using DigitalData.Auth.Abstractions;
using DigitalData.Auth.Client;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using DigitalData.Auth.API.Services;
using DigitalData.Auth.API.Services.Contracts;

namespace DigitalData.Auth.Tests.API;

// TODO: The test checks if the services are working. Performance measurement is ignored. Update it to measure performance as well.
[TestFixture]
public class AuthHubTests
{
    private string _hubUrl;

    private Func<Action<ClientParams>, ServiceProvider> Build;

    private readonly WebApplication? _app = null;

    private readonly Queue<IAsyncDisposable> _disposableAsync = new();

    private INotifier _notifier;

    private static int AvailablePort
    {
        get
        {
            using var listener = new System.Net.Sockets.TcpListener(System.Net.IPAddress.Loopback, 0);
            listener.Start();
            int port = ((System.Net.IPEndPoint)listener.LocalEndpoint).Port;
            listener.Stop();
            return port;
        }
    }

    [SetUp]
    public void Setup()
    {
        Build = options =>
        {
            var provider =  new ServiceCollection()
                    .AddAuthHubClient(options)
                    .BuildServiceProvider();

            _disposableAsync.Enqueue(provider);

            return provider;
        };

        // Create and run test server
        // Create builder and add SignalR service
        var builder = WebApplication.CreateBuilder();
        var config = builder.Configuration;
        builder.Services.AddSignalR();
        builder.Services.AddAuthService(
            config,
            consumers => consumers.Add(new(0, "mock", "123", "client.mock"))    // Set mock consumer
            );

        // Listen AvailablePort and map hub
        var _app = builder.Build();
        var url = $"http://localhost:{AvailablePort}";
        var hubRoute = "/auth-hub";
        _hubUrl = url + hubRoute;
        _app.Urls.Add(url);
        _app.MapHub<Auth.API.Hubs.AuthHub>(hubRoute);
        _app.Start();

        // Create notifier by app services
        _notifier = _app.Services.GetRequiredService<INotifier>();
    }

    [TearDown]
    public async Task TearDown()
    {
        // Stop test server
        if (_app is not null)
        {
            await _app.StopAsync();
            await _app.DisposeAsync();
            Console.WriteLine("Test server stopped.");
        }

        while (_disposableAsync.Count > 0)
            await _disposableAsync.Dequeue().DisposeAsync();
    }

    [Test]
    public async Task ReceiveMessage_ShouldCallOnMessageReceived()
    {
        // Arrange
        string rcv_name = string.Empty;
        string rcv_value = string.Empty;
        
        // Receiver client
        var provider_receiver = Build(opt =>
        {
            opt.Url = _hubUrl;
            opt.Events.OnMessageReceived = (name, value, logger) =>
            {
                rcv_name = name;
                rcv_value = value;
            };
        });
        var client_receiver = provider_receiver.GetRequiredService<IAuthClient>();
        await client_receiver.StartAsync();

        string name = "name";
        string value = "value";

        // Act
        await _notifier.UpdateKeyAsync(name, value);

        // delay fort getting answer
        await Task.Delay(2000);

        // Assert
        Assert.Multiple(() =>
        {
            Assert.That(rcv_name, Is.EqualTo(name));
            Assert.That(rcv_value, Is.EqualTo(value));
        });
    }
}