from __future__ import annotations

from src.knowledge_adapter import generate_single_gear_variants


def test_single_gear_variants_are_solved_and_keep_baseline_immutable() -> None:
    result = generate_single_gear_variants()
    assert result["enabled"] is True
    assert result["candidateCount"] == 13
    assert result["baseline"] == {
        "z_sun": 20,
        "z_planet": 55,
        "z_ring": 130,
        "planet_count": 3,
        "module_mm": 0.5,
    }
    assert len({candidate["ratio"] for candidate in result["candidates"]}) == 13
    for candidate in result["candidates"]:
        parameters = candidate["parameters"]
        assert parameters["zRing"] == parameters["zSun"] + 2 * parameters["zPlanet"]
        assert candidate["constraints"]["equalSpacing"] is True
        assert candidate["constraints"]["planetClearance"] is True
        assert candidate["constraints"]["kinematicResidual"] < 1e-10
        assert candidate["speeds"]["ring"] == 0.0
        assert candidate["cadGenerated"] is False