using EventSubscriber.Application;

namespace EventSubscriber.Tests;

/// <summary>Behaviour of the projector that turns NRC notifications into projection rows.
/// The walking skeleton reacts only to a zaak being created (status INGEDIEND) and must
/// tolerate duplicate and out-of-order deliveries (CLAUDE.md §8.6).</summary>
public sealed class NotificationProjectorTests
{
    private const string ZaakUrl = "http://openzaak:8000/zaken/api/v1/zaken/11111111-1111-1111-1111-111111111111";

    private readonly InMemoryNotificationLog _log = new();
    private readonly InMemoryProjectionStore _store = new();

    private NotificationProjector Projector() => new(_log, _store);

    private static Notification ZaakCreated(string url = ZaakUrl)
        => new("zaken", "zaak", "create", new Uri(url));

    [Fact]
    public async Task creating_a_zaak_writes_one_row_with_status_ingediend()
    {
        await Projector().HandleAsync(ZaakCreated());

        var entry = Assert.Single(await _store.AllAsync());
        Assert.Equal("11111111-1111-1111-1111-111111111111", entry.Id);
        Assert.Equal(RegistrationStatus.Ingediend, entry.Status);
    }

    [Fact]
    public async Task replaying_the_same_notification_keeps_a_single_row()
    {
        var projector = Projector();
        await projector.HandleAsync(ZaakCreated());
        await projector.HandleAsync(ZaakCreated());

        Assert.Single(await _store.AllAsync());
    }

    [Fact]
    public async Task a_notification_on_another_kanaal_is_ignored()
    {
        await Projector().HandleAsync(new Notification("documenten", "enkelvoudiginformatieobject", "create", new Uri(ZaakUrl)));

        Assert.Empty(await _store.AllAsync());
    }

    [Fact]
    public async Task a_zaak_update_is_ignored_by_the_minimal_projection()
    {
        await Projector().HandleAsync(new Notification("zaken", "zaak", "update", new Uri(ZaakUrl)));

        Assert.Empty(await _store.AllAsync());
    }

    [Fact]
    public async Task rebuild_repopulates_the_projection_from_the_notification_log()
    {
        var projector = Projector();
        await projector.HandleAsync(ZaakCreated());
        await _store.ClearAsync();
        Assert.Empty(await _store.AllAsync());

        await projector.RebuildAsync();

        var entry = Assert.Single(await _store.AllAsync());
        Assert.Equal(RegistrationStatus.Ingediend, entry.Status);
    }
}