using System.Text.Json;
using Microsoft.Extensions.Options;
using Omika.Core.Observability.Identity;
using Omika.Core.Observability.Outbox;
using Omika.Diagnostics.Import;
using Omika.Diagnostics.Models;
using Omika.Diagnostics.Queries;
using Omika.Diagnostics.Tests.Fakes;

namespace Omika.Diagnostics.Tests;

/// <summary>
/// Tests d'intégration ActorKey (§19/§20) : identité authentifiée → ActorKey →
/// événement canonique → JSONL → importeur → repository → filtre par ActorKey.
/// Vérifie aussi qu'aucun identifiant brut n'est persisté dans les données de
/// diagnostic (hors fixtures strictement internes au test).
/// </summary>
public class DiagnosticActorKeyIntegrationTests : IDisposable
{
    private static string TestKey() => Convert.ToBase64String(new byte[32]);

    private readonly string _dir = CreateTempDirectory();

    public void Dispose() => DeleteDirectory(_dir);

    [Fact]
    public async Task FullFlow_ComputesActorKey_AndPersistsIt_WithoutRawIdentity()
    {
        // Contexte : Tenant A = "BATIK.01", Collaborateur 42 (identité authentifiée).
        const string tenant = "BATIK.01";
        const string collaborateur = "42";

        DiagnosticActorKey actorKey = new DiagnosticActorKeyProvider(TestKey()).Compute(tenant, collaborateur);
        Assert.True(actorKey.HasValue);

        Guid eventId = Guid.NewGuid();
        var record = DiagnosticTestData.Record(
            eventId,
            "OMK-MOB-APP-001",
            actorKey: actorKey.Value,
            actorKeyVersion: actorKey.Version);

        var source = new FakeDiagnosticJsonlSource(new[] { record });
        var repository = new FakeDiagnosticEventRepository();
        var importer = new DiagnosticImporter(source, repository, Options.Create(new DiagnosticImportOptions { BatchSize = 100 }));

        DiagnosticImportResult result = await importer.ImportOnceAsync();

        Assert.True(result.Succeeded);
        Assert.Equal(1, result.ImportedCount);

        DiagnosticEventRecord persisted = (await repository.QueryAsync(new DiagnosticEventQuery())).Items.Single();
        Assert.Equal(actorKey.Value, persisted.ActorKey);
        Assert.Equal(actorKey.Version, persisted.ActorKeyVersion);

        // Aucun identifiant brut dans les champs persistés (le JSONL/MetadataJson
        // n'est pas scruté ici : il n'y en a pas dans ce cas de figure).
        Assert.DoesNotContain(collaborateur, persisted.EventCode, StringComparison.Ordinal);
        Assert.Null(persisted.MetadataJson);
    }

    [Fact]
    public async Task Repository_FiltersByActorKey()
    {
        const string actorA = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
        const string actorB = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";

        var repository = new FakeDiagnosticEventRepository();
        await repository.InsertBatchAsync(new[]
        {
            DiagnosticTestData.Event(Guid.NewGuid(), actorKey: actorA),
            DiagnosticTestData.Event(Guid.NewGuid(), actorKey: actorB),
            DiagnosticTestData.Event(Guid.NewGuid(), actorKey: null) // système / sans utilisateur
        });

        DiagnosticQueryResult<DiagnosticEventRecord> byA = await repository.QueryAsync(new DiagnosticEventQuery { ActorKey = actorA });

        Assert.Single(byA.Items);
        Assert.Equal(actorA, byA.Items[0].ActorKey);
    }

    [Fact]
    public async Task Store_PersistsActorKey_AndStripsRawIdentity()
    {
        var store = new RemoteDiagnosticIngestionStore(new RemoteDiagnosticOptions { Directory = _dir });
        DiagnosticActorKey actorKey = new DiagnosticActorKeyProvider(TestKey()).Compute("BATIK.01", "42");

        var batch = new DiagnosticBatchDto
        {
            BatchId = Guid.NewGuid(),
            Events =
            [
                new DiagnosticEventDto
                {
                    EventId = Guid.NewGuid(),
                    EventCode = "OMK-MOB-APP-001",
                    TimestampUtc = DateTimeOffset.UtcNow,
                    Level = "Info",
                    Priority = "P3",
                    // Identifiants bruts fournis par le mobile (transport) :
                    DeviceId = "device-1",
                    ClientId = "BATIK.01",
                    UserId = "user-1",
                    CollaborateurId = "42",
                    Component = "télémétrie"
                }
            ]
        };

        await store.StoreAsync(batch, actorKey, "trace-id", DateTimeOffset.UtcNow);

        string content = ReadAllTextShared(Assert.Single(Directory.EnumerateFiles(_dir, "*.jsonl")));

        // ActorKey + version présents dans l'enregistrement canonique.
        using (JsonDocument doc = JsonDocument.Parse(content))
        {
            JsonElement root = doc.RootElement;
            Assert.Equal(actorKey.Value, root.GetProperty("actorKey").GetString());
            Assert.Equal(actorKey.Version, root.GetProperty("actorKeyVersion").GetInt32());
        }

        // Les identifiants bruts ne sont PAS persistés dans le JSONL (§9).
        Assert.DoesNotContain("\"deviceId\"", content, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("\"clientId\"", content, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("\"userId\"", content, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("\"collaborateurId\"", content, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("device-1", content, StringComparison.Ordinal);
        Assert.DoesNotContain("user-1", content, StringComparison.Ordinal);
        Assert.DoesNotContain("\"42\"", content, StringComparison.Ordinal);
    }

    [Fact]
    public async Task Store_WithoutActorKey_WritesNullActorKey()
    {
        var store = new RemoteDiagnosticIngestionStore(new RemoteDiagnosticOptions { Directory = _dir });

        await store.StoreAsync(
            new DiagnosticBatchDto
            {
                Events = [new DiagnosticEventDto { EventId = Guid.NewGuid(), EventCode = "OMK-MOB-APP-001" }]
            },
            DiagnosticActorKey.Empty,
            "trace-id",
            DateTimeOffset.UtcNow);

        string content = ReadAllTextShared(Assert.Single(Directory.EnumerateFiles(_dir, "*.jsonl")));
        using JsonDocument doc = JsonDocument.Parse(content);
        // Champs null omis (WhenWritingNull) : ActorKey absent → propriété absente.
        Assert.False(doc.RootElement.TryGetProperty("actorKey", out _));
        Assert.False(doc.RootElement.TryGetProperty("actorKeyVersion", out _));
    }

    private static string CreateTempDirectory()
    {
        string dir = Path.Combine(Path.GetTempPath(), "omika-actor-key-tests", Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(dir);
        return dir;
    }

    private static string ReadAllTextShared(string path)
    {
        using var stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
        using var reader = new StreamReader(stream);
        return reader.ReadToEnd();
    }

    private static void DeleteDirectory(string dir)
    {
        try
        {
            if (Directory.Exists(dir))
            {
                Directory.Delete(dir, recursive: true);
            }
        }
        catch
        {
            // Best-effort.
        }
    }
}