using System;
using UnityEngine;

namespace SUISS.Core
{
	public class FPSCounter : MonoBehaviour
	{
		public static void Create()
		{
		}

		protected virtual void Start()
		{
			this._style = new GUIStyle(GUIStyle.none);
			this._style.fontSize = 20;
			this._style.normal.textColor = Color.white;
			base.InvokeRepeating("CalculateFramerate", 0f, 0.05f);
		}

		protected virtual void OnGUI()
		{
			GUI.backgroundColor = Color.blue;
			GUI.BeginGroup(Rect.MinMaxRect(10f, 10f, 100f, 40f));
			GUI.Box(Rect.MinMaxRect(0f, 0f, 90f, 30f), string.Empty);
			GUI.Label(Rect.MinMaxRect(10f, 0f, 80f, 20f), string.Format("{0:0.000}", this._fps), this._style);
			GUI.EndGroup();
		}

		protected virtual void Update()
		{
			this._deltaTime += Time.unscaledDeltaTime;
			this._frameCount++;
		}

		private void CalculateFramerate()
		{
			if (this._frameCount == 0 || this._deltaTime == 0f)
			{
				return;
			}
			this._fps = (float)this._frameCount / this._deltaTime;
			this._frameCount = 0;
			this._deltaTime = 0f;
		}

		private static FPSCounter _instance;

		protected float _deltaTime;

		protected int _frameCount;

		protected float _fps;

		protected GUIStyle _style;
	}
}