using HC3.UI;

namespace HC3
{
	public abstract class PinnableWindow<T> : Window where T : PinnableWindow<T>, new()
	{
		[SkipHotload]
		public static List<T> Instances { get; private set; } = new();

		public override bool IsPinnable => true;

		public static T Show()
		{
			// Remove all unpinned instances
			foreach ( var w in Instances.ToList() )
			{
				if ( !w.Pinned )
				{
					WindowManager.Instance.Close( w );
					Instances.Remove( w );
				}
			}

			// Create and register a new one
			var instance = new T();
			Instances.Add( instance );
			WindowManager.Instance.Open( instance );

			return instance;
		}

		public override void OnClose()
		{
			base.OnClose();
			Instances.Remove( this as T );
		}
	}
}