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

/// <summary>
/// 以撒类,控制以撒Boss
/// </summary>
public class YiSa : Enemy
{
    //   _____       _     _ _      
    //  |  __ \     | |   | (_)     
    //  | |__) |   _| |__ | |_  ___ 
    //  |  ___/ | | | '_ \| | |/ __|
    //  | |   | |_| | |_) | | | (__ 
    //  |_|    \__,_|_.__/|_|_|\___|

    /// <summary>
    /// 攻击之间的间隔时间
    /// </summary>
    [Header("攻击之间的间隔时间")][FoldoutGroup("以撒")]
    public float timeBetweenAttacks;
    /// <summary>
    /// 攻击用鬼魂的预制体
    /// </summary>
    [Header("攻击用鬼魂的预制体")][FoldoutGroup("预制体")]
    public GameObject goust;
    /// <summary>
    /// 鬼魂攻击玩家时,生成位置离玩家的距离
    /// </summary>
    [Header("鬼魂攻击玩家时,生成位置离玩家的距离")][FoldoutGroup("以撒")]
    public float atkOffsetDistance;

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

    /// <summary>
    /// 返回类型为协程、参数为空的委托类型
    /// </summary>
    private delegate IEnumerator Action();
    private MyPlayer player;

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

    void Start(){
        Init();
        //测试用开启
        StartCoroutine(StartAATK());
    }


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

    private void Init(){
        //找到必要的物体和组件
        player = FindObjectOfType<MyPlayer>();
    }

    /// <summary>
    /// 执行一次攻击
    /// </summary>
    private IEnumerator StartAATK(){
        //等待攻击间隔
        yield return new WaitForSeconds(timeBetweenAttacks);
        //决定行动
        Action action = DecideAAction();
        //开始行动
        StartCoroutine(action());
    }

    /// <summary>
    /// 决定行动的函数
    /// </summary>
    private Action DecideAAction(){
        Action action;
        ///从0、1中随机生成一种
        int r = Random.Range(0,2);
        if(r == 0)
            action = Rush;
        else 
            action = Lighting;
        return action;
    }

    private IEnumerator Rush(){
        yield return new WaitForEndOfFrame();
        Debug.Log("以撒使用了冲撞");
        //当以撒使用冲撞时
        //首先构建一个生成位置,以玩家为中心,向随机位置偏移固定距离便是
        Vector3 appearPos = (
            //玩家位置
            player.transform.position + 
            //加上定长随机方向偏移量
            new Vector3(
                Random.Range(-1f,1f),Random.Range(-1f,1f),0
            ).normalized * 
            atkOffsetDistance
        );
        //在该位置生成一个鬼魂
        YiSaGoust t = Instantiate(
            goust,
            appearPos,
            Quaternion.identity
        ).GetComponent<YiSaGoust>();
        //让鬼魂淡出
        Tweener tweener = t.GetComponent<SpriteRenderer>().DOFade(1,0.5f);
        //记录一下本次攻击的冲撞方向
        Vector2 rushDir = player.transform.position - t.transform.position;
        //告知该鬼魂执行冲撞攻击
        yield return new WaitForSeconds(1f);
        t.RushATK(rushDir);
        //ATKEnd();
    }

    private IEnumerator Lighting(){
        yield return new WaitForEndOfFrame();
        Debug.Log("以撒使用了落雷");
        //在玩家头顶某位置召唤鬼魂
        YiSaGoust t = Instantiate(
            goust,player.transform.position + 
                new Vector3(0,2f,0),Quaternion.identity
        ).GetComponent<YiSaGoust>();
        //0.5秒淡入显示鬼魂
        Tweener tweener = t.GetComponent<SpriteRenderer>().DOFade(1,0.5f);
        //给玩家一秒的反应时间
        yield return new WaitForSeconds(1f);
        t.LightningATK();
        //ATKEnd();
    }

    /// <summary>
    /// 攻击结束的时候触发，重新开始新一轮攻击
    /// </summary>
    public void ATKEnd(){StartCoroutine(StartAATK());}

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

    /// <summary>
    /// 当有男童被救的时候从男童触发
    /// </summary>
    public void OnSave(Boy boy){
    }





}