using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using FinlyticEngine.Services.Mqtt;

namespace FinlyticEngine.Tests.TestSupport;

/// <summary>
/// Fake for <see cref="IEngineRpcClient"/>. Records every published MQTT event so tests can assert on
/// fire-and-forget notifications without a real broker (Rules.md §13: isolated, non-destructive tests only).
/// </summary>
public class FakeEngineRpcClient : IEngineRpcClient
{
    public List<(string Topic, object? Data)> PublishedMessages { get; } = new();

    /// <inheritdoc />
    public Task<TResponse?> SendRpcRequestAsync<TResponse, TRequest>(string channel, TRequest requestData, TimeSpan? timeout = null)
        where TResponse : class
        where TRequest : class
        => throw new InvalidOperationException(
            "SendRpcRequestAsync is only used by EvaluateAssetAsync, which is out of scope for the tenant-boundary tests in this suite.");

    /// <inheritdoc />
    public Task PublishAsync<T>(string topic, T data, bool retain = false)
    {
        PublishedMessages.Add((topic, data));
        return Task.CompletedTask;
    }
}