using System.Text.Json;
using BigRegister.Api.Zgw;

namespace BigRegister.Tests;

/// <summary>
/// The anti-corruption map is where ZGW's URL-as-identity + cross-service zaaktype join get
/// flattened into the FE's existing DTO. Feeds a captured ZGW Zaak shape and asserts the
/// mapping — the guarantee that the FE never sees a ZGW shape.
/// </summary>
public class ZgwZaakMapperTests
{
  private const string OpenZaakJson = """
    {
      "url": "https://open-zaak.example/zaken/api/v1/zaken/6f2c5f6e-1b1a-4b7e-9c3d-000000000001",
      "identificatie": "ZAAK-2026-0000000001",
      "zaaktype": "https://open-zaak.example/catalogi/api/v1/zaaktypen/aaaaaaaa-0000-0000-0000-000000000001",
      "startdatum": "2026-03-01",
      "einddatum": null,
      "registratiedatum": "2026-03-02"
    }
    """;

  private const string ClosedZaakJson = """
    {
      "url": "https://open-zaak.example/zaken/api/v1/zaken/6f2c5f6e-1b1a-4b7e-9c3d-000000000002",
      "identificatie": "ZAAK-2026-0000000002",
      "zaaktype": "https://open-zaak.example/catalogi/api/v1/zaaktypen/aaaaaaaa-0000-0000-0000-000000000001",
      "startdatum": "2026-01-05",
      "einddatum": "2026-02-10",
      "registratiedatum": "2026-01-06"
    }
    """;

  [Fact]
  public void Maps_url_identity_zaaktype_and_open_status()
  {
    var zaak = JsonSerializer.Deserialize<ZgwZaak>(OpenZaakJson)!;

    var dto = ZgwZaakMapper.ToSummaryDto(zaak, "Herregistratie arts");

    // URL as identity → the trailing uuid, not the whole URL.
    Assert.Equal("6f2c5f6e-1b1a-4b7e-9c3d-000000000001", dto.Id);
    // zaaktype URL resolved to its human label (the cross-service join).
    Assert.Equal("Herregistratie arts", dto.Type);
    Assert.Equal("ZAAK-2026-0000000001", dto.Status.Referentie);
    Assert.Equal("InBehandeling", dto.Status.Tag);   // no einddatum → open
    Assert.True(dto.Status.Manual);
    Assert.Empty(dto.DocumentIds);
    // Wire shape matches the local source: round-trip datetime at midnight UTC.
    Assert.Equal("2026-03-02T00:00:00.0000000Z", dto.CreatedAt);
  }

  [Fact]
  public void Closed_zaak_maps_to_goedgekeurd()
  {
    var zaak = JsonSerializer.Deserialize<ZgwZaak>(ClosedZaakJson)!;

    var dto = ZgwZaakMapper.ToSummaryDto(zaak, "Herregistratie arts");

    Assert.Equal("Goedgekeurd", dto.Status.Tag);
    Assert.Equal("2026-02-10T00:00:00.0000000Z", dto.UpdatedAt);   // einddatum drives UpdatedAt
  }

  [Fact]
  public void Uuid_extracts_trailing_segment_ignoring_trailing_slash()
  {
    Assert.Equal("abc", ZgwZaakMapper.Uuid("https://host/zaken/api/v1/zaken/abc"));
    Assert.Equal("abc", ZgwZaakMapper.Uuid("https://host/zaken/api/v1/zaken/abc/"));
  }
}