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

public enum Npcstate
{ 
  idle,
  dead,
  run
}

public class RecuseNpc : MonoBehaviour
{
    public static RecuseNpc instance;

    private Button recusebtn;

    private bool statebool = false;

    private Animator anim;

    public Npcstate nstate = Npcstate.dead;

    private bool movebool = false;
    public Transform target;
    private void Awake()
    {
        instance = this;
        recusebtn = GameObject.Find("Canvas/Recuse").GetComponent<Button>();
        anim = this.GetComponent<Animator>();
        
    }

    private void OnTriggerEnter(Collider other)//通过触发器得到对应的救援组人员标签，是否显现出UI
    {
        if(other.tag == "Player")
        recusebtn.gameObject.SetActive(true);
        if (statebool) return;
        other.GetComponent<CharacterInturn>().cha = this.gameObject ;
    }

    private void OnTriggerExit(Collider other)
    {
        recusebtn.gameObject.SetActive(false);
    }

    public void Setnpcstate()//点击救援按钮执行完动作后对按钮进行隐藏
    {   

        movebool = true;
        nstate = Npcstate.run;
        recusebtn.gameObject.SetActive(false);
        Debug.Log("Setnpcstate调用");
    }

    public void SetNpcDes(Vector3 tar)
    {
        target.position = tar;
    }

    private void Update()
    {
        if (Vector3.Distance(transform.position,target.position) < 1.3f && movebool && target.transform.position != null)//判断人物被救援后移动到目标位置
        {
            Debug.Log("到达目标点");
            nstate = Npcstate.idle;
            movebool = false;
        }
       

        switch (nstate)//通过枚举状态实现人物是否被救援，以及动作的改变
        {
            case Npcstate.idle:
                SetAni(2);
                break;
            case Npcstate.run:
                movebool = true;
                Run();
                break;
            case Npcstate.dead:
                SetAni(0);
                break;
        }
    }

    //跑步逻辑
    public void Run()
    {
        if (movebool)
        {
            SetAni(1);
            transform.LookAt(target);
            transform.position = Vector3.Lerp(transform.position, target.position, 0.3f * Time.deltaTime);
        }
    }


    public void SetAni(int x)
    {
        anim.SetInteger("state", x);
    }


}