#!/bin/sh
# script to check chilled water temperature status and send out sms messages

# log file location
logdir=MAINPROGROOT/log

# sms script and number directory
DISPATCH=MAINPROGROOT/scripts/dispatchsms.sh
smsdir=MAINPROGROOT/sms

# Temperature switch tresholds for set/reset waring in multiples of 1/100 C
WARNTEMP=850
RETURNTEMP=800

# warning file. This file gets created when the chilled water warning state
# has been reached. It contains the number of calls it has been checked.
warningfile=$smsdir/chillwarning

# read latest temperature at monitoring location (AHU1 and AHU2)
b=($(tail -n 1 $logdir/heat_AHU2.log))
b1=($(tail -n 1 $logdir/heat_AHU1.log))
temptimes100=$(echo ${b1[6]} |sed -e "s%\.%%")

if [ $temptimes100 -gt $WARNTEMP ]; then 
    if [ -e $warningfile ]; then
	# we have a warning file already. increase its visit count
	lst=$(cat $warningfile); lst=$(($lst+1))
	echo $lst >$warningfile
	# Send a reminder every 15 minutes if situation persists
	if (( $(($lst%15)) == 0 )); then
	    $DISPATCH "AHU WARNING REMINDER\nSituation persists for $lst minutes.\nCHWS at ${b1[6]}C\nCHWR at ${b1[5]}C\nAHU1 power ${b1[4]}kW\nAHU2 power ${b[4]}kW"
	fi
    else
	# This is a fresh warning. Create a warning file and send an SMS
	echo "0" >$warningfile
	$DISPATCH "CQT AHU WARNING:\nChilled water supply temp exceeds 8.5C.\nCHWS at ${b1[6]}C\nCHWR at ${b1[5]}C\nAHU1 power ${b1[4]}kW\nAHU2 power ${b[4]}kW"
    fi
elif [ $temptimes100 -lt $RETURNTEMP ]; then 
    if [ -e $warningfile ]; then
	# We have recovered. remove warning file, send ack sms
	rm -f $warningfile
	$DISPATCH "CQT AHU chilled water back to normal.\nCHWS at ${b1[6]}C\nCHWR at ${b1[5]}C\nAHU1 power ${b1[4]}kW\nAHU2 power ${b[4]}kW"
    fi
fi