using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;
using UnityEngine.UI;
using UnityEngine.Events;
using UnityEngine.EventSystems;

namespace YLBattle
{
    /// <summary>
    /// 显示 fps
    /// </summary>
    public class ShowFPS : MonoBehaviour
    {
        /// <summary>
        /// 更新间隔时间，单位：秒
        /// </summary>
        private float mInterval = 0.5f;

        /// <summary>
        /// 上一次计算 fps 的时间
        /// </summary>
        private float mLastTime = 0.0f;

        /// <summary>
        /// 帧数计数器
        /// </summary>
        private int mFrameNum = 0;

        /// <summary>
        /// 当前 fps
        /// </summary>
        private float mCurFPS = 0.0f;
        /// <summary>
        /// 当前ping/pong循环时间
        /// </summary>
        private int curTTs = 0;
        /// <summary>
        /// gui style
        /// </summary>
        private GUIStyle myStyle = new GUIStyle();

        private GUIStyle ttsStyle = new GUIStyle();
        /// <summary>
        /// 初始化
        /// </summary>
        private void Start()
        {
            mLastTime = Time.realtimeSinceStartup;
            mFrameNum = 0;

            myStyle.fontSize = 40;
            myStyle.normal.textColor = Color.yellow;

            ttsStyle.fontSize = 24;
            ttsStyle.normal.textColor = Color.green;
        }

        /// <summary>
        /// 更新
        /// </summary>
        private void Update()
        {

            mFrameNum++;

            float curTime = Time.realtimeSinceStartup;

            if ((mLastTime + mInterval) < curTime)
            {
                mCurFPS = (float)mFrameNum / (curTime - mLastTime);

                mFrameNum = 0;
                mLastTime = curTime;
            }

            curTTs = MapTcpProxy.Instance?.Peer.tts ?? -1;

            ttsStyle.normal.textColor = curTTs switch
            {
                > 100 => Color.red,
                > 50 => Color.yellow,
                _ => Color.green
            }; 

        }

        /// <summary>
        /// 显示 fps
        /// </summary>
        private void OnGUI()
        {
            GUI.Label(new Rect(0, 0, 50, 50), string.Format("FPS: {0:f2}", mCurFPS), myStyle);
            GUI.Label(new Rect(800, 0, 50, 50), $" rtts:{curTTs}ms", ttsStyle);
        }
    }

}