#!/usr/bin/env bash

source $(dirname $0)/oref0-bash-common-functions.sh || (echo "ERROR: Failed to run oref0-bash-common-functions.sh. Is oref0 correctly installed?"; exit 1)

usage "$@" <<EOT
Usage: $self <glucose.json> <minutes>
Given a glucose log file, check whether the most recent sample is newer than
the given number of minutes (default 5). If it's fresh, exit with status 0;
otherwise exit with status 1. Either way, output a text description of how
recent the latest sample is.
EOT


GLUCOSE=$1
OLD=${2-5}

TIME_SINCE=$(oref0-dex-time-since $GLUCOSE)

if (( $(bc <<< "$TIME_SINCE >= $OLD") )); then
  echo "CGM Data $TIME_SINCE mins ago is old (>=$OLD)"
  exit 1
else
  echo "CGM Data $TIME_SINCE mins ago is fresh (< $OLD)"
  exit 0
fi