using Omika.Core.Observability.Outbox;

namespace Omika.Tests.Observability.Outbox;

/// <summary>Tests de la validation stricte serveur (§32, §28, §29, §60).</summary>
public class DiagnosticBatchValidatorTests
{
    private static readonly RemoteDiagnosticOptions Limits = new();

    private static DiagnosticBatchDto NewBatch(int eventCount = 1) =>
        new()
        {
            SchemaVersion = 1,
            Events = Enumerable.Range(0, eventCount)
                .Select(i => new DiagnosticEventDto
                {
                    EventId = Guid.NewGuid(),
                    EventCode = "OMK-MOB-APP-001",
                    TimestampUtc = DateTimeOffset.UtcNow,
                    Level = "Info",
                    Priority = "P3"
                })
                .ToList()
        };

    [Fact]
    public void ValidBatch_Passes()
    {
        DiagnosticValidationResult result = DiagnosticBatchValidator.Validate(NewBatch(), Limits);
        Assert.True(result.IsValid);
    }

    [Fact]
    public void NullBatch_Rejected()
    {
        Assert.False(DiagnosticBatchValidator.Validate(null, Limits).IsValid);
    }

    [Fact]
    public void WrongSchemaVersion_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch();
        batch = new DiagnosticBatchDto { SchemaVersion = 999, Events = batch.Events };
        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }

    [Fact]
    public void EmptyBatch_Rejected()
    {
        Assert.False(DiagnosticBatchValidator.Validate(new DiagnosticBatchDto(), Limits).IsValid);
    }

    [Fact]
    public void TooManyEvents_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch(Limits.MaxEventsPerBatch + 1);
        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }

    [Fact]
    public void EmptyEventId_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch();
        batch.Events[0] = new DiagnosticEventDto { EventCode = "OMK-MOB-APP-001" };
        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }

    [Fact]
    public void ForbiddenMetadataKey_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch();
        batch.Events[0] = new DiagnosticEventDto
        {
            EventId = Guid.NewGuid(),
            EventCode = "OMK-MOB-APP-001",
            Metadata = new Dictionary<string, object?> { ["password"] = "secret" }
        };

        DiagnosticValidationResult result = DiagnosticBatchValidator.Validate(batch, Limits);
        Assert.False(result.IsValid);
        Assert.Equal(DiagnosticValidationReason.ForbiddenMetadata, result.Reason);
    }

    [Fact]
    public void ForbiddenMetadataValue_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch();
        batch.Events[0] = new DiagnosticEventDto
        {
            EventId = Guid.NewGuid(),
            EventCode = "OMK-MOB-APP-001",
            Metadata = new Dictionary<string, object?> { ["error"] = "ConnectionString=secret" }
        };

        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }

    [Fact]
    public void TooManyMetadata_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch();
        var metadata = new Dictionary<string, object?>();
        for (int i = 0; i <= Limits.MaxMetadataCount; i++)
        {
            metadata[$"k{i}"] = i;
        }

        batch.Events[0] = new DiagnosticEventDto
        {
            EventId = Guid.NewGuid(),
            EventCode = "OMK-MOB-APP-001",
            Metadata = metadata
        };

        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }

    [Fact]
    public void OverlongString_Rejected()
    {
        DiagnosticBatchDto batch = NewBatch();
        batch.Events[0] = new DiagnosticEventDto
        {
            EventId = Guid.NewGuid(),
            EventCode = "OMK-MOB-APP-001",
            Component = new string('x', Limits.MaxStringLength + 1)
        };

        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }

    [Fact]
    public void ComplexMetadataValue_Rejected()
    {
        // Une valeur de métadonnée objet/tableau (non simple) est refusée.
        DiagnosticBatchDto batch = NewBatch();
        batch.Events[0] = new DiagnosticEventDto
        {
            EventId = Guid.NewGuid(),
            EventCode = "OMK-MOB-APP-001",
            Metadata = new Dictionary<string, object?> { ["nested"] = new { a = 1 } }
        };

        Assert.False(DiagnosticBatchValidator.Validate(batch, Limits).IsValid);
    }
}