#!/usr/bin/perl 
use strict;
use warnings;

use IO::Socket;

## globals
use vars qw/@buckleyisms $sock %CONF %results $hyp/;
$|=1;

$CONF{file} = shift;
if (not $CONF{file}) {
  $CONF{file}=$0;
  $CONF{file}=~s/\.pl$/\.conf/i;
}

&readconf();

$sock=&connect($CONF{server},$CONF{port});
&error("socket: $! $@") if ($sock eq "");

&send("NICK $CONF{nick}");
&send("USER $CONF{ident} 0 * :$CONF{gecos}");

&forks() if (not $CONF{debug});;

my ($auth, @buffer) ;
$auth ="";
@buffer=();
my ($from,$command,@data);
#list of friends (people who get buttified more often) and enemies (people who dont get butted.)
my (%friends, %enemies);
#frequency that normal people and friends get butted
my ($normalfrequency, $friendfrequency);
#last thing said by someone in the channel
my (@previousdata);
my ($previouschannel);
my (@channels);
my ($starttime);

my (%linestotal);
my (%timeoflastbutting);
my ($fullstring);
my $graceperiod = 240;
#pre-setting frequencies
$friendfrequency = 23;
$normalfrequency = 37;

#remove whitespace!
$CONF{channel} =~ s/\s+//;

#add friends from conf file
if (exists $CONF{friends})
{
    @_ = split(/s*,s*/,$CONF{friends});
    foreach $_ (@_)
    {
	$friends{$_} = 1;
    }
}

#add enemies from conf file
if (exists $CONF{enemies})
{
    @_ = split(/s*,s*/,$CONF{enemies});
    foreach $_ (@_)
    {
	$enemies{$_} = 1;
    }
}
getbuckleyisms();

#main execution loop
while (1) {
  #check for errors.
  &error("main: $! $@") if (($! ne "" ) || ($@ ne ""));
  #Otherwise move through the buffer.
  @buffer=split(/\n/,&gets());
  
  foreach my $thing (@buffer) {
      print "$thing\n";
      $fullstring = $thing;
      #putting the message from $thing into a full string to preserve the whitespace, just in case.
      $fullstring =~ s/(.*?)\s+(.*?)\s+(.*?)\s+(.*)/$4/;
	$fullstring =~ s/^://;
   ($from,$command,@data)=split(/\s+/,$thing);

   $from ||= '';
   $command ||= '';
   #if server pings, ping back.
   if ($from eq "PING") {
	   if ($command=~/^:\d+$/) {
	   		&send("PONG $command");
	   } else {
	  	 &send("PONG :$CONF{nick}");
	   }	   
   }
   
   &error("from server: @data") if ($from eq "ERROR");
 
  #If it has successfully connected to the server, join a channel.
   if ($command eq "001") {
     if (defined $CONF{channel})
	{
		&send("JOIN $CONF{channel}") ;
		$starttime = time;
		#&send("PRIVMSG $CONF{channel} : BUTTING SYSTEMS ONLINE!");
	}
   } 
	#otherwise, if it's a message
	elsif ($command eq "PRIVMSG") {
	#get destination of message
        my $to=shift(@data);
	#get first word of message (might be command)
        my $sub=shift(@data);
	## remove preceding ':'
	$sub=~s/^://;

	##if a user private messages the bot...
	if ($to eq $CONF{nick})
	{
		$to = $from;
		$to =~ s/^:(.*)!.*$/$1/;
		
			#!help helps a brotha out, yo
			if ($sub eq "!help")
			{
			    &send("PRIVMSG $to : Buckleybot helpfully points out the humor in the current situation.");
			}

		##if the first word in the string is equal to the password, set the user to be the admin
		if ($sub eq $CONF{pass}) {
		$auth=$from;
			 &send("PRIVMSG $to : ADMIN POWERS ENABLED!!");
		}

