#!/usr/bin/perl
# This is a completely new Z3950 clients search using async ZOOM -TG 02/11/06
# Copyright 2000-2002 Katipo Communications
#
# This file is part of Koha.
#
# Koha 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.
#
# Koha 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
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA

use strict;
use CGI;

use C4::Auth;
use C4::Output;
use C4::Interface::CGI::Output;
use C4::Biblio;
use C4::Context;
use C4::Breeding;
use C4::Koha;
use ZOOM;

my $input = new CGI;
my $dbh = C4::Context->dbh;
my $error = $input->param('error');
my $biblionumber=$input->param('biblionumber');
$biblionumber=0 unless $biblionumber;
my $frameworkcode=$input->param('frameworkcode');
my $title = $input->param('title');
my $author = $input->param('author');
my $isbn = $input->param('isbn');
my $issn = $input->param('issn');
my $random = $input->param('random');
my $op=$input->param('op');
my $noconnection;
my $numberpending;
my $attr='';
my $term;
my $host;
my $server;
my $database;
my $port;
my $marcdata;
my @encoding;
my @results;
my $count;
my $toggle;
my $record;
my $oldbiblio;
my $dbh = C4::Context->dbh;
my $errmsg;
my @serverloop=();
my @serverhost;
my @breeding_loop = ();

my $DEBUG = 1; # if set to 1, many debug message are send on syslog.

unless ($random) { # this var is not useful anymore just kept to keep rel2_2 compatibility
    $random =rand(1000000000);
}

my ($template, $loggedinuser, $cookie)= get_template_and_user({
                template_name => "cataloguing/z3950_search.tmpl",
                query => $input,
                type => "intranet",
                authnotrequired => 1,
                flagsrequired => {catalogue => 1},
                debug => 1,
                });

$template->param(
        intranetcolorstylesheet => C4::Context->preference("intranetcolorstylesheet"),
        intranetstylesheet => C4::Context->preference("intranetstylesheet"),
        IntranetNav => C4::Context->preference("IntranetNav"),
        frameworkcode => $frameworkcode,
        );

if ($op ne "do_search"){
    my $sth=$dbh->prepare("select id,host,checked from z3950servers  order by host");
    $sth->execute();
    my $serverloop=$sth->fetchall_arrayref({});
    $template->param(isbn=>$isbn, issn=>$issn,title=>$title,author=>$author,
                        serverloop => $serverloop,
                        opsearch => "search",
                        biblionumber => $biblionumber,
                        );
    output_html_with_http_headers $input, $cookie, $template->output;
}else{
    my @id=$input->param('id');
    my @oConnection;
    my @oResult;
    my $s=0;
                            
    if ($isbn || $issn) {
		$attr='1=7';
#          warn "isbn : $isbn";
		$term=$isbn if ($isbn);
		$term=$issn if ($issn);
	} elsif ($title) {
		$attr='1=4 ';
        utf8::decode($title);
        $title=~tr/������/aaaeeeeiioouu/;
		$term=$title;
	} elsif ($author) {
		$attr='1=1003';
        utf8::decode($author);
        $author=~tr/������/aaaeeeeiioouu/;
		$term=$author;
	}

    my $query="\@attr $attr \"$term\"";	
    warn "query ".$query if $DEBUG;
    foreach my $servid (@id){
        my $sth=$dbh->prepare("select * from z3950servers where id=?");
        $sth->execute($servid);
        while ($server=$sth->fetchrow_hashref) {
            my $noconnection=0;							
            my $option1=new ZOOM::Options();
            $option1->option('async'=>1);
            $option1->option('elementSetName', 'F');
            $option1->option('databaseName',$server->{db})  ;
            $option1->option('user',$server->{userid}) if $server->{userid};
            $option1->option('password',$server->{password})  if $server->{password};
            $option1->option('preferredRecordSyntax', $server->{syntax});
            $oConnection[$s]=create ZOOM::Connection($option1) || $DEBUG && warn ("something went wrong: ".$oConnection[$s]->errmsg());
            warn ("server data",$server->{name}, $server->{port}) if $DEBUG;
            $oConnection[$s]->connect($server->{host}, $server->{port}) || $DEBUG && warn ("something went wrong: ".$oConnection[$s]->errmsg());
            $serverhost[$s]=$server->{host};
            $encoding[$s]=$server->{syntax};
            $s++;
        }## while fetch
    }# foreach
    my $nremaining = $s;
    my $firstresult=1;

    for (my $z=0 ;$z<$s;$z++){
        warn "doing the search" if $DEBUG;
        $oResult[$z] = $oConnection[$z]->search_pqf($query) || $DEBUG && warn ("somthing went wrong: " . $oConnection[$s]->errmsg());
#$oResult[$z] = $oConnection[$z]->search_pqf($query);
    }

AGAIN:
    my $k;
    my $event;
    while (($k = ZOOM::event(\@oConnection)) != 0) {
        $event = $oConnection[$k-1]->last_event();
        warn ("connection ", $k-1, ": event $event (", ZOOM::event_str($event), ")\n") if $DEBUG;
        last if $event == ZOOM::Event::ZEND;
    }

    if ($k != 0) {
        $k--;
        warn $serverhost[$k] if $DEBUG;
        my($error, $errmsg, $addinfo, $diagset) = $oConnection[$k]->error_x();
        if ($error) {
            warn "$k $serverhost[$k] error $query: $errmsg ($error) $addinfo\n" if $DEBUG;
            
        } else {
          my $numresults=$oResult[$k]->size() ;
          my $i;
          my $result='';
          if ($numresults>0){
              for ($i=0; $i<(($numresults<20) ? ($numresults) : (20)) ; $i++) {
                  my $rec=$oResult[$k]->record($i);
                  my $marcrecord;
                  $marcdata = $rec->raw();
                  $marcrecord= FixEncoding($marcdata);
  ####WARNING records coming from Z3950 clients are in various character sets MARC8,UTF8,UNIMARC etc
  ## In HEAD i change everything to UTF-8
  # In rel2_2 i am not sure what encoding is so no character conversion is done here
  ##Add necessary encoding changes to here -TG
                  my $oldbiblio = TransformMarcToKoha($dbh,$marcrecord,"");
                  $oldbiblio->{isbn} =~ s/ |-|\.//g,
                  $oldbiblio->{issn} =~ s/ |-|\.//g,
                  my ($notmarcrecord,$alreadyindb,$alreadyinfarm,$imported,$breedingid)=ImportBreeding($marcdata,1,$serverhost[$k],$encoding[$k],$random);
                  my %row_data;
                  if ($i % 2) {
                      $toggle="#ffffcc";
                  } else {
                      $toggle="white";
                  }
                  $row_data{toggle} = $toggle;
                  $row_data{server} = $serverhost[$k];
                  $row_data{isbn} = $oldbiblio->{isbn};
                  $row_data{title} =$oldbiblio->{title};
                  $row_data{author} = $oldbiblio->{author};
                  $row_data{breedingid} = $breedingid;
                  $row_data{biblionumber}=$biblionumber;
                  push (@breeding_loop, \%row_data);
              }# upto 5 results
          }#$numresults
        }
    }# if $k !=0
    $numberpending=$nremaining-1;
    $template->param(breeding_loop => \@breeding_loop, server=>$serverhost[$k],
                numberpending => $numberpending,
    );
    output_html_with_http_headers $input, $cookie, $template->output if $numberpending==0;

#  	print  $template->output  if $firstresult !=1;
    $firstresult++;

    MAYBE_AGAIN:
        if (--$nremaining > 0) {
            goto AGAIN;
        }
} ## if op=search