/*
* @Author: 白哉
* @Description: 
* @Date: 2025年07月01日 星期二 11:07:48
* @Modify: 
*/


using System.Collections.Generic;
using UnityEngine;


namespace Logic.Timeline
{
    public class TimelineManager
    {
        public static TimelineManager Instance = new TimelineManager();
        private TimelineManager() { }

        public List<FragmentBase> Fragment => _fragments;
        private List<FragmentBase> _fragments =new List<FragmentBase>();

        
        public void AddFragment(FragmentBase fragment)
        {
            _fragments.Add(fragment);
            Update();
        }

        public void Update()
        {
            foreach (var fragment in _fragments)
            {
                if (fragment.State == FragmentState.Prepare)
                {
                    fragment.OnStart();
                    fragment.StartTime = Time.time;
                    fragment.State = FragmentState.Playing;
                }

                if (fragment.State == FragmentState.Playing)
                {
                    fragment.OnUpdate(Time.time - fragment.StartTime);
                    if (Time.time >= fragment.StartTime + fragment.Duration)
                    {
                        fragment.OnFinished();
                        fragment.State = FragmentState.Finished;
                    }
                }
            }

            for (int i = _fragments.Count - 1; i >= 0; i--)
            {
                if (_fragments[i].State != FragmentState.Finished) continue;
                _fragments.RemoveAt(i);
            }
        }
    }
}