package Module::Build::Config;

use strict;
use vars qw($VERSION);
$VERSION = '0.4003';
$VERSION = eval $VERSION;
use Config;

sub new {
my ($pack, %args) = @_;
return bless {
stack => {},
values => $args{values} || {},
}, $pack;
}

sub get {
my ($self, $key) = @_;
return $self->{values}{$key} if ref($self) && exists $self->{values}{$key};
return $Config{$key};
}

sub set {
my ($self, $key, $val) = @_;
$self->{values}{$key} = $val;
}

sub push {
my ($self, $key, $val) = @_;
push @{$self->{stack}{$key}}, $self->{values}{$key}
if exists $self->{values}{$key};
$self->{values}{$key} = $val;
}

sub pop {
my ($self, $key) = @_;

my $val = delete $self->{values}{$key};
if ( exists $self->{stack}{$key} ) {
$self->{values}{$key} = pop @{$self->{stack}{$key}};
delete $self->{stack}{$key} unless @{$self->{stack}{$key}};
}

return $val;
}

sub values_set {
my $self = shift;
return undef unless ref($self);
return $self->{values};
}

sub all_config {
my $self = shift;
my $v = ref($self) ? $self->{values} : {};
return {%Config, %$v};
}

1;