using TMPro;
using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// This script calculate the current fps and show it to a text ui.
/// </summary>
public class UiDisplayFps : MonoBehaviour
{
    public string formattedString = "{value} FPS";
    public TextMeshProUGUI txtFps;
    //public TextMeshProUGUI txtAlert;
    public Image FPSc;
    float _updateRatePerSeconds = 4.0F;
    int _frameCount = 0;
    float _dt = 0.0F;
    float _maxFPS = float.NegativeInfinity;
    [SerializeField] float _currentFPS = 0.0F;
    float _minFPS = float.PositiveInfinity;

    GameObject _testing;  // testing??
    TextMeshProUGUI _fpsStrengthText;
    TextMeshProUGUI _memoryText;
    TextMeshProUGUI _strengthText;
    Image _bar;

    private void Start()
    {
        //Application.runInBackground = true;

        _testing = GameObject.Find("Testing");

        GetFPSSTextRef();

        GetTStrengthTextRef();

        GetBarRef();

        GetMemoryTextRef();
    }
    private void GetMemoryTextRef()
    {
        GameObject memoryGameObject = GameObject.Find("Memory");
        if (memoryGameObject)
        {
            _memoryText = memoryGameObject.GetComponent<TextMeshProUGUI>();
        }
    }
    private void GetBarRef()
    {
        GameObject BAR = GameObject.Find("BAR");
        if (BAR)
        {
            _bar = BAR.GetComponent<Image>();
        }
    }
    private void GetTStrengthTextRef()
    {
        GameObject T_StrengthGameObject = GameObject.Find("T_STRENGHT");
        if (T_StrengthGameObject)
        {
            _strengthText = T_StrengthGameObject.GetComponent<TextMeshProUGUI>();
        }
    }
    private void GetFPSSTextRef()
    {
        GameObject fpssGameObject = GameObject.Find("FPSS");
        if (fpssGameObject)
        {
            _fpsStrengthText = fpssGameObject.GetComponent<TextMeshProUGUI>();
        }
    }
    void Update()
    {
        UpdateFPS();
        UpdateMemoryUsage();
    }
    private void UpdateUIElements()
    {
        txtFps.text = ConvertFPSToString();
        FPSc.color = _currentFPS >= 45 ? Color.green : _currentFPS >= 25 ? Color.yellow : Color.red;

        if (_testing)
        {
            _G.FPS = _currentFPS;
            _fpsStrengthText.text = ConvertFPSToString();

            _bar.color = _currentFPS >= 50 ? Color.green : _currentFPS >= 40 ? Color.yellow : Color.red;
            _strengthText.text = _currentFPS >= 50 ? TRANS.This("T_GOOD") : _currentFPS >= 40 ? TRANS.This("T_MEDIUM") : TRANS.This("T_WEAK");

            float S = _currentFPS / 60;
            if (S > 1) S = 1;

            float X = -180 + (360 * S) / 2;

            _bar.transform.localScale = new Vector3(S, 1, 1);
            _bar.transform.localPosition = new Vector3(X, 0, 1);
        }
    }
    private void UpdateFPS()
    {
        _frameCount++;

        _dt += Time.deltaTime; 
        //_dt += Time.unscaledDeltaTime;

        if (_dt > 1.0 / _updateRatePerSeconds)
        {
            _currentFPS = _frameCount / _dt;
            //_maxFPS = Mathf.Max(_maxFPS, _currentFPS);
            //_minFPS = Mathf.Min(_minFPS, _currentFPS);
            _frameCount = 0;
            _dt -= 1.0F / _updateRatePerSeconds;
        }

        UpdateUIElements();
    }
    private string ConvertFPSToString()
    {
        return formattedString.Replace("{value}", System.Math.Round(_currentFPS, 1).ToString("0.0"));
    }
    private void UpdateMemoryUsage()
    {
        if (!_memoryText) { GetMemoryTextRef(); }

        if (_memoryText)
        {
            _memoryText.text = "M:" + UnityEngine.Profiling.Profiler.GetMonoUsedSizeLong() / 102400;
        }
    }
}