from opentelemetry.sdk.trace import TracerProvider

from app import telemetry


def test_telemetry_is_fail_open_without_endpoint(monkeypatch) -> None:
    monkeypatch.delenv("OTEL_EXPORTER_OTLP_ENDPOINT", raising=False)
    monkeypatch.setattr(telemetry, "_runtime", None)

    assert telemetry.init_telemetry("test-service") is None


def test_structlog_processor_adds_active_trace_context_only() -> None:
    provider = TracerProvider()
    tracer = provider.get_tracer("test")
    event = {"event": "safe", "request_id": "request-1"}

    with tracer.start_as_current_span("operation"):
        result = telemetry.add_trace_context(None, "info", event)

    assert result["event"] == "safe"
    assert result["request_id"] == "request-1"
    assert len(result["trace_id"]) == 32
    assert len(result["span_id"]) == 16
    assert set(result) == {"event", "request_id", "trace_id", "span_id"}