using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;
using Sirenix.OdinInspector;

/// <summary>
/// 撞钟类，控制地藏头上的钟
/// </summary>
public class Bell : MonoBehaviour
{
    //   _____       _     _ _      
    //  |  __ \     | |   | (_)     
    //  | |__) |   _| |__ | |_  ___ 
    //  |  ___/ | | | '_ \| | |/ __|
    //  | |   | |_| | |_) | | | (__ 
    //  |_|    \__,_|_.__/|_|_|\___|

    /// <summary>
    /// 攻击前置动作钟上浮多少距离
    /// </summary>
    [Header("攻击前置动作钟上浮多少距离")]
    public float upDistance;
    /// <summary>
    /// 攻击将会持续多长时间
    /// </summary>
    [Header("攻击将会持续多长时间")]
    public float atkTime;
    /// <summary>
    /// 主人，也就是地藏Boss
    /// </summary>
    [HideInInspector]
    public DiZang owner;
    /// <summary>
    /// 钟飞上去将要花费多少时间（降下来也是这个值）
    /// </summary>
    [Header("钟飞上去将要花费多少时间（降下来也是这个值）")]
    public float upTime;
    /// <summary>
    /// 干扰多长时间能造成伤害和击飞?
    /// </summary>
    [Header("干扰多长时间能造成伤害和击飞?")]
    public float annoyingToHitTime;

    [Header("声波Shader")] 
    public BellShader bellShader;
    [Header("声波受击粒子")] 
    public GameObject particleObj;
    //   _____      _            _       
    //  |  __ \    (_)          | |      
    //  | |__) | __ ___   ____ _| |_ ___ 
    //  |  ___/ '__| \ \ / / _` | __/ _ \
    //  | |   | |  | |\ V / (_| | ||  __/
    //  |_|   |_|  |_| \_/ \__,_|\__\___|

    /// <summary>
    /// 当前正在攻击吗
    /// </summary>
    [SerializeField][Button][ReadOnly][Header("当前正在攻击吗(不包括钟上下过程))")]
    private bool isAtking = false;
    private MyPlayer player;
    /// <summary>
    /// 浮动动画,用来重启浮动动画解决Tween的一些局限性问题
    /// </summary>
    public Tweener floatTweener;
    private float annoyingToHitTimeLeft;
    /// <summary>
    /// 此时是否在干扰玩家
    /// </summary>
    [SerializeField]
    private bool isAnnoyingPlayer;
    /// <summary>
    /// 钟的初始位置
    /// </summary>
    private Vector3 startPositon;

    //    _____      _ _ ____             _    
    //   / ____|    | | |  _ \           | |   
    //  | |     __ _| | | |_) | __ _  ___| | __
    //  | |    / _` | | |  _ < / _` |/ __| |/ /
    //  | |___| (_| | | | |_) | (_| | (__|   < 
    //   \_____\__,_|_|_|____/ \__,_|\___|_|\_\

    void Start(){
        annoyingToHitTimeLeft = annoyingToHitTime;
        startPositon = transform.position;
        //启动浮动动画
        RestartFloat();
    }

    void Update(){
        //如果钟正在攻击
        if(isAtking)
        {
            bellShader.isBell = true;
            particleObj.SetActive(true);
            if(!player.isAnnoying){
                player.OnInAnnoying();
            }
            //创建一条从钟射向玩家的射线
            Ray2D ray = new Ray2D(
                (Vector2)transform.position,
                (Vector2)(player.transform.position - transform.position)
            );
            Debug.DrawRay(ray.origin,ray.direction * 1500,Color.red);
            //获取射线的碰撞结果
            RaycastHit2D hit2D;
            hit2D = Physics2D.Raycast(ray.origin,ray.direction);
            if(hit2D){
                Debug.Log(hit2D.collider.name);
            }
            //如果射线击中玩家并且玩家未处于被攻击状态,说明刚被击中,触发玩家的被干扰事件
            if(hit2D.collider.TryGetComponent<MyPlayer>(out MyPlayer trash) ){
                // player.OnInAnnoying();
                isAnnoyingPlayer = true;
            }
                
