#!/bin/sh
# -*- sh -*-

: << =cut

=head1 NAME

usb-wde1 -  Munin plugin to report usb-wde1 temperature and humidity data

=head1 CONFIGURATION
 The plugin offers two modes: temperature and humidity graphing.

 Symlink usb-wde1_ as "usb-wde1_temperature" and/or "usb-wde1_humidity".

=head2 EXAMPLE CONFIGURATION

 [usb-wde1_*]
  env.logfile /tmp/usb-wde1-last
  env.host_name House
  env.sensors 0 1 7
  env.sensor0 Living room
  env.sensor1 Kitchen
  env.sensor7 Outside

 Warning/critical values for all sensors:
  env.warning 10
  env.critical 5

 Warning/critical values for single sensors:
  env.sensor7_warning 40
  env.sensor7_critical 50

=head1 AUTHOR

Christian Weiske <cweiske@cweiske.de>

=head1 LICENSE

AGPL
http://www.gnu.org/licenses/agpl.html

=head1 MAGIC MARKERS

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

=cut

. ${MUNIN_LIBDIR:=/usr/share/munin}/plugins/plugin.sh

TYPE=`basename $0 | sed 's/^.*_//g'`

if [ "$1" = "autoconf" ]; then
    if [ ! -r "$logfile" ]; then
        echo "no (Logfile \"$logfile\" does not exist)"
    elif [ "$TYPE" != "temperature" -a "$TYPE" != "humidity" ]; then
        echo "no (Type \"$TYPE\" not supported, try \"./usb-wde1_ suggest\")"
    else
        echo yes
    fi
    exit 0

elif [ "$1" = "suggest" ]; then
    echo temperature
    echo humidity
    exit 0
fi

###############
#load variables
###############

# Sensors to display
if [ "$sensors" = "" ]; then
    sensors="0 1 2 3 4 5 6 7"
fi
# Sensor names
for i in $sensors; do
    code="sensor$i=\${sensor$i:=Sensor $i}"
    eval $code
done


if [ "$1" = "config" ]; then
    if [ "$host_name" != "" ]; then
        echo "host_name $host_name"
    fi
    if [ "$TYPE" = "temperature" ]; then
        echo 'graph_title Temperature'
        #echo 'graph_args --base 1000 --lower-limit -30 --upper-limit 60'
        echo 'graph_args --base 1000'
        echo 'graph_vlabel Temperature'
        echo 'graph_info Shows the temperature of different thermometers'
    else
        echo 'graph_title Humidity'
        #echo 'graph_args --base 1000 --lower-limit 0 --upper-limit 100'
        echo 'graph_args --base 1000'
        echo 'graph_vlabel Humidity'
        echo 'graph_info Shows the air humidity of different thermometers (in %)'
    fi
    echo 'graph_scale no'
    echo 'graph_category sensors'

    for i in $sensors; do
        eval "name=\$sensor$i"
        echo "sensor$i.label $name"
        print_warning "sensor$i"
        print_critical "sensor$i"
    done

    exit 0
fi

#Beispielausgabe USB-WDE1:
# $1;1;;13,8;22,7;22,6;17,8;22,2;21,2;22,9;;59;35;38;49;38;40;35;;;;;;;0
# Doku des Formats in 92030_USB_WDE1_V1.0_UM.pdf bei elv.de verfügbar
# Format ist "Logview openformat"
# http://www.logview.info/cms/d_formatbeschreibung.phtml


#split by semicolons
OLDIFS="$IFS"
IFS=";"
read -r sign state timestamp\
    t0 t1 t2 t3 t4 t5 t6 t7\
    h0 h1 h2 h3 h4 h5 h6 h7\
    tc hc ws ns rain checksum\
    < "$logfile"
IFS=$OLDIFS

if [ "$sign" != '$1' ]; then
    echo Log line does not begin with \$1
    exit 2
fi

curdate=`date +%s`
if [ "$timestamp" -lt `expr $curdate - 600` ]; then
    #timestamp is too old, data are too old
    exit
fi


if [ "$TYPE" = "temperature" ]; then
    varprefix=t
else
    varprefix=h
fi


for i in $sensors; do
    eval "value=\$$varprefix$i"
    value=`echo $value|sed s/,/./`
    echo "sensor$i.value $value"
done