using System.Net.Http.Headers;
using System.Net.Http.Json;
using BigRegister.Api.Contracts;
using BigRegister.Api.Zgw;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Testing;

namespace BigRegister.Tests;

/// <summary>
/// WP-54: the one test that proves the BFF actually talks to a REAL OpenZaak — auth accepted,
/// real response shapes, real pagination/zaaktype→aanvraag-type mapping — rather than the stub
/// HttpMessageHandler every other Zgw test (<see cref="ZgwZaakMapperTests"/>,
/// <see cref="OpenZaakZaakSourceTests"/>) uses. Requires the harness in <c>backend/openzaak/</c>
/// to be up and seeded first (see its README); tagged Category=Integration so it's excluded
/// from the default `dotnet test` run and from CI (`ci.yml`, `scripts/ci-local.sh` both filter
/// it out) — nobody without a live OpenZaak should see it fail.
///
/// Not an <see cref="IClassFixture{TFixture}"/> off <see cref="TestWebApplicationFactory"/>:
/// that fixture hardcodes <c>Zgw:Enabled=false</c> (offline default) for every other test class,
/// so this one builds its own <see cref="WebApplicationFactory{TEntryPoint}"/> layering the
/// harness's URLs/credentials (matching <c>backend/openzaak/setup_configuration/data.yaml</c>
/// and <c>bootstrap-catalogus.sh</c>) on top.
/// </summary>
[Trait("Category", "Integration")]
public class OpenZaakIntegrationTests
{
  private static WebApplicationFactory<Program> Factory(string zaaktypeUrl)
  {
    var dbPath = Path.Combine(Path.GetTempPath(), $"bigregister-oz-integration-{Guid.NewGuid():N}.db");
    return new WebApplicationFactory<Program>().WithWebHostBuilder(builder => builder
        .UseSetting("ConnectionStrings:AppDb", $"Data Source={dbPath}")
        .UseSetting("Zgw:Enabled", "true")
        .UseSetting("Zgw:ZrcBaseUrl", "http://localhost:8000/zaken/api/v1")
        .UseSetting("Zgw:ZtcBaseUrl", "http://localhost:8000/catalogi/api/v1")
        .UseSetting("Zgw:ClientId", "bigregister-test")
        .UseSetting("Zgw:Secret", "bigregister-test-secret")
        .UseSetting("Zgw:UserId", "bigregister-test")
        .UseSetting("Zgw:UserRepresentation", "WP-54 integration test")
        .UseSetting("Zgw:ZaaktypeUrls:herregistratie", zaaktypeUrl));
  }

  /// <summary>bootstrap-catalogus.sh mints the seeded zaaktype's uuid fresh per harness
  /// instance, so unlike every other setting <c>Factory</c> hardcodes, this one has to be
  /// discovered live — the same real HTTP + JWT this test is meant to exercise, done once up
  /// front to learn the URL <c>Zgw:ZaaktypeUrls</c> needs (see <see cref="OpenZaakZaakSource.AanvraagTypeFor"/>).</summary>
  private static async Task<string> SeededZaaktypeUrlAsync()
  {
    var tokenOptions = new ZgwOptions { ClientId = "bigregister-test", Secret = "bigregister-test-secret" };
    using var client = new HttpClient();
    client.DefaultRequestHeaders.Authorization =
        new AuthenticationHeaderValue("Bearer", new ZgwTokenProvider(tokenOptions).Mint());
    client.DefaultRequestHeaders.Add("Accept-Crs", "EPSG:4326");   // else OpenZaak 412s
    var page = await client.GetFromJsonAsync<ZgwPage<ZgwZaak>>(
        "http://localhost:8000/zaken/api/v1/zaken?identificatie=BIG-2026-000123");
    return Assert.Single(page!.Results).Zaaktype;
  }

  [Fact]
  public async Task Admin_cases_returns_the_seeded_zaak_mapped_through_real_HTTP_and_JWT()
  {
    using var factory = Factory(await SeededZaaktypeUrlAsync());
    using var client = factory.CreateClient();
    client.DefaultRequestHeaders.Add("X-Role", "admin");   // CasesAdmin gate (cases:manage)

    var cases = await client.GetFromJsonAsync<List<ApplicationSummaryDto>>("/api/v1/admin/cases");

    Assert.NotNull(cases);
    // bootstrap-catalogus.sh seeds exactly one zaak, identificatie BIG-2026-000123.
    var seeded = Assert.Single(cases!, c => c.Status.Referentie == "BIG-2026-000123");
    Assert.Equal("herregistratie", seeded.Type);
    Assert.Equal("InBehandeling", seeded.Status.Tag);
  }
}