using System.Net.Http.Headers;

namespace ZymonicServices;

// https://github.com/reactiveui/refit?tab=readme-ov-file#reducing-header-boilerplate-with-delegatinghandlers-authorization-headers-worked-example


class ZymonicAPIHandler : DelegatingHandler
{
  private readonly IZymonicAA authTokenStore;
  private readonly IZymonicLogger _logger;
  public ZymonicAPIHandler(IZymonicLogger logger, IZymonicAA authTokenStore, HttpMessageHandler? innerHandler = null) : base(innerHandler ?? new HttpClientHandler() { UseCookies = false })
  {

    this.authTokenStore = authTokenStore ?? throw new ArgumentNullException(nameof(authTokenStore));
    _logger = logger;
  }

  protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
  {

    var token = await authTokenStore.GetToken();

    request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);

    try
    {

      var result = await base.SendAsync(request, cancellationToken).ConfigureAwait(true);

      result.EnsureSuccessStatusCode();

      return result;
    }
    catch (Exception e)
    {
      debugInnerException(e);

      throw;
    }

  }

  private void debugInnerException(Exception exception)
  {
    _logger.LogError(exception.ToString());
    if (exception.InnerException != null)
    {
      debugInnerException(exception.InnerException);
    }
  }
}