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

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

using UnityEngine;
using Utility;

public class Zombie : MonoBehaviour
{
    [SerializeField]
    List<AudioClip> Noises;
    [SerializeField]
    public float speed = 5f;
    [SerializeField]
    private float _noiseDelay = 5.0f;
    [SerializeField, ShowOnly]
    private float _noiseTimer;

    private Rigidbody _rb;
    private AudioSource _audioSource;
    private bool _fadeOutNoise = false;

    void Start()
    {
        _rb = GetComponent<Rigidbody>();
        _noiseTimer = Random.Range(0.3f * _noiseDelay, 1.5f * _noiseDelay);
        _audioSource = GetComponent<AudioSource>();
    }

    void Update()
    {
        UpdateNoise();
        MoveTowardsPlayer();
    }

    private void MoveTowardsPlayer()
    {
        Vector3 direction = (GameManager.Instance.Player.transform.position - transform.position).normalized;
        _rb.MovePosition(_rb.position + direction * speed * Time.deltaTime);
    }

    private void UpdateNoise()
    {
        if (!_fadeOutNoise)
        {
            _noiseTimer -= Time.deltaTime;

            if (_noiseTimer < 0)
            {
                _noiseTimer = _noiseDelay;
                PlayRandomNoise();
            }
        }
        else
        {
            _audioSource.volume -= _audioSource.volume * Time.deltaTime;
        }
    }

    private void PlayRandomNoise()
    {
        if (!_audioSource.isPlaying)
        {
            _audioSource.clip = Noises[Random.Range(0, Noises.Count)];
            _audioSource.Play();
        }
    }

    public void FadeOutNoise()
    {
        _fadeOutNoise = true;
    }
}