#!/usr/bin/perl

use Socket;

use lib qw(/usr/lib/libDrakX);
use interactive::gtk; 
use run_program;
use standalone;
use common;
use ugtk2 qw(:helpers :wrappers :create);


my @_local_networks = qw(
    169.254.0.0/16 172.16.0.0/12 192.0.2.0/24 192.168.0.0/16 

    0.0.0.0/7 2.0.0.0/8 5.0.0.0/8 7.0.0.0/8 
    10.0.0.0/8 23.0.0.0/8 27.0.0.0/8 
    31.0.0.0/8 36.0.0.0/7 39.0.0.0/8
    41.0.0.0/8 42.0.0.0/8 49.0.0.0/8 
    50.0.0.0/8 58.0.0.0/7 70.0.0.0/7 72.0.0.0/5
    83.0.0.0/8 84.0.0.0/6 88.0.0.0/5 96.0.0.0/3 
    
    127.0.0.0/8 197.0.0.0/8
    198.18.0.0/15 223.0.0.0/8 240.0.0.0/4
);


sub ip_to_bit_string { pack('C4', split('\.', $_[0])) }
sub bit_string_to_ip { join('.', unpack('C4', $_[0])) }
sub mask_class_to_bitmask { pack("N", (2 ** $_[0] - 1) << (32 - $_[0])) }


################################################################################
# raw_host and host ############################################################
################################################################################
sub raw_host_to_host {
    my ($raw_host) = @_;
    if ($raw_host =~ /^\d+\./) {
	my $name = gethostbyaddr(Socket::inet_aton($raw_host), Socket::AF_INET());
	$name =~ s/\.$//;
	{ ip => $raw_host, name => $name };
    } else {
	my $raw_ip = scalar gethostbyname($raw_host);
	{ ip => $raw_ip && Socket::inet_ntoa($raw_ip), name => $raw_host };
    }
}

sub raw_hosts_to_hosts {
    my ($raw_hosts) = @_;
    [ map { raw_host_to_host($_) } @$raw_hosts ];
}

sub host_to_raw_host {
    my ($host) = @_;
    $host->{ip} || $host->{name};
}

sub host_to_string {
    my ($host) = @_;
    $host->{name} || $host->{ip};
}

sub scanssh_output_to_hosts {
    [ map { 
	chomp; 
	if (my ($ip, $_version) = /([.\d]+)/) {
	    raw_host_to_host($ip);
	} else {
	    ();
	}
    } @_ ];
}


################################################################################
# networks #####################################################################
################################################################################
sub apply_netmask {
    my ($ip, $network) = @_;
    if ($network->{bitmask}) {
	bit_string_to_ip(ip_to_bit_string($ip) & $network->{bitmask});
    } else {
	$ip;
    }
}

sub networks_to_nb_hosts {
    my ($networks) = @_;
    sum(map { $_->{mask_class} ? 2 ** (32 - $_->{mask_class}) : 1 } @$networks);
}

sub string_to_network {
    my ($s) = @_;
    if (my ($ip, $mask_class) = $s =~ m!(.*)/(\d+)!) {
	my $network = { mask_class => $mask_class, bitmask => mask_class_to_bitmask($mask_class) };
	$network->{base} = apply_netmask($ip, $network);
	$network;
    } else {
	raw_host_to_host($s);
    }
}
sub string_to_networks {
    [ map { string_to_network($_) } split(' ', $_[0]) ];
}
sub network_to_string {
    my ($network) = @_;
    $network->{mask_class} ? $network->{base} . '/' . $network->{mask_class} : host_to_raw_host($network);
}
sub networks_to_string {
    my ($networks) = @_;
    join(' ', map { network_to_string($_) } @$networks);
}

sub default_networks() {
    my @l = `LC_ALL=C LANGUAGE=C /sbin/ip addr show` =~ /^\s*inet\s(\S+)/mg;
    [ map { string_to_network($_) } grep { !/^127\./ } @l ];
}


sub default_group() {
    { name => '', protocol => 'ssh', medias => [], raw_hosts => [], networks => default_networks() };
}

sub populate_networks_with_raw_hosts {
    my ($group) = @_;
    
