using System.Collections;
using UnityEngine;

namespace Game.Component
{
    public class ObjectShake : MonoBehaviour
    {
        [SerializeField] private ObjectShake LinkObjectShake;
        private bool  startShake = false; //camera是否开始震动
        private float seconds    = 0f;    //震动持续秒数
        private bool  started    = false; //是否已经开始震动
        private float quake      = 0.2f;  //震动系数

        [SerializeField] private float quakeOffset = 1;

        private Vector3 startPOS; //camera的起始位置

        // Use this for initialization
        void OnEnable()
        {
            this.startPOS = transform.localPosition;
        }

        // Update is called once per frame
        void LateUpdate()
        {
            if (startShake)
            {
                transform.localPosition = this.startPOS + Random.insideUnitSphere * (this.quake * this.quakeOffset);
            }

            if (started)
            {
                StartCoroutine(WaitForSecond(seconds));
                started = false;
            }
        }
        /// <summary>
        /// 外部调用控制camera震动
        /// </summary>
        /// <param name="duration">震动时间</param>
        /// <param name="scale">震动幅度</param>
        public void ShakeFor(float duration, float scale)
        {
            // if (startShake)
            // return;
            seconds    = duration;
            started    = true;
            startShake = true;
            quake      = scale;
            if (!ReferenceEquals (this.LinkObjectShake , null))
            {
                this.LinkObjectShake.ShakeFor (duration , scale);
            }
        }
        IEnumerator WaitForSecond(float a)
        {
            // camPOS = transform.position;

            yield return new WaitForSeconds(a);
            startShake              = false;
            transform.localPosition = this.startPOS;
        }
    }
}