#!/bin/sh

set -eu

SCHEDULE="${SCHEDULE:-* * * * *}"
CRON_LOG_LEVEL="${CRON_LOG_LEVEL:-2}"
PUID="${PUID:-1000}"
PGID="${PGID:-1000}"
CRON_FILE="/etc/crontabs/root"

# Create or update group with specified PGID
if grep -q "^nsupdate:" /etc/group 2>/dev/null; then
  delgroup nsupdate 2>/dev/null || true
fi
addgroup -g "${PGID}" nsupdate 2>/dev/null || true

# Create or update user with specified PUID
if grep -q "^nsupdate:" /etc/passwd 2>/dev/null; then
  deluser nsupdate 2>/dev/null || true
fi
adduser -u "${PUID}" -G nsupdate -s /sbin/nologin -D nsupdate 2>/dev/null || true

# Set ownership of volumes
chown -R "${PUID}:${PGID}" /config /log

# Ensure crontabs directory exists
mkdir -p "$(dirname "${CRON_FILE}")"

# Write cron job to run as the specified user (by UID:GID)
printf '%s su -s /bin/sh %s:%s -c /usr/local/bin/nsupdate.sh\n' "${SCHEDULE}" "${PUID}" "${PGID}" > "${CRON_FILE}"
chmod 600 "${CRON_FILE}"

if [ "$#" -gt 0 ]; then
	if [ "$1" = "crond" ]; then
		shift
		exec crond -l "${CRON_LOG_LEVEL}" "$@"
	fi

	exec "$@"
fi

exec crond -l "${CRON_LOG_LEVEL}" -f