using Scampz.GameJam.Assets.Scripts.Audio;
using UnityEngine;
using UnityEngine.SceneManagement;

namespace Scampz.GameJam.Assets.Scripts
{
  [RequireComponent(typeof(AudioSource))]
  public class BGMManager : MonoBehaviour
  {

    [SerializeField]
    private BGM _backgroundMusic;

    private static AudioSource _audioSource;

    private void Awake()
    {
      if (_audioSource == null)
      {
        _audioSource = new GameObject().AddComponent<AudioSource>();
        _audioSource.loop = true;
        DontDestroyOnLoad(_audioSource.gameObject);
      }

      if (_backgroundMusic == null)
      {
        Instantiate(_backgroundMusic);
        DontDestroyOnLoad(_backgroundMusic.gameObject);
      }
    }

    private void OnEnable()
    {
      SceneManager.activeSceneChanged += PlayNextSongIfAreaChange;
    }

    private void OnDisable()
    {
      SceneManager.activeSceneChanged -= PlayNextSongIfAreaChange;
    }

    private void PlayNextSongIfAreaChange(Scene oldScene, Scene newScene)
    {
      if (_audioSource.clip == null)
      {
        var newMusic = _backgroundMusic.GetClipFromSceneType(newScene);
        PlayBGM(newMusic);
        return;
      }

      Debug.Log($"Changed scenes to " + newScene.name);
      var newAudioClip = _backgroundMusic.GetClipFromSceneType(newScene);

      if (_audioSource.clip.name != newAudioClip.name)
      {
        PlayBGM(newAudioClip);
      }
      Debug.Log($"Playing BGM: " + _backgroundMusic.name);

    }

    public void PlayBGM(AudioClip audioClip)
    {
      if (_audioSource == null && _audioSource.clip == audioClip)
        return;

      _audioSource.Stop();
      _audioSource.clip = audioClip;
      _audioSource.Play();
    }
  }
}