using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;
/********************************************************************************
*Create By CG
*Function 图片序列帧动画
*********************************************************************************/
namespace ZXK.UTility
{
    public class SpriteImgAnm : MonoBehaviour
    {
        [Header("自动播放")]
        public bool PlayAwake;
        [Header("循环播放")]
        public bool Loop = false;
        [Tooltip("序列帧的图片")]
        [SerializeField]
        private Sprite[] m_frames;
        [Header("播放速度")]
        public float Speed = 0.05f;
        [Header("插入事件位置")]
        public int ActionFrame = -1;
        [SerializeField]
        private UnityEvent m_frameEvent;

        private SpriteRenderer _container;
        private Image _containerImg;
        private int _ticked;
        private float _time;
        private bool _doAnim;

        public bool DoAnim { get { return _doAnim; } set { _doAnim = value; } }

        private void Awake()
        {
            _container = GetComponent<SpriteRenderer>();
            if (_container == null)
            {
                _containerImg = GetComponent<Image>();
            }
            Init();
        }

        private void Init()
        {
            _ticked = 0;
            _time = 0;
            _doAnim = PlayAwake;
            SetContainerSprite(m_frames[0]);
        }
        private void SetContainerSprite(Sprite sprite)
        {
            if (_container != null)
                _container.sprite = sprite;
            else
                _containerImg.sprite = sprite;
        }

        public void Play()
        {
            _ticked = 0;
            _time = 0;
            _doAnim = true;
            SetContainerSprite(m_frames[0]);
        }

        public void Pause()
        {
            _doAnim = false;
        }

        public void Resume()
        {
            _doAnim = true;
        }

        public void Stop()
        {
            _ticked = 0;
            _time = 0;
            _doAnim = false;
            SetContainerSprite(m_frames[0]);
        }

        void Update()
        {
            if (_doAnim)
            {
                _time += Time.deltaTime;
                if (_time > Speed)
                {
                    _ticked++;
                    if (_ticked == m_frames.Length)
                    {
                        if (Loop)
                        {
                            _ticked = 0;
                        }
                        else
                        {
                            _ticked = m_frames.Length - 1;
                        }
                    }
                    _time = 0;

                    if (_ticked == ActionFrame)
                        m_frameEvent.Invoke();

                    SetContainerSprite(m_frames[_ticked]);
                }
            }
        }
    }
}