using Amphora;
using System.Collections.Generic;
using UnitTestSharp;

namespace Glass.UnitTests
{
    public class TypedPathTests : TestFixture
    {
        public class WalkTests : TestFixture
        {
            private static readonly InMemoryFileSystem NameRules = new InMemoryFileSystem();

            [IgnoreTest]
            private Status Walked(List<string> parts, string text)
            {
                return TypedPath.Walk(parts, text, character => character == '/' || character == '\\',
                    name => NameRules.ValidateFileName(name));
            }

            public void Name_IsAddedAsAPart()
            {
                var parts = new List<string> { "a" };

                CheckEqual(Status.Ok, Walked(parts, "b"));

                CheckEqual(new List<string> { "a", "b" }, parts);
            }

            public void SeveralNames_AreAddedInOrder()
            {
                var parts = new List<string>();

                Walked(parts, "x/y\\z");

                CheckEqual(new List<string> { "x", "y", "z" }, parts);
            }

            public void EmptyAndDotParts_ChangeNothing()
            {
                var parts = new List<string> { "a" };

                CheckEqual(Status.Ok, Walked(parts, "/././/"));

                CheckEqual(new List<string> { "a" }, parts);
            }

            public void DotDot_DropsTheLastPart()
            {
                var parts = new List<string> { "a", "b" };

                Walked(parts, "..");

                CheckEqual(new List<string> { "a" }, parts);
            }

            public void DotDot_WithNoParts_DoesNothing()
            {
                var parts = new List<string>();

                CheckEqual(Status.Ok, Walked(parts, "../.."));

                CheckEqual(0, parts.Count);
            }

            public void DotDot_AfterAName_DropsThatName()
            {
                var parts = new List<string>();

                Walked(parts, "a/../b");

                CheckEqual(new List<string> { "b" }, parts);
            }

            public void Empty_FailsAsBlank()
            {
                var parts = new List<string> { "a" };

                CheckEqual(NameRules.ValidateFileName(""), Walked(parts, ""));

                CheckEqual(new List<string> { "a" }, parts);
            }

            public void PartThatCantBeAName_GivesTheReasonAndKeepsTheEarlierParts()
            {
                var parts = new List<string> { "a" };
                string bad = "b" + (char)1;

                CheckEqual(NameRules.ValidateFileName(bad), Walked(parts, "ok/" + bad + "/never"));

                CheckEqual(new List<string> { "a", "ok" }, parts);
            }
        }
    }
}