printf "Content-Type: text/plain\n\n"

input=$(cat /dev/stdin)
token=1493641835:AAGR7kLksUIjcrM-PXiVEM_yxLGqLGRWKZA

cmd=$(jq -r '.message.text' <<< $input)
chat=$(jq -r '.message.chat.id' <<< $input)

sendmsg(){
	curl -sX POST "https://api.telegram.org/bot$token/sendMessage" \
		-d "chat_id=$chat" -d "parse_mode=markdownv2" -d "text=$1"
}

alive(){
	sendmsg "Alive and well\!"
}

stat(){
	total=$(grep MemTotal /proc/meminfo | awk '{print $2}')
	avail=$(grep MemAvailable /proc/meminfo | awk '{print $2}')
	used=$(bc <<< "$total-$avail")
	sendmsg "I am using $used KB of memory\."
}

case "$cmd" in
	/alive*)	alive ;;
	/stat*)		stat ;;
esac