package Enigmatic::Rotor;
use DAKKAR::p 'class';
use Enigmatic::Types qw(WiringMap Letter RotorPos);
use MooseX::Types::Set::Object;

with 'Enigmatic::Role::Rotate';

has wiring => (
    is => 'ro',
    isa => WiringMap,
    coerce => 1,
);

has inverse_wiring => (
    is => 'ro',
    isa => WiringMap,
    init_arg => undef,
    lazy_build => 1,
);

sub _build_inverse_wiring {
    my ($self) = @_;
    my $w = $self->wiring;
    my $ret = { reverse %$w };
    return $ret;
}

has ring_setting => (
    is => 'rw',
    isa => RotorPos,
    default => 0,
    coerce => 1,
);

has notches => (
    isa => 'Set::Object',
    coerce => 1,
    handles => {
        has_notch_at => 'member',
    },
    default => sub { [] },
);

with 'Enigmatic::Role::WithWiring';

sub map {
    my $self = shift;
    my ($letter) = pos_validated_list(
        \@_,
        { isa => Letter },
    );

    return $self->_real_map($letter,'wiring');
}

sub inverse_map {
    my $self = shift;
    my ($letter) = pos_validated_list(
        \@_,
        { isa => Letter },
    );

    return $self->_real_map($letter,'inverse_wiring');
}

sub _real_map {
    my ($self,$letter,$wiring) = @_;

    my $setting = $self->ring_setting;

    $letter = _rotate_by($letter,-$setting);
    $letter = $self->$wiring->at($letter);
    $letter = _rotate_by($letter,$setting);

    return $letter;
}

__END__

=head1 AUTHOR

Gianni Ceccarelli <dakkar@thenautilus.net>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Gianni Ceccarelli.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, version 3.

=cut