#!/usr/bin/perl -w

use strict;
use Net::OSCAR qw(:standard);
use YAML qw(LoadFile DumpFile);

my $config_file = $ENV{'HOME'}.'/.icq-chat';
my $config;

sub readln {
    my $msg = shift || return;
    print "$msg ";
    my $in = <STDIN>;
    chomp($in);
    return $in;
}

sub read_config {
    if (-e $config_file) {
        $config = LoadFile($config_file) || die "can't open $config_fi
+le: $!";
        die "configuration file $config_file is corrupt. Erase it to r
+ecover.\n" unless ($config->{'uin'} && $config->{'passwd'});
    } else {
        $config->{'uin'} = readln("group uin:");
        $config->{'passwd'} = readln("password:");
        $config->{'members'} = {};

        save_config();
    }
}

sub save_config {
    print DumpFile($config_file, $config) || die "can't open $config_f
+ile: $!";
}


sub im_in {
    my($oscar, $sender, $message, $is_away) = @_;
    print "[AWAY] " if $is_away;
    print "$sender: $message\n";

    unless ($config->{'members'}->{$sender}) {
        $config->{'members'}->{$sender} = $sender;
        $oscar->send_im($sender, 'Welcome to group ICQ chat. Change yo
+ur name with: "!nick your_name". You can leave group chat with !exit 
+or !leave.');
        save_config();
    }

    if ($message =~ m#^!nick\s+(.+)\s*$#) {
        $config->{'members'}->{$sender} = $1;
        $oscar->send_im($sender, "Your name will be: $1");
        save_config();
        return;
    }

    if ($message =~ m#^!(?:skip|leave|exit)\s*(\S*)\s*$#) {
        my $uin = $1 || $sender;
        if ($config->{'members'}->{$uin}) {
            $oscar->send_im($sender, "You left group chat.");
            delete ($config->{'members'}->{$uin});
        } else {
            $oscar->send_im($sender, "UIN $uin is not member of group"
+);
        }
        save_config();
        return;
    }

    if ($message =~ m#^!config#) {
        read_config();
        $oscar->send_im($sender, "Configuration reloaded.");
        return;
    }

    if ($message =~ m#^!help#) {
        $oscar->send_im($sender, "Confused? !nick [nickname], !leave, 
+!exit");
        return;
    }

    my $msg = $config->{'members'}->{$sender} || die "no member?";
    $msg = "[$msg] $message";

    foreach my $uin (keys %{$config->{'members'}}) {
        next if ($uin == $sender);
        print "$uin ";
        $oscar->send_im($uin, $msg);
    }
    print "\n";
}

my $oscar = Net::OSCAR->new() || die;
$oscar->loglevel(3);

read_config();

$oscar->set_callback_im_in(\&im_in);
$oscar->signon($config->{'uin'}, $config->{'passwd'}) || die "can't si
+gn on as ".$config->{'uin'};

while(1) {
    $oscar->do_one_loop();
}