using UnitTestSharp;

namespace Ariadne.Vellum.UnitTests
{
    public class ArcPartListTests : TestFixture
    {
        public class ScopeTests : TestFixture
        {
            public void ListsTheCallsLocalsInAListOfItsOwn()
            {
                var parts = new ArcPartList();
                parts.Local<int>("Run.count");
                parts.Scope("Run.first/", typeof(int)).Local<string>("Step.name");

                CheckEqual(new[] { "Run.count" }, parts.Keys);
                CheckEqual(new[] { "Run.first/" }, parts.ScopeNames);
                CheckEqual(new[] { "Step.name" }, parts.Scopes[0].Keys);
                CheckEqual(new[] { typeof(string) }, parts.Scopes[0].Types);
                CheckEqual(new[] { true }, parts.Scopes[0].IsLocal);
            }

            public void SameNameTwice_AddsToTheSameList()
            {
                var parts = new ArcPartList();
                parts.Scope("Run.first/").Local<int>("Step.count");
                parts.Scope("Run.first/").Local<string>("Step.name");

                CheckEqual(1, parts.Scopes.Count);
                CheckEqual(new[] { "Step.count", "Step.name" }, parts.Scopes[0].Keys);
            }

            public void DifferentNames_AreKeptApartInTheOrderNamed()
            {
                var parts = new ArcPartList();
                parts.Scope("Run.second/");
                parts.Scope("Run.first/");

                CheckEqual(new[] { "Run.second/", "Run.first/" }, parts.ScopeNames);
            }

            public void CallRunningTheFramesOfACallAbove_ReturnsNullAndHoldsThatCallsList()
            {
                var parts = new ArcPartList();
                IArcPartLister outer = parts.Scope("Run.first/", typeof(int), typeof(string));
                IArcPartLister repeat = outer.Scope("Again.wait/", typeof(int), typeof(string));

                CheckNull(repeat);
                CheckTrue(ReferenceEquals(parts.Scopes[0], parts.Scopes[0].Scopes[0]));
                CheckEqual(new[] { "Again.wait/" }, parts.Scopes[0].ScopeNames);
            }

            public void CallRunningFramesBeyondTheOnesAbove_IsAListOfItsOwn()
            {
                var parts = new ArcPartList();
                IArcPartLister outer = parts.Scope("Run.first/", typeof(int), typeof(string));
                IArcPartLister inner = outer.Scope("Again.wait/", typeof(int), typeof(long));

                CheckNotNull(inner);
                CheckFalse(ReferenceEquals(parts.Scopes[0], parts.Scopes[0].Scopes[0]));
            }

            public void CallRepeatingAnAncestorFurtherUp_ReturnsNull()
            {
                var parts = new ArcPartList();
                IArcPartLister outer = parts.Scope("Run.first/", typeof(int));
                IArcPartLister middle = outer.Scope("A.call/", typeof(string));

                CheckNull(middle.Scope("B.call/", typeof(int)));
                CheckTrue(ReferenceEquals(parts.Scopes[0], parts.Scopes[0].Scopes[0].Scopes[0]));
            }

            public void NamingARepeatAgain_ReturnsNullAgain()
            {
                var parts = new ArcPartList();
                IArcPartLister outer = parts.Scope("Run.first/", typeof(int));
                outer.Scope("Again.wait/", typeof(int));

                CheckNull(outer.Scope("Again.wait/", typeof(int)));
                CheckEqual(1, parts.Scopes[0].Scopes.Count);
            }

            public void CallInsideACall_IsAListInsideThatCallsList()
            {
                var parts = new ArcPartList();
                parts.Scope("Run.first/").Scope("Step.second/").Local<int>("Inner.count");

                CheckEqual(new[] { "Inner.count" }, parts.Scopes[0].Scopes[0].Keys);
            }
        }
    }
}