st-timer.h

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#pragma once
 
namespace StyyxUtil
{
    struct TimerUtil {
 

        void Start()
        {
            if (!running) {
                startTime = std::chrono::steady_clock::now();
                running = true;
            }
        }

        void Stop()
        {
            running = false;
        }

        void Reset()
        {
            startTime = std::chrono::steady_clock::now();
        }

        [[nodiscard]] double ElapsedSeconds() const
        {
            if (!running) {
                return 0.0;
            }
            const auto now = std::chrono::steady_clock::now();
            return std::chrono::duration<double>(now - startTime).count();
        }

        [[nodiscard]] bool IsRunning() const {
            return running;
        }

        void StartLimited(double a_seconds) {
            limitSeconds = a_seconds;
            limited = true;
            startTime = std::chrono::steady_clock::now();
            running = true;
        }

        bool IsExpired()
        {
            if (!running || !limited) {
                return false;
            }
 
            if (ElapsedSeconds() >= limitSeconds) {
                Stop();
                return true;
            }
            return false;
        }

        [[nodiscard]] double RemainingSeconds() const
        {
            if (!running || !limited) {
                return 0.0;
            }
 
            return std::max(0.0, limitSeconds - ElapsedSeconds());
        }
 
    private:
        bool limited{ false };
        double limitSeconds{0.0};
        std::chrono::steady_clock::time_point startTime{};
        bool running{false};
    };
}