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

public class CharacterSpawner : MonoBehaviour
{
    [SerializeField]
    private GameObject _prefab;

    [SerializeField]
    private int _maxCharacters=1;

    [SerializeField]
    private Transform _spawnPoint;

    private int _respawnTimeout = 4;
    private float _respawnElementTimer;

    private List<Character> _characters;

    // Start is called before the first frame update
    private void Start()
    {
        if(_spawnPoint==null)
        {
            _spawnPoint=gameObject.transform;
        }
        _characters=new List<Character>();
    }

    // Update is called once per frame
    private void Update()
    {
         if(_characters.Count<_maxCharacters)
        {
            _respawnElementTimer -= Time.deltaTime;
            if (_respawnElementTimer <= 0)
            {
                _respawnElementTimer = _respawnTimeout;
                var prefab= Instantiate(_prefab, _spawnPoint.position, _spawnPoint.rotation);
                var character=prefab.GetComponent<Character>();
                character.OnCharacterDeath+=OnCharacterDeath;
                
                _characters.Add(character);
            }
            return;
        }
    }

    private void OnCharacterDeath(object sender, EventArgs e)
    {
        var character=(sender as Character);
        character.OnCharacterDeath-=OnCharacterDeath;
        _characters.Remove(character);
        Destroy(character.gameObject);
    }
}