#!/usr/bin/perl

# This file is part of Koha.
#
# Copyright (C) 2020  Fenway Library Organization
#
# 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 CGI qw( -utf8 );
use List::MoreUtils qw( uniq );

use C4::Auth qw( get_template_and_user );
use C4::Circulation qw( barcodedecode );
use C4::Output qw( output_html_with_http_headers );
use C4::CourseReserves qw( GetCourse GetCourseItem GetItemCourseReservesInfo DelCourse DelCourseReserve );

use Koha::Items;

my $cgi = CGI->new;

my $action    = $cgi->param('action')    || q{};
my $barcodes  = $cgi->param('barcodes')  || q{};

my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name   => "course_reserves/batch_rm_items.tt",
        query           => $cgi,
        type            => "intranet",
        flagsrequired   => { coursereserves => 'delete_reserves' },
    }
);

if ( !$action ) {
    $template->param( action => 'display_form' );
}

elsif ( $action eq 'batch_rm' ) {
    my @barcodes = uniq( split (/\s\n/, $barcodes ) );
    my @invalid_barcodes;
    my @item_and_count;

    foreach my $bar (@barcodes) {
        $bar = barcodedecode($bar) if $bar;
        my $item = Koha::Items->find( { barcode => $bar } );
        if($item) {
            my $courseitem = GetCourseItem(itemnumber => $item->id);
            if($courseitem) {

                my $res_info = GetItemCourseReservesInfo(itemnumber => $item->id);

                my $no_of_res = @$res_info;

                my $delitemcount = {'delitem' => $item, 'delcount' => $no_of_res};
                push ( @item_and_count, $delitemcount );

                foreach my $cr (@$res_info) {
                    if($cr->{cr_id}) {
                        DelCourseReserve('cr_id' => $cr->{cr_id});
                    }
                }
            }
            else {
                push( @invalid_barcodes, $bar);
            }
        }
        else {
            push( @invalid_barcodes, $bar );
        }

    }

    $template->param(
        action => 'display_results',
        invalid_barcodes => \@invalid_barcodes,
        item_and_count => \@item_and_count,
    );
}

output_html_with_http_headers $cgi, $cookie, $template->output;