using Microsoft.Extensions.DependencyInjection;
using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;

namespace ZB.MOM.WW.ScadaBridge.AuditLog.Tests.TestSupport;

/// <summary>
/// Deferred-work register row 61 — the replacement for <c>AuditLogIngestActor</c>'s deleted
/// repository-taking "test-mode" constructor.
///
/// <para>
/// That constructor cached a scoped repository on an actor field for the actor's whole
/// lifetime. Nothing in production selected it, but the shape was one call site away from
/// re-introducing a captive-dependency bug, so it had to be allowlisted in the Host tests'
/// <c>CaptiveDependencyGuard</c>. The actor now has a single <see cref="IServiceProvider"/>
/// constructor; a fixture that wants a concrete repository builds one of these instead.
/// </para>
///
/// <para>
/// Behaviour is unchanged for the ingest path: the old ctor passed <c>redactor: null</c> and
/// <c>failureCounter: null</c>, and a provider with neither registered resolves both to null
/// too — so the actor still falls back to <c>SafeDefaultAuditRedactor</c> and still logs
/// without a health counter. The one deliberate difference is that
/// <c>IngestCachedTelemetryCommand</c> now takes the real dual-write handler rather than the
/// deleted "no dual write" stub; no fixture built on this helper sends that message.
/// </para>
/// </summary>
internal static class StubAuditRepositoryProvider
{
    /// <summary>
    /// Builds a provider whose every scope yields the same audit-log repository instance.
    /// </summary>
    /// <param name="repository">Repository instance shared by every scope.</param>
    /// <returns>A service provider whose scopes all resolve the supplied repository.</returns>
    public static ServiceProvider Build(IAuditLogRepository repository)
    {
        ArgumentNullException.ThrowIfNull(repository);

        return new ServiceCollection()
            .AddScoped(_ => repository)
            .BuildServiceProvider();
    }
}