from scoliosis_arcs import chaklin_degree

def build_scoliosis_description(arc_infos):
    if not arc_infos:
        return "Признаков сколиоза не выявлено."
    lines = []
    for i, a in enumerate(sorted(arc_infos, key=lambda x: x["cobb_deg"], reverse=True), start=1):
        degree = chaklin_degree(a["cobb_deg"])
        lines.append(
            f"Дуга {i}: {a['direction']}, уровни {a['upper_end']}-{a['lower_end']}, "
            f"вершина ~ {a['apex_label']}, Cobb={a['cobb_deg']:.1f}°, степень={degree}."
        )
    return " ".join(lines)