using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace Beyond
{
    public class FPSCounter : MonoBehaviour
    {
        private float m_FPSDisplay;
        private float m_averageFPSDisplay;
        private float m_minFPSDisplay;
        private float m_maxFPSDisplay;

        private float m_fps;
        private float m_minFPS = Mathf.Infinity;
        private float m_maxFPS = 0f;
        private int m_framesPassed = 0;
        private float m_fpsTotal = 0f;
        private int startDelay = 20;

        [SerializeField] private int m_y = 40;
        [SerializeField] private int m_Padding = -30;
        [SerializeField, Range(0f, 1f)] private float screenOffset = 0.85f;
        private int m_x = 5;
        private int m_width = 300;
        private int m_height = 25;

        // Update is called once per frame
        void Update()
        {
            m_x = (int)(Screen.width * screenOffset);

            m_fps = 1 / Time.unscaledDeltaTime;

            m_FPSDisplay = (int)m_fps;

            m_fpsTotal += m_fps;
            m_framesPassed++;
            m_averageFPSDisplay = (int)(m_fpsTotal / m_framesPassed);

            if (m_fps > m_maxFPS && m_framesPassed > startDelay)
            {
                m_maxFPS = m_fps;
                m_maxFPSDisplay = (int)m_maxFPS;
            }

            if (m_fps < m_minFPS && m_framesPassed > startDelay)
            {
                m_minFPS = m_fps;
                m_minFPSDisplay = (int)m_minFPS;
            }
        }

        void OnGUI()
        {
            GUIStyle style = new GUIStyle();
            style.fontSize = 30;
            style.normal.textColor = Color.white;

            GUI.Label(new Rect(m_x, m_y + m_Padding, m_width, m_height), "FPS    : " + m_FPSDisplay, style);
            GUI.Label(new Rect(m_x, m_y + m_y + m_Padding, m_width, m_height), "avg FPS: " + m_averageFPSDisplay, style);
            GUI.Label(new Rect(m_x, m_y + m_y + m_y + m_Padding, m_width, m_height), "min FPS: " + m_minFPSDisplay, style);
            GUI.Label(new Rect(m_x, m_y + m_y + m_y + m_y + m_Padding, m_width, m_height), "max FPS: " + m_maxFPSDisplay, style);
        }
    }
}