import core.elevation as elev


class _FakeResponse:
    def __init__(self, payload):
        self._payload = payload

    def raise_for_status(self):
        return None

    def json(self):
        return self._payload


class _FakeClient:
    def __init__(self, **kwargs):
        self.kwargs = kwargs

    def __enter__(self):
        return self

    def __exit__(self, *args):
        return False

    def get(self, url, params=None):
        return _FakeResponse({"elevation": [152.0]})


def test_probe_elevation_api_ok(monkeypatch):
    monkeypatch.setattr(elev, "_probe_checked_at", 0.0)
    monkeypatch.setattr(elev.httpx, "Client", _FakeClient)

    status = elev.probe_elevation_api(force=True)

    assert status["ok"] is True
    assert status["error"] is None


def test_fetch_skips_when_unreachable(monkeypatch):
    monkeypatch.setattr(
        elev,
        "probe_elevation_api",
        lambda force=False: {"ok": False, "url": elev.ELEVATION_API_URL, "error": "down"},
    )

    vals = elev.fetch_elevations_batch([55.75], [37.62])

    assert vals == [None]


def test_build_profile_reports_unreachable(monkeypatch):
    monkeypatch.setattr(
        elev,
        "probe_elevation_api",
        lambda force=False: {"ok": False, "url": elev.ELEVATION_API_URL, "error": "down"},
    )

    profile = elev.build_elevation_profile(
        [{"lat": 55.75, "lon": 37.62}, {"lat": 55.76, "lon": 37.63}],
        10,
    )

    assert profile["points"] == []
    assert "unreachable" in profile["api_error"]