namespace Acl.Application;

/// <summary>The ACL's single operation: open a zaak from a domain payload,
/// default-filling the ZGW-mandatory fields (ADR-0003).</summary>
public sealed class AclService(IZaakGateway gateway, AclDefaults defaults, IZaaktypeCatalog catalog, IClock clock)
{
    public async Task<Uri> OpenZaakAsync(DomainRegistration registration, CancellationToken ct = default)
    {
        ArgumentNullException.ThrowIfNull(registration);

        var request = new ZaakRequest(
            defaults.Bronorganisatie,
            defaults.VerantwoordelijkeOrganisatie,
            defaults.Vertrouwelijkheidaanduiding,
            await catalog.GetZaaktypeUrlAsync(ct),
            clock.Today,
            registration.Reference);

        return await gateway.OpenZaakAsync(request, ct);
    }

    /// <summary>
    /// Approve a zaak: set it to the eindstatus of the BIG zaaktype (resolved by identificatie, S-27).
    /// The domain hands over only the zaak URL; the ACL owns which statustype means "approved" (§8.1).
    /// </summary>
    public async Task ApproveZaakAsync(Uri zaakUrl, CancellationToken ct = default)
    {
        ArgumentNullException.ThrowIfNull(zaakUrl);

        await gateway.SetZaakToEindstatusAsync(zaakUrl, await catalog.GetZaaktypeUrlAsync(ct), clock.Today, ct);
    }

    /// <summary>
    /// Cancel a zaak on document-timeout expiry (S-10c): set it to the BIG zaaktype's cancellation
    /// statustype + resultaat. The domain hands over only the zaak URL; the ACL owns which
    /// statustype/resultaat means "cancelled" (§8.1).
    /// </summary>
    public async Task CancelZaakAsync(Uri zaakUrl, CancellationToken ct = default)
    {
        ArgumentNullException.ThrowIfNull(zaakUrl);

        await gateway.SetZaakToCancellationStatusAsync(zaakUrl, await catalog.GetZaaktypeUrlAsync(ct), clock.Today, ct);
    }

    /// <summary>The published zaaktypen, for the beheer catalogus viewer (S-15a). Read-only passthrough:
    /// no default-fill, the ACL is simply the only code allowed to read ZGW (§8.1).</summary>
    public Task<IReadOnlyList<ZaaktypeSummary>> ListZaaktypenAsync(CancellationToken ct = default) =>
        // ponytail: stub for the red test; real passthrough lands in the green commit.
        Task.FromResult<IReadOnlyList<ZaaktypeSummary>>([]);

    /// <summary>The zaak's reference (its ZGW identificatie), for the read projection (#78).</summary>
    public Task<string> GetZaakReferenceAsync(Uri zaakUrl, CancellationToken ct = default)
    {
        ArgumentNullException.ThrowIfNull(zaakUrl);

        return gateway.GetZaakIdentificatieAsync(zaakUrl, ct);
    }

    /// <summary>
    /// Store an uploaded diploma against the zaak (S-10b): default-fill the ZGW-mandatory document
    /// fields (informatieobjecttype, bronorganisatie, vertrouwelijkheidaanduiding, taal, creatiedatum)
    /// and hand the file to the gateway, which creates the informatieobject and relates it to the zaak.
    /// The domain supplies only the zaak, the bytes, and the file's name/type (§8.1).
    /// </summary>
    public async Task<Uri> StoreDiplomaAsync(Uri zaakUrl, byte[] content, string fileName, string contentType, CancellationToken ct = default)
    {
        ArgumentNullException.ThrowIfNull(zaakUrl);
        ArgumentNullException.ThrowIfNull(content);
        ArgumentException.ThrowIfNullOrWhiteSpace(fileName);
        ArgumentException.ThrowIfNullOrWhiteSpace(contentType);

        var request = new DocumentRequest(
            defaults.Bronorganisatie,
            await catalog.GetInformatieobjecttypeUrlAsync(ct),
            defaults.Vertrouwelijkheidaanduiding,
            zaakUrl,
            clock.Today,
            Titel: "Diploma",
            Auteur: "zorgprofessional",
            Taal: "nld",
            Bestandsnaam: fileName,
            Formaat: contentType,
            Inhoud: content);

        return await gateway.StoreDocumentAsync(request, ct);
    }
}