using Microsoft.Extensions.DependencyInjection;

namespace ZB.MOM.WW.ScadaBridge.DataConnectionLayer;

/// <summary>
/// DI registration extensions for the Data Connection Layer.
/// </summary>
public static class ServiceCollectionExtensions
{
    /// <summary>Registers Data Connection Layer options and core services.</summary>
    /// <param name="services">The DI service collection to register into.</param>
    /// <returns>The same <paramref name="services"/> instance for chaining.</returns>
    public static IServiceCollection AddDataConnectionLayer(this IServiceCollection services)
    {
        services.AddOptions<DataConnectionOptions>()
            .BindConfiguration("DataConnectionLayer");

        services.AddOptions<OpcUaGlobalOptions>()
            .BindConfiguration("OpcUa");

        services.AddOptions<MxGatewayGlobalOptions>()
            .BindConfiguration("MxGateway");

        // WP-34: Register the factory for protocol extensibility
        services.AddSingleton<IDataConnectionFactory, DataConnectionFactory>();

        return services;
    }

    /// <summary>Placeholder for actor registration; Data Connection Layer actors are created inside the ActorSystem.</summary>
    /// <param name="services">The DI service collection.</param>
    /// <returns>The same <paramref name="services"/> instance for chaining.</returns>
    public static IServiceCollection AddDataConnectionLayerActors(this IServiceCollection services)
    {
        // Actor registration happens in AkkaHostedService or SiteCommunicationActor setup.
        // DataConnectionManagerActor and DataConnectionActor instances are created by the actor system.
        return services;
    }
}