using UnityEngine;
using System.Collections;

namespace YLBattle
{
    /// <summary>
    /// 时间比例校正.
    /// </summary>
    public class TimeScale : MonoBehaviour
    {
        bool isPause;
        float curTime;
        private static TimeScale mInstance;

        /// <summary>
        /// 暂停时间周期 引用计数
        /// </summary>
        float mPauseTimeCount;

        /// <summary>
        /// 旧的时间
        /// </summary>
        float mOldTime;

        /// <summary>
        /// 获取单键
        /// </summary>
        /// <returns>单键实例</returns>
        public static TimeScale Instance()
        {
            if (mInstance == null)
            {
                GameObject obj = new GameObject("TimeScale");
                mInstance = obj.AddComponent<TimeScale>();
            }

            return mInstance;
        }

        /// <summary>
        /// 更新
        /// </summary>
        void Update()
        {
            if (isPause)
            {
                return;
            }

            //float targetFrameRate = (float)Application.targetFrameRate;
            //if (targetFrameRate > 30)
            //{
            //    Time.timeScale = 1;

            //}
            //else if (targetFrameRate <= 12)
            //{
            //    Time.timeScale = .4f;
            //}
            //else
            //{
            //Time.timeScale = targetFrameRate / 30;
            //}
        }

        /// <summary>
        /// 继续重载
        /// </summary>
        public void Pause()
        {
            mOldTime = Time.realtimeSinceStartup;
            isPause = true;
            Time.timeScale = 0;
            mPauseTimeCount += 1;
        }

        /// <summary>
        /// 继续 播放
        /// </summary>
        public void Play()
        {

            mPauseTimeCount -= 1;
            if (mPauseTimeCount <= 0)
            {
                isPause = false;
                Time.timeScale = 1;
                mPauseTimeCount = 0;
            }
        }


        /// <summary>
        /// 获取isPause
        /// </summary>
        /// <returns></returns>
        public bool GetPause()
        {
            return isPause;
        }

        /// <summary>
        /// 强制取消暂停
        /// </summary>
        /// <returns></returns>
        public void PauseOver()
        {
            isPause = false;
            Time.timeScale = 1;
            this.mPauseTimeCount = 0;
        }
    }

}