using Explorer.Domain;

namespace Explorer.Domain.Tests;

public class NameNormalizerTests
{
    [Fact]
    public void Normalize_folds_case_and_keeps_unicode()
    {
        Assert.Equal("straße", NameNormalizer.Normalize("Straße"));
        Assert.Equal("abc", NameNormalizer.Normalize("ABC"));
    }

    [Fact]
    public void Extension_skips_leading_dot_names()
    {
        Assert.Equal("mkv", NameNormalizer.Extension("film.mkv"));
        Assert.Null(NameNormalizer.Extension(".gitignore"));
        Assert.Null(NameNormalizer.Extension("Makefile"));
    }
}

public class PathRulesTests
{
    [Fact]
    public void Extended_roundtrip_local_and_unc()
    {
        Assert.Equal(@"\\?\C:\Temp", PathRules.ToExtended(@"C:\Temp"));
        Assert.Equal(@"\\?\UNC\server\share", PathRules.ToExtended(@"\\server\share"));
        Assert.Equal(@"C:\Temp", PathRules.FromExtended(@"\\?\C:\Temp"));
        Assert.Equal(@"\\server\share", PathRules.FromExtended(@"\\?\UNC\server\share"));
    }

    [Fact]
    public void Canonical_unc_lowercases_server()
    {
        Assert.Equal(@"\\media\Movies", PathRules.CanonicalUncRoot(@"\\Media\Movies\Action"));
    }

    [Fact]
    public void Relative_and_parent()
    {
        Assert.Equal(@"Windows\System32", PathRules.MakeRelative(@"C:\", @"C:\Windows\System32"));
        Assert.Equal(@"C:\Windows", PathRules.Parent(@"C:\Windows\System32"));
        Assert.Equal(@"C:\", PathRules.Parent(@"C:\Windows"));
    }

    [Fact]
    public void Join_display_combines_root_and_relative()
    {
        Assert.Equal(@"C:\Users\Docs", PathRules.JoinDisplay(@"C:\Users", "Docs"));
        Assert.Equal(@"C:\", PathRules.JoinDisplay(@"C:\", ""));
        Assert.Equal("Docs", PathRules.JoinDisplay(null, "Docs"));
    }

    [Fact]
    public void Shorten_keeps_root_and_leaf()
    {
        Assert.Equal(@"C:\Temp", PathRules.ShortenDisplay(@"C:\Temp"));
        Assert.Equal(@"C:\Users\…\Documents\Budget", PathRules.ShortenDisplay(@"C:\Users\Dominique\Documents\Budget", 28));
        Assert.Equal(@"\\media\movies\…\Action\Dune", PathRules.ShortenDisplay(@"\\media\movies\New\Action\Dune", 28));
    }
}

public class VolumeIdentityTests
{
    [Fact]
    public void Matches_volume_guid_across_drive_letters()
    {
        var known = new List<Source>
        {
            new()
            {
                Id = 1,
                StableKey = "a",
                DisplayName = "SanDisk Ultra 64 GB",
                VolumeGuid = @"\\?\Volume{abc}\",
                LastRootPath = @"E:\",
                Kind = SourceKind.Removable
            }
        };
        var fp = new VolumeFingerprint
        {
            Kind = SourceKind.Removable,
            VolumeGuid = @"\\?\Volume{abc}\",
            RootPath = @"G:\",
            DisplayName = "SanDisk"
        };
        var match = VolumeIdentityMatcher.Match(fp, known);
        Assert.NotNull(match.Source);
        Assert.Equal(1, match.Source!.Id);
        Assert.Equal(VolumeIdentityMatcher.MatchStrength.Guid, match.Strength);
        Assert.False(match.Ambiguous);
    }

    [Fact]
    public void Matches_unc_share()
    {
        var known = new List<Source>
        {
            new()
            {
                Id = 7,
                StableKey = "s",
                DisplayName = @"\\media\movies",
                Kind = SourceKind.Smb,
                LastRootPath = @"\\Media\Movies"
            }
        };
        var fp = new VolumeFingerprint { Kind = SourceKind.Smb, RootPath = @"\\media\movies", DisplayName = "x" };
        Assert.Equal(7, VolumeIdentityMatcher.Match(fp, known).Source?.Id);
    }
}

public class ExcludeEvaluatorTests
{
    [Fact]
    public void Excludes_path_glob_and_extension()
    {
        var ev = new ExcludeEvaluator(
        [
            new() { Kind = ExcludeKind.PathPrefix, Pattern = @"C:\Windows" },
            new() { Kind = ExcludeKind.Glob, Pattern = "node_modules" },
            new() { Kind = ExcludeKind.Extension, Pattern = "tmp" }
        ], skipHidden: false, skipSystem: false);

        Assert.True(ev.ShouldExclude(@"C:\Windows\System32", "System32", true, 0, null));
        Assert.True(ev.ShouldExclude(@"D:\proj\node_modules", "node_modules", true, 0, null));
        Assert.True(ev.ShouldExclude(@"D:\a.tmp", "a.tmp", false, 0, null));
        Assert.False(ev.ShouldExclude(@"D:\a.txt", "a.txt", false, 0, null));
    }

    [Fact]
    public void Hidden_policy()
    {
        var ev = new ExcludeEvaluator([], skipHidden: true, skipSystem: true);
        Assert.True(ev.ShouldExclude(@"C:\x", "x", false, AttributeFlags.Hidden, null));
    }
}

public class ReparsePolicyTests
{
    [Fact]
    public void Does_not_recurse_reparse_directories()
    {
        var item = new FileSystemItem
        {
            FullPath = @"C:\link",
            Name = "link",
            IsDirectory = true,
            Attributes = AttributeFlags.Directory | AttributeFlags.ReparsePoint,
            ReparseTag = ReparsePolicy.IoReparseTagSymlink
        };
        Assert.False(ReparsePolicy.ShouldRecurseIntoDirectory(item));
    }
}