReply.isValid()) {
        return QString();
    }

    const auto pid = pidReply.value();

    KSysGuard::Processes procs;
    procs.updateOrAddProcess(pid);

    KSysGuard::Process *proc = procs.getProcess(pid);

    if (!proc) {
        return QString();
    }

    return proc->name();
}

QModelIndex Utils::mapToModel(const QModelIndex &idx, const QAbstractItemModel *sourceModel)
{
    // KModelIndexProxyMapper can only map diferent indices to a single source
    // but we have the other way round, a single index that splits into different source models
    QModelIndex resolvedIdx = idx;
    while (resolvedIdx.isValid() && resolvedIdx.model() != sourceModel) {
        if (auto *proxyModel = qobject_cast<const QAbstractProxyModel *>(resolvedIdx.model())) {
            resolvedIdx = proxyModel->mapToSource(resolvedIdx);
        // KConcatenateRowsProxyModel isn't a "real" proxy model, so we need to special case for it :(
        } else if (auto *concatenateModel = qobject_cast<const KConcatenateRowsProxyModel *>(resolvedIdx.model())) {
            resolvedIdx = concatenateModel->mapToSource(resolvedIdx);
        } else {
            if (resolvedIdx.model() != sourceModel) {
                resolvedIdx = QModelIndex(); // give up
            }
        }
    }
    return resolvedIdx;
}