using System.Text.RegularExpressions;
using Omika.App.Navigation;
using Omika.Core.Observability;

namespace Omika.Tests.Observability;

/// <summary>
/// T18 (§71/§72) : le mapping AppPage → ScreenCode est total, stable, au format
/// UPPER_SNAKE_CASE ASCII, sans identifiant métier, sans nom technique de Page/ViewModel.
/// </summary>
public partial class DiagnosticScreenMappingTests
{
    [Fact]
    public void Resolve_EveryAppPage_HasScreenCode()
    {
        foreach (AppPage page in Enum.GetValues<AppPage>())
        {
            Assert.True(
                DiagnosticScreenMapping.Resolve(page) is not null,
                $"AppPage.{page} n'a pas de ScreenCode : le mapping doit être TOTAL sur l'énumération.");
        }
    }

    [Fact]
    public void Resolve_ProducesCatalogValues()
    {
        var catalog = new HashSet<string>(DiagnosticScreenCodes.All, StringComparer.Ordinal);

        foreach (AppPage page in Enum.GetValues<AppPage>())
        {
            string code = DiagnosticScreenMapping.Resolve(page)!;
            Assert.Contains(code, catalog);
        }
    }

    [Fact]
    public void Resolve_Agenda_ReturnsAgenda()
    {
        Assert.Equal(DiagnosticScreenCodes.Agenda, DiagnosticScreenMapping.Resolve(AppPage.Home));
    }

    [Fact]
    public void Resolve_SiteDetail_ReturnsSiteDetail()
    {
        Assert.Equal(DiagnosticScreenCodes.SiteDetail, DiagnosticScreenMapping.Resolve(AppPage.SiteDetail));
    }

    [Fact]
    public void Resolve_InterventionSearch_ReturnsInterventionSearch()
    {
        Assert.Equal(DiagnosticScreenCodes.InterventionSearch, DiagnosticScreenMapping.Resolve(AppPage.Interventions));
    }

    [Fact]
    public void ScreenCodes_AreUppercaseSnakeCaseAscii_WithoutIds()
    {
        var regex = UppercaseSnake();

        foreach (string code in DiagnosticScreenCodes.All)
        {
            Assert.Matches(regex, code);
            // §72 : aucun ID métier dynamique (site/rendez-vous/intervention/user/GUID).
            Assert.DoesNotContain('-', code);      // pas de GUID
            Assert.DoesNotContain(code, char.IsDigit); // pas de numéro d'ID
            Assert.DoesNotContain(code, char.IsLower); // pas de casse libre
        }
    }

    [GeneratedRegex("^[A-Z][A-Z0-9_]*$")]
    private static partial Regex UppercaseSnake();
}