using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
using ZB.MOM.WW.ScadaBridge.NotificationOutbox.Delivery;

namespace ZB.MOM.WW.ScadaBridge.CentralUI.Services;

/// <summary>
/// Default <see cref="INotificationChannelCatalog"/> that derives the supported channels
/// from the registered <see cref="INotificationDeliveryAdapter"/> set. The central Host
/// registers the Email + SMS adapters (see <c>AddNotificationOutbox</c>) into the same DI
/// container that hosts the Central UI, so projecting each adapter's
/// <see cref="INotificationDeliveryAdapter.Type"/> yields exactly the channels the central
/// node can actually deliver — no hardcoded <c>{Email, Sms}</c> list to drift.
/// </summary>
public sealed class NotificationChannelCatalog : INotificationChannelCatalog
{
    /// <summary>
    /// Initializes the catalog from the registered delivery adapters, snapshotting the
    /// distinct channel set once (the adapter registrations are fixed for the process
    /// lifetime). Ordering follows the <see cref="NotificationType"/> enum so the UI Type
    /// selector renders in a stable order regardless of adapter registration order.
    /// </summary>
    /// <param name="adapters">The registered delivery adapters (one per channel).</param>
    public NotificationChannelCatalog(IEnumerable<INotificationDeliveryAdapter> adapters)
    {
        ArgumentNullException.ThrowIfNull(adapters);

        SupportedChannels = adapters
            .Select(a => a.Type)
            .Distinct()
            .OrderBy(t => (int)t)
            .ToArray();
    }

    /// <inheritdoc />
    public IReadOnlyList<NotificationType> SupportedChannels { get; }
}