using System.Net;
using System.Text;

namespace ClaudeDo.Worker.Tests.Tickets;

/// <summary>
/// Fakes the HTTP transport for BandelTicketClient tests. No test using this may touch the
/// network — reused by later tasks that also exercise the ticket client.
/// </summary>
internal sealed class StubHandler : HttpMessageHandler
{
    public readonly List<HttpRequestMessage> Requests = new();
    public readonly List<string> Bodies = new();
    private readonly Func<HttpRequestMessage, (HttpStatusCode, string)> _respond;

    private readonly Exception? _throw;

    public StubHandler(Func<HttpRequestMessage, (HttpStatusCode, string)> respond) => _respond = respond;

    /// <summary>Lets a test reproduce a transport that blows up instead of answering.</summary>
    public StubHandler(Exception throwOnSend)
    {
        _respond = _ => (HttpStatusCode.OK, "");
        _throw = throwOnSend;
    }

    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken ct)
    {
        Requests.Add(request);
        Bodies.Add(request.Content is null ? "" : await request.Content.ReadAsStringAsync(ct));
        if (_throw is not null) throw _throw;
        var (code, body) = _respond(request);
        return new HttpResponseMessage(code) { Content = new StringContent(body, Encoding.UTF8, "application/json") };
    }
}