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

public class Blockhouse : MonoBehaviour
{
    //碉堡类敌人的控制代码

    [Tooltip("请填入开枪的间隔时间")]
    public float firingInterval;
    private ShootingArea[] shootingAreas;
    private bool isShooting;//记录此时自己是否正在射击

    void Start()
    {
        shootingAreas = new ShootingArea[transform.childCount];
        for(int i = 0; i < transform.childCount; i++)
        {
            shootingAreas[i] = transform.GetChild(i).
                                gameObject.AddComponent<ShootingArea>();//给每个子物体挂上射击区的脚本
            //并且把它的脚本送到数组里面，免去以后再遍历拖慢速度
        }
    }

    void Update()
    {
        if(isShooting) Shooting();
    }

    void OnTriggerEnter2D(Collider2D other)
    {
        if(other.tag == "Player")
        {
            //当玩家进入监视区，开始每隔时间进行扫射
            InvokeRepeating("ShootOrStopShoot",firingInterval,firingInterval);

            //
            foreach(ShootingArea s in shootingAreas)
            {
                s.GetComponent<SpriteRenderer>().color = Color.yellow;
            }
            //
        }
    }

    void  OnTriggerExit2D(Collider2D other)
    {
        if(other.tag == "Player")
        {
            //当玩家退出监视区，取消扫射的Invoke
            CancelInvoke("ShootOrStopShoot");

            //
            foreach(ShootingArea s in shootingAreas)
            {
                s.GetComponent<SpriteRenderer>().color = Color.white;
            }
            //
        }


    }

    //定时触发，反正就是更改射击状态，射到不射或者不射到射
    private void ShootOrStopShoot()
    {
        if(isShooting) 
        {
            isShooting = false;

            //
            foreach(ShootingArea s in shootingAreas)
            {
                s.GetComponent<SpriteRenderer>().color = Color.yellow;
            }
            //
        }
        else 
        {
            isShooting = true;

            //
            foreach(ShootingArea s in shootingAreas)
            {
                s.GetComponent<SpriteRenderer>().color = Color.red;
            }
            //
        }
    }
    //正在射击的时候触发，每帧检测是否被击中
    private void Shooting()
    {
        foreach(ShootingArea s in shootingAreas)
        {
            if(s.IsPlayerHere())
            {
                Debug.Log("玩家被击中！");
            }
        }
    }

    private class ShootingArea : MonoBehaviour
    {
        //射击区类，我懒得再单写一个脚本了，里面东西很少
        private bool isPlayerHere = false;//记录玩家是否在内部

        void OnTriggerEnter2D(Collider2D other)
        {
            if(other.tag == "Player")
            {
                //当玩家进入射击区，更改判断标志
                isPlayerHere = true;
            }
        }
        void  OnTriggerExit2D(Collider2D other)
        {
            if(other.tag == "Player")
            {
                //当玩家退出射击区，更改判断标志
                isPlayerHere = false;
            }
        }
        
        public bool IsPlayerHere(){return isPlayerHere;}//返回玩家是否在这个射击区内的结果
    }

}