    $_->{hosts} = [] foreach @{$group->{networks}};

    my @other;
  RAW: foreach (@{$group->{raw_hosts}}) {
	my $host = raw_host_to_host($_);
	$host->{selected} = 1;
	foreach my $network (@{$group->{networks}}) {
	    if ($host->{ip} && apply_netmask($host->{ip}, $network) eq $network->{base}) {
		push @{$network->{hosts}}, $host;
		next RAW;
	    }	    
	}
	push @other, $host;
    }
    push @{$group->{networks}}, @other;
}

sub populated_networks_to_raw_hosts {
    my ($group) = @_;

    my @hosts;

    #- remove unused networks and non-networks
    @{$group->{networks}} = grep { 
	my @l = grep { $_->{selected} } $_->{mask_class} ? @{$_->{hosts}} : $_;
	push @hosts, @l;
	$_->{mask_class} && @l
    } @{$group->{networks}};

    $group->{raw_hosts} = [ map { host_to_raw_host($_) } @hosts ];
}

################################################################################
# ssh ##########################################################################
################################################################################
sub private_key() { "$ENV{HOME}/.ssh/id_dsa" }
sub public_key() { private_key() . '.pub' }

sub generate_keygen {
    my ($private_key) = @_;
    system('ssh-keygen', '-P', '', '-t', 'dsa', '-f', $private_key);
}

sub ssh_command_interactive {
    my ($command, $host_name, $get_password) = @_;

    require Expect;
		
    my $expect = Expect->spawn(@$command) or die "can't run @$command\n";

    $expect->log_stdout($::testing);

    my $timeout = 10;
    my $nb_retry;
    $expect->expect($timeout,
		    [ qr/password: $/, sub { 
			  my $password = $get_password->($nb_retry++);
			  $expect->send("$password\n");
			  Expect::exp_continue();
		      } ],
		    [ qr!The authenticity of host .* can't be established.*continue connecting \Q(yes/no)?\E $!s, sub { $expect->send("yes\n") } ],
		    [ qr/Permission denied/, sub { die sprintf("Permission denied transferring on %s", $host_name) } ],
		    [ qr/No such file or directory/, sub { die sprintf("No such file or directory on %s", $host_name) } ],
		    [ timeout => sub { die sprintf("%s not responding", $host_name) } ],
		   ); 

    my $exit_stat = $expect->exitstatus;
    $expect->hard_close;
    $exit_stat == 0 or die "@$command failed\n";
}

sub ssh_copy_id {
    my ($public_key, $login_user, $host_name, $get_password) = @_;

    if (system('ssh', '-o', 'PasswordAuthentication no', '-o', 'StrictHostKeyChecking no', $login_user . '@' . $host_name, 'true') == 0) {
	#- already configured
	1;
    } else {
	my @command = ('ssh-copy-id', '-i', $public_key, $login_user . '@' . $host_name);
	warn "ssh_copy_id @command\n";
	ssh_command_interactive(\@command, $host_name, $get_password);
    }
}

sub allow_ssh_on_hosts {
    my ($in, $hosts) = @_;

    if (! -e public_key()) {
	my $_w = $in->wait_message('', N("Generating SSH authentication keys"));
	generate_keygen(private_key());
    }
    eval {
	my $password;
	foreach my $host (map { host_to_string($_) } @$hosts) {
	    my $ask_password = sub {
		my ($retry) = @_;
		if ($retry || ! defined $password) {
		    $in->ask_from_({ messages => 
N("We propose to configure hosts to allow access from this root account using the key %s.

If you enter the root password for host %s, we will copy the public key to the authorized_keys", private_key(), $host),
				     focus_first => 1,
				   },
				  [ { val => \$password, hidden => 1 } ]) or die 'cancel';
		}
		$password;
	    };
	    ssh_copy_id(public_key(), 'root', $host, $ask_password);
	}
    };
    if ($@) {
	return if $@ =~ /^cancel/;
	die;
    }
    1;
}

################################################################################
# urpmi config file ############################################################
################################################################################
my $parallel_config_file = '/etc/urpmi/parallel.cfg';
sub read_parallel_config() {
    [ map {
	chomp;
	my $networks = s/ # networks:(.*)// && string_to_networks($1);
	s/#.*//; s/\s*$//;
        my ($name, $protocol, $command) = split(':', $_, 3) or warn "Warning, unrecognized line in $parallel_config_file:\n$_";
        my @medias = $protocol =~ s/\(([^\)]+)\)$// ? split(/,/, $1) : ();

	my @raw_hosts = 
	  $protocol eq 'ssh' ? split(':', $command) : 
	  $protocol eq 'ka-run' ? $command =~ /-m (\S+)/g :
	    die "unknown protocol $protocol in $parallel_config_file";

