#if UNITY_ANDROID && !UNITY_EDITOR
using UnityEngine;

public static class AndroidEntryChecker
{
    public enum UnityEntryType
    {
        Unknown,
        Activity,
        GameActivity
    }

    private static UnityEntryType? _cachedType;

    public static UnityEntryType GetEntryType()
    {
        if (_cachedType.HasValue)
            return _cachedType.Value;

        using (var unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
        using (var activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity"))
        {
            string className = activity.Call<AndroidJavaObject>("getClass")
                                       .Call<string>("getName");

            if (className.Contains("UnityPlayerGameActivity"))
                _cachedType = UnityEntryType.GameActivity;
            else if (className.Contains("UnityPlayerActivity"))
                _cachedType = UnityEntryType.Activity;
            else
                _cachedType = UnityEntryType.Unknown;

            Debug.Log($"[EntryChecker] Running under: {_cachedType} ({className})");
            return _cachedType.Value;
        }

        return UnityEntryType.Unknown;
    }
    
    /// <summary>
    /// Determines if AppCompat-based SDKs can run safely.
    /// </summary>
    private static bool CanUseAppCompat()
    {
        var type = GetEntryType();

        if (type == UnityEntryType.GameActivity)
        {
            Debug.LogWarning("[Unity6SafeEntry] AppCompat SDKs may not work under GameActivity. " +
                             "Consider switching Application Entry to Activity in Player Settings.");
            return false;
        }

        return true; // Safe under Activity
    }

    /// <summary>
    /// Fallback safe initialization: disable AppCompat-only SDKs if running under GameActivity.
    /// </summary>
    public static void InitializeWithFallback(System.Action safeInit, System.Action appCompatInit = null)
    {
        if (CanUseAppCompat())
        {
            appCompatInit?.Invoke();
            Debug.Log("[Unity6SafeEntry] Initialized AppCompat SDKs under Activity.");
        }
        else
        {
            safeInit?.Invoke();
            Debug.Log("[Unity6SafeEntry] Falling back to safe init (GameActivity mode).");
        }
    }
}
#endif