# Quiz script for irssi
# (C) Simon Huggins 2001
# huggie@earth.li

# 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 2 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, write to the Free Software Foundation, Inc., 59
# Temple Place, Suite 330, Boston, MA 02111-1307  USA
#
# TODO:
# 	- Do something when people quit (remove from team, readd when
# 	rejoin?)
# 	- Store questions asked in a file rather than just in memory so it
# 	can be restarted without a problem.

use strict;
use vars qw($VERSION %IRSSI);
    
use Irssi 20020217.1542 (); # Version 0.8.1
$VERSION = "0.7";
%IRSSI = (
authors     => "Simon Huggins",
contact     => "huggie-irssi\@earth.li",
name        => "Quiz",
description => "Turns irssi into a quiz bot",
license     => "GPLv2",
url         => "http://the.earth.li/~huggie/irssi/",
changed     => "Wed Apr 24 01:12:01 BST 2002",
);

use Irssi::Irc;
use Data::Dumper;

Irssi::settings_add_str("misc","quiz_admin","huggie");
Irssi::settings_add_str("misc","quiz_passwd","stuff");
Irssi::settings_add_str("misc","quiz_file","/home/huggie/.irssi/questions");

Irssi::settings_add_int("misc","quiz_qlength",60);
Irssi::settings_add_int("misc","quiz_hints",4);
Irssi::settings_add_int("misc","quiz_target_score",10);
Irssi::settings_add_int("misc","quiz_leave_concealed_chars",1);

Irssi::command("set cmd_queue_speed 2010");

{
my $s;

sub load_questions($$) {
	my ($game,$force) = @_;
	my $tag = $game->{'tag'};
	my $channel = $game->{'channel'};

	my $server = Irssi::server_find_tag($tag);

	if (!defined $server) {
		Irssi::print("Hrm, couldn't find server for tag ($tag) in load_questions");
		return;
	}

	return if $game->{'questions'} and not $force;

	my $file = Irssi::settings_get_str("quiz_file");
	if (open(QS, "<$file")) {
		@{$game->{'questions'}}=<QS>;
		close(QS);
		Irssi::print("Loaded questions");
		return 1;
	} else {
		$server->command("msg $channel Can't find quiz questions, sorry.");
		return;
	}
}

sub start_game($) {
	my $game = shift;
	my $tag = $game->{'tag'};
	my $channel = $game->{'channel'};
	my $server = Irssi::server_find_tag($tag);

	if (!defined $server) {
		Irssi::print("Hrm, couldn't find server for tag ($tag) in start_game");
		return;
	}

	Irssi::timeout_remove($game->{'timeouttag'});
	undef $game->{'timeouttag'};

	if (!keys %{$game->{'teams'}}) {
		$server->command("msg $channel Sorry no one joined!");
		$game->{'state'} = "over";
		game_over($game);
		return;
	}
	$game->{'state'} = "game";

	$server->command("msg $channel Game starts now. Questions last ".
		Irssi::settings_get_int("quiz_qlength").
		" seconds and there are ".
		(Irssi::settings_get_int("quiz_hints")-1).
		" hints.  First to reach ".
		Irssi::settings_get_int("quiz_target_score")." wins.");
	next_question($game);
}

sub show_scores($) {
	my $game = shift;
	my $tag = $game->{'tag'};
	my $channel = $game->{'channel'};
	my $server = Irssi::server_find_tag($tag);

	if (!defined $server) {
		Irssi::print("Hrm, couldn't find server for tag ($tag) in show_scores");
		return;
	}

	my (@redscorers,@bluescorers);

	foreach my $score (sort keys %{$game->{'scores'}}) {
		if ($score =~ /^blue/) {
			$score =~ s/^blue//;
			push @bluescorers, "$score(".
				$game->{'scores'}->{"blue".$score}.")";
		} else {
			$score =~ s/^red//;
			push @redscorers, "$score(".
				$game->{'scores'}->{"red".$score}.")";
		}
	}

	$server->command("msg $channel 12Blue: ".$game->{'bluescore'}
		."  ".join(",",@bluescorers));
	$server->command("msg $channel 4Red : ".$game->{'redscore'}
		."  ".join(",",@redscorers));
	
	my $ts = Irssi::settings_get_int("quiz_target_score");
	if ($game->{'bluescore'} == $ts or $game->{'redscore'} == $ts) {
		if ($game->{'bluescore'} == $ts) {
			$server->command("msg $channel 12Blue team wins ".
				$game->{'bluescore'}." to ".
				$game->{'redscore'});
		} else {
			$server->command("msg $channel 4Red team wins ".
				$game->{'redscore'}." to ".
				$game->{'bluescore'});
		}
		$game->{'state'}="over";
	} elsif ($game->{'state'} ne "over") {
		$game->{'state'}="pause";
		$server->command("msg $channel Next question in 20 seconds.");
		if ($game->{'timeouttag'}) {
			Irssi::timeout_remove($game->{'timeouttag'});
		}
		$game->{'timeouttag'} = Irssi::timeout_add(20000,
			"next_question",$game);
		$game->{'timeout'} = time() + 20;
	}
	game_over($game);
}

