using System.Reflection;
using Omika.Core.Observability;

namespace Omika.Tests.Observability.External;

/// <summary>
/// Garde-fous d'architecture de la Phase 5 (§8/§9/§65/§66/§72) : les packages
/// OpenTelemetry sont localisés UNIQUEMENT dans le projet infrastructure dédié
/// (Omika.Observability.External), jamais dans Core ni dans le métier (App /
/// App.Local / Data). Vérifications par réflexion sur les assemblies référencées.
/// </summary>
public class ExternalArchitectureTests
{
    [Fact]
    public void Core_DoesNotReferenceOpenTelemetry()
    {
        Assembly core = typeof(OmikaEvent).Assembly;

        Assert.DoesNotContain(core.GetReferencedAssemblies(), a => a.Name!.Contains("OpenTelemetry"));
        Assert.DoesNotContain(
            core.GetTypes(),
            t => (t.FullName ?? "").Contains("OpenTelemetry", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("Otlp", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("SigNoz", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("ClickHouse", StringComparison.OrdinalIgnoreCase));
    }

    [Theory]
    [InlineData("Omika.App")]
    [InlineData("Omika.App.Local")]
    [InlineData("Omika.Data")]
    public void BusinessAssemblies_DoNotReferenceExternalObservabilityInfrastructure(string assemblyName)
    {
        Assembly asm = Assembly.Load(assemblyName);

        Assert.DoesNotContain(asm.GetReferencedAssemblies(), a =>
            a.Name!.Contains("OpenTelemetry")
            || a.Name!.Contains("SigNoz")
            || a.Name!.Contains("ClickHouse"));

        Assert.DoesNotContain(
            asm.GetTypes(),
            t => (t.FullName ?? "").Contains("OpenTelemetry", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("Otlp", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("SigNoz", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("ClickHouse", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("ActivitySource", StringComparison.OrdinalIgnoreCase)
              || (t.FullName ?? "").Contains("TracerProvider", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public void TrackAndLog_Path_ExposesOnlyVoidMethods_NoNetwork()
    {
        // Le chemin Track()/Log() du métier reste strictement void (never-throw,
        // non bloquant, sans réseau) : le réseau OTel est DERRIÈRE le TelemetryWorker.
        foreach (MethodInfo method in typeof(IOmikaTelemetry).GetMethods()
            .Concat(typeof(IEventTracker).GetMethods())
            .Concat(typeof(IDiagnosticLogger).GetMethods()))
        {
            Assert.Equal(typeof(void), method.ReturnType);
        }
    }
}