package Koha::BackgroundJob::BatchUpdateBiblio;

# 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 3 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, see <http://www.gnu.org/licenses>.

use Modern::Perl;

use Koha::Biblios;
use Koha::Virtualshelves;
use Koha::SearchEngine;
use Koha::SearchEngine::Indexer;

use C4::Context;
use C4::Biblio;
use C4::MarcModificationTemplates;

use base 'Koha::BackgroundJob';

=head1 NAME

Koha::BackgroundJob::BatchUpdateBiblio - Batch update bibliographic records

This is a subclass of Koha::BackgroundJob.

=head1 API

=head2 Class methods

=head3 job_type

Define the job type of this job: batch_biblio_record_modification

=cut

sub job_type {
    return 'batch_biblio_record_modification';
}

=head3 process

Process the modification.

=cut

sub process {
    my ( $self, $args ) = @_;

    if ( $self->status eq 'cancelled' ) {
        return;
    }

    # FIXME If the job has already been started, but started again (worker has been restart for instance)
    # Then we will start from scratch and so double process the same records

    $self->start;

    my $mmtid = $args->{mmtid};
    my @record_ids = @{ $args->{record_ids} };

    my $report = {
        total_records => scalar @record_ids,
        total_success => 0,
    };
    my @messages;
    RECORD_IDS: for my $biblionumber ( sort { $a <=> $b } @record_ids ) {

        last if $self->get_from_storage->status eq 'cancelled';

        next unless $biblionumber;

        # Modify the biblio
        my $error = eval {
            my $biblio = Koha::Biblios->find($biblionumber);
            my $record = $biblio->metadata->record;
            C4::MarcModificationTemplates::ModifyRecordWithTemplate( $mmtid, $record );
            my $frameworkcode = C4::Biblio::GetFrameworkCode( $biblionumber );
            C4::Biblio::ModBiblio( $record, $biblionumber, $frameworkcode, {
                overlay_context   => $args->{overlay_context},
                skip_record_index => 1,
            });
        };
        if ( $error and $error != 1 or $@ ) { # ModBiblio returns 1 if everything as gone well
            push @messages, {
                type => 'error',
                code => 'biblio_not_modified',
                biblionumber => $biblionumber,
                error => ($@ ? "$@" : $error),
            };
        } else {
            push @messages, {
                type => 'success',
                code => 'biblio_modified',
                biblionumber => $biblionumber,
            };
            $report->{total_success}++;
        }

        $self->step;
    }

    my $indexer = Koha::SearchEngine::Indexer->new({ index => $Koha::SearchEngine::BIBLIOS_INDEX });
    $indexer->index_records( \@record_ids, "specialUpdate", "biblioserver" );

    my $data = $self->decoded_data;
    $data->{messages} = \@messages;
    $data->{report} = $report;

    $self->finish( $data );
}

=head3 enqueue

Enqueue the new job

=cut

sub enqueue {
    my ( $self, $args) = @_;

    # TODO Raise exception instead
    return unless exists $args->{mmtid};
    return unless exists $args->{record_ids};

    $self->SUPER::enqueue({
        job_size  => scalar @{$args->{record_ids}},
        job_args  => $args,
        job_queue => 'long_tasks',
    });
}

=head3 additional_report

Pass the list of lists/virtual shelves the logged in user has write permissions.

It will enable the "add modified records to list" feature.

=cut

sub additional_report {
    my ($self) = @_;

    my $loggedinuser = C4::Context->userenv ? C4::Context->userenv->{'number'} : undef;
    return {
        lists => Koha::Virtualshelves->search(
            [
                { public => 0, owner => $loggedinuser },
                { public => 1 }
            ]
        ),
    };
}

1;