from __future__ import annotations


def to_ha_condition(icon: str, time_of_day: str | None) -> str:
    if icon == "d":
        return "sunny" if time_of_day == "day" else "clear-night"
    mapping = {
        "c": "cloudy",
        "c_s": "snowy",
        "c_r": "rainy",
        "c_rs": "snowy-rainy",
        "d_c": "partlycloudy",
    }
    return mapping.get(icon, "cloudy")