#!/usr/bin/perl -w

use lib qw(/usr/lib/libDrakX);

use strict;
use standalone;     #- warning, standalone must be loaded very first, for 'explanations'
use MDK::Common;
use interactive;
use harddrake::data;
use Storable qw(store retrieve);

my $invert_do_it = $ARGV[0] eq 'X11' ? 1 : 0;
my ($hw_sysconfdir, $timeout) = ("/etc/sysconfig/harddrake2", $invert_do_it ? 600 : 5);
my $last_boot_config = $hw_sysconfdir."/previous_hw";

$last_boot_config .= '_X11' if $invert_do_it;

# first run ? if not read old hw config
my $previous_config = (-f $last_boot_config && -s $last_boot_config) ? retrieve($last_boot_config) : {};
$previous_config = $$previous_config if ref($previous_config) !~ /HASH/;
my (%config, $wait);
my $in = interactive->vnew;

# For each hw, class, detect device, compare and offer to reconfigure if needed
foreach (@harddrake::data::tree) {
    my ($Ident, $item, undef, $configurator, $detector, $do_it) = @$_;
    next unless $do_it ^ $invert_do_it;
    # No detector ? (should never happen but who know ?)
    ref($detector) eq 'CODE' or next;

    my %ID = map {
	   my $i = $_;
	   my $id = defined $i->{device} ? $i->{device} : join(':', map { $i->{$_} } qw(vendor id subvendor subid));
	   $id => $i;
    } &$detector;
    $config{$Ident} = \%ID;
    next if is_empty_hash_ref $previous_config; # don't fsck on first run

    my $oldconfig = $previous_config->{$Ident};

    my $msg;
    my @was_removed = difference2([ keys %$oldconfig ], [ keys %ID ]);
    if (@was_removed) {
	$msg .= _("Some devices in the \"%s\" hardware class were removed:\n", $item) .
	    "- ". harddrake::data::custom_id($oldconfig->{$_}, $item) ." was removed\n" foreach @was_removed . "\n";
    }
    my @added = difference2([ keys %ID ], [ keys %$oldconfig ]);
    $msg .= _("Some devices were added:\n", $item) if @added;
    $msg .= "- ". harddrake::data::custom_id($ID{$_}, $item) ." was added\n" foreach (@added);
    @added || @was_removed or next;
    next unless (-x $configurator);
    my ($pid, $no);
    $SIG{ALRM} = sub { $no = 1; kill 15, $pid };
    unless ($pid = fork) {
	exec("/usr/share/harddrake/confirm 'Hardware changes in $Ident class ($timeout seconds to answer)' '" . $msg . "Do you want to run the appropriate config tool ?'");
    }
    alarm($timeout);
    wait;
    my $res = $?;
    alarm(0);
    if ($no) {
	require interactive;
	undef $wait;
	$wait = $in->wait_message(_('Please wait'), _('Hardware probing in progress'));
    } elsif ($res) {
	if (my $pid = fork) {
	    wait;
	} else { exec("$configurator 2>/dev/null") or die "$configurator missing\n" }
    }
}

# output new hw config
standalone::explanations "created file $last_boot_config";
store \%config, $last_boot_config;
$in->exit(0);