def minutes_to_str(minutes: int) -> str:
    sign = "-" if minutes < 0 else ""
    minutes = abs(minutes)
    return f"{sign}{minutes // 60}h{minutes % 60:02d}"


_REFERENCE_MINUTES = {
    "WORK": 465,
    "TT": 465,
    "FORMATION": 465,
    "GARDE": 600,
    "ASTREINTE": 0,
    "RTT": 0,
    "CONGE": 0,
    "MALADE": 0,
    "FERIE": 0,
}


def work_minutes_reference(day_type: str) -> int:
    return _REFERENCE_MINUTES.get(day_type, 465)


def week_balance_minutes(actual_minutes: int, reference_minutes: int) -> int:
    return actual_minutes - reference_minutes


import statistics as _stats


def monthly_stats(entries: list) -> dict:
    """
    Calcule médiane journalière et médiane hebdomadaire (semaines ISO)
    pour un groupe d'entrées. Les absences (total_minutes=0) sont incluses.
    """
    if not entries:
        return {"median_daily_min": 0, "median_weekly_min": 0}

    daily = [e.total_minutes() for e in entries]
    median_daily = int(_stats.median(daily))

    weekly: dict[tuple, int] = {}
    for e in entries:
        key = e.date.isocalendar()[:2]  # (year, isoweek)
        weekly[key] = weekly.get(key, 0) + e.total_minutes()

    median_weekly = int(_stats.median(weekly.values()))

    return {"median_daily_min": median_daily, "median_weekly_min": median_weekly}


def count_day_types(entries: list) -> dict[str, int]:
    """Retourne un dict {day_type: count} pour une liste d'entrées, sans les zéros."""
    counts: dict[str, int] = {}
    for entry in entries:
        counts[entry.day_type] = counts.get(entry.day_type, 0) + 1
    return counts