CHECK_ID_check312="3.12"
CHECK_TITLE_check312="Ensure a log metric filter and alarm exist for changes to network gateways (Scored)"
CHECK_SCORED_check312="SCORED" 
CHECK_ALTERNATE_check312="check312"

check312(){
  # "Ensure a log metric filter and alarm exist for changes to network gateways (Scored)"
  CLOUDWATCH_GROUP=$($AWSCLI cloudtrail describe-trails $PROFILE_OPT --region $REGION --query 'trailList[*].CloudWatchLogsLogGroupArn' --output text | tr '	' '
' | awk -F: '{ print $7 }')
  if [[ $CLOUDWATCH_GROUP ]];then
    for group in $CLOUDWATCH_GROUP; do
      CLOUDWATCH_LOGGROUP_REGION=$($AWSCLI cloudtrail describe-trails $PROFILE_OPT --region $REGION --query 'trailList[*].CloudWatchLogsLogGroupArn' --output text | awk -F: '{ print $4 }')
      METRICFILTER_SET=$($AWSCLI logs describe-metric-filters --log-group-name $group $PROFILE_OPT --region $CLOUDWATCH_LOGGROUP_REGION --query 'metricFilters' | grep -E 'CreateCustomerGateway.*DeleteCustomerGateway.*AttachInternetGateway.*CreateInternetGateway.*DeleteInternetGateway.*DetachInternetGateway')
      if [[ $METRICFILTER_SET ]];then
        HAS_ALARM_ASSOCIATED=$($AWSCLI cloudwatch describe-alarms $PROFILE_OPT --region $CLOUDWATCH_LOGGROUP_REGION --query 'MetricAlarms[].MetricName' --output text | awk 'BEGIN {IGNORECASE=1}; /InternetGateway/ || /CustomerGateway/;')
        if [[ $HAS_ALARM_ASSOCIATED ]];then
          textPass "CloudWatch group $group found with metric filters and alarms for changes to network gateways"
        else
          textFail "CloudWatch group $group found with metric filters but no alarms associated"
        fi
      else
        textFail "CloudWatch group $group found but no metric filters or alarms associated"
      fi
    done
  else
    textFail "No CloudWatch group found for CloudTrail events"
  fi
}