using System;

namespace Ariadne.Vellum.UnitTests
{
    /// <summary>
    /// Offers a passage that pauses until a gate it is given opens, counting the frames it waited in a local.
    /// </summary>
    public partial class GatedPlantScript : Arc<Gates>
    {
        public int Total;

        public int Measure(Gates gates, string gate, int amount)
        {
            int waited = 0;

        wait:
            while (!gates.Open.Contains(gate))
            {
                waited++;
                Yield();
            }

            Total += amount + waited;
            return Total;
        }

        protected override void Run(Gates gates)
        {
        }
    }

    /// <summary>
    /// Adds what two passages of two arcs hand back to a local, in one statement.
    /// </summary>
    public partial class GatedSumOperatorScript : Arc<Gates>
    {
        public GatedPlantScript First;

        public GatedPlantScript Second;

        public string Result;

        protected override void Run(Gates gates)
        {
            int before = 100;

        sum:
            Result = "sum " + (before + First.Measure(gates, "a", 5) + Second.Measure(gates, "b", 7));
        }
    }

    /// <summary>
    /// Offers a passage that pauses until its gate opens, then hands back a span.
    /// </summary>
    public partial class DelayPlantScript : Arc<Gates>
    {
        public TimeSpan Ask(Gates gates)
        {
        ask:
            while (!gates.Open.Contains("answer"))
            {
                Yield();
            }

            return TimeSpan.FromSeconds(2);
        }

        protected override void Run(Gates gates)
        {
        }
    }

    /// <summary>
    /// Waits for as long as a passage of another arc says.
    /// </summary>
    public partial class AskWaitOperatorScript : Arc<Gates>
    {
        public DelayPlantScript Delay;

        public string Result;

        protected override void Run(Gates gates)
        {
        first:
            Wait(Delay.Ask(gates));
            Result = "done";
        }
    }
}