from datetime import datetime
from typing import Any

_DAY_INDEX = {
    "mon": 0,
    "tue": 1,
    "wed": 2,
    "thu": 3,
    "fri": 4,
    "sat": 5,
    "sun": 6,
}


def _parse_hhmm(value: str) -> tuple[int, int]:
    hour_text, minute_text = value.split(":", 1)
    return int(hour_text), int(minute_text)


def _minutes_of_day(moment: datetime) -> int:
    return moment.hour * 60 + moment.minute


def is_restriction_active(windows: list[dict[str, Any]], moment: datetime) -> bool:
    if not windows:
        return False

    weekday = moment.weekday()
    now_minutes = _minutes_of_day(moment)

    for window in windows:
        day = window.get("day_of_week")
        start = str(window.get("start", "00:00"))
        end = str(window.get("end", "00:00"))
        if day not in _DAY_INDEX:
            continue

        start_h, start_m = _parse_hhmm(start)
        end_h, end_m = _parse_hhmm(end)
        start_minutes = start_h * 60 + start_m
        end_minutes = end_h * 60 + end_m
        window_day = _DAY_INDEX[day]

        if start_minutes <= end_minutes:
            if weekday == window_day and start_minutes <= now_minutes <= end_minutes:
                return True
            continue

        # Overnight window: e.g. 22:00 -> 02:00
        if weekday == window_day and now_minutes >= start_minutes:
            return True
        if weekday == (window_day + 1) % 7 and now_minutes <= end_minutes:
            return True

    return False