#!/bin/bash

TMPFILE=/tmp/light_state
touch $TMPFILE
LIGHT_STATE=$(cat $TMPFILE)
[ -z "$LIGHT_STATE" ] && LIGHT_STATE=0

if [ -z "$1" ]; then
	STATE_0="a\x00\x03\x00\x00\x00;000000000000000000"
	STATE_1="a\x00\x03\xff\xff\xff;255255255255255255"
	STATE_2="n\x00\x02\x01\x00;170000070150000050"

	LIGHT_STATE=$(( $LIGHT_STATE+1 ))
	case $LIGHT_STATE in
		0)
		  STATE=$STATE_0
		  ;;
		1)
		  STATE=$STATE_1
		  ;;
		2)
		  STATE=$STATE_2
		  ;;
		*)
		  STATE=$STATE_0
		  LIGHT_STATE=0
		  ;;
	esac
else
	COLOR_A="$(echo $1 | sed "s/\(..\)\(..\)\(..\)/\\\x\2\\\x\1\\\x\3/g")"
	COLOR_B="$(echo $1 | while read -N2 code; do printf "%03d" $((16#$code)); done)"
	STATE="a\x00\x03$COLOR_A;$COLOR_B$COLOR_B"
fi

for i in {1..5}; do
	echo -en "$(echo "$STATE" | cut -d";" -f1)" > /dev/udp/172.23.92.15/49152 &
	echo -en "$(echo "$STATE" | cut -d";" -f2)" > /dev/udp/172.23.92.16/31302 &

	sleep .01
done

echo $LIGHT_STATE > $TMPFILE