using Omika.Diagnostics.Referential;
using Omika.Diagnostics.Tests.Fakes;

namespace Omika.Diagnostics.Tests;

/// <summary>
/// T24-A Partie B — référentiel administrable : normalisation TRIM+UPPER, unicité
/// (type, code), code immuable, archivage sans DELETE, libellés et codes non référencés.
/// S'appuie sur le <see cref="FakeDiagnosticReferenceRepository"/> (même contrat que le
/// repository Npgsql).
/// </summary>
public class DiagnosticReferenceTests
{
    private static DiagnosticReferenceRecord Ref(
        long id,
        string type,
        string code,
        string label,
        bool enabled = true,
        int sortOrder = 0) => new()
    {
        Id = id,
        ReferenceType = type,
        Code = code,
        Label = label,
        Enabled = enabled,
        SortOrder = sortOrder,
        CreatedAtUtc = DateTimeOffset.UtcNow,
        UpdatedAtUtc = DateTimeOffset.UtcNow
    };

    // ------------------------------------------- normalisation ----
    [Theory]
    [InlineData("agenda", "AGENDA")]
    [InlineData("  agenda  ", "AGENDA")]
    [InlineData("Facture_Detail", "FACTURE_DETAIL")]
    [InlineData(null, null)]
    [InlineData("", null)]
    [InlineData("   ", null)]
    public void NormalizeCode_TrimsAndUppers(string? input, string? expected)
    {
        Assert.Equal(expected, DiagnosticReferenceNormalization.NormalizeCode(input));
    }

    // ------------------------------------------- création + normalisation ----
    [Fact]
    public async Task Create_NormalizesCodeAndLabel()
    {
        var repo = new FakeDiagnosticReferenceRepository();

        DiagnosticReferenceRecord? created = await repo.CreateAsync(
            DiagnosticReferenceTypes.ScreenCode, "  facture_detail  ", "  Détail de facture  ", null, true, 0);

        Assert.NotNull(created);
        Assert.Equal("FACTURE_DETAIL", created!.Code);
        Assert.Equal("Détail de facture", created.Label);
    }

    // ------------------------------------------- unicité (type, code) ----
    [Fact]
    public async Task Create_DuplicateTypeCode_CaseInsensitive_ReturnsNull()
    {
        var repo = new FakeDiagnosticReferenceRepository();
        repo.Seed(Ref(1, DiagnosticReferenceTypes.ScreenCode, "AGENDA", "Agenda"));

        DiagnosticReferenceRecord? duplicate = await repo.CreateAsync(
            DiagnosticReferenceTypes.ScreenCode, "agenda", "Agenda bis", null, true, 0);

        Assert.Null(duplicate);
        Assert.Single(await repo.ListAsync());
    }

    [Fact]
    public async Task Create_SameCodeDifferentType_IsAllowed()
    {
        var repo = new FakeDiagnosticReferenceRepository();
        repo.Seed(Ref(1, DiagnosticReferenceTypes.ScreenCode, "AGENDA", "Agenda"));

        // Même code mais type différent → autorisé (unicité = type + code).
        DiagnosticReferenceRecord? feature = await repo.CreateAsync(
            DiagnosticReferenceTypes.FeatureCode, "agenda", "Agenda (fonctionnalité)", null, true, 0);

        Assert.NotNull(feature);
        Assert.Equal(2, (await repo.ListAsync()).Count);
    }

    // ------------------------------------------- type invalide ----
    [Fact]
    public async Task Create_UnsupportedType_ReturnsNull()
    {
        var repo = new FakeDiagnosticReferenceRepository();

        DiagnosticReferenceRecord? created = await repo.CreateAsync(
            "EVENT_CODE", "X", "Libellé", null, true, 0);

        Assert.Null(created);
    }

    // ------------------------------------------- code immuable ----
    [Fact]
    public async Task Update_ChangesLabelAndState_ButNeverCode()
    {
        var repo = new FakeDiagnosticReferenceRepository();
        repo.Seed(Ref(1, DiagnosticReferenceTypes.ScreenCode, "AGENDA", "Agenda"));

        bool updated = await repo.UpdateAsync(1, "Nouvel Agenda", "Description", false, 7);

        Assert.True(updated);
        DiagnosticReferenceRecord? record = await repo.GetByIdAsync(1);
        Assert.NotNull(record);
        Assert.Equal("AGENDA", record!.Code); // code immuable.
        Assert.Equal("Nouvel Agenda", record.Label);
        Assert.False(record.Enabled);
        Assert.Equal(7, record.SortOrder);
    }

    // ------------------------------------------- archivage sans DELETE ----
    [Fact]
    public async Task Archive_DisablesWithoutDelete()
    {
        var repo = new FakeDiagnosticReferenceRepository();
        repo.Seed(Ref(1, DiagnosticReferenceTypes.ScreenCode, "AGENDA", "Agenda"));

        bool updated = await repo.UpdateAsync(1, "Agenda", null, enabled: false, sortOrder: 0);

        Assert.True(updated);
        Assert.False((await repo.GetByIdAsync(1))!.Enabled);
        // Aucun DELETE : l'entrée reste listée (état Archivé affiché, jamais masqué).
        Assert.Single(await repo.ListAsync());
    }

    // ------------------------------------------- libellés dropdown ----
    [Fact]
    public async Task GetLabels_ReturnsCodeToLabelIncludingArchived()
    {
        var repo = new FakeDiagnosticReferenceRepository();
        repo.Seed(
            Ref(1, DiagnosticReferenceTypes.ScreenCode, "AGENDA", "Agenda"),
            Ref(2, DiagnosticReferenceTypes.ScreenCode, "SITE_LIST", "Sites", enabled: false),
            Ref(3, DiagnosticReferenceTypes.FeatureCode, "EMAIL_SEND", "Envoi de courriel"));

        IReadOnlyDictionary<string, string> labels = await repo.GetLabelsAsync(DiagnosticReferenceTypes.ScreenCode);

        Assert.Equal("Agenda", labels["AGENDA"]);
        Assert.Equal("Sites", labels["SITE_LIST"]); // archivé inclus (libellé historique utile).
        Assert.False(labels.ContainsKey("EMAIL_SEND"));
    }

    // ------------------------------------------- codes non référencés ----
    [Fact]
    public async Task GetUnreferenced_ReturnsObservedWithoutReference()
    {
        var repo = new FakeDiagnosticReferenceRepository();
        repo.Seed(Ref(1, DiagnosticReferenceTypes.ScreenCode, "AGENDA", "Agenda"));
        DateTimeOffset last = DateTimeOffset.UtcNow.AddDays(-1);

        repo.SeedObserved(DiagnosticReferenceTypes.ScreenCode, "AGENDA", 40, last);          // référencé → exclu.
        repo.SeedObserved(DiagnosticReferenceTypes.ScreenCode, "FACTURE_DETAIL", 128, last); // non référencé.
        repo.SeedObserved(DiagnosticReferenceTypes.FeatureCode, "FACTURE_EXPORT_PDF", 12, last);

        IReadOnlyList<DiagnosticUnreferencedCode> unreferenced = await repo.GetUnreferencedAsync(100);

        Assert.Equal(2, unreferenced.Count);
        Assert.Contains(unreferenced, u => u.ReferenceType == DiagnosticReferenceTypes.ScreenCode && u.Code == "FACTURE_DETAIL");
        Assert.Contains(unreferenced, u => u.ReferenceType == DiagnosticReferenceTypes.FeatureCode && u.Code == "FACTURE_EXPORT_PDF");
        Assert.DoesNotContain(unreferenced, u => u.Code == "AGENDA");
    }
}