using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Dreamteck.Splines;
using Ichni.RhythmGame.Beatmap;
using UniRx;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.Serialization;

namespace Ichni.RhythmGame
{
    public partial class Hold : NoteBase
    {
        public float holdEndTime;
        public float holdingTime;
        public bool isHolding;
        public float holdingBufferTime;
        public float bufferTimer;

        public float preTimeDifference;
        public NoteJudgeType preJudgeType;
        public float postTimeDifference;
        public NoteJudgeType postJudgeType;
        
        public static Hold GenerateElement(string elementName, Guid id, List<string> tags, bool isFirstGenerated,
            GameElement parentElement, float exactJudgeTime, float holdEndTime)
        {
            Hold hold = Instantiate(GameManager.instance.basePrefabs.holdNote, parentElement.transform).GetComponent<Hold>();
            
            hold.Initialize(elementName, id, tags, isFirstGenerated, parentElement);
            hold.exactJudgeTime = exactJudgeTime;
            hold.holdEndTime = holdEndTime;
            hold.holdingTime = 0;
            hold.holdingBufferTime = 0.04f;
            hold.judgeIntervals = new NoteJudgeIntervals(
                new TimeInterval(-0.15f, -0.15f), new TimeInterval(-0.15f, -0.125f),
                new TimeInterval(-0.125f, -0.1f), new TimeInterval(-0.1f, 0.1f),
                new TimeInterval(0.1f, 0.125f), new TimeInterval(0.125f, 0.15f), 0.15f);
            hold.preJudgeType = NoteJudgeType.NotJudged;
            hold.postJudgeType = NoteJudgeType.NotJudged;
            
            if (parentElement.TryGetComponent(out Track track))
            {
                if (track.trackTimeSubmodule != null)
                {
                    hold.track = track;
                    hold.trackPositioner = hold.AddComponent<SplinePositioner>();
                    hold.trackPositioner.spline = track.trackPathSubmodule.path;
                    hold.trackPositioner.updateMethod = SplineUser.UpdateMethod.LateUpdate;
                    hold.isOnTrack = true;
                    hold.UpdateNoteInTrack();
                }
                else
                {
                    throw new Exception("如果Note要生成在Track上，Track必须有TrackTimeSubmodule组件。");
                }
            }
            else
            {
                hold.track = null;
                hold.isOnTrack = false;
            }
            
            return hold;
        }
        
        public override void ExecuteStartJudge()
        {
            float triggerTime = GameManager.instance.songTime;
            preTimeDifference = triggerTime - exactJudgeTime;
            
            NoteJudgeType startJudgeType = GetStartJudgeType(preTimeDifference);
            preJudgeType = startJudgeType;
            
            isFirstJudged = true;
            isHolding = true;
            
            noteAudioSubmodule.PlayHoldStartAudio();
            
            //Debug.Log($"Hold Note Start Judge: {startJudgeType} at {triggerTime}");
        }

        public void ExecuteProcessJudge()
        {
            isHolding = true;
        }

        public void ExecuteFinalJudge()
        {
            foreach (EffectBase effect in noteVisual.effectSubmodule.effectCollection["StartHold"])
            {
                if (effect.nowEffectState == EffectBase.EffectState.Middle)
                {
                    effect.Adjust();
                }
            }
            
            foreach (EffectBase effect in noteVisual.effectSubmodule.effectCollection["Holding"])
            {
                effect.Adjust();
            }
            
            float triggerTime = GameManager.instance.songTime;
            postTimeDifference = holdEndTime - triggerTime;
            
            if (postTimeDifference <= 0.1f)
            {
                postJudgeType = NoteJudgeType.Perfect;
            }
            else if (postTimeDifference <= 0.125f)
            {
                postJudgeType = NoteJudgeType.Good;
            }
            else 
            {
                postJudgeType = NoteJudgeType.Bad;
            }
            
            //Debug.Log($"Hold Note Final Judge: {postJudgeType} at {triggerTime} of difference {postTimeDifference}");

