using System.Collections.Generic;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public class TrackManager : MonoBehaviour
    {
        #region [核心管家字段] Fields
        // 这里可以分类存储场上的各类轨道组件
        private List<Track> _activeTracks = new List<Track>(50);
        private List<TrackHeadPoint> _activeHeadPoints = new List<TrackHeadPoint>(50);
        private List<TrackPercentPoint> _activePercentPoints = new List<TrackPercentPoint>(50);
        private List<CrossTrackPoint> _activeCrossPoints = new List<CrossTrackPoint>(50);
        #endregion

        #region [注册与注销] Registration
        public void RegisterTrack(Track track) => _activeTracks.Add(track);
        public void UnregisterTrack(Track track) => _activeTracks.Remove(track);

        public void RegisterHeadPoint(TrackHeadPoint point) => _activeHeadPoints.Add(point);
        public void UnregisterHeadPoint(TrackHeadPoint point) => _activeHeadPoints.Remove(point);

        public void RegisterPercentPoint(TrackPercentPoint point) => _activePercentPoints.Add(point);
        public void UnregisterPercentPoint(TrackPercentPoint point) => _activePercentPoints.Remove(point);

        public void RegisterCrossPoint(CrossTrackPoint point) => _activeCrossPoints.Add(point);
        public void UnregisterCrossPoint(CrossTrackPoint point) => _activeCrossPoints.Remove(point);
        #endregion

        #region [中央集权主循环] Manager-Driven Tick
        // 注意：如果你希望将所有的 Manager 都由 GameManager.Update 统一调度，
        // 可以将此处的 Update() 和 LateUpdate() 改为公开的 ManualUpdate(float songTime)。
        public void ManualUpdate(float currentSongTime)
        {
            if (!GameManager.Instance.songPlayer.isUpdating) return;

            // 1. 更新所有主轨道的滑动区间
            for (var index = 0; index < _activeTracks.Count; index++)
            {
                var track = _activeTracks[index];
                if (track.isActiveAndEnabled) track.ManualUpdate(currentSongTime);
            }

            // 2. 更新所有的轨道头部引导点
            for (var index = 0; index < _activeHeadPoints.Count; index++)
            {
                var headPoint = _activeHeadPoints[index];
                if (headPoint.isActiveAndEnabled) headPoint.ManualUpdate(currentSongTime);
            }

            // 3. 更新基于百分比的相对点
            for (var index = 0; index < _activePercentPoints.Count; index++)
            {
                var percentPoint = _activePercentPoints[index];
                if (percentPoint.isActiveAndEnabled) percentPoint.ManualUpdate(currentSongTime);
            }

            // 4. 更新跨轨切分点
            for (var index = 0; index < _activeCrossPoints.Count; index++)
            {
                var crossPoint = _activeCrossPoints[index];
                if (crossPoint.isActiveAndEnabled) crossPoint.ManualUpdate(currentSongTime);
            }
        }

        public void ManualLateUpdate(float currentSongTime)
        {
            if (!GameManager.Instance.songPlayer.isUpdating) return;

            // 执行所有轨道的重置与缓冲清理操作
            foreach (var track in _activeTracks)
            {
                if(track.isActiveAndEnabled) track.ManualLateUpdate();
            }
        }
        #endregion
    }
}