#!/bin/bash

logfile=/root/logs/monitoring.log
log_identifier="[MON]"
log() {
  echo -e $@ | ts "[%Y-%m-%d %H:%M:%S] $log_identifier" >> $logfile
}
log_echo() {
  echo -e $@ | ts "[%Y-%m-%d %H:%M:%S] $log_identifier" | tee -a $logfile
}

set -o allexport
source /root/scripts/.monitoring_env
set +o allexport


problems=0

log "Starting monitoring run"

for ssh_host in $SSH_MONITORING
do
  if [[ $(nc -w 2 ${ssh_host//:/ } <<< "\0" ) =~ "OpenSSH" ]] ; then
    log "[SSH] [OK] ${ssh_host} is reachable"
  else
    # TODO: Rate limit fail messages, also add is back up message
    log_echo "[SSH] [FAIL] ${ssh_host} not reachable"
    problems=1
  fi
done

# TODO: HTTP Status Code 200 Monitoring
for http_host in $HTTP_MONITORING
do
  status_code=$(curl --write-out %{http_code} --silent --output /dev/null $http_host)
  if [[ "$status_code" -eq 200 ]] ; then
    log "[WEB] [OK] ${http_host}"
  else
    # TODO: Rate limit fail messages, also add is back up message
    log_echo "[WEB] [FAIL] ${http_host} status code is ${status_code}"
    problems=1
  fi
done


if [[ "$problems" -eq "0" ]]; then
  log "Monitoring Run Successful"
else
  log_echo "Monitoring Run Failed"
fi