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

namespace DigitalData.Auth.Tests.Client;

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

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

    private WebApplication? _app = null;

    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 => new ServiceCollection()
        .AddAuthHubClient(options)
        .BuildServiceProvider();

        // Create and run test server
        // Create builder and add SignalR service
        var builder = WebApplication.CreateBuilder();
        builder.Services.AddSignalR();

        // 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<AuthHub>(hubRoute);
        _app.Start();
    }

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

    [Test]
    public async Task StartAsync_ShouldConnectSuccessfully()
    {
        // Arrange
        using var provider = Build(opt => opt.Url = _hubUrl);
        var client = provider.GetRequiredService<IAuthClient>();

        // Act
        await client.StartAsync();

        // Assert
        Assert.Multiple(() =>
        {
            Assert.That(client.IsConnected);
            Assert.That(!client.IsConnectionFailed);
            Assert.That(client.ConnectionError, Is.Null);
        });
    }

    [Test]
    public async Task ReceiveMessage_ShouldCallOnMessageReceived()
    {
        // Arrange
        string rcv_user = string.Empty;
        string rcv_msg = string.Empty;

        // Sender client
        using var provider_sender = Build(opt => opt.Url = _hubUrl);
        var sender_client = provider_sender.GetRequiredService<IAuthClient>();
        await sender_client.StartAsync();

        // Receiver client
        using var provider_receiver = Build(opt =>
        {
            opt.Url = _hubUrl;
            opt.Events.OnMessageReceived = (user, message, logger) =>
            {
                rcv_user = user;
                rcv_msg = message;
            };
        });
        var client_receiver = provider_receiver.GetRequiredService<IAuthClient>();
        await client_receiver.StartAsync();

        string user = "user";
        string message = "message";

        // Act
        await sender_client.SendKeyAsync(user, message);

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

        // Assert
        Assert.Multiple(() =>
        {
            Assert.That(rcv_user, Is.EqualTo(user));
            Assert.That(rcv_msg, Is.EqualTo(message));
        });
    }
}