#!/bin/sh

message()
{
STATE="$1"
echo -e "Subject: 41hpa piano alarm: ${STATE} \n\nPiano alarm at 41hpa says ${STATE}.\n" | /usr/sbin/sendmail -f "Piano Alarm <piano-alarm@ourano.org>" monitoring@madingley.org
}

TL=17000
TH=22000

HL=400
HH=700

T=`sensor.pl -t -i`
H=`sensor.pl -h -i`
TANK="$(mosquitto_sub -h 10.32.136.1 -p 1883 -t stat/music_room_humidifier/var3  -W 1 -C 1 )"

BAD=0

M=""

if [ -z "$T" ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}failed to read temperature"
	BAD=1
fi

if [ -z "$H" ]; then 
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}failed to read humidity"
	BAD=1
fi

if [ "$T" -lt "$TL" ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}temperature too low $T<$TL"
	BAD=1
fi
if [ "$T" -gt "$TH" ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}temperature too high $T>$TH"
	BAD=1
fi

if [ "$H" -lt "$HL" ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}air too dry $H<$HL"
	BAD=1
fi

if [ "$H" -gt "$HH" ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}air too wet $H>$HH"
	BAD=1
fi

if [ "$1" == "test" ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}test"
        BAD=1
fi

if [ $TANK -eq 0 ]; then
	if [ ! -z "$M" ]; then
		M="${M}, "
	fi
	M="${M}humidifier tank is empty"
        BAD=1
fi

if [ "$BAD" -eq 1 ]; then
	message "$M"
fi

echo "piano_alarm T=$T H=$H TANK=$TANK M=$M"
logger "piano_alarm T=$T H=$H TANK=$TANK M=$M"