using DG.Tweening;
using DG.Tweening.Core;
using DG.Tweening.Plugins.Options;
using Spine.Unity;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using AnimationState = Spine.AnimationState;

public class IVPet : MonoBehaviour
{
    [SerializeField]
    private Transform trfTarget;
    [SerializeField]
    private float fMoveSpeed = 0.1f;
    [SerializeField]
    private Vector3 v3Offset = Vector3.zero;
    private Vector3 v3OffsetRev = Vector3.zero;
    private Vector3 v3posto;
    private Vector3 v3RandomPos;
    private Vector3 v3dir;

    private SkeletonAnimation skAnim;

    private TweenerCore<Vector3, Vector3, VectorOptions> twcSummon = null;
    private TweenerCore<Vector3, Vector3, VectorOptions> twcSummonRev = null;
    private TweenerCore<Vector3, Vector3, VectorOptions> twcUnsummon = null;
    private TweenerCore<Vector3, Vector3, VectorOptions> twcUnsummonRev = null;
    private TweenerCore<Vector3, Vector3, VectorOptions> twcMove = null;
    private TweenerCore<Vector3, Vector3, VectorOptions> twcMoveX = null;

    private int Key = -1;
    private bool bFrontRight = true;

    private bool bInitNeed = true;
    [SerializeField]
    private bool bSet = true;
    private bool bMove = false;
    private bool bMoveFlag = false;
    private bool bSummoning = false;

    private AnimationState anState;
    private AsyncOperationHandle<SkeletonDataAsset> handlePet;

    public void Init()
    {
        Transform trfwrapper = transform.GetChild(0);
        Transform trfpet = trfwrapper.GetChild(0);
        skAnim = trfpet.GetComponent<SkeletonAnimation>();
        twcSummon = transform.DOScale(Global.V3_1, 0.2f).ChangeStartValue(Global.V3_001).SetEase(Ease.OutQuad).OnComplete(SummonEnd).SetAutoKill(false).Pause();
        twcSummonRev = transform.DOScale(Global.V3_1XRev, 0.2f).ChangeStartValue(Global.V3_001XRev).SetEase(Ease.OutQuad).OnComplete(SummonEnd).SetAutoKill(false).Pause();
        twcUnsummon = transform.DOScale(Global.V3_001, 0.2f).ChangeStartValue(Global.V3_1).SetEase(Ease.InQuad).OnComplete(UnsummonEnd).SetAutoKill(false).Pause();
        twcUnsummonRev = transform.DOScale(Global.V3_001XRev, 0.2f).ChangeStartValue(Global.V3_1XRev).SetEase(Ease.InQuad).OnComplete(UnsummonEnd).SetAutoKill(false).Pause();
        transform.position = trfTarget.position + Random.insideUnitSphere * Random.Range(5, 7);

        bInitNeed = false;
    }

    #region Summon
    // 펫 소환 완료.
    private void SummonEnd()
    {
        twcMove.Play();
        twcMoveX.Play();
        bSummoning = false;
    }

    // 펫 소환 해제 완료.
    private void UnsummonEnd()
    {
        gameObject.SetActive(false);
    }
    
    // 펫 소환.
    public void Summon()
    {
        if (Key < 0)
            return;
        v3RandomPos = Random.insideUnitCircle * Random.Range(3, 5);
        transform.position = new Vector3(trfTarget.position.x + v3RandomPos.x, trfTarget.position.y + v3RandomPos.y, (trfTarget.position.y + v3RandomPos.y)*0.1f);

        if (bFrontRight)
            twcSummon.Restart();
        else
            twcSummonRev.Restart();
        gameObject.SetActive(true);
        anState = skAnim.AnimationState;
        if (bSet)
        {
            bMove = false;
            anState.SetAnimation(0, "idle", true);
        }
    }

    // 펫 소환 해제.
    public void Unsummon()
    {
        if (Key < 0)
            return;

        bSummoning = true;
        twcMove.Pause();
        twcMoveX.Pause();
        if (bFrontRight)
            twcUnsummon.Restart();
        else
            twcUnsummonRev.Restart();
    }

    // 펫 끄기.
    public void OffPet()
    {
        twcMove.Pause();
        twcMoveX.Pause();
        gameObject.SetActive(false);
    }
    #endregion Summon


    #region Set
    public bool IsPetOn()
    {
        return Key >= 0;
    }

    public void SetPet(int key)
    {
        // 변경사항 없음.
        if (key == Key)
            return;

