/******************************************************************************
 * Copyright (C) 2017 Kitsune Ral <kitsune-ral@users.sf.net>
 *
 * 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) 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
 */

#pragma once

#include <QtCore/QElapsedTimer>
#include <QtCore/QLoggingCategory>

Q_DECLARE_LOGGING_CATEGORY(MAIN)
Q_DECLARE_LOGGING_CATEGORY(PROFILER)
Q_DECLARE_LOGGING_CATEGORY(EVENTS)
Q_DECLARE_LOGGING_CATEGORY(EPHEMERAL)
Q_DECLARE_LOGGING_CATEGORY(JOBS)
Q_DECLARE_LOGGING_CATEGORY(SYNCJOB)

namespace QMatrixClient {
    // QDebug manipulators

    using QDebugManip = QDebug (*)(QDebug);

    /**
     * @brief QDebug manipulator to setup the stream for JSON output
     *
     * Originally made to encapsulate the change in QDebug behavior in Qt 5.4
     * and the respective addition of QDebug::noquote().
     * Together with the operator<<() helper, the proposed usage is
     * (similar to std:: I/O manipulators):
     *
     * @example qCDebug() << formatJson << json_object; // (QJsonObject, etc.)
     */
    inline QDebug formatJson(QDebug debug_object)
    {
#if QT_VERSION < QT_VERSION_CHECK(5, 4, 0)
        return debug_object;
#else
        return debug_object.noquote();
#endif
    }

    /**
     * @brief A helper operator to facilitate usage of formatJson (and possibly
     * other manipulators)
     *
     * @param debug_object to output the json to
     * @param qdm a QDebug manipulator
     * @return a copy of debug_object that has its mode altered by qdm
     */
    inline QDebug operator<<(QDebug debug_object, QDebugManip qdm)
    {
        return qdm(debug_object);
    }

    inline qint64 profilerMinNsecs()
    {
        return
#ifdef PROFILER_LOG_USECS
                PROFILER_LOG_USECS
#else
                200
#endif
                * 1000;
    }
}

inline QDebug operator<<(QDebug debug_object, const QElapsedTimer& et)
{
    auto val = et.nsecsElapsed() / 1000;
    if (val < 1000)
        debug_object << val << "µs";
    else
        debug_object << val / 1000 << "ms";
    return debug_object;
}