#!/usr/bin/perl -w

use warnings;
use strict;
use File::Which;
use Getopt::Long;
use JSON;

my $fping = which('fping');

unless ($fping){
  die "ZBX_NOTSUPPOTED\n";
}

my $info       = 'all';
my $pretty     = 0;
my @valid_info = qw(all respond latency loss);
my $host       = $ARGV[0];

GetOptions(
  'info=s' => \$info,
  'pretty' => \$pretty
);

unless (grep { $info eq $_ } @valid_info){
  die "Usage: $0 [--info=<respond|latency|loss>] host\n";
}

my $ping = qx($fping -c 5 -p 10 -q $host 2>&1);
# Output looks like 10.29.254.2 : xmt/rcv/%loss = 5/5/0%, min/avg/max = 1.42/1.65/1.90
if ($ping =~ m|^$host : xmt/rcv/%loss = 5/(\d)/(\d+(?:\.\d+)?)%(?:, min/avg/max = (?:\d+(?:\.\d+)?)/(\d+(\.\d+))/(?:\d+(?:\.\d+)?))?$|){
  my $stat = {
    respond => ($1 > 0) ? 1 : 0,
    loss    => $2 + 0,
    latency => (defined $3) ? $3 / 1000 : 0
  };
  if ($info ne 'all'){
    print $stat->{$info} . "\n";
  } else {
    print to_json($stat, { pretty => $pretty }) . "\n";
  }
} else {
  die "ZBX_NOTSUPPOTED\n";
}
exit 0;