#!/usr/bin/env sh

set -e

: << =cut

=head1 NAME

languagetool_check - Monitor checks made over languagetool

=head1 APPLICABLE SYSTEMS

LanguageTool server

=head1 CONFIGURATION

Plugin has to run as root, uses journalctl and presumes that languagetool 
is running as languagetool.service systemd service. You may specify the 
languages (short codes) which get checked. 

 languages        - Languages to include in graph
 interval_minutes - Minutes to include in journalctl log

 [languagetool_checks]
 user root
 env.languages de fr it en es
 env.interval_minutes 5

=head1 AUTHOR

Copyright (C) 2025 Sebastian L. (https://momou.ch)

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=manual
 #%# capabilities=autoconf

=cut

. "$MUNIN_LIBDIR/plugins/plugin.sh"

languages="${languages:-en}"
interval_minutes=${interval_minutes:-5}

case $1 in
	autoconf)
		if [ -x "$(command -v journalctl)" ]; then
			if [ "$(systemctl is-enabled languagetool)" != "enabled" ]; then
				echo "no (languagetool.service not enabled)" && exit 1
			fi
		else
			echo "no (journalctl not found)" && exit 1
		fi
	;;

    config)
        echo "graph_title Checks on languagetool"
        echo "graph_category appserver"
        echo "graph_vlabel languagetool checks"
        echo "graph_info Current checks on languagetool"
        echo "graph_args --base 1000 --lower-limit 0"
        echo "checks.label checks"
        echo "checks.info Active checks on languagetool"
        echo "checks.min 0"
		for language in $languages; do
			echo "$language.label $language"
			echo "$language.info Checks for language $language"
        		echo "$language.min 0"
		done
        exit 0
    ;;
esac

journalctl_log=$(journalctl --since "$interval_minutes min ago" -u languagetool)
if [ "$(echo "$journalctl_log" | grep -c "Check done:")" = "0" ]; then
	echo "checks.value 0"
	for language in $languages; do
		echo "$language.value 0"
	done
elif journalctl_log=$(echo "$journalctl_log" | grep "Check done:"); then
	echo "checks.value $(echo "$journalctl_log" | grep -c "Check done:")"
	for language in $languages; do
		value=$(echo "$journalctl_log" | grep -E "Check done: [0-9]+ chars, $language" | wc -l)
		echo "$language.value $value"
	done
else
	echo "checks.value U"
	for language in $languages; do
		echo "$language.value U"
	done
fi