using System;
using System.Collections;
using System.Collections.Generic;
using Dreamteck.Splines;
using Ichni.RhythmGame.Beatmap;
using Lean.Pool;
using UniRx;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public partial class CrossTrackPoint : GameElement, IHaveTimeDurationSubmodule
    {
        #region [暴露属性字段] Essential Configs
        public ElementFolder trackListFolder;
        public FlexibleInt trackSwitch;
        public FlexibleFloat trackPercent;
        #endregion

        #region [计算与状态缓存] Calculated & Cached States
        public Track nowAttachedTrack;
        private int nowAttachedTrackIndex;
        public SplinePositioner trackPositioner;
        #endregion

        #region [子模块接口] Submodules
        public TimeDurationSubmodule timeDurationSubmodule { get; set; }
        #endregion

        #region [生命周期] Lifecycle & Factory
        public static CrossTrackPoint GenerateElement(string elementName, Guid id, List<string> tags,
            bool isFirstGenerated, ElementFolder elementFolder, FlexibleInt trackSwitch, FlexibleFloat trackPercent)
        {
            CrossTrackPoint point = 
                LeanPool.Spawn(GameManager.Instance.basePrefabs.crossTrackPoint, elementFolder.transform).GetComponent<CrossTrackPoint>();
            point.Initialize(elementName, id, tags, isFirstGenerated, elementFolder);
            point.trackPositioner = point.gameObject.GetComponent<SplinePositioner>();
            point.nowAttachedTrackIndex = -1;
            point.trackListFolder = elementFolder;
            point.trackSwitch = trackSwitch;
            point.trackPercent = trackPercent;
            point.trackPositioner.motion.applyRotation = false;
            return point;
        }

        public override void AfterInitialize()
        {
            GameManager.Instance.trackManager.RegisterCrossPoint(this);
            base.AfterInitialize();
        }

        public override void SetDefaultSubmodules()
        {
            timeDurationSubmodule = new TimeDurationSubmodule(this);
        }
        #endregion

        #region [轮询更新] Main Update
        public void ManualUpdate(float currentSongTime)
        {
            if (trackPercent.animations.Count > 0)
            {
                trackSwitch.UpdateFlexibleInt(currentSongTime);
                trackPercent.UpdateFlexibleFloat(currentSongTime);
                SetPoint();
                
                if(nowAttachedTrackIndex >= trackSwitch.animations.Count - 1 && 
                   trackPercent.returnType == FlexibleReturnType.After)
                {
                    trackPositioner.SetPercent(1);
                    GameManager.Instance.trackManager.UnregisterCrossPoint(this);
                }
            }
        }
        
        private void SetPoint()
        {
            if (nowAttachedTrackIndex != trackSwitch.value && 
                trackSwitch.value >= 0 &&
                trackSwitch.value < trackListFolder.trackList.Count)
            {
                nowAttachedTrack = trackListFolder.trackList[trackSwitch.value];
                nowAttachedTrackIndex = trackSwitch.value;
                trackPositioner.spline = trackListFolder.trackList[trackSwitch.value].trackPathSubmodule.path;
            }
            
            trackPositioner.SetPercent(trackPercent.value);
        }
        #endregion
    }

}