Watch your usage

import calendar
import sys
from datetime import datetime, timezone

from namu import Namu

usage = Namu().usage()
used, limit = usage["month_audio_seconds_used"], usage["month_audio_seconds_limit"]

now = datetime.now(timezone.utc)
days = calendar.monthrange(now.year, now.month)[1]
elapsed = (now.day - 1) + now.hour / 24 or 0.01
projected = used / elapsed * days

print(f"Used {used / 60:.1f} of {limit / 60:.0f} minutes; on pace for {projected / 60:.0f} this month.")
if used >= 0.8 * limit or projected > limit:
    print("Warning: the allowance may run out before the 1st.")
    sys.exit(1)   # a failing job is an easy alert in cron and CI

0 7 * * * NAMU_API_KEY=namu_sk_... /usr/bin/python3 /srv/app/check_usage.py || /srv/app/notify.sh "Namu usage"