#!/bin/bash

set -e

fail () { echo >&2 "$0: error: $*"; exit 1; }

if [ $# != 2 ]; then cat >&2 <<END; exit 1; fi
 usage:
  ./reprogram /dev/ttyS0 LOCO|FILENAME
  where LOCO means ./LOCO.cv-s
  and FILENAME must contain a slash
END

port="$1"; shift
filename="$1"; shift

case "$filename" in
*/*)	;;
*)	filename="$filename.cv-s"
	make "$filename"
	;;
esac
exec <"$filename"

while read cv value; do
	case "$cv" in
	addr)
		[ x$addr = x ] || fail 'addr twice'
		addr=$(( $value + 0 ))
		;;
	[0-9]*)
		cv=$(( $cv + 0 ))
		value=$(( $value + 0 ))
		cvlist="$cvlist $cv=$value"
		;;
	'#'*|'')
		;;
	*)
		fail "invalid syntax: $cv $value"
		;;
	esac
done

echo "Factory reset"
./factory-reset-svc "$port"

echo "Setting address to $addr"
./program-cv-svc "$port" 1 $addr

for cvv in $cvlist; do
	sleep 1
	cv=${cvv%=*}
	value=${cvv#*=}
	echo "Setting CV $cv = $value"
	./program-cv "$port" $addr $cv $value
done