using UnityEngine;

namespace HotUpdate.Gameplay
{
    /// <summary>Playback for the authored main-menu music prefab, independent of SFX.</summary>
    public sealed class MainMenuMusic : MonoBehaviour
    {
        public const string PrefabName = "MainMenuMusic";
        public const string PrefabFolder = "Assets/Bundles/Sound/Prefab";
        [SerializeField] AudioSource _source;
        bool _inMenu = true, _appPaused, _started, _began, _paused;

        public AudioSource Source => _source;

        void OnEnable()
        {
            PrototypeClientPrefs.AudioPreferencesChanged += ApplyPlayback;
            ApplyPlayback();
        }

        void Start()
        {
            _started = true;
            ApplyPlayback();
        }

        public void SetInMenu(bool inMenu)
        {
            _inMenu = inMenu;
            ApplyPlayback();
        }

        void ApplyPlayback()
        {
            if (!_started || _source == null) return;
            if (isActiveAndEnabled && _inMenu && !_appPaused && PrototypeClientPrefs.Music)
            {
                if (!_began)
                {
                    _source.Play();
                    _began = true;
                }
                else if (_paused) _source.UnPause();
                _paused = false;
            }
            else if (_began && !_paused)
            {
                _source.Pause();
                _paused = true;
            }
        }

        void OnApplicationPause(bool paused)
        {
            _appPaused = paused;
            ApplyPlayback();
        }

        void OnDisable()
        {
            PrototypeClientPrefs.AudioPreferencesChanged -= ApplyPlayback;
            if (_source != null && _began && !_paused)
            {
                _source.Pause();
                _paused = true;
            }
        }
    }
}