//------------------------------------------------------------------------------
/*
    This file is part of clio: https://github.com/XRPLF/clio
    Copyright (c) 2022, the clio developers.

    Permission to use, copy, modify, and distribute this software for any
    purpose with or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

#pragma once

#include <chrono>
#include <type_traits>
#include <utility>

namespace util {

/**
 * @brief Profiler function to measure the time a function execution consumes.
 *
 * @tparam U The duration measurement to use; defaults to milliseconds
 * @tparam FnType The type of the function object
 * @param func Any function object
 * @return If the function object has a return value, the result of the function call and the elapsed time(ms) is
 * returned as a pair
 * @return Only return the elapsed time if passed function object does not have a return value
 */
template <typename U = std::chrono::milliseconds, typename FnType>
[[nodiscard]] auto
timed(FnType&& func)
{
    auto start = std::chrono::system_clock::now();

    if constexpr (std::is_same_v<decltype(func()), void>) {
        func();
        return std::chrono::duration_cast<U>(std::chrono::system_clock::now() - start).count();
    } else {
        auto ret = func();
        auto elapsed = std::chrono::duration_cast<U>(std::chrono::system_clock::now() - start).count();
        return std::make_pair(std::move(ret), std::move(elapsed));
    }
}

}  // namespace util