using System.Net;
using LehrerApp.Desktop.Services;
using LehrerApp.Sync;
using Xunit;

namespace LehrerApp.Desktop.Tests;

public sealed class SyncAuthServiceProtocolTests
{
    [Fact]
    public async Task TestConnectionAsync_InkompatibleVersion_WirdNichtAlsOfflineGemeldet()
    {
        HttpRequestMessage? sent = null;
        var service = new SyncAuthService(new HttpClient(new Handler(request =>
        {
            sent = request;
            return new HttpResponseMessage(HttpStatusCode.UpgradeRequired);
        })));

        var result = await service.TestConnectionAsync("https://sync.example.invalid", "token");

        Assert.Equal(SyncConnectionTestResult.IncompatibleVersion, result);
        Assert.Equal(SyncProtocol.CurrentVersion,
            sent!.Headers.GetValues(SyncProtocol.VersionHeaderName).Single());
    }

    private sealed class Handler(Func<HttpRequestMessage, HttpResponseMessage> response) : HttpMessageHandler
    {
        protected override Task<HttpResponseMessage> SendAsync(
            HttpRequestMessage request, CancellationToken cancellationToken) =>
            Task.FromResult(response(request));
    }
}