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

public class playerLogic : MonoBehaviour
{
    [Tooltip("子彈實體")]
    public GameObject bulletPrefab;
    [Tooltip("子彈目錄")]
    public Transform bulletFolder;
    [Tooltip("子彈間隔")]
    public float bulletInterval = 0.5f;
    [Tooltip("子彈開火點")]
    public Transform bulletFirePoint;
    [Tooltip("玩家移動速度")]
    public float playerSpeed = 1.0f;
    [Tooltip("子彈爆炸prefab")]
    public GameObject bulletExplosion;


    //fire
    public void FireOn()
    {
        //定時器，每隔0.1s秒，開火一次
        //Invoke("fire", bulletInterval, bulletInterval);
        InvokeRepeating("fire", 0.01f, bulletInterval);
    }

    public void FireOff()
    {
        //關閉某個定時器（執行fire函數）
        CancelInvoke("fire");

        //關閉全部定時器
        //CancelInvoke();
    }
    // Update is called once per frame
    void Update()
    {
        if(Input.GetKey(KeyCode.A))
        {
            //（1）用translate慢慢位移
            //this.transform.Translate(0, 0, -1*playerSpeed * Time.deltaTime);
            //this.transform.Translate(new Vector3(0, 0, -5) * Time.deltaTime);
            //this.transform.Translate(Vector3.back * Time.deltaTime);
            //this.transform.Translate(Vector3.back * Time.deltaTime, Space.Self);
            //this.transform.Translate(Vector3.back * Time.deltaTime, Space.World);
            //this.transform.Translate(Vector3.back * Time.deltaTime, Camera.main.transform);
            //（2）用positino瞬間移動
            //注意：Space.Self只針對Translate才能用，但是不能用在position
            //this.transform.position -= new Vector3(0, 0, 1);
            //this.transform.position += new Vector3(0, 0, -1);
            this.transform.position += Vector3.back* playerSpeed;           
        }
        else if(Input.GetKey(KeyCode.D))
        {
            //this.transform.Translate(Vector3.forward * Time.deltaTime*playerSpeed);
            this.transform.position += Vector3.forward* playerSpeed;

        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.name != "Monster(Clone)") return;
        //產生爆炸預鑄件
        GameObject node1 = Instantiate(bulletExplosion, null);
        node1.transform.position = this.transform.position;

        //播放爆炸音效
        //注意：爆炸音效要放在爆炸預鑄件prefab，不要放在子彈或主角（因為被destory了，就無法播放音效）
        node1.GetComponent<AudioSource>().Play();

        //銷毀玩家，與怪物
        Destroy(this.gameObject);
        Destroy(other.gameObject);
    }
    void fire()
    {
        GameObject node = Instantiate(bulletPrefab, bulletFolder);
        node.transform.position = bulletFirePoint.position;
    }
}