using Explorer.Application;
using Explorer.Domain;

namespace Explorer.Application.Tests;

public class GitListingOverlayTests
{
    [Fact]
    public void Clean_tracked_file_is_blank()
    {
        var status = Status("1 .M N... 100644 100644 100644 a a src/App.cs");
        Assert.Equal("", GitListingOverlay.ForItem(@"C:\src\README.md", false, @"C:\src", status));
    }

    [Fact]
    public void File_shows_modified_unstaged_and_staged()
    {
        var status = Status("""
            1 .M N... 100644 100644 100644 a a src/App.cs
            1 M. N... 100644 100644 100644 b b README.md
            1 MM N... 100644 100644 100644 c c src/Both.cs
            ? notes.md
            """);
        Assert.Equal("Modified", GitListingOverlay.ForItem(@"C:\src\src\App.cs", false, @"C:\src", status));
        Assert.Equal("Staged", GitListingOverlay.ForItem(@"C:\src\README.md", false, @"C:\src", status));
        Assert.Equal("Staged · Modified", GitListingOverlay.ForItem(@"C:\src\src\Both.cs", false, @"C:\src", status));
        Assert.Equal("Untracked", GitListingOverlay.ForItem(@"C:\src\notes.md", false, @"C:\src", status));
    }

    [Fact]
    public void Folder_summarizes_dirty_children()
    {
        var status = Status("""
            1 .M N... 100644 100644 100644 a a src/App.cs
            ? bin/out.dll
            """);
        Assert.Equal("Modified", GitListingOverlay.ForItem(@"C:\src\src", true, @"C:\src", status));
        Assert.Equal("Untracked", GitListingOverlay.ForItem(@"C:\src\bin", true, @"C:\src", status));
        Assert.Equal("", GitListingOverlay.ForItem(@"C:\src\docs", true, @"C:\src", status));
    }

    [Fact]
    public void Nested_repo_uses_compact_badge()
    {
        var status = Status("1 .M N... 100644 100644 100644 a a App.cs");
        Assert.Equal("main · 1 modified", GitListingOverlay.ForNestedRepo(status));
    }

    [Fact]
    public void Outside_the_repo_is_blank()
    {
        var status = Status("1 .M N... 100644 100644 100644 a a App.cs");
        Assert.Equal("", GitListingOverlay.ForItem(@"D:\other\App.cs", false, @"C:\src", status));
    }

    private static GitStatus Status(string body)
        => GitPorcelainParser.Parse("# branch.head main\n" + body, @"C:\src")
           ?? throw new InvalidOperationException("parse");
}