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

public class HomingPlayerLaser : MonoBehaviour
{

    [SerializeField] private float _speed = 8f;
    [SerializeField] private GameObject _bossHitExplosionAnimPrefab;

    [SerializeField] private Transform target; // enemyTransform


    SpawnManager _spawnManager;


    // Use this for initialization
    void Start()
    {
        _spawnManager = GameObject.Find("SpawnManager").GetComponent<SpawnManager>();


        if (target != null) // but it IS NULL at start
        {
            target = GameObject.FindGameObjectWithTag("Enemy").transform;
            target = _spawnManager._enemyPrefab.transform;
        }
    }

    // Update is called once per frame
    void Update()
    {

        if (target == null)
        {
            transform.Translate(Vector3.up * _speed * Time.deltaTime);
        }




        if (target != null)
        {
            float step = _speed * Time.deltaTime; // calculate distance to move
            transform.position = Vector3.MoveTowards(transform.position, target.position, step);

            if (Vector3.Distance(transform.position, target.position) < 0.001f)
            {
                transform.position = Vector3.MoveTowards(transform.position, target.position, step);
            }
        }




        if (transform.position.y >= 9.70f || transform.position.y <= -9.70)
        {
            Destroy(this.gameObject);
        }
        if (transform.position.x >= 14.5f || transform.position.x <= -14.5)
        {
            Destroy(this.gameObject);
        }
    }

    private void LaserMovement()
    {
        transform.Translate(Vector3.up * _speed * Time.deltaTime);

        if (transform.position.y >= 8f)
        {
            Destroy(this.gameObject);
        }
        else if (transform.position.y >= 8f && transform.parent.gameObject != null)
        {
            Destroy(transform.parent.gameObject);
        }
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("1stBoss"))
        {
            Instantiate(_bossHitExplosionAnimPrefab, transform.position + new Vector3(0, 0.5f, 0), Quaternion.identity);
        }

        if (other.gameObject.CompareTag("BigEnemy"))
        {
            Instantiate(_bossHitExplosionAnimPrefab, transform.position + new Vector3(0, 0.5f, 0), Quaternion.identity);
        }
    }

}