#!/usr/bin/perl
use strict;
use warnings;

use File::Slurp;
use autodie;

use lib '.';
use Protocol;

my $queue = "queue";

my $path = shift @ARGV;
die "Usage: $0 queue/IMEI\n" unless $path;


my $imei;
if ( $path =~ m{$queue/(\w+)/} ) {
	$imei = $1;
} else {
	die "can't find IMEI in $path\n";
}

my $raw;

if ( $ARGV[0] =~ m/interval/ ) {
	# heartbeat interval
	my $interval = $ARGV[1] || 300;
	print "set heartbeat interval to $interval s\n";
	$raw = write_parameter_frame( "\x21" => "\x04" . pack('l',$interval) );

} else {
	print "read_parameter_frame\n";
	$raw = read_parameter_frame( "\x00" => "\x04\xe8\x03\x00\x00",
	"\x21",
	"\x44",
	"\x12",
	"\x14",
	"\x1a\x21\x22\x23\x24\x33\x34\x35\x3b" );
}

# temporary store to done
my $t = time();
write_file "$queue/$imei/.todo.$t", $raw;
# atomic rename to ensure that file is complete

rename "$queue/$imei/.todo.$t", "$queue/$imei/.pending/$t";