#!/usr/bin/perl

use warnings;
use strict;
use POSIX qw(strftime);
use Time::Piece;
use Cwd qw( abs_path );
use File::Basename;
use File::Basename qw( dirname );
use LWP::Simple;
use Parallel::ForkManager;
use Date::Calc qw (Delta_Days);
use Data::Dumper;

my $pm = new Parallel::ForkManager(5);
my $domains = dirname(abs_path($0)).'/domains.txt';
my %domainList;
my $flag = 0;
my $date = strftime "%Y-%m-%d", localtime;
my %month = ( 'jan'=>'01','feb'=>'02','mar'=>'03','apr'=>'04','may'=>'05','jun'=>'06','jul'=>'07','aug'=>'08','sep'=>'09','oct'=>'10','nov'=>'11','dec'=>'12' );

open my $fh, $domains or die "CRIT: Unable to open $domains: $!\n"; 

while( my $domainName = <$fh> ) { 
    chomp $domainName;
    print $domainName."\n";
    $pm->start and next;
    my $expDate = `jwhois -n -h whois.crsnic.net $domainName | grep Expiration | awk '{print \$3}'`;
    print $expDate;
    my $diff = &dateDiff($expDate);

    if ($diff < 28 and $diff > 14) { $flag = 1; }
    elsif ($diff <= 14) { $flag = 2; }
    
    $domainList{$domainName} = $diff;
    exit($diff);
    $pm->finish;
}

close $fh;
$pm->wait_all_children;

print Dumper(\%domainList);

if ($flag == 2){
    my $status = "CRIT: There are Domains Expiring Soon.  Please Resolve";
    print "$status\n";
    for my $key (sort(keys(%domainList))) { print "$domainList{$key}\t--- $key\n"; }
    exit 2;
}

elsif ($flag == 1){
    my $status = "WARN: There are Domains Expiring within a month.  Please Resolve";
    print "$status\n";
    for my $key (sort(keys(%domainList))) { print "$domainList{$key}\t--- $key\n"; }
    exit 1;
}

else {
    my $status = "OK: Domains Look good";
    print "$status\n";
    for my $key (sort(keys(%domainList))) { print "$domainList{$key}\t--- $key\n"; }
    exit 0;
}

sub dateDiff {
    my $ex = shift;
    chomp $ex;
    my($day,$mon,$year) = split("-",$ex);
    my ($tyear,$tmon,$tday) = split("-",$date);
    print "$tyear, $tmon, $tday, $year, $month{$mon}, $day\n";
    my $remaining_days = Delta_Days($tyear, $tmon, $tday, $year, $month{$mon}, $day);
    return $remaining_days;
}