#!/bin/sh


rrdtool graph "$graph.tmp" \
	\
	--imgformat PNG \
	\
	--width "$width" \
	--height "$height" \
	\
	--start end-1d \
	--end now \
	\
	--title 'outdoor temperature' \
	--vertical-label '°C' \
	\
	--units-exponent 0 \
	--units-length "$units_length" \
	\
	--slope-mode \
	--interlaced \
	--alt-y-grid \
	\
	"DEF:temp=$rrd:temp:AVERAGE" \
	"DEF:temp_cf_min=$rrd:temp:MIN" \
	"DEF:temp_cf_max_=$rrd:temp:MAX" \
	\
	'CDEF:temp_cf_max=temp_cf_max_,-1,POP' \
	\
	'VDEF:temp_min=temp_cf_min,MINIMUM' \
	'VDEF:temp_max=temp_cf_max,MAXIMUM' \
	'VDEF:temp_avg=temp,AVERAGE' \
	'VDEF:temp_last=temp,LAST' \
	\
	'CDEF:temp_pos=temp,0,GT,temp,UNKN,IF' \
	'CDEF:temp_neg=temp,0,LE,temp,UNKN,IF' \
	\
	'COMMENT:\s' \
	'COMMENT:\s' \
	'COMMENT:\s' \
	'COMMENT:   Min     Max     Avg     Last\n' \
	'COMMENT:\s' \
	\
	"LINE$line_weight:temp_pos#$today_pos" \
	"LINE$line_weight:temp_neg#$today_neg" \
	\
	'GPRINT:temp_min:%6.1lf' \
	'GPRINT:temp_max:%6.1lf' \
	'GPRINT:temp_avg:%6.1lf' \
	'GPRINT:temp_last:%6.1lf\n' \
	\
	"COMMENT:                                                               `date '+%F %H\:%M\:%S'`" \
	\
	> /dev/null && \
	\
	mv "$graph.tmp" "$graph" || \
	exit 1