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

/// <summary>
/// 木马类
/// </summary>
public class TrojanHorse : Enemy, Boomer.I_CanBeBoomedObj
{
    //   _____       _     _ _      
    //  |  __ \     | |   | (_)     
    //  | |__) |   _| |__ | |_  ___ 
    //  |  ___/ | | | '_ \| | |/ __|
    //  | |   | |_| | |_) | | | (__ 
    //  |_|    \__,_|_.__/|_|_|\___|

    /// <summary>
    /// 攻击之间的间隔时间
    /// </summary>
    [Header("攻击之间的间隔时间")][FoldoutGroup("木马")]
    public float timeBetweenAttacks;
    /// <summary>
    /// 伊斯兰小怪的预制体
    /// </summary>
    [Header("伊斯兰小怪的预制体")][FoldoutGroup("预制体")]
    public GameObject yiSiLan;
    /// <summary>
    /// 召唤小怪攻击中,生成小怪之间间隔的最短时间
    /// </summary>
    [Header("召唤小怪攻击中,生成小怪之间间隔的最短时间")][FoldoutGroup("木马")]
    public float yiSiLanMinTime;
    // <summary>
    /// 召唤小怪攻击中,生成小怪之间间隔的最长时间
    /// </summary>
    [Header("召唤小怪攻击中,生成小怪之间间隔的最长时间")][FoldoutGroup("木马")]
    public float yiSiLanMaxTime;
    /// <summary>
    /// 炸弹的预制体,用来喷射的那种
    /// </summary>
    [Header("炸弹的预制体,用来喷射的那种")][FoldoutGroup("预制体")]
    public GameObject sprayBoomer;
    /// <summary>
    /// 喷射炸弹的时间间隔
    /// </summary>
    [Header("喷射炸弹的时间间隔")][FoldoutGroup("木马")]
    public float sprayBoomerTime;
    /// <summary>
    /// 喷射炸弹的方向
    /// </summary>
    [Header("喷射炸弹的方向")][FoldoutGroup("木马")]
    public Vector2 sprayBoomerDir;
    /// <summary>
    /// 喷射炸弹的力度倍数
    /// </summary>
    [Header("喷射炸弹的力度倍数")][FoldoutGroup("木马")]
    public float sprayBoomerMultiple;
    /// <summary>
    /// 召唤炸弹攻击,炸弹从天而降的初速度
    /// </summary>
    [Header("召唤炸弹攻击,炸弹从天而降的初速度")][FoldoutGroup("木马")]
    public Vector2 callBoomStartVelocity;

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

    /// <summary>
    /// 返回类型为协程、参数为空的委托类型
    /// </summary>
    private delegate IEnumerator Action();
    /// <summary>
    /// 开关,控制此时木马是否在移动
    /// </summary>
    [SerializeField][Header("此时木马是否在移动")][FoldoutGroup("状态")][ReadOnly]
    private bool isMove = false;
    /// <summary>
    /// 召唤伊斯兰小怪的初始位置
    /// </summary>
    private Transform callYiSiLanPosition;
    /// <summary>
    /// 喷射炸弹的起点
    /// </summary>
    private Transform sprayBoomerPosition;
    /// <summary>
    /// 召唤炸弹攻击的最左边
    /// </summary>
    private Transform callBoomerPositonLeft;
    /// <summary>
    /// 召唤炸弹攻击的最右边
    /// </summary>
    private Transform callBoomerPositonRight;
    /// <summary>
    /// 此时是否被打断?主要用来停止喷射攻击
    /// </summary>
    [Header("此时是否被打断")][SerializeField][FoldoutGroup("状态")][ReadOnly]
    private bool wasInterupt = false;

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

    void Start(){Init();}

    void Update(){
        //如果开关开着,则移动
        if(isMove)
            Move();
    }

    //   _   _                            _ 
    //  | \ | |                          | |
    //  |  \| | ___  _ __ _ __ ___   __ _| |
    //  | . ` |/ _ \| '__| '_ ` _ \ / _` | |
    //  | |\  | (_) | |  | | | | | | (_| | |
    //  |_| \_|\___/|_|  |_| |_| |_|\__,_|_| 
    private void Init(){
        //找到必须的组件和物体
        callYiSiLanPosition = transform.Find("小怪召唤点");
        sprayBoomerPosition = transform.Find("喷射炸弹点");
        callBoomerPositonLeft = transform.Find("召唤炸弹攻击最左点");
        callBoomerPositonRight = transform.Find("召唤炸弹攻击最右点");
    }

    /// <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、2中随机生成一种
        int r = Random.Range(0,3);
        if(r == 0)
            action = CallYiSiLan;
        else if(r == 1)
            action = SprayBoomer;
        else 
            action = CallBoomer;
        return SprayBoomer;
    }

