class Timer

#pragma once
#include <iostream>
#include <ctime>
#include <chrono>
#include <cmath>

class Timer {
private:
    std::chrono::time_point<std::chrono::system_clock> m_StartTime;
    std::chrono::time_point<std::chrono::system_clock> m_EndTime;
    bool m_bRunning = false;

public:
    void start() {
        this->m_StartTime = std::chrono::system_clock::now();
        this->m_bRunning = true;
    }

    void end() {
        this->m_EndTime = std::chrono::system_clock::now();
        this->m_bRunning = false;
    }

    double elapsedMilliseconds() {
        std::chrono::time_point<std::chrono::system_clock> endTime;

        if (this->m_bRunning) {
            endTime = std::chrono::system_clock::now();
        }
        else {
            endTime = this->m_EndTime;
        }

        return std::chrono::duration_cast<std::chrono::milliseconds>(endTime - m_StartTime).count();
    }

    double elapsedSeconds() {
        return this->elapsedMilliseconds() / 1000.0;
    }
};