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

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

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

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 $self->wiring->at($self->_apply_ring_setting($letter));
}

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

    return chr(
        (ord($letter) - ord('A') + $self->ring_setting)
            % 26
                +ord('A') );
}