#!/bin/bash

DATE=$1
WARN=$2
CRIT=$3

NOW=$(date +%s)
DUE=$(date -d "$DATE" +%s)

DELTA=$((DUE - NOW))
DAYS=$((DELTA / 86400))

if [ "$DAYS" -le "$CRIT" ]; then
  echo "CRITICAL - échéance imminente"
  exit 2
fi

if [ "$DAYS" -le "$WARN" ]; then
  echo "WARNING - échéance proche"
  exit 1
fi

echo "OK - sous contrôle"
exit 0