using Microsoft.Extensions.Options;
using Novelly.Api.Imports;

namespace Novelly.Api.Tests;

[TestFixture]
public class ImportBrowseServiceTests
{
    private string _root = null!;
    private ImportBrowseService _browse = null!;

    [SetUp]
    public void SetUp()
    {
        _root = Directory.CreateTempSubdirectory("novelly-browse-test-").FullName;
        _browse = new ImportBrowseService(
            Options.Create(new ImportOptions { RootPath = _root }),
            new CapturingLogger<ImportBrowseService>());
    }

    [TearDown]
    public void TearDown()
    {
        if (Directory.Exists(_root))
        {
            Directory.Delete(_root, recursive: true);
        }
    }

    [Test]
    public void Listing_the_root_returns_directories_before_files_ordered_by_name()
    {
        File.WriteAllText(Path.Combine(_root, "notes.md"), "# Notes");
        Directory.CreateDirectory(Path.Combine(_root, "zeta"));
        Directory.CreateDirectory(Path.Combine(_root, "alpha"));

        var listing = _browse.List(null);

        Assert.That(listing.Entries.Select(e => e.Name), Is.EqualTo(new[] { "alpha", "zeta", "notes.md" }));
    }

    [Test]
    public void A_folder_with_an_outline_file_is_flagged_importable()
    {
        var folder = Path.Combine(_root, "my-novel");
        Directory.CreateDirectory(folder);
        File.WriteAllText(Path.Combine(folder, "outline.md"), "# My Novel");

        var listing = _browse.List(null);

        Assert.That(listing.Entries.Single(e => e.Name == "my-novel").LooksImportable, Is.True);
    }

    [Test]
    public void An_empty_folder_is_not_flagged_importable()
    {
        Directory.CreateDirectory(Path.Combine(_root, "empty"));

        var listing = _browse.List(null);

        Assert.That(listing.Entries.Single(e => e.Name == "empty").LooksImportable, Is.False);
    }

    [Test]
    public void The_staging_folder_is_hidden_from_listings()
    {
        Directory.CreateDirectory(Path.Combine(_root, ".novelly-staging"));
        Directory.CreateDirectory(Path.Combine(_root, "visible"));

        var listing = _browse.List(null);

        Assert.That(listing.Entries.Select(e => e.Name), Is.EqualTo(new[] { "visible" }));
    }

    [Test]
    public void Escaping_the_import_root_is_rejected()
    {
        Assert.That(() => _browse.List(".."), Throws.TypeOf<ArgumentException>());
    }

    [Test]
    public void Browsing_without_a_configured_root_fails()
    {
        var unconfigured = new ImportBrowseService(
            Options.Create(new ImportOptions()),
            new CapturingLogger<ImportBrowseService>());

        Assert.That(() => unconfigured.List(null), Throws.TypeOf<InvalidOperationException>());
    }

    [Test]
    public void Listing_a_subfolder_reports_its_parent()
    {
        Directory.CreateDirectory(Path.Combine(_root, "child"));

        var listing = _browse.List("child");

        Assert.That(listing.ParentRelativePath, Is.EqualTo(""));
    }
}