#!/usr/bin/perl -w
#
# This script is used to remove all duplicate barcodes.
#
use strict;
use DBI;
use lib "/www/opals/module";

use MARC::Record;
use MARC::Field;
use MARC::File::XML;
use MARC::File::USMARC;
use Opals::Marc::Record;


use Getopt::Std;
use POSIX qw(
    ceil
    floor
);
my %options = ();
getopts("c:",\%options);
my $configFile = $options{c};
if (!$configFile || ! -f $configFile) {
    print "Usage: $0 -c CONFIG_FILE\n";
    exit 1;
}
#
my $config = loadConfig($configFile);
my $dbh = makeConnection($config);
END {
    if ($dbh) {
        $dbh->disconnect();
    }
}

$| = 1;

my $zRoot   = $config->{'zRoot'};
my $zPort   = $config->{'zPort'};
my $zDatabase = $config->{'zDatabase'};



my $sth = $dbh->prepare(<<_SQL_);

select   distinct rid 
from     opl_item 
_SQL_

    $sth->execute;
    my $count =0;
    while (my ($rid) = $sth->fetchrow_array) {
        if($rid){
            print "$rid\n";
            cp250at0852c($dbh,$rid);
        }
    }
    $sth->finish;

############################################################
sub cp250at0852c{
    my($dbh,$rid,$prefix) =@_;

    my $marcXml = getMarcXml($rid);  
    return if ($marcXml eq '');
    my $marc = Opals::Marc::Record::newFromXml($marcXml);
    my $sf250a =$marc->subfield( '250', 'a');
    if($sf250a && $sf250a ne ''){
        update852c($marc,$sf250a);
        saveRecord($rid,$marc);
    }
 }
############################################################

sub update852c{
    my($marc,$data)=@_;
    my @fields = $marc->field('852');
    foreach my $f852(@fields){
        if(defined $f852->subfield('c')){
            $f852->update('c' => $data );
        }
        else{
            $f852->add_subfields( 'c' => $data );
        }
    }
}

############################################################

sub getMarcXml{
    my ($rid)=@_;
    my $dir  = "$zRoot/$zPort/record/$zDatabase/" . ceil($rid/1000);
    my $xml = '';
    if (-f "$dir/$rid.xml") {
        open  RECORD, "<$dir/$rid.xml";
        while (<RECORD>) {
            $xml .= $_;
        }
        close RECORD;
    }
    return $xml;
}

############################################################

sub saveRecord{
    my ($rid,$marc)=@_;
    my $dir  = "$zRoot/$zPort/record/$zDatabase/" . ceil($rid/1000);
    if (-f "$dir/$rid.xml") {
        my $xml = MARC::File::XML::record($marc);
        open  RECORD, ">$dir/$rid.xml";
        print RECORD $xml;
        close RECORD;
    }
}


############################################################
sub makeConnection {
    my ($config) = @_;
    if (!$config) {
        return;
    }
    my ($db_driver, $db_name, $db_host, $db_port, $db_user, $db_password);

    $db_driver   = $config->{'db_driver'} || 'mysql';
    $db_name     = $config->{'db_name'};
    $db_host     = $config->{'db_host'};
    $db_port     = $config->{'db_port'}   || '3306';
    $db_user     = $config->{'db_user'};
    $db_password = $config->{'db_password'};

    my $dsn = "dbi:$db_driver:$db_name:$db_host:$db_port";

    return DBI->connect($dsn, $db_user, $db_password);
}


############################################################
sub loadConfig {
    my ($configFile) = @_;
#    print "Enter the config filename of Opals: ";
#    $configFile = <STDIN>;
    my $config = {};

    open CONF, $configFile || die "Cannot open file $configFile";
    while (<CONF>) {
        chomp;
        s/#.*//;                # remove comments
        next if /^\s*$/;        # ignore blank lines

        if (/^\s*(\w+)\s*=\s*(.*?)\s*$/) {
            $config->{$1} = $2;
        }
    }
    close CONF;
    
    return $config;
}
############################################################


exit 0;