using DeepDrftPublic.Seo;

namespace DeepDrftTests;

/// <summary>
/// Unit tests for <see cref="RobotsTxt"/> — the pure environment-branch composition of the robots.txt body
/// (Phase 23 wave 23.1). The gate (Production vs. anything-else) is the load-bearing branch: Production
/// allows + points at the sitemap and disallows the non-page routes; every non-production environment is a
/// closed door with no sitemap pointer (Invariant E1).
/// </summary>
[TestFixture]
public class RobotsTxtTests
{
    private const string BaseUrl = "https://deepdrft.com";

    [Test]
    public void Build_Production_AllowsAndPointsAtSitemap()
    {
        var body = RobotsTxt.Build(isProduction: true, BaseUrl);

        Assert.Multiple(() =>
        {
            Assert.That(body, Does.Contain("User-agent: *"));
            Assert.That(body, Does.Contain("Allow: /"));
            Assert.That(body, Does.Contain("Sitemap: https://deepdrft.com/sitemap.xml"));
        });
    }

    [Test]
    public void Build_Production_DisallowsFramePlayerAndApi()
    {
        var body = RobotsTxt.Build(isProduction: true, BaseUrl);

        Assert.Multiple(() =>
        {
            Assert.That(body, Does.Contain("Disallow: /FramePlayer"));
            Assert.That(body, Does.Contain("Disallow: /api/"));
        });
    }

    [Test]
    public void Build_NonProduction_DisallowsEverythingWithNoSitemapPointer()
    {
        var body = RobotsTxt.Build(isProduction: false, BaseUrl);

        Assert.Multiple(() =>
        {
            Assert.That(body, Does.Contain("User-agent: *"));
            Assert.That(body, Does.Contain("Disallow: /"));
            Assert.That(body, Does.Not.Contain("Allow:"));
            Assert.That(body, Does.Not.Contain("Sitemap:"));
        });
    }

    [Test]
    public void Build_Production_TrimsTrailingSlashOnBaseUrl()
    {
        var body = RobotsTxt.Build(isProduction: true, "https://deepdrft.com/");

        Assert.That(body, Does.Contain("Sitemap: https://deepdrft.com/sitemap.xml"));
    }
}