using UnityEngine;

namespace SinmaiAssist.Common;

public class ShowFPS
{
    private static string fpsText = "FPS: ";
    private static float deltaTime = 0.0f;

    public static void OnGUI()
    {
        Update();
        GUIStyle style = new GUIStyle();
        style.fontSize = 24;
        style.normal.textColor = Color.black;
        style.alignment = TextAnchor.UpperLeft;
        UnityEngine.GUI.Label(new Rect(10 + 2, 10 + 2, 500, 30), fpsText, style);
        style.normal.textColor = Color.white;
        UnityEngine.GUI.Label(new Rect(10, 10, 500, 30), fpsText, style);
    }

    private static void Update()
    {
        deltaTime += (Time.deltaTime - deltaTime) * 0.1f;
        float fps = 1.0f / deltaTime;
        fpsText = $"FPS: {Mathf.Ceil(fps)}";
    }
}