        { name => $name, protocol => $protocol, medias => \@medias, raw_hosts => \@raw_hosts, networks => $networks };
    } cat_($parallel_config_file) ];
}

sub write_parallel_config {
    my ($conf) = @_;

    my @l = map { 
	my $command =
	  $_->{protocol} eq 'ssh' ? join(':', @{$_->{raw_hosts}}) 
	    : join(' ', '-c ssh', map { "-m $_" } @{$_->{raw_hosts}});

	my $protocol = $_->{protocol} . (@{$_->{medias}} ? '(' . join(',', @{$_->{medias}}) . ')' : '');

	join(':', $_->{name}, $protocol, $command) .
	  ($_->{networks} ? ' # networks:' . networks_to_string($_->{networks}) : '') .
	  "\n";
    } @$conf;

    print @l;
    output($parallel_config_file, @l);
}

################################################################################
# interface ####################################################################
################################################################################
sub networks_to_scanned_hosts {
    my ($networks) = @_;
    my $nb_hosts = networks_to_nb_hosts($networks);

    my $w = ugtk2->new('drakpark');
    ugtk2::set_main_window_size($w);
    my $progress = Gtk2::ProgressBar->new;

    my $output;
    my ($textscroll, $pid) = 
      ugtk2::gtk_new_TextView_get_log('scanssh ' . networks_to_string($networks), 
				      sub { $output .= $_[0]; 
					    my $ratio = listlength($output =~ /\n/g) / ($nb_hosts + 1);
					    $progress->set_fraction($ratio); 
					    $_[0] },
				      sub { Gtk2->main_quit }) or return;

    gtkadd($w->{window}, 
	   gtkpack_(Gtk2::VBox->new,
		    0, gtkpack_(Gtk2::HBox->new, 
				0, N("Please wait, scanning network..."),
				1, $progress),
		    1, $textscroll,
		    0, gtksignal_connect(Gtk2::Button->new("Stop"), clicked => sub { kill 9, $pid }),
	      ));
    $w->main;

    scanssh_output_to_hosts(split("\n", $output));
}

sub group_modify {
    my ($in, $group, $groups) = @_;
    my @orig_raw_hosts = @{$group->{raw_hosts}};
    my %widgets = (
	name => gtkset_text(Gtk2::Entry->new, $group->{name}),
	protocol => Gtk2::OptionMenu->new_with_strings([ 'ssh', 'ka-run' ], $group->{protocol}),
        scan => Gtk2::Button->new(N("Scan")),
	network => Gtk2::Button->new(N("Add a network")),
    );

    my $tree_model = Gtk2::TreeStore->new('Glib::Int', 'Glib::String', 'Glib::String', 'Glib::String');
    my $tree = Gtk2::TreeView->new_with_model($tree_model);
    $tree->get_selection->set_mode('browse');

    {
	my $col = Gtk2::TreeViewColumn->new_with_attributes(N("Network & IP"), Gtk2::CellRendererText->new, text => 1);
	$col->set_sort_column_id(1);
	$tree->append_column($col);
	$col->clicked;
    }
    {
	my $col = Gtk2::TreeViewColumn->new_with_attributes(N("Name"), Gtk2::CellRendererText->new, text => 2);
	$col->set_sort_column_id(2);
	$tree->append_column($col);
    }
    {
	my $col = Gtk2::TreeViewColumn->new_with_attributes(undef, my $toggle = Gtk2::CellRendererToggle->new, active => 0);
	$tree->append_column($col);

	$toggle->signal_connect(toggled => sub {
	    my (undef, $path_str, $tree_model) = @_;
	    my $iter = $tree_model->get_iter_from_string($path_str);
	    my $val = !$tree_model->get($iter, 0);
	    $tree_model->set($iter, 0 => $val);

	    #- select/deselect all hosts in that network
	    $tree_model->iter_each_children($iter, sub { $tree_model->set($_[0], 0 => $val) });
        }, $tree_model);
    }