    /// <summary>
    /// 攻击方式：召唤小怪
    /// </summary>
    private IEnumerator CallYiSiLan(){
        Debug.Log("正在使用:召唤伊斯兰");
        //循环若干次(这里先硬编码成3次)
        for(int i = 0; i < 3; i++){
            //实例化预制体
            YiSiLan yi = Instantiate(
                yiSiLan,
                callYiSiLanPosition.position,
                Quaternion.identity
            ).GetComponent<YiSiLan>();
            //等待范围内的随机时间
            yield return new WaitForSeconds(
                Random.Range(yiSiLanMinTime,yiSiLanMaxTime)
            );
        }
        ATKEnd();
    }
    /// <summary>
    /// 攻击方式：喷射炸弹💣
    /// </summary>
    /// <returns></returns>
    private IEnumerator SprayBoomer(){
        Debug.Log("正在使用:喷射炸弹");
        //循环若干次(这里先硬编码成3次)
        for(int i = 0; i < 3; i++){
            if(wasInterupt) break;
            //实例化预制体
            Boomer boomer = Instantiate(
                sprayBoomer,
                sprayBoomerPosition.position,
                Quaternion.identity
            ).GetComponent<Boomer>();
            //初始化喷出的炸弹
            //给予初始的速度
            yield return new WaitForEndOfFrame();
            boomer.m_rigidbody.velocity = sprayBoomerDir * (i + 1) * sprayBoomerMultiple;
            boomer.isThisCanBeReturned = true;
            //等待喷射炸弹时间间隔
            yield return new WaitForSeconds(sprayBoomerTime);
        }
        wasInterupt = false;
        ATKEnd();
    }
    /// <summary>
    /// 攻击方式：召唤炸弹💣
    /// </summary>
    /// <returns></returns>
    private IEnumerator CallBoomer(){
        Debug.Log("正在使用:召唤炸弹");
        //循环若干次(这里先硬编码成3次)
        for(int i = 0; i < 3; i++){
            //实例化预制体
            Boomer boomer = Instantiate(
                sprayBoomer,
                new Vector3(
                    //x取余范围内随机
                    Random.Range(callBoomerPositonLeft.position.x, 
                        callBoomerPositonRight.position.x),
                    //yz随起点
                    callBoomerPositonLeft.position.y,
                    callBoomerPositonLeft.position.z 
                ),
                Quaternion.identity
            ).GetComponent<Boomer>();
            //初始化喷出的炸弹
            //先等待本帧结束,创建炸弹完毕
            yield return new WaitForEndOfFrame();
            //给予初始的速度
            boomer.m_rigidbody.velocity = callBoomStartVelocity;
            //修改炸弹的落地爆炸时间
            boomer.landBoomTime = 1f;
            //等待喷射炸弹时间间隔
            yield return new WaitForSeconds(sprayBoomerTime);
        }
        ATKEnd();
    }
    /// <summary>
    /// 木马不停右移的函数,每帧调用一次,有开关控制
    /// </summary>
    private void Move(){
        //给自身位置加上向右的速度
        transform.position += new Vector3(
            speed * Time.deltaTime,0,0
        );
    }

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

    /// <summary>
    /// 当玩家进入监视范围(前期调试,后期可能需要安排演出)
    /// </summary>
    /// <param name="target"></param>
    protected override void OnFindThePlayer(Transform target){
        if(state == State.wander){
            //修改状态为发现玩家
            state = State.atk;
            //开始攻击
            StartCoroutine(StartAATK());
            //开始屏幕震动
            FindObjectOfType<VibrationManager>().HorseShake();
            //开始向右移动
            isMove = true;
        }
    }

    /// <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());}

    protected override void OnTouchThePlayer(MyPlayer player){
        //当创到玩家,让玩家受伤
        //告诉玩家，你被攻击了
        player.OnBeHit(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
    }


    //   _____       _             __               
    //  |_   _|     | |           / _|              
    //    | |  _ __ | |_ ___ _ __| |_ __ _  ___ ___ 
    //    | | | '_ \| __/ _ \ '__|  _/ _` |/ __/ _ \
    //   _| |_| | | | ||  __/ |  | || (_| | (_|  __/
    //  |_____|_| |_|\__\___|_|  |_| \__,_|\___\___|
    
    public void BeBoomed(float atk, int dir, Boomer boomer){
        if(boomer.isThisCanBeReturned){
            OnBeHit(MyPlayer.AtkMethod.反弹炸弹,dir);
            wasInterupt = true;            
        }
    }

    public Transform ObjTransform(){return transform;}

}