package Mojolicious::Command::version;
use Mojo::Base 'Mojolicious::Command';

use Mojo::IOLoop::Client;
use Mojo::UserAgent;
use Mojolicious;

has description => 'Show versions of installed modules.';
has usage => sub { shift->extract_usage };

sub run {
  my $self = shift;

  my $ev    = eval 'use Mojo::Reactor::EV; 1' ? $EV::VERSION : 'not installed';
  my $class = 'Mojo::IOLoop::Client';
  my $ipv6  = $class->IPV6 ? $IO::Socket::IP::VERSION : 'not installed';
  my $socks = $class->SOCKS ? $IO::Socket::Socks::VERSION : 'not installed';
  my $tls   = $class->TLS ? $IO::Socket::SSL::VERSION : 'not installed';

  print <<EOF;
CORE
  Perl        ($^V, $^O)
  Mojolicious ($Mojolicious::VERSION, $Mojolicious::CODENAME)

OPTIONAL
  EV 4.0+                 ($ev)
  IO::Socket::IP 0.20+    ($ipv6)
  IO::Socket::Socks 0.64+ ($socks)
  IO::Socket::SSL 1.84+   ($tls)

EOF

  # Check latest version on CPAN
  my $latest = eval {
    my $ua = Mojo::UserAgent->new(max_redirects => 10);
    $ua->proxy->detect;
    $ua->get('api.metacpan.org/v0/release/Mojolicious')->res->json->{version};
  };

  return unless $latest;
  my $msg = 'This version is up to date, have fun!';
  $msg = 'Thanks for testing a development release, you are awesome!'
    if $latest < $Mojolicious::VERSION;
  $msg = "You might want to update your Mojolicious to $latest."
    if $latest > $Mojolicious::VERSION;
  say $msg;
}

1;

=encoding utf8

=head1 NAME

Mojolicious::Command::version - Version command

=head1 SYNOPSIS

  Usage: APPLICATION version

=head1 DESCRIPTION

L<Mojolicious::Command::version> shows version information for installed core
and optional modules.

This is a core command, that means it is always enabled and its code a good
example for learning to build new commands, you're welcome to fork it.

See L<Mojolicious::Commands/"COMMANDS"> for a list of commands that are
available by default.

=head1 ATTRIBUTES

L<Mojolicious::Command::version> inherits all attributes from
L<Mojolicious::Command> and implements the following new ones.

=head2 description

  my $description = $v->description;
  $v              = $v->description('Foo!');

Short description of this command, used for the command list.

=head2 usage

  my $usage = $v->usage;
  $v        = $v->usage('Foo!');

Usage information for this command, used for the help screen.

=head1 METHODS

L<Mojolicious::Command::version> inherits all methods from
L<Mojolicious::Command> and implements the following new ones.

=head2 run

  $v->run(@ARGV);

Run this command.

=head1 SEE ALSO

L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.

=cut