#!/bin/sh
echo "Content-type: image/png"
echo
D=/var/log/arexxd

current ()
{
	Z=$(rrdtool fetch $1 AVERAGE -s-5min -r900 | grep : | grep -v nan | tail -1 | cut -d ' ' -f 2)
	if [ -z "$Z" ] ; then
		echo -n "---"
	else
		printf "%5.1f" "$Z"
	fi
}

exec rrdtool graph - \
	--start 'now-12h' \
	--end 'now' \
	--title "Temperature" \
	-w 720 -h 600 \
	-x MINUTE:10:HOUR:1:HOUR:2:0:%H:%M \
	-y 5:1 \
	--right-axis 1:0 --right-axis-format "%3.0lf" \
	--units-exponent 0 --lower-limit -20 --upper-limit 40 --rigid \
	--legend-position east \
	--pango-markup \
	DEF:c=$D/sensor-catarium.rrd:temp:AVERAGE \
	DEF:u=$D/sensor-ursarium.rrd:temp:AVERAGE \
	DEF:b=$D/sensor-balcony.rrd:temp:AVERAGE \
	DEF:o=$D/sensor-outside.rrd:temp:AVERAGE \
	DEF:t=$D/sensor-aquarium.rrd:temp:AVERAGE \
	'AREA:c#cc7777' \
	'AREA:u#7777cc' \
	'AREA:b#cc77cc' \
	'AREA:o#77cc77' \
	'LINE2:c#cc0000:Catarium\n' \
	'LINE2:u#0000cc:Ursarium\n' \
	'LINE2:t#00cccc:Aquarium\n' \
	'LINE2:b#cc00cc:Balcony\n' \
	'LINE2:o#00cc00:Outside\n' \
	'HRULE:0#0000ff' \
	'COMMENT:\s' \
	'COMMENT:\s' \
	'COMMENT:\s' \
	'COMMENT:<span foreground="#cc0000" font-size="x-large" weight="bold">'"$(current $D/sensor-catarium.rrd)"' °C</span>\l' \
	'COMMENT:\s' \
	'COMMENT:<span foreground="#0000cc" font-size="x-large" weight="bold">'"$(current $D/sensor-ursarium.rrd)"' °C</span>\l' \
	'COMMENT:\s' \
	'COMMENT:<span foreground="#00cccc" font-size="x-large" weight="bold">'"$(current $D/sensor-aquarium.rrd)"' °C</span>\l' \
	'COMMENT:\s' \
	'COMMENT:<span foreground="#cc00cc" font-size="x-large" weight="bold">'"$(current $D/sensor-balcony.rrd)"' °C</span>\l' \
	'COMMENT:\s' \
	'COMMENT:<span foreground="#00cc00" font-size="x-large" weight="bold">'"$(current $D/sensor-outside.rrd)"' °C</span>\l' \