    $tree_model->set_sort_func(1, sub { 
				   my ($tree_model, $a, $b) = @_;
				   $tree_model->get($a, 3) cmp $tree_model->get($b, 3);
			       });

    my $add_host = sub { 
	my ($host, $o_parent) = @_;
	$tree_model->append_set($o_parent, [ 0 => $host->{selected}, 1 => $host->{ip}, 2 => $host->{name}, 3 => ip_to_bit_string($host->{ip}) ]);
    };
    my $add_network = sub {
	my ($network) = @_;
	if ($network->{mask_class}) {
	    my $w = $tree_model->append_set(undef, [ 0 => 0, 1 => network_to_string($network) ]);
	    $add_host->($_, $w) foreach @{$network->{hosts}};
	    $tree->expand_row($tree_model->get_path($w), 0);
	} else {
	    $add_host->($network);
	}
    };
    if (!@{$group->{networks}}) {
	$group->{networks} = default_networks();
    }
    populate_networks_with_raw_hosts($group);
    $add_network->($_) foreach @{$group->{networks}};

    my $get_from_widgets = sub {
	foreach ('name', 'protocol') {
	    $group->{$_} = $widgets{$_}->get_text;
	}

	$tree_model->iter_each_children(undef, sub {
	    my ($iter) = @_;
	    my $s = $tree_model->get($iter, 1);
	    my $network = find { $s eq network_to_string($_) } @{$group->{networks}};
	    $network->{selected} = $tree_model->get($iter, 0);
	    $tree_model->iter_each_children($iter, sub {
		my $s = $tree_model->get($_[0], 1);
		my $host = find { $s eq $_->{ip} } @{$network->{hosts}};
		$host->{selected} = $tree_model->get($_[0], 0);
	    })
	});
    };

    my %size_groups = map { $_ => Gtk2::SizeGroup->new('horizontal') } qw(label widget);
    my $label_and_widget = sub {
	my ($label, $widget) = @_;
	gtkpack_(Gtk2::HBox->new, 
		 0, gtkadd_widget($size_groups{label}, $label), 
		 1, gtkadd_widget($size_groups{widget}, $widget));
    };

    {
	my $selected = [];
	$tree->get_selection->signal_connect(changed => sub {
	    my ($selection) = @_;
	    my ($tree_model, $iter) = $selection->get_selected or return;
	    my $s = $tree_model->get($iter, 1);
	    my $network = find { $s eq network_to_string($_) } @{$group->{networks}};
	    $widgets{scan}->set_sensitive($network && $network->{mask_class});
	    $selected = [ $iter, $network ];
	});
	$widgets{scan}->signal_connect(clicked => sub {
	    my ($iter, $network) = @$selected;
	    if ($network && $network->{mask_class}) {
		my $hosts = networks_to_scanned_hosts([ $network ]);
		@{$network->{hosts}} = uniq_ { $_[0]{ip} } @{$network->{hosts}}, @$hosts;

		my %have = map { $_ => 1 } @{$network->{hosts}}; #- have been added
		$add_host->($_, $iter) foreach grep { $have{$_} } @$hosts;
		$tree->expand_row($tree_model->get_path($iter), 0);
	    } else {
		$widgets{scan}->set_sensitive(0);
		$in->ask_warn('', ($network ? N("You can't scan an IP address.") : '') . N("Select a network"));
	    }
	});
    }

    $widgets{network}->signal_connect(clicked => sub {
	my $s = $in->ask_from_entry('', N("Enter a network (eg: 192.168.1.0/28) or a IP")) or return;
	my $network = string_to_network($s);
	if (0) {
	    $in->ask_yesorno('', N("The network %s is public, not a local network (scanning over internet could be illegal)
Do you really want to use this network?"));
	}
	push @{$group->{networks}}, $network;
	$add_network->($network);
    });

    my $mainw = ugtk2->new(N("Urpmi Parallel Group chooser"));
    ugtk2::set_main_window_size($mainw);
    gtkadd($mainw->{window},
	   gtkpack_(Gtk2::VBox->new,
		    0, $label_and_widget->(N("Name"), $widgets{name}),
		    0, $label_and_widget->(N("Protocol"), $widgets{protocol}),
		    1, gtkpack_(Gtk2::HBox->new,
				1, create_scrolled_window($tree),
				0, gtkpack__(Gtk2::VBox->new,
					     $widgets{scan},
					     $widgets{network},
					     )),
		    0, $mainw->create_okcancel,
		  ));
    ($group->{name} ? $mainw->{ok} : $widgets{name})->grab_focus;