            NoteJudgeType finalJudge = GetLowerType(preJudgeType, postJudgeType);
            float finalTimeDifference = Mathf.Min(preTimeDifference, postTimeDifference);
            GameManager.instance.playingRecorder.resultData.Add(finalTimeDifference);
            
            if (finalJudge == NoteJudgeType.Perfect)
            {
                Perfect(triggerTime);
            }
            else if (finalJudge == NoteJudgeType.Good)
            {
                Good(triggerTime);
            }
            else if (finalJudge == NoteJudgeType.Bad)
            {
                Bad(triggerTime);
            }
            else if (finalJudge == NoteJudgeType.Miss)
            {
                Miss(triggerTime);
            }
            
            
            if (finalJudge != NoteJudgeType.Miss)
            {
                noteAudioSubmodule.PlayGeneralJudgeAudios();
            }
        }
    }

    public partial class Hold
    {
        public override void UpdateNoteInMovableTrack()
        {
            if (!isHolding && !isFinalJudged)
            {
                base.UpdateNoteInMovableTrack();
            }

            if (noteVisual is INoteVisualHold noteVisualHold)
            {
                noteVisualHold.UpdateHoldInMovableTrack();
            }
        }

        public override void UpdateNoteInStaticTrack()
        {
            base.UpdateNoteInStaticTrack();
            
            if (noteVisual is INoteVisualHold noteVisualHold)
            {
                noteVisualHold.UpdateHoldInStaticTrack();
            }
        }
        
        protected override void RemoveFromCheckingList()
        {
            if (GameManager.instance.noteJudgeManager.checkingHoldList.Contains(this))
            {
                GameManager.instance.noteJudgeManager.checkingHoldList.Remove(this);
            }
        }

        public override void SetPerfectPosition()
        {
            if (isOnTrack && track.trackTimeSubmodule is TrackTimeSubmoduleMovable movable)
            {
                holdingTime = holdEndTime - exactJudgeTime;
                (noteVisual as INoteVisualHold)?.UpdateHoldInMovableTrack();
            }
        }

        protected override void SlowOffsetAfterExactJudgeTime()
        {
            if (isOnTrack && track.trackTimeSubmodule is TrackTimeSubmoduleMovable movable)
            {
                holdingTime = GameManager.instance.songTime - exactJudgeTime;
                (noteVisual as INoteVisualHold)?.UpdateHoldInMovableTrack();
            }
        }
    }
    
    public partial class Hold
    {
        public override void SetDefaultSubmodules()
        {
            base.SetDefaultSubmodules();
            noteAudioSubmodule = new NoteAudioSubmodule(this, "DefaultTap");
        }

        public override void SaveBM()
        {
            matchedBM = new Hold_BM(elementName, elementGuid, tags, parentElement.matchedBM as GameElement_BM, exactJudgeTime, holdEndTime);
        }
    }
    
    public partial class Hold
    {
        public bool CheckJudgeAvailability(InputUnitTap inputUnitTap)
        {
            return !isFirstJudged && noteJudgeSubmodule.judgeUnitList.All(judgeUnit => judgeUnit.CheckJudgeAvailability(inputUnitTap));
        }
        
        public bool CheckJudgeAvailability(InputUnitTouch inputUnitTouch)
        {
            return isFirstJudged && noteJudgeSubmodule.judgeUnitList.All(judgeUnit => judgeUnit.CheckJudgeAvailability(inputUnitTouch));
        }
        
        protected override void SetJudgeArea()
        {
            if (!SettingsManager.instance.gameSettings.debugMode)
            {
                return;
            }
            
            if (noteJudgeSubmodule != null)
            {
                if (isDuringJudging && !isFirstJudged)
                {
                    foreach (NoteJudgeUnit unit in noteJudgeSubmodule.judgeUnitList.Where(unit => !unit.isShowingJudge))
                    {
                        unit.SetShowingJudge(true);
                    }
                }

