using Microsoft.Extensions.DependencyInjection;

namespace ZB.MOM.WW.ScadaBridge.SiteCallAudit;

/// <summary>
/// Composition root for the Site Call Audit (#22) component.
/// </summary>
/// <remarks>
/// <para>
/// Binds <see cref="SiteCallAuditOptions"/> (stuck-call detection + KPI
/// windowing for the read-side query/KPI handlers). The reconciliation puller
/// and central→site Retry/Discard relay are still deferred to later follow-ups.
/// </para>
/// <para>
/// The repository (<c>ISiteCallAuditRepository</c>) is registered by
/// <c>ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.ServiceCollectionExtensions.AddConfigurationDatabase</c>,
/// so callers (the Host on the central node) must also call that. The actor's
/// <c>Props</c> are wired up in Host registration.
/// </para>
/// </remarks>
public static class ServiceCollectionExtensions
{
    /// <summary>Configuration section bound to <see cref="SiteCallAuditOptions"/>.</summary>
    public const string OptionsSection = "ScadaBridge:SiteCallAudit";

    /// <summary>
    /// Registers Site Call Audit (#22) services: the <see cref="SiteCallAuditOptions"/>
    /// binding consumed by the actor's read-side KPI/query handlers. The actor's
    /// <c>Props</c> are still constructed inline in Host wiring.
    /// </summary>
    /// <param name="services">The service collection to register into.</param>
    /// <returns>The same <paramref name="services"/> collection, for chaining.</returns>
    public static IServiceCollection AddSiteCallAudit(this IServiceCollection services)
    {
        ArgumentNullException.ThrowIfNull(services);

        services.AddOptions<SiteCallAuditOptions>()
            .BindConfiguration(OptionsSection);

        return services;
    }
}