            //如果没有击中玩家,但是玩家处于被攻击状态,说明玩家脱离了攻击,触发玩家解除干扰事件
            else if(!hit2D.collider.TryGetComponent<MyPlayer>(out MyPlayer trash1)){
                //player.OnOutAnnoying();
                isAnnoyingPlayer = false;
                annoyingToHitTimeLeft = annoyingToHitTime;
            }
        }
        if(isAnnoyingPlayer){
            annoyingToHitTimeLeft -= Time.deltaTime;
            if(annoyingToHitTimeLeft <= 0){
                //告诉玩家，你被攻击了
                player.OnBeHit(owner.ATK, 
                            ((transform.position.x - 
                                player.transform.position.x)
                                > 0) ? 1 : -1);//通过自身位置和玩家位置的比较来返回玩家本次的受击方向
                //恢复CD
                annoyingToHitTimeLeft = annoyingToHitTime;
            }
        }
    } 


    //   _   _                            _ 
    //  | \ | |                          | |
    //  |  \| | ___  _ __ _ __ ___   __ _| |
    //  | . ` |/ _ \| '__| '_ ` _ \ / _` | |
    //  | |\  | (_) | |  | | | | | | (_| | |
    //  |_| \_|\___/|_|  |_| |_| |_|\__,_|_|  

    /// <summary>
    /// 介于Tweener的特性，经常需要重新创建钟浮动的动画
    /// </summary>
    private void RestartFloat(){
        if(floatTweener != null){
            floatTweener.Kill();
        }
        Tweener tweener = transform.DOShakePosition(5f,0.3f,1,90,false,false);
        tweener.SetLoops(-1);
        tweener.SetEase(Ease.InQuad);
        floatTweener = tweener;
    }

    //   ______               _   
    //  |  ____|             | |  
    //  | |____   _____ _ __ | |_ 
    //  |  __\ \ / / _ \ '_ \| __|
    //  | |___\ V /  __/ | | | |_ 
    //  |______\_/ \___|_| |_|\__|

    /// <summary>
    /// 从主人那里得到攻击指令后触发
    /// </summary>
    public void ATK(MyPlayer player){
        //指定一下攻击目标
        this.player = player;
        //创建和执行上浮动画
        Tweener tweener = transform.DOLocalMoveY(
            transform.position.y + upDistance,
            upTime
        );
        //创建并加入上浮动画结束事件
        TweenCallback action = () => {
            //标记自己开始攻击
            isAtking = true;
            //重启浮动动画
            RestartFloat();
            //等待攻击结束
            StartCoroutine(WaitAndTurnDownThebutton());
        };
        tweener.OnComplete(action);
    }

    /// <summary>
    /// 上浮动画结束的时候触发
    /// </summary>
    /// <returns></returns>
    private IEnumerator WaitAndTurnDownThebutton(){
        //等待攻击时长结束
        yield return new WaitForSeconds(atkTime);
        //标记攻击结束
        isAtking = false;
        //触发自身攻击结束功能
        ATKEnd();
    }

    /// <summary>
    /// 攻击结束的时候触发
    /// </summary>
    private void ATKEnd()
    {
        bellShader.isBell = false;
        bellShader.Remake = true;
        particleObj.SetActive(false);
        //如果玩家仍处于被干扰状态,解除干扰
        if(player.isAnnoying) player.OnOutAnnoying();
        annoyingToHitTimeLeft = annoyingToHitTime;
        isAnnoyingPlayer = false;
        //创建动画让钟回去
        Tweener tweener  = 
            //transform.DOMoveY(transform.position.y - upDistance,upTime);
            transform.DOMove(startPositon,upTime);
        //创建和添加结束事件
        TweenCallback action = () => {
            //重启浮动动画
            RestartFloat();
            //告诉主人，攻击结束，开始下一个轮回
            owner.ATKEnd();
        };
        tweener.OnComplete(action);
    }

}