                foreach (NoteJudgeUnit unit in noteJudgeSubmodule.judgeUnitList.Where(unit => unit.isShowingJudge))
                {
                    unit.UpdateJudge();
                }

                if (!isDuringJudging && GameManager.instance.songTime > holdEndTime - 2 * Time.deltaTime)
                {
                    foreach (NoteJudgeUnit unit in noteJudgeSubmodule.judgeUnitList.Where(unit => unit.isShowingJudge))
                    {
                        unit.SetShowingJudge(false);
                    }
                }
            }
        }
    }

    public partial class Hold
    {
        protected override void Update()
        {
            float songTime = GameManager.instance.songTime;
            
            if (!isFirstJudged && !isDuringJudging &&
                songTime >= exactJudgeTime + judgeIntervals.beforeMiss.intervalStart &&
                !GameManager.instance.noteJudgeManager.checkingHoldList.Contains(this))
            {
                isDuringJudging = true;
                GameManager.instance.noteJudgeManager.checkingHoldList.Add(this);
            }
            
            if (!GameManager.instance.audioManager.isUpdating || isFinalJudged)
            {
                return;
            }
            
            if (isHolding)
            {
                holdingTime = songTime - exactJudgeTime;
                bufferTimer = holdingBufferTime;
            }
            else if(isFirstJudged)
            {
                bufferTimer -= Time.deltaTime;
            }
            
            if (isOnTrack)
            {
                UpdateNoteInTrack();
            }
            
            if (isDuringJudging)
            {
                noteScreenPosition = GetScreenPosition();
            }
            
            SetJudgeArea();
            
            if (!isFirstJudged && exactJudgeTime < GameManager.instance.songTime)
            {
                SlowOffsetAfterExactJudgeTime();
            }
            
            foreach (EffectBase e in noteVisual.effectSubmodule.effectCollection["Generate"])
            {
                e.UpdateEffect(exactJudgeTime);
            }
            
            foreach (EffectBase e in noteVisual.effectSubmodule.effectCollection["StartHold"])
            {
                e.UpdateEffect(exactJudgeTime);
            }
            
            foreach (EffectBase e in noteVisual.effectSubmodule.effectCollection["Holding"])
            {
                e.UpdateEffect(exactJudgeTime);
            }
            
            if (isFirstJudged && songTime > holdEndTime)
            {
                isHolding = false;
                isFinalJudged = true;
                ExecuteFinalJudge();
                RemoveFromCheckingList();
            }

            if (isFirstJudged && bufferTimer < 0f)
            {
                isHolding = false;
                isFinalJudged = true;
                
                foreach (EffectBase e in noteVisual.effectSubmodule.effectCollection["StartHold"])
                {
                    e.Disrupt();
                }
                
                ExecuteFinalJudge();
                RemoveFromCheckingList();
            }
            
            if (!isFirstJudged && GameManager.instance.songTime > exactJudgeTime + judgeIntervals.afterMiss)
            {
                isFirstJudged = true;
                isFinalJudged = true;
                
                foreach (EffectBase e in noteVisual.effectSubmodule.effectCollection["StartHold"])
                {
                    e.Disrupt();
                }
                
                Miss(exactJudgeTime + judgeIntervals.afterMiss);
                RemoveFromCheckingList();
            }
        }
        
        private void LateUpdate()
        {
            isHolding = false;
        }
    }

    namespace Beatmap
    {
        public class Hold_BM : NoteBase_BM
        {
            public float holdEndTime;
            
            public Hold_BM()
            {

            }

            public Hold_BM(string elementName, Guid elementGuid, List<string> tags, GameElement_BM attachedElement, float exactJudgeTime, float holdEndTime)
                : base(elementName, elementGuid, tags, attachedElement, exactJudgeTime)
            {
                this.holdEndTime = holdEndTime;
            }

            public override void ExecuteBM()
            {
                matchedElement = Hold.GenerateElement(elementName, elementGuid, tags, false,
                    GetElement(attachedElementGuid), exactJudgeTime, holdEndTime);
            }
        }
    }
}