		##ADMIN FUNCTIONS
		 if ($auth eq $from)  {

		##if the first word is "!quote", send the string that follows to the server
		## e.g. "!quote PRIVMSG #testing : HELLO" prints out "HELLO" to #testing
			if ($sub eq "!quote" and @data >0 )
			{
				&send(@data) ;
			}
		##!echo #channel spits out whatever to the channel
			elsif ($sub eq "!echo" and @data >1 )
			{
			    $_ = shift(@data);
			    
				&send("PRIVMSG $_ :".join(" ",@data));
			}
		#!boom spits out whatever to every channel
			elsif ($sub eq "!boom" and @data > 0)
			{
			    &send("PRIVMSG $CONF{channel} :".join(" ",@data));
			}
			elsif ($sub eq "!join" and @data > 0)
			{
			    $CONF{channel} = $CONF{channel}.",";
			    $CONF{channel} = $CONF{channel}.$data[0];
			    &send("JOIN $data[0]");
			}
			elsif ($sub eq "!leave" and @data > 0)
			{
			    $CONF{channel} =~ s/$data[0]//;
			    &send("PART $data[0]");
			}
			elsif ($sub eq "!reset" )
			{
			    getbuckleyisms();
			}
		
			
		}
	}
	#if messages come from channel, start buttifying
      elsif ($to =~ /^#/ )  {
	  
	  my $sender = $from;
	  $sender =~ s/^:(.*)!.*$/$1/;
		##ignores statements from cout and users containing the word "bot"
              if (($from !~/^:cout/) && ($from !~/^:[^!]*bot[^!]*!/i)) {
	      if ($sub eq "!buckley") {
		  &send("PRIVMSG $to :".join(" ",&buckleyism()));
	      }
	      if ($sub eq "!addbuckley" and @data > 0) {
		   $fullstring =~ s/!addbuckley\s+//;
			addbuckleyism($fullstring);
		}
		
	 }
	 }
   }
 }
}

sub buckleyism{
	return $buckleyisms[int(rand(@buckleyisms))];
}

#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#THIS IS WHERE IT BLOWS UP!!!!!!!
#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

sub addbuckleyism{
	push @buckleyisms, $_[0];
	$_[0] = $_[0] . "\n";

	open(FILE2, ">>buckleys.txt");
	print FILE2 $_[0];
	close FILE2;
}

sub connect {
  my ($remote_host,$remote_port,$local_host)=(shift,shift,shift);
  my $socket=IO::Socket::INET->new( PeerAddr => $remote_host,
                                 PeerPort => $remote_port,
                                 proto    => "tcp",
                                 Type     => SOCK_STREAM,
                                 Timeout  => 10
                                 );
  return $socket;
}

sub gets {
  my $data = "";
  $sock->recv($data,1024) ;
#or &error("get: $! $@");
  return $data;
}
sub send {
  my ($text) = join(" ",@_);
  $text.="\n";
  $sock->send($text);
}

sub forks {
my $spoon=fork();
  if (defined $spoon) {
    if ($spoon==0) {
    return;
    } else {
    print "exiting, child pid=$spoon\n";
    exit;
    }
  } else {
    &error("fork: $! $@");
  }
}

sub error {
    print "\nerror: @_\n";
    exit;
}

sub readconf {
  our %CONF;
  my ($conffile)=@_;
  open(CONF,"$CONF{file}") or &error("readconf: cannot open $CONF{file}");
  while (my $line=<CONF>) {
    if (substr($line,0,1) ne "#") {
     if ($line =~/^\s*([^\s]+)\s*=\s*(.+)$/) {
        $CONF{lc($1)}=$2;
      }
     }
  }   
  close(CONF);
}

#open buckleys.txt and read in all the lines
sub getbuckleyisms{
	@buckleyisms = ();
	open(FILE1, "buckleys.txt");
	while (my $line= <FILE1>){
		push(@buckleyisms, $line);
	}
	close FILE1;
}