from pigway_frame_flow.models import Power


def test_observer_records_only_changes(service, monkeypatch):
    driver = service.registry.get("living-room")
    baseline = driver.device()
    monkeypatch.setattr(driver, "device", lambda: baseline)
    service.device_observer.tick()
    before = len(service.db.all("SELECT * FROM events"))
    service.device_observer.tick()
    assert len(service.db.all("SELECT * FROM events")) == before
    changed = baseline.model_copy(
        update={"status": "offline", "power": Power(battery_percent=10, charging=False)}
    )
    monkeypatch.setattr(driver, "device", lambda: changed)
    service.device_observer.tick()
    assert {r["event_type"] for r in service.db.all("SELECT * FROM events")} >= {
        "device.offline",
        "device.low_battery",
    }


def test_cloud_failure_is_not_device_offline(service, monkeypatch):
    driver = service.registry.get("living-room")

    def fail():
        raise RuntimeError("cloud failure")

    monkeypatch.setattr(driver, "device", fail)
    service.device_observer.tick()
    assert not service.db.all("SELECT * FROM events")