using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace YKMoon.Tween
{
    public partial class YKTweenManager : USingletonMono<YKTweenManager>
    {
        private List<YKTween> tweens = new List<YKTween>();

        protected void StartTween(YKTween tween)
        {
            if (tween == null) {
                return;
            }
            if(!tweens.Contains(tween)) {
                tweens.Add(tween);
            }
        }
        public void StopTween(YKTween tween, bool callFinishEvent = true)
        {
            if (tween == null) {
                return;
            }
            if (callFinishEvent) {
                tween.Finish(true);
            }
            removeList.Enqueue(tween);
        }
        public void Kill(YKTween tween)
        {
            if (tween == null) {
                return;
            }
            StopTween(tween, false);
        }

        private Queue<YKTween> removeList = new Queue<YKTween>();

        private void Update()
        {
            while(removeList.Count > 0) {
                tweens.Remove(removeList.Dequeue());
            }
            List<YKTween> copyTweens = ListPool<YKTween>.Get();
            copyTweens.AddRange(tweens);
            foreach(var tween in copyTweens) {
                if (tween == null) {
                    continue;
                }
                if(!tween.IsValid()) {
                    removeList.Enqueue(tween);
                    continue;
                }
                tween.Update(Time.deltaTime, Time.unscaledDeltaTime);
                if(tween.IsFinished()) {
                    tween.Finish(true);
                    removeList.Enqueue(tween);
                    continue;
                }
            }
            ListPool<YKTween>.Release(copyTweens);
        }
    }
}