import pytest

from app.config import Config
from app.services.simulation_manager import SimulationManager


def test_simulation_manager_uses_injected_entity_reader_factory():
    sentinel = object()
    calls = []

    def factory(graph_id):
        calls.append(graph_id)
        return sentinel

    manager = SimulationManager(entity_reader_factory=factory)
    assert manager.create_entity_reader("graph-local") is sentinel
    assert calls == ["graph-local"]


def test_local_backend_refuses_unscoped_zep_reader_fallback(monkeypatch, tmp_path):
    monkeypatch.setattr(Config, "MEMORY_BACKEND", "local")
    monkeypatch.setattr(SimulationManager, "SIMULATION_DATA_DIR", str(tmp_path))

    manager = SimulationManager()

    with pytest.raises(ValueError, match="local_entity_reader_factory_required"):
        manager.create_entity_reader("graph-local")