namespace Ariadne.Vellum.UnitTests
{
    /// <summary>
    /// Has a virtual passage that other arcs call.
    /// </summary>
    public partial class Door : Arc<Gates>
    {
        public string Note = "closed";

        public virtual void Swing(Gates gates)
        {
            int hinges = 2;

        swing:
            while (!gates.Open.Contains("swing"))
            {
                Yield();
            }

            Note = "swung " + hinges;
        }

        protected override void Run(Gates gates)
        {
        first:
            Swing(gates);
        }
    }

    /// <summary>
    /// Overrides the passage with locals of its own.
    /// </summary>
    public partial class CreakyDoor : Door
    {
        public override void Swing(Gates gates)
        {
            string sound = "creak";

        creak:
            while (!gates.Open.Contains("swing"))
            {
                Yield();
            }

            Note = sound;
        }
    }

    /// <summary>
    /// Calls a virtual passage on a door, which is a door or a derived one.
    /// </summary>
    public partial class Visitor : Arc<Gates>
    {
        public Door Entrance;

        public string Result = "";

        protected override void Run(Gates gates)
        {
        enter:
            Entrance.Swing(gates);
            Result = Entrance.Note;
        }
    }
}