#! /usr/bin/perl

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Copyright (C) 2016 - 2017 Raphaël Gertz <acmepl@rapsys.eu>

# Best practice
use strict;
use warnings;

# Load required modules
use JSON;
use Tie::IxHash;

# Load POSIX
use POSIX qw(EXIT_SUCCESS EXIT_FAILURE);

# XXX: Debug
use Data::Dumper;

# Init redhat
my @redhat = ();

# Init debian
my @debian = ();

# Init root
my %root = ();
tie(%root, 'Tie::IxHash', thumbprint => '/etc/acmepl/thumbprint', certificates => []);

# Init prod
my $prod = 0;

# Strip and enable prod
@ARGV = map { if ($_ eq '-p') { $prod = 1; (); } else { $_; } } @ARGV;

# Strip and enable debug
for (my $i = 0; $i <= $#ARGV; $i++) {
	# Match redhat types
	if ($ARGV[$i] =~ /^(?:(\-r|\-\-redhat)(?:=([^-][a-zA-Z0-9_\.,-]+))?)$/) {
		if (defined($2)) {
			push(@redhat, split(',', $2));
		# Extract next parameter
		} elsif(defined($ARGV[$i+1]) && $ARGV[$i+1] =~ /^([^-][a-zA-Z0-9_\.,-]+)$/) {
			push(@redhat, split(',', $1));
			$i++;
		# Set default
		} else {
			push(@redhat, ('example.com'));
		}
	# Match debian types
	} elsif ($ARGV[$i] =~ /^(?:(\-d|\-\-debian)(?:=([^-][a-zA-Z0-9_\.,-]+))?)$/) {
		if (defined($2)) {
			push(@debian, split(',', $2));
		# Extract next parameter
		} elsif(defined($ARGV[$i+1]) && $ARGV[$i+1] =~ /^([^-][a-zA-Z0-9_\.,-]+)$/) {
			push(@debian, split(',', $1));
			$i++;
		# Set default
		} else {
			push(@debian, ('example.com'));
		}
	}
}

# Show usage
if (scalar(@ARGV) < 1) {
	print "Usage: $0 [(-d|--debian)[=example.com[,...]] [(-r|--redhat)[=example.com[,...]]] [...] > /etc/acmepl/config\n";
	exit EXIT_FAILURE;
}

# Append redhat style examples
foreach my $key (@redhat) {
	tie(%{$root{certificates}[$#{$root{certificates}}+1]}, 'Tie::IxHash', (
		# Public cert
		#XXX: required
		cert => '/etc/pki/tls/certs/'.$key.'.pem',
		# Private key
		#XXX: required
		key => '/etc/pki/tls/private/'.$key.'.pem',
		# Mail address
		#XXX: required
		mail => 'webmaster@'.$key,
		# Root domain
		#XXX: required
		domain => 'www.'.$key,
		# Domain list
		#XXX: required
		domains => [
			$key,
			'...'
		],
		# Production certificate
		#XXX: optional
		#XXX: set to 1 for production
		prod => $prod
	));
}

# Append debian style examples
foreach my $key (@debian) {
	tie(%{$root{certificates}[$#{$root{certificates}}+1]}, 'Tie::IxHash', (
		# Public cert
		#XXX: required
		cert => '/etc/ssl/certs/'.$key.'.crt',
		# Private key
		#XXX: required
		key => '/etc/ssl/private/'.$key.'.key',
		# Mail address
		#XXX: required
		mail => 'webmaster@'.$key,
		# Root domain
		#XXX: required
		domain => 'www.'.$key,
		# Domain list
		#XXX: required
		domains => [
			$key,
			'...'
		],
		# Production certificate
		#XXX: optional
		#XXX: set to 1 for production
		prod => $prod
	));
}

# Display configuration template
print to_json(\%root, {pretty => 1});

# Exit with success
exit EXIT_SUCCESS;