namespace Sunless.Architecture;

public readonly record struct ArchFoundationMouthRequest( object Payload, ArchKit Kit, float Reach );

public interface IArchFoundationMouth {
	ArchKind Kind { get; }

	IReadOnlyList<Vector2> Open( ArchFoundationMouthRequest request );
}

public sealed class ArchFoundationMouths : ArchTable<ArchFoundationMouths, ArchKind, IArchFoundationMouth> {
	protected override IEnumerable<IArchFoundationMouth> Standing() {
		yield return new ArchApproachFoundationMouth();
	}

	protected override ArchKind KeyOf( IArchFoundationMouth mouth ) => mouth.Kind;

	protected override bool Accepts( IArchFoundationMouth mouth ) => mouth.Kind.Known;

	protected override string Collision( IArchFoundationMouth standing, IArchFoundationMouth mouth ) {
		return $"{mouth.Kind.Ident} foundation mouth is claimed by both {standing.GetType().Name} and {mouth.GetType().Name}";
	}

	public IArchFoundationMouth For( ArchKind kind ) => Held( kind );

	public IReadOnlyList<Vector2> Open( ArchKind kind, ArchFoundationMouthRequest request ) {
		return For( kind )?.Open( request ) ?? Array.Empty<Vector2>();
	}
}