"""Business telemetry helpers (no real Collector required)."""

from __future__ import annotations

import pytest
from opentelemetry import trace

from app.core.business_telemetry import business_span
from app.core.config import settings


class TestBusinessSpan:
    def test_disabled_is_noop(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setattr(settings, "otel_enabled", False)
        with business_span("memoir.phase1", user_id="u1") as span:
            assert span == trace.INVALID_SPAN

    def test_filters_high_cardinality_attrs(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setattr(settings, "otel_enabled", True)
        from opentelemetry.sdk.trace import TracerProvider
        from opentelemetry.sdk.trace.export import SimpleSpanProcessor
        from opentelemetry.sdk.trace.export.in_memory_span_exporter import (
            InMemorySpanExporter,
        )

        exporter = InMemorySpanExporter()
        provider = TracerProvider()
        provider.add_span_processor(SimpleSpanProcessor(exporter))
        monkeypatch.setattr(
            "app.core.business_telemetry.get_tracer",
            lambda _name: provider.get_tracer("test"),
        )

        with business_span(
            "memoir.phase2",
            user_id="user-123",
            chapter_category="childhood",
        ):
            pass

        spans = exporter.get_finished_spans()
        assert spans
        attrs = dict(spans[0].attributes or {})
        assert attrs.get("business.chapter_category") == "childhood"
        assert "business.user_id" not in attrs

    def test_enabled_yields_span(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setattr(settings, "otel_enabled", True)
        from opentelemetry.sdk.trace import TracerProvider
        from opentelemetry.sdk.trace.export import SimpleSpanProcessor
        from opentelemetry.sdk.trace.export.in_memory_span_exporter import (
            InMemorySpanExporter,
        )

        exporter = InMemorySpanExporter()
        provider = TracerProvider()
        provider.add_span_processor(SimpleSpanProcessor(exporter))
        monkeypatch.setattr(
            "app.core.business_telemetry.get_tracer",
            lambda _name: provider.get_tracer("test"),
        )

        with business_span("conversation.ws.process_turn") as span:
            assert span.is_recording()