#!/usr/bin/perl
use Modern::Perl;
use Getopt::Long;
use C4::Context;
use C4::Biblio;
use C4::Items;
use MARC::Record;
use MARC::Field;
use Data::Dumper;
use Time::HiRes qw(gettimeofday);
use Pod::Usage;

=head1 NAME

batchRebuildBiblioTables.pl - rebuilds the non-MARC DB items table from the MARC values

You can/must use it when you change items mapping.

=head1 SYNOPSIS

batchRebuildItemsTables.pl [ -h ][ -c ][ -t ][ --where ]

 Options:
   -h --help       (or without arguments) shows this help message
   -c              Confirm: rebuild non marc DB (may be long)
   -t              test only, change nothing in DB
   --where         add where condition on default query (eg. --where 'biblio.biblionumber<100')

=cut


my $count = 0;
my $errorcount = 0;
my $starttime = gettimeofday;
my @errors;
my %opt;
my ($confirm, $help, $test_parameter, $where);
GetOptions(
    'c' => \$confirm,
    'help|h' => \$help,
    't' => \$test_parameter,
    'where:s' => \$where,
) or pod2usage(2);

pod2usage(1) if ($help || (!$confirm));
print "### Database will not be modified ###\n" if $test_parameter;
#dbh
my $dbh = C4::Context->dbh;
$dbh->{AutoCommit} = 0;
#sysprefs
C4::Context->disable_syspref_cache() if ( defined( C4::Context->disable_syspref_cache() ) );
my $CataloguingLog = C4::Context->preference('CataloguingLog');
my $dontmerge = C4::Context->preference('dontmerge');
$dontmerge="0" unless defnonull($dontmerge);
$dbh->do("UPDATE systempreferences SET value=0 WHERE variable='CataloguingLog'");
$dbh->do("UPDATE systempreferences SET value=1 where variable='dontmerge'");
$dbh->commit() unless $test_parameter;
my ($itemfield,$itemnumbersubfield) = &GetMarcFromKohaField("items.itemnumber",'');
#dbh query init
my $query = qq{SELECT biblio.biblionumber AS biblionumber, biblioitems.biblioitemnumber AS biblioitemnumber, biblio.frameworkcode AS frameworkcode FROM biblio JOIN biblioitems ON biblio.biblionumber=biblioitems.biblionumber};
$query.=qq{ WHERE $where } if ($where);

my $sth = $dbh->prepare($query);
$sth->execute();
while ( my ( $biblionumber, $biblioitemnumber, $frameworkcode ) = $sth->fetchrow )
{
    $count++;
    warn $count unless $count %1000;
    my $extkey;
    my $record = GetMarcBiblio($biblionumber,1);
    unless ($record){ push @errors, "bad record biblionumber $biblionumber"; next; }
    my ($tmptestfields,$tmptestdirectory,$reclen,$tmptestbaseaddress) = MARC::File::USMARC::_build_tag_directory($record);
    #print "\n################################ record before ##################################\n".$record->as_formatted;#!test
    unless ($test_parameter) {
        my $rqitemnumber=$dbh->prepare("SELECT itemnumber, biblionumber from items where itemnumber = ? and biblionumber = ?");
        foreach my $itemfield ($record->field($itemfield)){
            my $marcitem=MARC::Record->new();
            $marcitem->encoding('UTF-8');
            $marcitem->append_fields($itemfield);
            my $itemnum; my @itemnumbers = $itemfield->subfield($itemnumbersubfield);
            foreach my $itemnumber ( @itemnumbers ){
                $rqitemnumber->execute($itemnumber, $biblionumber);
                if( my $row = $rqitemnumber->fetchrow_hashref ){ $itemnum = $row->{itemnumber};}
            }
            eval{ if($itemnum){ ModItemFromMarc($marcitem,$biblionumber,$itemnum) }else{ die("$biblionumber"); } };
            if ($@){ warn "Problem with : $biblionumber : $@"; warn $record->as_formatted; }
        }
    }
    unless ($test_parameter) {
        $dbh->commit() unless $count %1000;
    }
}

my $sthCataloguingLog = $dbh->prepare("UPDATE systempreferences SET value=? WHERE variable='CataloguingLog'");
$sthCataloguingLog->execute($CataloguingLog);
my $sthdontmerge = $dbh->prepare("UPDATE systempreferences SET value=? WHERE variable='dontmerge'");
$sthdontmerge->execute($dontmerge);
$dbh->commit() unless $test_parameter;
my $timeneeded = time() - $starttime;
print "$count MARC record done in $timeneeded seconds\n";
if (scalar(@errors) > 0) {
    print "Some biblionumber could not be processed though: ", join(" ", @errors);
}

sub defnonull { my $var = shift; defined $var and $var ne "" }
__END__