#!/usr/bin/perl

use strict;
use warnings;
use URI::URL;
use LWP::Simple qw/get/;

my $TOP = "http://apod.nasa.gov/apod/";
my $IMGPATH = 'image/\d{4}/\w+.(gif|jpg|jpeg|png)';
my @timearray = gmtime();
my $time = sprintf "%04d%02d%02d", ($timearray[5]+1900), ($timearray[4]+1), ($timearray[3]);

my $content = get $TOP or die "Cannot get APOD Page\n";
my ($imgurl) = $content =~ m!($IMGPATH)!i;
$imgurl = url($imgurl,$TOP)->abs;

my $picture = get $imgurl or die "Cannot grab image: $!\n";

open(OUT, ">apod$time\.$2") or die "Cannot write to file: $!\n";
binmode(OUT);
print OUT $picture;
close OUT;