using AssetRipper.SourceGenerated.Classes.ClassID_1;
using AssetRipper.SourceGenerated.Classes.ClassID_1001;
using AssetRipper.SourceGenerated.Classes.ClassID_18;
using AssetRipper.SourceGenerated.MarkerInterfaces;

namespace AssetRipper.SourceGenerated.Extensions
{
	public static class PrefabInstanceExtensions
	{
		public static string GetName(this IPrefabInstance prefab)
		{
			string? name = prefab.RootGameObjectP?.Name;
			return string.IsNullOrEmpty(name) ? prefab.ClassName : name;
		}

		public static IGameObject GetRootGameObject(this IPrefabInstance prefab)
		{
			return prefab.RootGameObjectP ?? throw new ArgumentException("Prefab has no root GameObject.", nameof(prefab));
		}

		/// <summary>
		/// Sets the <see cref="IPrefabInstance"/> as the internal prefab for all <see cref="IEditorExtension"/>s in the hierarchy.
		/// </summary>
		/// <remarks>
		/// Prior to 2018.3, Prefab was an actual asset inside "*.prefab" files.
		/// </remarks>
		/// <param name="prefab"></param>
		public static void SetPrefabInternal(this IPrefabInstance prefab)
		{
			if (prefab is IPrefabMarker prefabMarker)
			{
				foreach (IEditorExtension editorExtension in prefab.GetRootGameObject().FetchHierarchy())
				{
					editorExtension.PrefabInternal_C18P = prefabMarker;
				}
			}
		}
	}
}