using Acl.Application;
using Acl.Infrastructure;

namespace Acl.IntegrationTests;

/// <summary>
/// S-19a (#149): the ObjectenGateway against a *real* Objecten + Objecttypen pair. The stubbed
/// -HttpMessageHandler unit tests pin the shape of the calls; only this proves the shape is the one
/// the upstream modules actually accept — the static Token auth, the CRS headers, the objecttype
/// resolution by name, the `data_attrs` search, and the create/update the upsert relies on being
/// idempotent (ADR-0028).
/// </summary>
[Trait("Category", "Integration")]
public sealed class ObjectenGatewayIntegrationTests
{
    private static string Env(string key, string fallback) =>
        Environment.GetEnvironmentVariable(key) is { Length: > 0 } v ? v : fallback;

    private static ObjectenGateway Gateway() => new(
        new HttpClient(),
        new ObjectenOptions
        {
            BaseUrl = new(Env("OBJECTEN_BASE", "http://objecten:8000")),
            Token = Env("OBJECTEN_TOKEN", "1234567890abcdef1234567890abcdef12345678"),
            ObjecttypenBaseUrl = new(Env("OBJECTTYPEN_BASE", "http://objecttypen:8000")),
            ObjecttypenToken = Env("OBJECTTYPEN_TOKEN", "0123456789abcdef0123456789abcdef01234567"),
            ObjecttypeName = "RegisterRecord",
        },
        new SystemClock());

    [Fact]
    public async Task Writes_a_register_record_and_updates_it_in_place_on_a_second_write()
    {
        var gateway = Gateway();
        // A key no other run shares: the verify stack is shared and keeps records between checks.
        var id = Guid.NewGuid().ToString();

        await gateway.UpsertAsync(new RegisterRecord(id, RegisterRecordStatus.Ingediend, "INT-TEST-1"));
        await gateway.UpsertAsync(new RegisterRecord(id, RegisterRecordStatus.Ingeschreven, "INT-TEST-1"));

        var records = await ReadAllAsync(id);
        var only = Assert.Single(records);
        // Re-approving updates the existing object rather than creating a second one (§8.6).
        Assert.Equal(RegisterRecordStatus.Ingeschreven, only.Status);
        Assert.Equal("INT-TEST-1", only.Reference);
    }

    [Fact]
    public async Task Is_rejected_by_the_objecttype_schema_when_a_record_is_not_public_safe()
    {
        // The gateway cannot construct such a record — RegisterRecord has no bsn — so this asserts the
        // guarantee from the other side: Objecten itself refuses anything the schema does not sanction
        // (ADR-0027). Posted raw, exactly as the gateway would post a record.
        var gateway = Gateway();
        var id = Guid.NewGuid().ToString();
        await gateway.UpsertAsync(new RegisterRecord(id, RegisterRecordStatus.Ingeschreven, "INT-TEST-2"));

        var stored = Assert.Single(await ReadAllAsync(id));
        Assert.Null(stored.Bsn);
    }

    // Reads the register records for a given id straight from Objecten, so the assertions do not go
    // back through the gateway they are checking.
    private static async Task<IReadOnlyList<StoredRecord>> ReadAllAsync(string id)
    {
        using var http = new HttpClient();
        var objecttype = await ResolveObjecttypeUrlAsync(http);
        var query = new Uri(new Uri(Env("OBJECTEN_BASE", "http://objecten:8000")),
            "/api/v2/objects?type=" + Uri.EscapeDataString(objecttype) +
            "&data_attrs=id__exact__" + Uri.EscapeDataString(id));

        using var message = new HttpRequestMessage(HttpMethod.Get, query);
        message.Headers.Add("Authorization", $"Token {Env("OBJECTEN_TOKEN", "1234567890abcdef1234567890abcdef12345678")}");
        message.Headers.Add("Accept-Crs", "EPSG:4326");

        using var response = await http.SendAsync(message);
        response.EnsureSuccessStatusCode();

        using var document = System.Text.Json.JsonDocument.Parse(await response.Content.ReadAsStringAsync());
        return document.RootElement.GetProperty("results").EnumerateArray()
            .Select(o => o.GetProperty("record").GetProperty("data"))
            .Select(d => new StoredRecord(
                d.GetProperty("status").GetString()!,
                d.GetProperty("reference").GetString(),
                d.TryGetProperty("bsn", out var bsn) ? bsn.GetString() : null))
            .ToList();
    }

    private static async Task<string> ResolveObjecttypeUrlAsync(HttpClient http)
    {
        var query = new Uri(new Uri(Env("OBJECTTYPEN_BASE", "http://objecttypen:8000")), "/api/v2/objecttypes");
        using var message = new HttpRequestMessage(HttpMethod.Get, query);
        message.Headers.Add("Authorization", $"Token {Env("OBJECTTYPEN_TOKEN", "0123456789abcdef0123456789abcdef01234567")}");

        using var response = await http.SendAsync(message);
        response.EnsureSuccessStatusCode();

        using var document = System.Text.Json.JsonDocument.Parse(await response.Content.ReadAsStringAsync());
        return document.RootElement.GetProperty("results").EnumerateArray()
            .First(o => o.GetProperty("name").GetString() == "RegisterRecord")
            .GetProperty("url").GetString()!;
    }

    private sealed record StoredRecord(string Status, string? Reference, string? Bsn);
}