using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Hosting;

namespace FinlyticBackend.Util;

/// <summary>
/// Backward-compatible bridge forwarding RPC requests to the primary singleton <see cref="BackendMqttBridge"/>.
/// Prevents secondary MQTT connection instantiations in the gateway process.
/// </summary>
public class WebMqttClient : IHostedService
{
    private readonly BackendMqttBridge _bridge;

    public bool IsConnected => _bridge.IsConnected;

    public WebMqttClient(BackendMqttBridge bridge)
    {
        _bridge = bridge;
    }

    public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
    public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;

    public Task<TResponse?> SendRpcRequestAsync<TResponse, TRequest>(string channel, TRequest request, TimeSpan timeout)
        where TResponse : class
        where TRequest : class
    {
        return _bridge.SendRpcRequestAsync<TResponse, TRequest>(channel, request, timeout);
    }

    public Task<TResponse?> SendRpcRequestAsync<TResponse, TRequest>(string channel, TRequest request)
        where TResponse : class
        where TRequest : class
    {
        return _bridge.SendRpcRequestAsync<TResponse, TRequest>(channel, request);
    }

    public Task PublishAsync<T>(string topic, T payload)
    {
        return _bridge.PublishAsync(topic, payload);
    }
}