using Microsoft.AspNetCore.SignalR;

namespace ZB.MOM.WW.OtOpcUa.Admin.Tests;

/// <summary>
///     Minimal in-memory <see cref="IHubContext{THub}"/> that captures SendAsync invocations for
///     assertion. Only the methods the <c>FleetStatusPoller</c> actually calls are implemented —
///     other interface surface throws to fail fast if the poller evolves new dependencies.
/// </summary>
public sealed class RecordingHubContext<THub> : IHubContext<THub> where THub : Hub
{
    public RecordingHubContext(RecordingHubClients clients) => Clients = clients;

    public IHubClients Clients { get; }
    public IGroupManager Groups => throw new NotImplementedException();
}

public sealed class RecordingHubClients : IHubClients
{
    public readonly List<RecordedMessage> SentMessages = [];

    public IClientProxy All => NotUsed();
    public IClientProxy AllExcept(IReadOnlyList<string> excludedConnectionIds) => NotUsed();
    public IClientProxy Client(string connectionId) => NotUsed();
    public IClientProxy Clients(IReadOnlyList<string> connectionIds) => NotUsed();
    public IClientProxy Group(string groupName) => new RecordingClientProxy(groupName, SentMessages);
    public IClientProxy GroupExcept(string groupName, IReadOnlyList<string> excludedConnectionIds) => NotUsed();
    public IClientProxy Groups(IReadOnlyList<string> groupNames) => NotUsed();
    public IClientProxy User(string userId) => NotUsed();
    public IClientProxy Users(IReadOnlyList<string> userIds) => NotUsed();

    private static IClientProxy NotUsed() => throw new NotImplementedException("not used by FleetStatusPoller");
}

public sealed class RecordingClientProxy(string target, List<RecordedMessage> sink) : IClientProxy
{
    public Task SendCoreAsync(string method, object?[] args, CancellationToken cancellationToken = default)
    {
        sink.Add(new RecordedMessage(target, method, args));
        return Task.CompletedTask;
    }
}

public sealed record RecordedMessage(string Target, string Method, object?[] Args);
