using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Services;
using ZB.MOM.WW.ScadaBridge.Commons.Messages.Communication;

namespace ZB.MOM.WW.ScadaBridge.ManagementService.Tests;

/// <summary>
/// Test stand-in for the central cache-invalidation bus (ScadaBridge#100 item 3): records every
/// published invalidation and hands it to the "peer" node's handlers, as the subscriber on the
/// other central node would.
/// </summary>
internal sealed class PeerCacheInvalidationPublisher : ICentralCacheInvalidationPublisher
{
    private readonly ICentralCacheInvalidationHandler[] _peerHandlers;

    /// <summary>Creates the publisher.</summary>
    /// <param name="peerHandlers">The peer node's handlers.</param>
    public PeerCacheInvalidationPublisher(params ICentralCacheInvalidationHandler[] peerHandlers) =>
        _peerHandlers = peerHandlers;

    /// <summary>Gets every invalidation published.</summary>
    public List<ICentralCacheInvalidation> Published { get; } = new();

    /// <inheritdoc />
    public void Publish(ICentralCacheInvalidation invalidation)
    {
        lock (Published) Published.Add(invalidation);
        foreach (var handler in _peerHandlers)
            handler.Apply(invalidation);
    }
}