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

/// <summary>
/// 伊斯兰小怪类
/// </summary>
public class YiSiLan : Enemy
{
    //   _____       _     _ _      
    //  |  __ \     | |   | (_)     
    //  | |__) |   _| |__ | |_  ___ 
    //  |  ___/ | | | '_ \| | |/ __|
    //  | |   | |_| | |_) | | | (__ 
    //  |_|    \__,_|_.__/|_|_|\___|

    [FoldoutGroup("其他",false,0)][Header("怪物死后旋转速度的随机区间")]
    public float deadRotationRangeMax;
    [FoldoutGroup("其他",false,0)]
    public float deadRotationRangeMin;
    /// <summary>
    /// 抓到玩家后多长事件触发爆炸
    /// </summary>
    [Header("抓到玩家后多长事件触发爆炸")][FoldoutGroup("伊斯兰")]
    public float boomTime;
    /// <summary>
    /// 被击飞力度的调整值
    /// </summary>
    [Header("被攻击后击飞的力度调整值")][FoldoutGroup("其他",false,0)]
    public Vector2 hitToflyParameter;

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

    private Rigidbody2D m_rigidbody;
    /// <summary>
    /// seek函数中的追踪目标
    /// </summary>
    private Transform target;
    /// <summary>
    /// 记录此时玩家是否在爆炸范围内
    /// </summary>
    private bool canHitPlayer;

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

    void Start(){Init();}//初始化
    void FixedUpdate(){if(state == State.seek)Seek();}//seek

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

    private void Init(){
        //初始化状态为Seek
        state = State.seek;
        //找到必要的组件
        m_rigidbody = GetComponent<Rigidbody2D>();
        target = FindObjectOfType<MyPlayer>().transform;
    }

    /// <summary>
    /// 寻找函数，每Fixed调用
    /// </summary>   
    private void Seek(){
        //构造一个方向，1代表向右，-1代表向左
        int dir = (target.position.x - transform.position.x > 0) ? 1:-1;
        //使刚体水平方向上获得速度
        m_rigidbody.velocity = new Vector2(speed * dir,
                                        m_rigidbody.velocity.y);
        //矫正一下faceDir的问题,使其始终朝向玩家
        transform.rotation = Quaternion.
            Euler
                (transform.rotation.x, 
                ((dir == 1) ? 0:-180),
                transform.rotation.z);
    }
    /// <summary>
    /// 伊斯兰爆炸的时候Call这个，通过协程触发，因为爆炸有个延时
    /// </summary>
    private void Boom(){
        OnDead();
        if(canHitPlayer){
            FindObjectOfType<MyPlayer>().OnBeHit(ATK,(target.position.x - transform.position.x > 0) ? -1:1);
            //加一个扭矩，营造死亡的效果
            m_rigidbody.AddTorque(Random.Range(deadRotationRangeMin,deadRotationRangeMax) * 
                                                ((target.position.x - transform.position.x > 0) ? -1:1));
        }
    }

    /// <summary>
    /// 被击飞的击飞效果处理
    /// </summary>
    /// <param name="dir">被击方向</param>
    public void BeHitToFly(int dir){
        m_rigidbody.velocity += new Vector2( //给予自身一个
            -1 * dir * hitToflyParameter.x,//X方向为力度系数乘以受击方向
            hitToflyParameter.y//Y方向为力度系数
            //的绝对的速度
        );
    }

    /// <summary>
    /// 协程用，删除自己这个游戏物体
    /// </summary>
    protected void Dead(){Destroy(gameObject);}

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

    protected override void OnTouchThePlayer(MyPlayer player){Invoke("Boom",boomTime);}
    protected override void OnDead(){
        //标记当前状态为死亡
        state = State.dead;
        //加一个扭矩，营造死亡的效果
        m_rigidbody.AddTorque(Random.Range(deadRotationRangeMin,deadRotationRangeMax) * 
                                            ((target.position.x - transform.position.x > 0) ? -1 : 1));
        //关掉自己的碰撞体
        GetComponent<BoxCollider2D>().enabled = false;
        //两秒后自己毁灭
        Invoke("Dead",2f);
    }

    public override void OnBeHit(MyPlayer.AtkMethod hitMethod, int hitDir){
        //让自己被击飞
        BeHitToFly(hitDir);
        //结算生命值
        HPLeft -= MyPlayer.atkMethodMagnification[hitMethod];
        //看下死了没
        //死了就记录下死亡时候的面部朝向，用来做死亡翻滚效果，然后再Call一下死亡事件
        if(CheckDead()) {OnDead();}
        //被打飞了在着地前都不会挨打了
        canBeHit = false;
    }

    //    _____      _ _ _     _             
    //   / ____|    | | (_)   (_)            
    //  | |     ___ | | |_ ___ _  ___  _ __  
    //  | |    / _ \| | | / __| |/ _ \| '_ \ 
    //  | |___| (_) | | | \__ \ | (_) | | | |
    //   \_____\___/|_|_|_|___/_|\___/|_| |_|

    //触发器代表炸弹范围，进入说明能炸到，离开说明炸不到了
    protected override void OnTriggerEnter2D(Collider2D other){
        base.OnTriggerEnter2D(other);
        canHitPlayer = true;
    }
    void OnTriggerExit2D(Collider2D other){canHitPlayer = false;}

}