#!/usr/bin/env perl
## Copyright © 2010 by Daniel Friesel <derf@finalrewind.org>
## License: WTFPL <http://sam.zoy.org/wtfpl>
##   0. You just DO WHAT THE FUCK YOU WANT TO.
use strict;
use warnings;
use 5.010;

use autodie;

use GD;
use Getopt::Std;
use Term::ANSIColor;
use LWP::UserAgent;

my %opts;
my $alpha;
my $share = $0;
my ($ext_ip, $int_ip);

sub get_ext_ip {

	if (-d '/sys/class/net/ppp0') {
		return qq{-};
	}

	my $ua = LWP::UserAgent->new(
		env_proxy => 0
	);
	my $re = $ua->get('http://derf.homelinux.org/cgi-bin/clientinfo/ip.cgi');

	if ($re->is_success()) {
		my $text = $re->decoded_content();
		chomp $text;
		return $text;
	}
	else {
		return qq{?};
	}
}

sub get_int_ip {
	my $wlan = qx{ifdata -pa wlan0 2> /dev/null};
	my $lan = qx{ifdata -pa lan 2> /dev/null};

	chomp $wlan;
	chomp $lan;

	if (length($wlan)) {
		return $wlan;
	}
	else {
		return $lan;
	}
}

sub show_net_png {
	my ($w, $h) = (160, 32);
	my $im = GD::Image->new($w, $h);
	my $icon = GD::Image->newFromPng("${share}/network.png", 1);

	my $black = $im->colorAllocateAlpha(  0,   0,   0, $alpha);
	my $white = $im->colorAllocateAlpha(255, 255, 255, $alpha);
	my $bg    = $im->colorAllocateAlpha(255, 255, 255, 127);

	my $ip_ext = get_ext_ip();
	my $ip_int = get_int_ip();

	$im->filledRectangle(0, 0, $w - 1, $h - 1, $bg);

	$im->string(gdMediumBoldFont, 37,  1, $ip_ext, $white);
	$im->string(gdMediumBoldFont, 36,  0, $ip_ext, $black);

	$im->string(gdMediumBoldFont, 37, 17, $ip_int, $white);
	$im->string(gdMediumBoldFont, 36, 16, $ip_int, $black);

	$im->copy($icon, 0, 0, 0, 0, 32, 32);

	open(my $out_fh, '>', '/tmp/vnet.png');
	binmode $out_fh;
	print $out_fh $im->png();
	close($out_fh);
}

sub show_net_console {
	printf(
		"int: %s\next: %s\n",
		get_int_ip(),
		get_ext_ip(),
	);
}

if (-l $share) {
	my $link = readlink($share);
	$share =~ s{ [^/]+ $ }{}x;
	$link  =~ s{ / bin / vnet $ }{}x;
	$share .= "${link}/share";
}
else {
	$share =~ s{ / bin / vnet $ }{}x;
	$share .= '/share';
}

getopts('a:cfg', \%opts);
$alpha = $opts{'a'} // 0;

if ($opts{'c'}) {
	show_net_console();
}
elsif ($opts{'g'}) {
	show_net_png();
}

if ($opts{'f'}) {
	exec('feh', '/tmp/vnet.png');
}

__END__

=head1 NAME

=head1 SYNOPSIS

=head1 DESCRIPTION

=head1 OPTIONS

=head1 EXIT STATUS

=head1 CONFIGURATION

=head1 DEPENDENCIES

=head1 BUGS AND LIMITATIONS

=head1 AUTHOR

Copyright (C) 2010 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

  0. You just DO WHAT THE FUCK YOU WANT TO.