using Big.Domain;

namespace Big.Application;

/// <summary>
/// The port to the workflow engine. Implemented by the Workflow Client in Infrastructure — the
/// <em>only</em> code that talks to Flowable (CLAUDE.md §8.2). The application asks it to start the
/// registratie process; it never knows Flowable exists.
/// </summary>
public interface IWorkflowClient
{
    /// <summary>
    /// Start one <c>registratie</c> process instance for the given registration, carrying the
    /// registration id so the <c>OpenZaakAanmaken</c> external task can be correlated back to its
    /// aggregate. Returns the process instance id.
    /// </summary>
    Task<string> StartRegistrationProcessAsync(RegistrationId registrationId, CancellationToken ct = default);
}

/// <summary>
/// The port to the Anti-Corruption Layer. Implemented in Infrastructure by an HTTP client to the
/// ACL service — the <em>only</em> code that talks to ZGW (CLAUDE.md §8.1). The domain hands over a
/// bsn; the ACL default-fills the ZGW-mandatory fields (ADR-0003) and returns the created zaak URL.
/// </summary>
public interface IAclClient
{
    Task<Uri> OpenZaakAsync(string bsn, CancellationToken ct = default);

    /// <summary>
    /// Record the approval on the given zaak. The ACL translates this to the ZGW concept — setting
    /// the zaak's final status — which OpenZaak notifies over NRC; the domain never names statustypen.
    /// </summary>
    Task ApproveZaakAsync(Uri zaakUrl, CancellationToken ct = default);
}

/// <summary>
/// Persistence port for the <see cref="Registration"/> aggregate. In-memory for the minimal slice
/// (ADR-0009); an EF-backed store is a documented follow-up, and this port keeps that change additive.
/// </summary>
public interface IRegistrationStore
{
    /// <summary>Insert or update the registration, keyed on its id.</summary>
    Task SaveAsync(Registration registration, CancellationToken ct = default);

    /// <summary>Load a registration by id, or <c>null</c> if none exists.</summary>
    Task<Registration?> GetAsync(RegistrationId id, CancellationToken ct = default);
}

/// <summary>
/// An acquired <c>OpenZaakAanmaken</c> external-worker job: the Flowable job id (needed to complete
/// it) and the registration id it carries as a process variable.
/// </summary>
public sealed record OpenZaakJob(string JobId, RegistrationId RegistrationId);