using Cysharp.Threading.Tasks;
using UnityEngine;

namespace BrewMonster.Scripts
{
    /// <summary>
    /// Lives on the persistent "Music" GameObject alongside AudioManager.
    /// Waits for the host player to be ready (mirroring TemporaryBackgroundMusic),
    /// then loads BGM + ambience clips via Addressables and plays them through AudioManager.
    /// </summary>
    public class WorldMusicController : MonoBehaviour
    {
        public static WorldMusicController Instance;

        [SerializeField] private WorldMusicDatabaseSO _worldMusicDB;

        void Awake()
        {
            if (Instance == null)
            {
                Instance = this;
                DontDestroyOnLoad(gameObject);
            }
            else
            {
                Destroy(this);
            }
        }

        /// <summary>
        /// Called from LoginScreenUI when the player selects a character.
        /// Kicks off the async setup without blocking the caller.
        /// </summary>
        public void InitForWorld(int worldTag)
        {
            AudioManager.Instance.StopBGM(1f);
            SetupAudioSources(worldTag).Forget();
        }

        private async UniTask SetupAudioSources(int worldTag)
        {
            var hostPlayer = CECGameRun.Instance?.GetHostPlayer();
            while (hostPlayer == null)
            {
                await UniTask.DelayFrame(1);
                hostPlayer = CECGameRun.Instance?.GetHostPlayer();
            }

            var entry = _worldMusicDB?.Lookup(worldTag);
            if (entry == null)
            {
                Debug.LogWarning($"[WorldMusicController] No music entry found for worldTag {worldTag}");
                return;
            }
            var bgmClip      = await AddressableManager.Instance.LoadAudioClipAsync(entry.bgmPath.ToLower());
            var ambienceClip = await AddressableManager.Instance.LoadAudioClipAsync(entry.ambiencePath.ToLower());

            AudioManager.Instance.PlayWorldMusic(bgmClip, ambienceClip, 2f);
        }
    }
}