package Acme::PerlMonkify;
use 5.008;
use strict;
use warnings;

our $strict;
our $warnings;
our $VERSION = '0.01';

use LWP::Simple;
use Cache::FileCache ();
use B::Deobfuscate '0.10';

use constant DEBUG => 0;

our ( $start_url, $USERNAME, $START );
BEGIN {
    $start_url = "http://tinymicros.com/pm/index.php?goto=MonkStats&start=1";
    $USERNAME = "usernames";
    $START = "start";
}

BEGIN {
    my $old = \ &B::Deparse::declare_hints;
    no warnings 'redefine';
    *B::Deparse::declare_hints = sub {
        my $r = $old->( @_ );
        no strict 'refs';
        ${__PACKAGE__ . "::$1"} = 1 if $r =~ /^use (warnings|strict)/;
        ${__PACKAGE__ . "::warnings"} = 1 if $^W or ${^WARNING_BITS};
        return $r;
    }
}

sub cached_get {
    my $cache = shift;
    my $start = shift;
    
    my $url;
    ($url = $start_url) =~ s/(?<=start=)\d+/$start/;
    
    my $html = $cache->get( $url );
    return $html if $html;
    
    $html = get( $url );
    $cache->set( $url, $html );
    
    return $html;
}

sub usernames {    
    my $cache = Cache::FileCache->new( { namespace => __PACKAGE__ } );
    
    my $users = $cache->get( $USERNAME ) || {};
    my $start = $cache->get( $START ) || 0;
    
    # Get the next cached page
    my $page = cached_get( $cache, $start );
    
    # Update the start parameter so we'll search farther next time.
    DEBUG and print "$START: $start\n";
    my $new_start = $start + 50;
    $cache->set( $START, $new_start );
    
    # Update the users list
    my @urls = $page =~ m{<tr>(?>(?!<a\s)(?s:.))+<a\s+([^>]+)>(.+)}ig;
    for (my $i = 0; $i < @urls; $i += 2) {
        unless ($urls[$i] =~ m{http://(?:www\.)+perlmonks\.org}) {
            $urls[$i + 1] = undef;
        }
        $urls[$i] = undef;
    }
    my @new_users = grep defined, @urls;
    
    for (@new_users) {
        s((?:\s*</[^>]+>)*\s*$)()mi;
        s/\W/_/g;
    }
      
    @$users{@new_users} = () x @new_users;
    DEBUG and print "\@new_users: " . @new_users . "\n";

    $cache->set( $USERNAME, $users );
    DEBUG and print( "%users: ".(0+keys %$users), "\n" );
    
    return join "\n", keys %$users;
}

sub import {
    shift;
    return if @_;
    
    my $deparse = B::Deparse->new(qw(-p))->coderef2text(
        \&B::Deparse::begin_is_use );
    $deparse =~ s{^\s*if\s*\(\s*\(\s*\(\s*\(\s*\(\s*(\$\w+)\s+eq\s*'strict'
    \s*\)\s*or\s*\(\s*\$\w+\s+eq\s*'integer'\s*\)\s*\)\s*or\s*\(\s*\$\w+\s+eq
    \s*'bytes'\s*\)\s*\)\s*or\s*\(\s*\$\w+\s+eq\s*'warnings'\s*\)\s*\)\s*\)
    \s*{\s*return\s*\(\s*''\s*\)\s*;\s*}\s*^}{
    \$Acme::PerlMonkify::strict = 1 if $1 eq 'strict';
    \$Acme::PerlMonkify::warnings = 1 if $1 eq 'warnings';
    }mx;
    {
        no warnings;
        *B::Deparse::begin_is_use = eval "sub $deparse" or die $@;
    }
    
    open *B::Deobfuscate::DATA, "<", \ usernames();
    require O;
    tie *STDOUT, __PACKAGE__ || die $!;
    O->import( 'Deobfuscate', "-m/${\qr[\A(?=\w*[[:lower:]]\w*)\w+\z]}/" );
}

sub TIEHANDLE { bless \my $stick, shift }
sub PRINT {
    my $src = $_[1];
    
    local *OUT;
    open OUT, ">", $0 or die "Cannot monkify '$0'";
    select OUT;
    $| = 1;

    open STDIN, $0;
    my $octothorpebang = <STDIN>;
    print OUT $octothorpebang if $octothorpebang and $octothorpebang =~ /^\Q#!/;

    print OUT
        +(not ($strict or $warnings)) ? qq[warn "So you didn't use strict? And no warnings? - Expect the Inquisitors\n";] :
        not($strict) ? qq[warn "No strict?! Who do you think you are, [TheDamian]?\n";] :
        not($warnings) ? qq[use strict;\nwarn "I didn't see you use warnings so I turned them on for you and made them fatal errors";\nuse warnings FATAL => 'all'; \# Bwuahaha!\n] : 
        "\# Sit! What a good monk you are! Good boy!\nuse strict;\nuse warnings;\n";

    $src =~ s/\A(?:^sub Cache::[\w:]+;\s*)+//gm;
    print OUT $src;
    close STDERR;
}

1;

__END__