using System.Net;
using System.Net.Http.Json;
using BigRegister.Api.Contracts;
using BigRegister.Api.Data;
using BigRegister.Domain.Applications;
using BigRegister.Tests.Builders;

namespace BigRegister.Tests.Acceptance;

/// <summary>
/// Behaviour-level tests for the scholing-threshold enforcement (WP-69) over both live HTTP
/// paths — <c>POST /applications/{id}/submit</c> (the wizard's real path) and the legacy
/// <c>POST /intakes</c> (dead from the UI, still a live crafted-POST surface). Built through
/// the <see cref="Given"/> type-state builder, mirroring <see cref="BesluitLifecycleTests"/>
/// rather than the full wizard/upload dance — the builder's default owner IS
/// <see cref="BigRegister.Api.Domain.Authorization.StubIdentityProvider"/>'s default caller,
/// so no header juggling.
/// </summary>
public class IntakeSubmissionTests(TestWebApplicationFactory factory) : IClassFixture<TestWebApplicationFactory>
{
  private readonly HttpClient _client = factory.CreateClient();

  private static void Persist(Aanvraag aanvraag)
  {
    using var db = Db.Create();
    db.Applications.Add(aanvraag);
    db.SaveChanges();
  }

  private Task<HttpResponseMessage> Submit(string id, object body) =>
      _client.PostAsJsonAsync($"/api/v1/applications/{id}/submit", body);

  [Fact]
  public async Task Below_threshold_without_an_answer_is_rejected_and_stays_a_concept()
  {
    // Given an intake-typed Concept aanvraag (not yet submitted).
    var aanvraag = Given.Concept(type: "intake").Build();
    Persist(aanvraag);

    // When it is submitted with uren below the threshold and no scholing answer at all...
    var res = await Submit(aanvraag.Id, new { uren = 500 });

    // Then the request is rejected as a contract violation (400, not a merit rejection)...
    Assert.Equal(HttpStatusCode.BadRequest, res.StatusCode);

    // ...and the aanvraag is left a retryable Concept, never marked Submitted.
    var stillConcept = ApplicationStore.GetAny(aanvraag.Id)!;
    Assert.False(stillConcept.Submitted);
  }

  [Fact]
  public async Task Below_threshold_with_an_answer_succeeds()
  {
    // Given an intake-typed Concept.
    var aanvraag = Given.Concept(type: "intake").Build();
    Persist(aanvraag);

    // When submitted below the threshold with "niet gevolgd" — a complete, legal answer...
    var res = await Submit(aanvraag.Id, new { uren = 500, aanvullendeScholing = false });

    // Then the submission succeeds.
    res.EnsureSuccessStatusCode();
  }

  [Fact]
  public async Task Above_threshold_needs_no_answer()
  {
    // Given an intake-typed Concept.
    var aanvraag = Given.Concept(type: "intake").Build();
    Persist(aanvraag);

    // When submitted with uren at/above the threshold and no scholing answer...
    var res = await Submit(aanvraag.Id, new { uren = 1000 });

    // Then it succeeds — the question is moot above the threshold.
    res.EnsureSuccessStatusCode();
  }

  [Fact]
  public async Task Punten_without_gevolgd_is_rejected()
  {
    // Given an intake-typed Concept.
    var aanvraag = Given.Concept(type: "intake").Build();
    Persist(aanvraag);

    // When submitted above the threshold with punten but no "gevolgd" answer — the stale
    // shape §6 fixes on the frontend, still reachable as a crafted POST...
    var res = await Submit(aanvraag.Id, new { uren = 1500, scholingPunten = 150 });

    // Then it is rejected.
    Assert.Equal(HttpStatusCode.BadRequest, res.StatusCode);
  }

  [Fact]
  public async Task Herregistratie_is_unaffected_by_the_intake_only_gate()
  {
    // Given a herregistratie-typed Concept (no scholing question in that wizard).
    var aanvraag = Given.Concept(type: "herregistratie").Build();
    Persist(aanvraag);

    // When submitted below the intake threshold with no scholing answer at all...
    var res = await Submit(aanvraag.Id, new { uren = 500 });

    // Then it still succeeds — the gate is intake-only.
    res.EnsureSuccessStatusCode();
  }

  [Fact]
  public async Task Zero_uren_is_still_afgewezen_not_a_400()
  {
    // Given an intake-typed Concept.
    var aanvraag = Given.Concept(type: "intake").Build();
    Persist(aanvraag);

    // When submitted with zero uren and no scholing answer — completeness would also
    // reject this, but the merit rejection (RejectZeroUren) must win (the ordering guard)...
    var res = await Submit(aanvraag.Id, new { uren = 0 });

    // Then the submission is accepted and resolves to Afgewezen — not a 400.
    res.EnsureSuccessStatusCode();
    var body = (await res.Content.ReadFromJsonAsync<SubmitApplicationResponse>())!;
    Assert.Equal("Afgewezen", body.Status.Tag);
  }

  [Fact]
  public async Task Legacy_intakes_endpoint_enforces_it_too()
  {
    // Given no aanvraag needed — the legacy endpoint mints its own reference.
    // When a crafted POST hits the dead-from-the-UI /intakes endpoint below threshold,
    // with no scholing answer...
    var res = await _client.PostAsJsonAsync("/api/v1/intakes", new { uren = 500 });

    // Then it is rejected too — the crafted-POST surface this WP closes.
    Assert.Equal(HttpStatusCode.BadRequest, res.StatusCode);
  }
}