using UnityEngine;
using UnityEngine.SceneManagement;

public static class BgmRuntimeBootstrap
{
    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
    private static void Bootstrap()
    {
        var mgr = BgmPlaybackManager.EnsureInstance();
        mgr.EnsurePlaying();

        // Ensure UI binder exists
        if (Object.FindAnyObjectByType<BgmUiBinder>() == null)
        {
            var go = new GameObject("BGM_UI_Binder");
            go.AddComponent<BgmUiBinder>();
            Object.DontDestroyOnLoad(go);
        }

        RemoveBgmParticlesInLoadedScenes();
        SceneManager.sceneLoaded -= OnSceneLoaded;
        SceneManager.sceneLoaded += OnSceneLoaded;
    }

    private static void OnSceneLoaded(Scene scene, LoadSceneMode mode)
    {
        RemoveBgmParticlesInLoadedScenes();
    }

    private static void RemoveBgmParticlesInLoadedScenes()
    {
        var emitters = Object.FindObjectsByType<BgmParticleEmitter>(FindObjectsInactive.Include, FindObjectsSortMode.None);
        for (int i = 0; i < emitters.Length; i++)
        {
            var e = emitters[i];
            if (e == null) continue;
            if (!e.gameObject.scene.IsValid() || !e.gameObject.scene.isLoaded) continue;
            Object.Destroy(e.gameObject);
        }

        var all = Resources.FindObjectsOfTypeAll<Transform>();
        for (int i = 0; i < all.Length; i++)
        {
            var t = all[i];
            if (t == null) continue;
            if (!t.gameObject.scene.IsValid() || !t.gameObject.scene.isLoaded) continue;
            if (t.name.Equals("BgmParticles", System.StringComparison.OrdinalIgnoreCase))
                Object.Destroy(t.gameObject);
        }
    }
}