/***************************************************************************
 *   Copyright (c) 2011 Jürgen Riegel <juergen.riegel@web.de>              *
 *   Copyright (c) 2024 Ladislav Michl <ladis@linux-mips.org>              *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#ifndef BASE_TIMEINFO_H
#define BASE_TIMEINFO_H

#include <chrono>
#include <sstream>
#include <string>
#include <FCGlobal.h>

namespace Base
{

using Clock = std::chrono::system_clock;

class TimeInfo: public std::chrono::time_point<Clock>
{
private:
    bool _null;

public:
    TimeInfo()
    {
        setCurrent();
    }

    TimeInfo(const TimeInfo&) = default;
    TimeInfo(TimeInfo&&) = default;
    ~TimeInfo() = default;

    void setCurrent()
    {
        static_cast<std::chrono::time_point<Clock>&>(*this) = Clock::now();
        _null = false;
    }

    void setTime_t(std::time_t time)
    {
        static_cast<std::chrono::time_point<Clock>&>(*this) = Clock::from_time_t(time);
        _null = false;
    }

    std::time_t getTime_t()
    {
        return Clock::to_time_t(*this);
    }

    static float diffTimeF(const TimeInfo& start, const TimeInfo& end = TimeInfo())
    {
        const std::chrono::duration<float> duration = end - start;
        return duration.count();
    }

    static std::string diffTime(const TimeInfo& start, const TimeInfo& end = TimeInfo())
    {
        std::stringstream ss;
        const std::chrono::duration<float> secs = end - start;
        ss << secs.count();
        return ss.str();
    }

    bool isNull() const
    {
        return _null;
    }

    static TimeInfo null()
    {
        TimeInfo ti;
        ti._null = true;
        return ti;
    }
};  // class TimeInfo

using Ticks = std::chrono::steady_clock;

class TimeElapsed: public std::chrono::time_point<Ticks>
{
public:
    TimeElapsed()
    {
        setCurrent();
    }

    TimeElapsed(const TimeElapsed&) = default;
    TimeElapsed(TimeElapsed&&) = default;
    ~TimeElapsed() = default;

    void setCurrent()
    {
        static_cast<std::chrono::time_point<Ticks>&>(*this) = Ticks::now();
    }

    static float diffTimeF(const TimeElapsed& start, const TimeElapsed& end = TimeElapsed())
    {
        const std::chrono::duration<float> duration = end - start;
        return duration.count();
    }

    static std::string diffTime(const TimeElapsed& start, const TimeElapsed& end = TimeElapsed())
    {
        std::stringstream ss;
        const std::chrono::duration<float> secs = end - start;
        ss << secs.count();
        return ss.str();
    }
};  // class TimeElapsed

}  // namespace Base

#endif  // BASE_TIMEINFO_H