using Game;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class PlayRoleSnapshotClass
{
    public float time;
    public Sprite mSprite;
    public Vector3 BridgeDir;
    public Vector3 Pos;
    public void Reset()
    {
        time = 0;
        mSprite = null;
        BridgeDir = Vector3.zero;
        Pos = Vector3.zero;
    }
}

public class RoleFastShadow : MonoBehaviour
{
    protected Transform mBridgeTransfrom;
    protected Transform mModelTransfrom;
    protected SpriteRenderer mSpriteRenderer;
    Vector3 offset = new Vector3(0, 0, 0.1f);

    public int CurrPlayIndex = -1;
    public float NextPlayTime = 0;
    public float SnapStepStartTime = 0;
    public Vector3 SnapStepStartPos = Vector3.zero;
    public Vector3 NextPos = Vector3.zero;
    public bool bCanPlay = false;
    public float StartPlayTime;

    #region 缓存
    static Queue<PlayRoleSnapshotClass> tempHistoryQueue = new Queue<PlayRoleSnapshotClass>();
    List<PlayRoleSnapshotClass> KeyHistory = new List<PlayRoleSnapshotClass>();
    const int HistoryLimit = 30;

    static PlayRoleSnapshotClass EnqueueOneHistory()
    {
        if (tempHistoryQueue.Count > 0)
            return tempHistoryQueue.Dequeue();

        return new PlayRoleSnapshotClass();
    }

    public void AddSnap(float _time,Sprite sprite, Vector3 bridgeDir, Vector3 pos)
    {
        while (KeyHistory.Count > HistoryLimit)
        {
            KeyHistory[0].Reset();
            tempHistoryQueue.Enqueue(KeyHistory[0]);
            KeyHistory.RemoveAt(0);
        }

        PlayRoleSnapshotClass snap = EnqueueOneHistory();
        snap.time = _time;
        snap.mSprite = sprite;
        snap.BridgeDir = bridgeDir;
        snap.Pos = pos;
        KeyHistory.Add(snap);
    }

    public void ClearHistory()
    {
        for (int i = 0; i < KeyHistory.Count; i++)
        {
            KeyHistory[i].Reset();
            tempHistoryQueue.Enqueue(KeyHistory[i]);
        }
        KeyHistory.Clear();
    }
    #endregion

    void OnEnable()
    {
        mBridgeTransfrom = transform.Find("Bridge");
        mModelTransfrom = mBridgeTransfrom.Find("Model");
        mSpriteRenderer = mModelTransfrom.GetComponent<SpriteRenderer>();
        mBridgeTransfrom.gameObject.SetActive(false);
        LoadData();
    }

    public void LoadData()
    {
        RoleSnapshotClass[] srcData = GamePlayEntry.MainPlayer.Player.mRoleSnapshot.GetHistoryArray();
        float time = 0;
        Vector3 pos;
        Vector3 dir = Vector3.zero;
        for (int i = 0; i < srcData.Length; i++)
        {
            if (i > 0)
            {
                time = srcData[i].time - srcData[0].time;
                time = time / 2f;
                dir = srcData[i].Pos - srcData[i - 1].Pos;
                //多一步的位置
                pos = srcData[i].Pos + (dir * 4f);
            }
            else
            {
                pos = srcData[i].Pos;
            }
            AddSnap(time, srcData[i].mSprite, srcData[i].BridgeDir, pos);
        }

        if (KeyHistory.Count > 0)
        {
            bCanPlay = true;
            StartPlayTime = 0;
            CurrPlayIndex = -1;
            NextPlayTime = 0;
            StartPlayTime = Time.time; 
            NextPos = Vector3.zero;
        }
    }

    public void Update()
    {
        if (NextPos != Vector3.zero)
        {
            if (NextPlayTime - SnapStepStartTime <= 0)//避免分母为0
                return;

            Vector3 stepPr = ( (NextPos - SnapStepStartPos) * (Time.time - SnapStepStartTime) / (NextPlayTime - SnapStepStartTime) );
            transform.position = SnapStepStartPos + stepPr + offset;
        }

        //未到达播放下一帧的事件
        if (!bCanPlay || Time.time < NextPlayTime)
            return;

        CurrPlayIndex++;

        PlayRoleSnapshotClass snap = KeyHistory[CurrPlayIndex];

        //播放
        mBridgeTransfrom.gameObject.SetActive(true);
        mSpriteRenderer.sprite = snap.mSprite;
        mBridgeTransfrom.localEulerAngles = snap.BridgeDir;
        transform.position = snap.Pos + offset;
        SnapStepStartPos = transform.position;
        SnapStepStartTime = Time.time;

        //没有后续帧了
        if (KeyHistory.Count < CurrPlayIndex + 2)
        {
            bCanPlay = false;
            Invoke("EndEff", 0.05f);
        }
        else//后续帧
        {
            NextPlayTime = StartPlayTime + KeyHistory[CurrPlayIndex + 1].time;
            NextPos = KeyHistory[CurrPlayIndex + 1].Pos;
        }
    }

    //public void SetData(Sprite sprite, Vector3 BridgelocalEulerAngles, Vector3 targetWorldPos)
    //{
    //    mBridgeTransfrom.gameObject.SetActive(true);
    //    mSpriteRenderer.sprite = sprite;
    //    mBridgeTransfrom.localEulerAngles = BridgelocalEulerAngles;
    //    transform.position = targetWorldPos + offset;
    //    Invoke("EndEff", 0.3f);
    //}

    public void EndEff()
    {
        this.gameObject.SetActive(false);
        ClearHistory();
    }
}