        // 펫 없음.
        if (key < 0)
        {
            if (Key >= 0)
            {
                Key = -1;
                bSet = false;
                if (skAnim.skeletonDataAsset != null)
                    skAnim.skeletonDataAsset.Clear();
                skAnim.ClearState();
                gameObject.SetActive(false);
            }
            return;
        }

        // 펫 있음.
        Key = key;
        bSet = false;
        CoverCamera.Hold();
        if (skAnim.skeletonDataAsset != null)
            skAnim.skeletonDataAsset.Clear();
        skAnim.ClearState();

        //@ for test
        switch (key)
        {
            case 33:
                key = 44;
                break;
        }
        Addressables.LoadAssetAsync<SkeletonDataAsset>(FormatString.StringFormat(AddressableMgr.PathPet, key.ToString())).Completed += ALoadPetComp;
    }
    #endregion Set


    #region Position
    protected void LateUpdate()
    {
        if (bInitNeed || bSummoning)
            return;

        // = trfTarget.position;

        // 거리가 5이상 멀어지고, 이동이 불가능한 상태면 다음 위치 할당 후 MoveFlag를 true로 변경
        if (BattleMgr.SCalcDistance(trfTarget.position, transform.position) > 4 && !bMoveFlag)
        {
            if (bFrontRight)
            {
                v3RandomPos = Random.insideUnitCircle * Random.Range(3, 5);
                bMoveFlag = true;
                anState.SetAnimation(0, "move", true);
            }
            else
            {
                v3RandomPos = Random.insideUnitCircle * Random.Range(3, 5); //trfTarget.position + v3OffsetRev;
                bMoveFlag = true;
                anState.SetAnimation(0, "move", true);
            }

            v3RandomPos.y = Mathf.Clamp(v3RandomPos.y, v3RandomPos.y, 0);
        }
        
        // MoveFlag가 true면 이동 시작
        if(bMoveFlag)
        {
            if (bSet)
            {
                v3posto = new Vector3(trfTarget.position.x + v3RandomPos.x,trfTarget.position.y + v3RandomPos.y, (trfTarget.position.y + v3RandomPos.y) * 0.1f);
                v3dir = (v3posto - transform.position).normalized;
                transform.position = transform.position + v3dir * (0.1f * fMoveSpeed); // Vector3.Lerp(transform.position, v3posto, fSmoothSpeed);
                float fdistance = BattleMgr.SCalcDistance(transform.position, v3posto);
                ChangeFrontToTarget();
                if (fdistance <= 1.3f && bMove)
                {
                    bMove = false;
                    bMoveFlag = false;
                    anState.SetAnimation(0, "idle", true);
                }
                
                if (fdistance > 1.3f && !bMove)
                {
                    bMove = true;
                    anState.SetAnimation(0, "move", true);
                }
                
            }
        }
    }

    // 바라보는 방향 및 위치 초기화.
    public void SetFront(bool bfrontright)
    {
        bFrontRight = bfrontright;
        if (bFrontRight)
        {
            transform.localScale = Global.V3_1;
            transform.position = trfTarget.position + v3Offset;
        }
        else
        {
            transform.localScale = Global.V3_1XRev;
            transform.position = trfTarget.position + v3OffsetRev;
        }
    }

    // 바라보는 방향 변경.
    public void ChangeFront(bool bfrontright)
    {
        if (bfrontright == bFrontRight)
            return;
        bFrontRight = bfrontright;
        if (bFrontRight)
            transform.localScale = Global.V3_1;
        else
            transform.localScale = Global.V3_1XRev;
    }
    public void ChangeFrontToTarget()
    {
        if (transform.position.x - v3posto.x < -0.1f)
            transform.localScale = Global.V3_1;
        else if (transform.position.x - v3posto.x > 0.1f)
            transform.localScale = Global.V3_1XRev;
        else
            return;
    }
    #endregion Position


    #region Addressable
    private void ALoadPetComp(AsyncOperationHandle<SkeletonDataAsset> obj)
    {
        skAnim.skeletonDataAsset = obj.Result;
        skAnim.Initialize(true);
        anState = skAnim.AnimationState;
        //AtlasUtilities.ClearCache();

        if (handlePet.IsValid())
        {
            Addressables.Release(handlePet);
            AddressableMgr.SAddUnload();
        }

        handlePet = obj;
        CoverCamera.Release();
        bSet = true;

        if (BattleMgr.Instance.BattlePause)
            return;
        Summon();
    }
    #endregion Addressable
}