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our $context;

our $LAYERS = $AWS::Lambda::AL::LAYERS;
our $LAYERS_AL2 = $AWS::Lambda::AL2::LAYERS;
our $LAYERS_AL2023 = $AWS::Lambda::AL2023::LAYERS;

sub get_layer_info {
    my ($version, $region) = @_;
    return $LAYERS->{$version}{$region};
}

sub print_runtime_arn {
    my ($version, $region) = @_;
    print $LAYERS->{$version}{$region}{runtime_arn};
}

sub print_paws_arn {
    my ($version, $region) = @_;
    print $LAYERS->{$version}{$region}{paws_arn};
}

sub get_layer_info_al2 {
    my ($version, $region, $arch) = @_;
    $arch //= 'x86_64';
    return $LAYERS_AL2->{$version}{$arch}{$region};
}

sub print_runtime_arn_al2 {
    my ($version, $region, $arch) = @_;
    $arch //= 'x86_64';
    print $LAYERS_AL2->{$version}{$arch}{$region}{runtime_arn};
}

sub print_paws_arn_al2 {
    my ($version, $region, $arch) = @_;
    $arch //= 'x86_64';
    print $LAYERS_AL2->{$version}{$arch}{$region}{paws_arn};
}

sub get_layer_info_al2023 {
    my ($version, $region, $arch) = @_;
    $arch //= 'x86_64';
    return $LAYERS_AL2023->{$version}{$arch}{$region};
}

sub print_runtime_arn_al2023 {
    my ($version, $region, $arch) = @_;
    $arch //= 'x86_64';
    print $LAYERS_AL2023->{$version}{$arch}{$region}{runtime_arn};
}

sub print_paws_arn_al2023 {
    my ($version, $region, $arch) = @_;
    $arch //= 'x86_64';
    print $LAYERS_AL2023->{$version}{$arch}{$region}{paws_arn};
}

1;
__END__

=encoding utf-8

=head1 NAME

AWS::Lambda - Perl support for AWS Lambda Custom Runtime.

=head1 SYNOPSIS

Save the following Perl script as C<handler.pl>.

    sub handle {
        my ($payload, $context) = @_;
        return $payload;
    }
    1;

and then, zip the script.

    $ zip handler.zip handler.pl

Finally, create new function using awscli.

    $ aws --region "$REGION" --profile "$PROFILE" lambda create-function \
        --function-name "hello-perl" \
        --zip-file "fileb://handler.zip" \
        --handler "handler.handle" \
        --runtime provided.al2023 \
        --role arn:aws:iam::xxxxxxxxxxxx:role/service-role/lambda-custom-runtime-perl-role \
        --layers "arn:aws:lambda:$REGION:445285296882:layer:perl-5-38-runtime-al2023-x86_64:1"

It also supports L<response streaming|https://docs.aws.amazon.com/lambda/latest/dg/configuration-response-streaming.html>.

    sub handle {
        my ($payload, $context) = @_;
        return sub {
            my $responder = shift;
            my $writer = $responder->('application/json');
            $writer->write('{"foo": "bar"}');
            $writer->close;
        };
    }

=head1 DESCRIPTION

This package makes it easy to run AWS Lambda Functions written in Perl.

=head2 Use Pre-built Public Lambda Layers

=over

=item 1

Login to your AWS Account and go to the Lambda Console.

=item 2

Create a new function and give it a name and an IAM Role.

=item 3

For the "Runtime" selection, select B<Provide your own bootstrap on Amazon Linux 2>.