using System;
using System.Collections.Generic;
using System.Linq;
using Dreamteck.Splines;
using Ichni.RhythmGame.Beatmap;
using Ichni.RhythmGame.ThemeBundles.DepartureToMultiverse.Beatmap;
using UniRx;
using UnityEngine;

namespace Ichni.RhythmGame.ThemeBundles.DepartureToMultiverse
{
    public partial class DTMNoteVisualHold : DTMNoteVisual, INoteVisualHold, IHaveTransformSubmodule
    {
        public Hold hold { get; set; }
        
        public MeshGenerator meshGenerator;
        public SplinePositioner headPoint, tailPoint;
        
        public static DTMNoteVisualHold GenerateElement(string elementName, Guid id, List<string> tags,
            bool isFirstGenerated,  GameElement parentElement, string themeBundleName, string objectName)
        {
            DTMNoteVisualHold noteVisualHold = SubstantialObject.GenerateElement(elementName, id, tags, 
                isFirstGenerated, themeBundleName, objectName, parentElement).GetComponent<DTMNoteVisualHold>();
            
            return noteVisualHold;
        }
        
        public override void FirstSetUpObject(bool isFirstGenerated)
        {
            NoteBase note = parentElement as NoteBase;
            if(note == null) throw new System.Exception("NoteVisual只能生成在Note下。");
            if(!note.isOnTrack) throw new System.Exception("这种HoldNoteVisual只能生成在Track上。");
            
            this.note = note;
            note.noteVisual = this;
            this.hold = note as Hold;
            
            this.headPoint = notePartList[0].GetComponent<SplinePositioner>();
            this.meshGenerator = notePartList[1].GetComponent<MeshGenerator>();
            this.tailPoint = notePartList[2].GetComponent<SplinePositioner>();

            this.hold.trackPositioner.autoUpdate = false;
            
            headPoint.spline = hold.track.trackPathSubmodule.path;
            meshGenerator.spline = hold.track.trackPathSubmodule.path;
            tailPoint.spline = hold.track.trackPathSubmodule.path;
        }
        
        public override void AfterInitialize()
        {
            base.AfterInitialize();
            Recover();
        }

        public override void Recover()
        {
            foreach (GameObject part in notePartList)
            {
                Renderer rend = part.GetComponent<Renderer>();
                if (rend != null)
                {
                    rend.material.SetFloat("_MainAlpha", 1f);
                }
            }

            foreach (EffectBase effect in effectSubmodule.effectCollection["Generate"])
            {
                effect.Recover();
            }
        }
    }
    
    public partial class DTMNoteVisualHold
    {
        public override void SaveBM()
        {
            matchedBM = new DTMNoteVisualHold_BM(elementName, elementGuid, tags, parentElement.matchedBM as GameElement_BM, themeBundleName, objectName);
        }

        private float startPercent, endPercent;

        public void UpdateHoldInMovableTrack()
        {
            if (effectSubmodule.effectCollection["Generate"].Any(e => e.nowEffectState == EffectBase.EffectState.Middle))
            {
                return;
            }
            
            TrackTimeSubmoduleMovable trackTimeSubmoduleMovable = hold.track.trackTimeSubmodule as TrackTimeSubmoduleMovable;
            
            startPercent = trackTimeSubmoduleMovable.GetTrackPercent(hold.exactJudgeTime + hold.holdingTime);
            endPercent = trackTimeSubmoduleMovable.GetTrackPercent(hold.holdEndTime);

            hold.trackPositioner.SetPercent(startPercent);
            meshGenerator.SetClipRange(startPercent, endPercent);
            headPoint.SetPercent(startPercent);
            tailPoint.SetPercent(endPercent);
        }

        public void UpdateHoldInStaticTrack()
        {
            //throw new NotImplementedException();
        }
        
        public void UpdateTransform(bool refreshAll = true)
        {
            bool willRefresh = false;

            if (transformSubmodule.positionDirtyMark)
            {
                transformSubmodule.currentPosition = transformSubmodule.originalPosition + transformSubmodule.positionOffset;
                transformSubmodule.positionDirtyMark = false;
                willRefresh = true;
                transformSubmodule.positionOffset = Vector3.zero;
            }

            if (refreshAll && willRefresh)
            {
                Refresh();
            }
        }

        public override void Refresh()
        {
            base.Refresh();
            
            Vector2 posOffset = new Vector2(transformSubmodule.currentPosition.x, transformSubmodule.currentPosition.y);
            hold.trackPositioner.motion.offset = posOffset;
            meshGenerator.offset = posOffset;
            headPoint.motion.offset = posOffset;
            tailPoint.motion.offset = posOffset;
        }
    }
    
    namespace Beatmap
    {
        public class DTMNoteVisualHold_BM : SubstantialObject_BM
        {
            public DTMNoteVisualHold_BM()
            {
                
            }

            public DTMNoteVisualHold_BM(string elementName, Guid id, List<string> tags, 
                GameElement_BM parent, string themeBundleName, string objectName) :
                base(elementName, id, tags, parent, themeBundleName, objectName)
            {
               
            }

            public override void ExecuteBM()
            {
                matchedElement = DTMNoteVisualHold.GenerateElement(elementName, elementGuid, tags, false, 
                    GetElement(attachedElementGuid), themeBundleName, objectName);
            }
            
            public override GameElement DuplicateBM(GameElement parent)
            {
                return DTMNoteVisualHold.GenerateElement(elementName, Guid.NewGuid(), tags, false, parent, themeBundleName, objectName);
            }
        }
    }
}