sub hint($) {
	my $game = shift;
	my $tag = $game->{'tag'};
	my $channel = $game->{'channel'};
	my $server = Irssi::server_find_tag($tag);

	if (!defined $server) {
		Irssi::print("Hrm, couldn't find server for tag ($tag) in hint");
		return;
	}

	return if game_over($game);
	if ($game->{'end'} <= time()) {
		$server->command("msg $channel Time's up.  The answer is: ".$game->{'answer'});
		show_scores($game);
	} else {
		$game->{'hint'}++;
		my $num = $game->{'current_answer'} =~ s/\*/*/g;
		if ($num <= Irssi::settings_get_int("quiz_leave_concealed_chars")) {
			return;
		}
		my $pos = index($game->{'current_answer'},"*");
		if ($pos >= 0) {
			$game->{'current_answer'} =~ s/\*/substr($game->{'answer'},$pos,1)/e;
		}
		my $hinttime = $game->{'hint'}*$game->{'hintlen'};
		if ($hinttime != int($hinttime)) {
			$hinttime = sprintf("%.2f", $hinttime);
		}
		$server->command("msg $channel $hinttime second hint: ".
			$game->{'current_answer'});
	}
}

sub game_over($) {
	my $game = shift;
	my $tag = $game->{'tag'};
	my $channel = $game->{'channel'};
	my $server = Irssi::server_find_tag($tag);

	if (!defined $server) {
		Irssi::print("Hrm, couldn't find server for tag ($tag) in game_over");
		return;
	}

	if ($game->{'state'} eq "over") {
		Irssi::timeout_remove($game->{'timeouttag'});
		undef $game->{'timeouttag'};
		undef $game->{'state'};
		undef $game->{'teams'};
		undef $game->{'scores'};
		$server->command("msg $channel Trivia is disabled.  Use !trivon to restart.");
		return 1;
	}
	return;
}

sub next_question($) {
	my $game = shift;
	my $tag = $game->{'tag'};
	my $channel = $game->{'channel'};
	my $server = Irssi::server_find_tag($tag);

	if (!defined $server) {
		Irssi::print("Hrm, couldn't find server for tag ($tag) in next_question");
		return;
	}

	my $len = Irssi::settings_get_int("quiz_qlength")/
		Irssi::settings_get_int("quiz_hints");
	if ($game->{'timeouttag'}) {
		Irssi::timeout_remove($game->{'timeouttag'});
	}
	$game->{'timeouttag'} = Irssi::timeout_add($len*1000, "hint",$game);
	my $t = time();
	$game->{'timeout'} = $t + $len;
	$game->{'end'} = Irssi::settings_get_int("quiz_qlength")+$t;
	$game->{'hint'}=0;
	$game->{'hintlen'} = $len;
	if (!@{$game->{'questions'}}) {
		load_questions($game,1);
		if (!$game->{'questions'}) {
			$server->command("msg $channel Hmmm, no questions found sorry");
			$game->{'state'}="over";
		}
		Irssi::print("Questions looped");
	}
	return if game_over($game);
	my $q = splice(@{$game->{'questions'}},rand(@{$game->{'questions'}}),1);
	chomp $q;
	$q =~ s/
//;
	($game->{'answer'} = $q) =~ s/^(.*)\|//;
	$server->command("msg $channel Question:  $1");
	($game->{'current_answer'} = $game->{'answer'}) =~ s/[a-zA-Z0-9]/*/g;
	$q = s/^(.*)\|.*?$/$1/;
	$server->command("msg $channel Answer:  ".$game->{'current_answer'});
	$game->{'state'}="question";
}

sub invite_join($$) {
	my ($server,$channel) = @_;
	my $game = $s->{$server->{'tag'}}->{$channel};

	$server->command("msg $channel Team Trivia thingummie v($VERSION) starts in 1 minute.  Type 4!join red or 12!join blue");
	$game->{'timeouttag'} = Irssi::timeout_add(60000,"start_game",$game);
	$game->{'timeout'} = time()+60;
}

sub secstonormal($) {
	my $seconds = shift;
	my ($m,$s);

	$s = $seconds % 60;
	$m = ($seconds - $s)/60;
	return sprintf("%02d:%02d",$m,$s);
}

sub do_pubcommand($$$$) {
	my ($command,$channel,$server,$nick) = @_;
	my $game = $s->{$server->{'tag'}}->{$channel};

