Time.h

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#pragma once
#include "Core.h"
#include <SDL3/SDL_stdinc.h>
 
namespace Shit {
    class Game;

    class SHIT_API Time {
        friend class Game;
    public:
        Time(const Time&) = delete;
        Time& operator=(const Time&) = delete;
        Time(Time&&) = delete;
        Time& operator=(Time&&) = delete;
 
        // --- 静态API ---
        static Time& GetInstance();
        static void Init() { GetInstance().init(); }                    
        static void Update() { GetInstance().update(); }                
        static float GetDeltaTime() { return GetInstance().m_deltaTime; }   
        static double GetTotalTime() { return GetInstance().m_totalTime; }  
        static unsigned int GetTargetFPS() { return GetInstance().m_targetFPS; }  
        static void SetTargetFPS(unsigned int fps) { GetInstance().m_targetFPS = fps; }  
 
    private:
        Time();
        ~Time();
 
        void init();
        void update();
 
        float m_deltaTime = 0.0f;
        double m_totalTime = 0.0f;
        Uint64 m_lastTime;
        Uint64 m_currentTime;
        unsigned int m_targetFPS = 144;
    };
}