using UnitTestSharp;
using Vellum;

namespace Ariadne.Vellum.UnitTests
{
    /// <summary>
    /// Saves an arc that ticks another arc it holds, while that arc is mid-wait.
    /// </summary>
    public class TickSelfSaveTests : TestFixture
    {
        public static SupervisorScript PausedWithAChild(Gates gates, int ticks)
        {
            var returnMe = new SupervisorScript();
            for (int i = 0; i < ticks; ++i)
            {
                returnMe.Tick(gates, TestTicks.Fresh());
            }

            return returnMe;
        }

        public class FromNodeTests : TestFixture
        {
            public void Reloaded_KeepsTickingTheChildFromWhereItWas()
            {
                SaveSession session = ArcConverterTests.Session();
                var gates = new Gates();
                SupervisorScript paused = PausedWithAChild(gates, ticks: 3);

                var loaded = (SupervisorScript)session.FromNode(
                    session.ToNode(paused, typeof(SupervisorScript)), typeof(SupervisorScript));
                loaded.Tick(gates, TestTicks.Fresh());

                CheckEqual(4, loaded.Child.Counted);
                CheckFalse(loaded.Finished);
            }

            public void Reloaded_FinishesWhenItsChildDoes()
            {
                SaveSession session = ArcConverterTests.Session();
                var gates = new Gates();
                SupervisorScript paused = PausedWithAChild(gates, ticks: 3);

                var loaded = (SupervisorScript)session.FromNode(
                    session.ToNode(paused, typeof(SupervisorScript)), typeof(SupervisorScript));
                gates.Open.Add("stop");
                loaded.Tick(gates, TestTicks.Fresh());

                CheckEqual("child counted 3", loaded.Result);
                CheckTrue(loaded.Child.Finished);
                CheckTrue(loaded.Finished);
            }

            public void Reloaded_LeavesTheOriginalAndItsChildAlone()
            {
                SaveSession session = ArcConverterTests.Session();
                var gates = new Gates();
                SupervisorScript paused = PausedWithAChild(gates, ticks: 3);

                var loaded = (SupervisorScript)session.FromNode(
                    session.ToNode(paused, typeof(SupervisorScript)), typeof(SupervisorScript));
                loaded.Tick(gates, TestTicks.Fresh());

                CheckEqual(3, paused.Child.Counted);
                CheckNotEqual(paused.Child, loaded.Child);
            }
        }
    }
}