package Die;

use strict;
use warnings;

sub new {
	my ( $proto, $faces ) = @_;
	my $class = ref( $proto ) || $proto;
	my $self = {};
	unless ( defined( $faces ) && ref( $faces ) =~ m/ARRAY/ ) {
		die "Must initialize Die with an array ref of faces.\n";
	}
        # Make copy of @$faces so that faces can't be 
        # corrupted from outside the package.
	$self->{Faces} = [@{$faces}];
	bless $self, $class;
	return $self;
}

sub roll {
	my $self = shift;
	return $self->{Faces}[ rand( @{ $self->{Faces} } ) ];
}


package main;
use strict;
use warnings;

my $six_sided   = Die->new( [1..6]     );
my $eight_sided = Die->new( [1..8]     );
my $alpha_faced = Die->new( ['A'..'Z'] );
my $eight_ball  = Die->new( [	"Yes",
								"I'll never tell",
								"Perhaps",
								"No",
								"Ask Again Later",
								"Outlook positive",
								"Don't bet on it",
								"Of course"	
							] );

foreach ( $six_sided, $eight_sided, $alpha_faced, $eight_ball ) {
	print $_->roll(), "\n";
}