#include "frametiming.h"
#include <SDL3/SDL.h>

void Osu_UpdateFrameTiming(struct Osu_FrameTiming* frameTiming) {
    Uint64 currentTime = SDL_GetTicksNS();
    Uint64 lastFrameDuration = currentTime - frameTiming->lastFrameTime;
    frameTiming->lastFrameTime = currentTime;
    frameTiming->accumulator += lastFrameDuration;

    frameTiming->sum = frameTiming->sum - frameTiming->frameTimes[frameTiming->frameIndex] + lastFrameDuration;
    frameTiming->frameTimes[frameTiming->frameIndex] = lastFrameDuration;
    frameTiming->avgFrameDuration = (double)frameTiming->sum / OSU_FRAME_TIME_SAMPLES;
    frameTiming->frameIndex = (frameTiming->frameIndex + 1) % OSU_FRAME_TIME_SAMPLES;
}