	$command = lc $command;
	$command =~ s/\s*$//;

	if ($command =~ /^!bang$/) {
		$server->command("msg $channel Dumping...");
		foreach (split /\n/,Dumper($s)) {
			Irssi::print("$_");
		}
	} elsif ($command =~ /^!trivon$/) {
		if ($s->{$server->{'tag'}}->{$channel}) {
			if ($s->{$server->{'tag'}}->{$channel}->{'state'}) {
				$server->command("msg $nick Trivia is already on.  Use !trivoff to remove it.");
				return;
			}
			#undef $s->{$server->{'tag'}}->{$channel};
		} else {
			# create structure magically
			$game = $s->{$server->{'tag'}}->{$channel} = {};
			$game->{'tag'} = $server->{'tag'};
			$game->{'channel'} = $channel;
		}
		$game->{'teams'}={};
		$game->{'redscore'} = 0;
		$game->{'bluescore'} = 0;
		load_questions($game,0);
		$game->{'state'} = "join";
		invite_join($server,$channel);
	} elsif ($command =~ /^!trivoff$/) {
		return if !$game->{'state'};
		$game->{'state'}="over";
		game_over($game);
	} elsif ($command =~ /^!join/) {
		if ($command =~ /^!join (red|blue)$/) {
			return if !$game->{'state'};
			$game->{'teams'}->{$nick}=$1;
			if ($1 eq "blue") {
				$server->command("msg $nick You have joined the 12Blue team");
			} else {
				$server->command("msg $nick You have joined the 4Red team");
			}
		}
	} elsif ($command =~ /^!teams/) {
		return if !$game->{'state'};
		my @blue=();
		my @red=();
		foreach (sort keys %{$game->{'teams'}}) {
			push @blue, $_ if $game->{'teams'}->{$_} eq "blue";
			push @red,  $_ if $game->{'teams'}->{$_} eq "red";
		}
		$server->command("msg $channel 12Blue: ".join(",",@blue));
		$server->command("msg $channel 4Red : ".join(",",@red));
	} elsif ($command =~ /^!timeleft$/) {
		if ($game->{'state'} eq "join" and $game->{'timeout'}) {
			my $diff = $game->{'timeout'} - time();
			if ($diff > 0) {
				$server->command("msg $channel Time left: ".secstonormal($diff));
			} else {
				Irssi::print("Timeleft: $diff ??");
			}
		}
	}
}

sub do_command($$$) {
	my ($command,$nick,$server) = @_;

	$command = lc $command;
	$command =~ s/\s*$//;

	if ($command =~ /^!bang$/) {
		$server->command("msg $nick BOOM!");
	} elsif ($command =~ /^admin/) {
		if ($command !~ /^admin (.*)$/) {
			$server->command("msg $nick admin needs a nick to change the admin user to!");
		} else {
			Irssi::settings_remove("quiz_admin");
			Irssi::settings_add_str("misc","quiz_admin",$1);
			$server->command("msg $nick admin user is now $1");
		}
	} else {
		$server->command("msg $nick Unknown command '$command'");
	}
}

sub check_answer($$$$) {
	my ($server,$channel,$nick,$text) = @_;
	my $game = $s->{$server->{'tag'}}->{$channel};

	return if not exists $game->{'teams'}->{$nick};

	$text =~ s/\s*$//;

	if (lc $text eq lc $game->{'answer'}) {
		$server->command("msg $channel Correct answer by ".
		($game->{'teams'}->{$nick} eq "blue"?"12":"4").
		$nick.": ".$game->{'answer'});
		$game->{'state'}="won";
		$game->{$game->{'teams'}->{$nick}."score"}++;
		$game->{'scores'}->{$game->{'teams'}->{$nick}.$nick}++;
		show_scores($game);
		return;
	}

	my $show=0;
	my @chars = split //,$text;

	for (my $i=0; $i<length($game->{'answer'}); $i++) {
		if (lc $chars[$i] eq lc substr($game->{'answer'},$i,1)) {
			$show = 1 if substr($game->{'current_answer'},$i,1)
				eq "*";
			substr($game->{'current_answer'},$i,1) =
				substr($game->{'answer'},$i,1);
		}
	}
	$server->command("msg $channel Answer: ".$game->{'current_answer'})
		if $show;
}

sub event_privmsg {
	my ($server,$data,$nick,$address) = @_;
	my ($target, $text) = split / :/,$data,2;
	my ($command);

	if ($target =~ /^#/) {
		my $game = $s->{$server->{'tag'}}->{$target};
		if ($text =~ /^!/) {
			do_pubcommand($text,$target,$server,$nick);
		} elsif ($game->{'state'} eq "question") {
			check_answer($server,$target,$nick,$text);
		}
	} else {
		if ($nick ne Irssi::settings_get_str("quiz_admin")) {
			my ($passwd);
			($passwd, $command) = split /\s/,$text,2;
			if ($passwd ne Irssi::settings_get_str("quiz_passwd")) {
				Irssi::print("$nick tried to do $command but got the password wrong.");
			}
		} else {
			$command = $text;
		}
		do_command($command,$nick,$server);
	}
}

sub event_changed_nick {
	my ($channel,$nick,$oldnick) = @_;
	my $server = $channel->{'server'};
	my $game = $s->{$server->{'tag'}}->{$channel->{'name'}};

	return if !$game->{'state'};
	
	my $nicktxt = $nick->{'nick'};
	if ($game->{'teams'}->{$oldnick}) {
		$game->{'teams'}->{$nicktxt} = $game->{'teams'}->{$oldnick};
		delete $game->{'teams'}->{$oldnick};
	}
}

}

Irssi::signal_add_last("event privmsg", "event_privmsg");
Irssi::signal_add("nicklist changed", "event_changed_nick");