    $mainw->main(sub {
	$get_from_widgets->();

	$group->{name} or $in->ask_warn(N("Error"), N("Name missing")), return 0;
	every { $_ == $group || $group->{name} ne $_->{name} } @$groups or 
	  $in->ask_warn(N("Error"), N("Name already used")), return 0;

	(my $pkg_for_protocol = "urpm::parallel_$group->{protocol}") =~ s/-/_/g;
	if (! eval "require $pkg_for_protocol; 1") {
	    $in->do_pkgs->ensure_is_installed("urpmi-parallel-$group->{protocol}") or return;
	}

	populated_networks_to_raw_hosts($group);
	write_parallel_config($groups);
	1;
    }) or return;

    if (my @new_hosts = difference2($group->{raw_hosts}, \@orig_raw_hosts)) {
	allow_ssh_on_hosts($in, raw_hosts_to_hosts(\@new_hosts));
    }

    $group;
}

sub group_add {
    my ($in, $groups) = @_;
    my $group = group_modify($in, default_group(), $groups) or return;
    push @$groups, $group;
    write_parallel_config($groups);
    $group;
}

sub group_remove {
    my ($in, $group, $groups) = @_;
   
    $in->ask_yesorno(N("Warning"), N("Really remove group %s?", $group->{name})) or return;
    @$groups = grep { $_ != $group } @$groups;
    write_parallel_config($groups);
    1;
}

sub group_use {
    my ($in, $group) = @_;
    @{$group->{raw_hosts}} or $in->ask_warn(N("Error"), N("This group doesn't have any hosts")), return 0;
    exec 'rpmdrake', "--parallel=$group->{name},$group->{raw_hosts}[0]";
}

sub group_chooser {
    my ($in, $groups) = @_;
    my ($treelist, $set, $group);
    my $list_for_interactive = { format => sub { $_[0]{name} } , formatted_list => [ map { $_->{name} } @$groups ], list => $groups, val => \$group };
    my $changed = sub { $set->($group) };

    my @buttons = (
	{ kind => 'add', name => N("New Group"), action => sub { group_add($in, $groups) } },
	{ kind => 'remove', name => N("Remove Group"), action => sub { group_remove($in, $group, $groups) } },
	{ kind => 'modify', name => N("Modify Group"), action => sub { group_modify($in, $group, $groups) } },
		   my $modify =
	{ kind => 'modify', name => N("Use Group"), action => sub { group_use($in, $group) } },
	{ kind => '', name => N("Quit"), action => sub { ugtk2::exit() } },
    );
    my $do_action = sub {
	my ($button) = @_;
	interactive::gtk::add_modify_remove_action($button, \@buttons, $list_for_interactive, $treelist) and $changed->();
    };

    ($treelist, $set) = interactive::gtk::create_treeview_list($list_for_interactive, sub {}, $changed, 
							       sub { $do_action->($modify) if $_[1]->type =~ /^2/ });

    foreach my $button (@buttons) {
	$button->{button} = Gtk2::Button->new($button->{name});
	$button->{button}->signal_connect(clicked => sub { $do_action->($button) });
    }
    interactive::gtk::add_modify_remove_sensitive(\@buttons, $list_for_interactive);

    my $mainw = ugtk2->new(N("Urpmi Parallel Group chooser"));
    gtkadd($mainw->{window},
	   gtkpack_(Gtk2::VBox->new,
		    1, create_scrolled_window($treelist),
		    0, gtkpack(Gtk2::HBox->new, map { $_->{button} } @buttons)));
    $mainw->main;
}

my $icon = '/usr/share/mcc/themes/default/drakpark-mdk.png';
$ugtk2::wm_icon = $icon if -f $icon;

push @::textdomains, 'rpmdrake';

my $groups = read_parallel_config();
my $in = interactive->vnew('su');
#group_modify($in, $groups->[0], $groups);
group_chooser($in, $groups);