#! /usr/bin/perl -w
#
# Written by Oron Peled <oron@actcom.co.il>
# Copyright (C) 2009, Xorcom
# This program is free software; you can redistribute and/or
# modify it under the same terms as Perl itself.
#
# $Id$
#
use strict;
use File::Basename;
BEGIN {
	my $dir = dirname($0); unshift(@INC, "$dir", "$dir/perl_modules");
	$ENV{PATH} = "$dir:$ENV{PATH}";
}

use Dahdi::Config::Gen qw(is_true);
use Dahdi::Hardware;
use Dahdi::Xpp::Mpp;
use Dahdi::Xpp::Xbus;

my $xpporder_file = $ENV{XPPORDER_CONF} || "/etc/dahdi/xpp_order";

my @devices = Dahdi::Hardware->device_list;
my @xbuses = Dahdi::Xpp::xbuses;

my $format = "%-20s %-10s        # %s\n";

sub bad_xpds($) {
	my $xbus = shift || die;
	my $bad_xpds = 0;

	foreach my $xpd ($xbus->xpds) {
		if(! $xpd->spanno) {
			my $fqn = $xpd->fqn;
			warn "\t$fqn -- Not registered with DAHDI\n";
			$bad_xpds++;
		}
	}
	return $bad_xpds;
}

sub twinstar_checks() {
	my @twinstar_good;
	my $first_port;
	if(! -d "/sys/bus/astribanks") {
		die "CANNOT generate TwinStar setup -- xpp drivers are not loaded\n";
	}
	foreach my $dev (@devices) {
		my $hwname = $dev->hardware_name;
		my $xbus;
		my $loaded;
		my $tws_port;
		my $tws_power;
		my $tws_watchdog;
		my $mppinfo;
		if(! $dev->is_astribank) {
			warn "SKIP $hwname -- Only Astribanks can be used for TwinStar\n";
			next;
		}
		Dahdi::Xpp::Mpp->mpp_addinfo($dev);
		$mppinfo = $dev->mppinfo;
		if(! defined $mppinfo) {
			warn "SKIP $hwname -- is not TwinStar ready\n";
			next;
		}
		if(! defined $mppinfo->{MPP_TALK}) {
			warn "SKIP $hwname -- USB firmware is not loaded\n";
			next;
		}
		if(! $mppinfo->{TWINSTAR_CAPABLE}) {
			warn "SKIP $hwname -- is not TwinStar capable\n";
			next;
		}
		$xbus = $dev->xbus;
		if(! defined $xbus) {
			warn "SKIP $hwname -- No XBUS for this device (FPGA firmware? Initialization?)\n";
			next;
		}
		my $dev = $xbus->transport;
		my $connector = $xbus->connector;
		my $label = $xbus->label;
		my $xbusstr = sprintf "%s (%s) [%s]", $xbus->name, $connector, $label;
		if(bad_xpds($xbus)) {
			warn "SKIP $xbusstr -- Not registered with DAHDI\n";
			next;
		}
		my $port = $mppinfo->{TWINSTAR_PORT};
		if(! defined $port) {
			warn "SKIP $xbusstr -- Cannot read USB port info\n";
			next;
		}
		my $power = $mppinfo->{TWINSTAR_POWER};
		if(! defined $power) {
			warn "SKIP $xbusstr -- Cannot read USB power info\n";
			next;
		}
		if(!$power->[0] || !$power->[1]) {
			warn "WARNING: Only one cable: $xbusstr\n";
		}
		$first_port = $port unless defined $first_port;
		printf "GOOD: %-15s port=%d %s\n", $label, $port, $connector;
		push(@twinstar_good, $xbus);
		if($first_port != $port) {
			die
				"$0: ",
				"XBUS($connector, $label) ",
				"connected to PORT $port ",
				"(others to $first_port)\n";
		}
	}
	return @twinstar_good;
}

my @twinstar_good = twinstar_checks;
if(!@twinstar_good) {
	print STDERR "Abort. No Twinstar capable Astribanks found\n";
	exit 1;
}
print "Generating Configuration\n";
system("dahdi_genconf -v xpporder");
die "Failed: $?\n" if $?;

1;

__END__

=head1 NAME

twinstar_setup - Prepares a server for Astribank TwinStar operation.

=head1 DESCRIPTION

This script prepares a server for Astribank TwinStar operation.
The stages are:

=over

=item Preliminary checks

Check that we have only TwinStar capable Astribanks, that the drivers are already loaded.

=item Configuration Generation

Indirectly generate the F</etc/dahdi/xpp_order> file that describes the current configuration.
This is done by running C<dahdi_genconf xpporder>

This configuration file is used by twinstar_hook(8) to know when all Astribanks has reconnected
to the backup server.

=item Deployment to Backup Server

Not implemented yet. Should be done manualy.

=back