using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging.Abstractions;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Configuration.LocalCache;

namespace ZB.MOM.WW.OtOpcUa.Server.Tests;

/// <summary>
///     Regression for Server-014 — <see cref="SealedBootstrap"/> exists in the source tree and
///     is referenced by <c>docs/v2/v2-release-readiness.md</c> as the closed release blocker for
///     generation-sealed config plumbing, but it was never registered in the production DI
///     container. The release blocker remained de-facto open. This test asserts the DI
///     registrations (which <c>Program.cs</c> performs at startup) actually compose: every
///     dependency <see cref="SealedBootstrap"/> needs — <see cref="GenerationSealedCache"/>,
///     <see cref="ResilientConfigReader"/>, <see cref="StaleConfigFlag"/> — must be resolvable
///     so the production wire-up doesn't fail with a missing-service exception at startup.
/// </summary>
[Trait("Category", "Unit")]
public sealed class SealedBootstrapWiringTests
{
    [Fact]
    public void SealedBootstrap_and_its_dependencies_are_registered_in_DI()
    {
        var tempRoot = Path.Combine(Path.GetTempPath(), $"otopcua-sealed-bootstrap-wiring-{Guid.NewGuid():N}");
        try
        {
            // Mirror Program.cs's registrations of NodeOptions + the SealedBootstrap chain.
            var services = new ServiceCollection();
            ZB.MOM.WW.OtOpcUa.Server.ServerWiring.AddSealedBootstrap(services, new NodeOptions
            {
                NodeId = "test-node",
                ClusterId = "test-cluster",
                ConfigDbConnectionString = "Server=fake;Database=fake;Integrated Security=true;",
                LocalCachePath = tempRoot,
            });
            services.AddSingleton(NullLoggerFactory.Instance);
            services.AddLogging();

            using var sp = services.BuildServiceProvider();

            sp.GetRequiredService<GenerationSealedCache>().ShouldNotBeNull();
            sp.GetRequiredService<ResilientConfigReader>().ShouldNotBeNull();
            sp.GetRequiredService<StaleConfigFlag>().ShouldNotBeNull();
            sp.GetRequiredService<SealedBootstrap>().ShouldNotBeNull();
        }
        finally
        {
            try { if (Directory.Exists(tempRoot)) Directory.Delete(tempRoot, recursive: true); } catch { }
        }
    }
}