package Koha::ILL::Request::Workflow::HistoryCheck;

# Copyright 2024 PTFS Europe Ltd
#
# 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::I18N qw(__);

use base qw(Koha::ILL::Request::Workflow);

=head1 NAME

Koha::ILL::Request::HistoryCheck - Koha ILL HistoryCheck

=head1 SYNOPSIS

Object-oriented class that provides the ILL request type disclaimer

=head1 DESCRIPTION

This class provides the ability to verify if it should render type disclaimer
and handle the template params accordingly

=head1 API

=head2 Class Methods

=head3 show_history_check

    my $show_history_check =
    Koha::ILL::Request::HistoryCheck->show_history_check($params);

Given $params, return true if history check should be shown

=cut

sub show_history_check {
    my ( $self, $request ) = @_;

    return

        # ILLHistoryCheck is enabled
        C4::Context->yaml_preference("ILLHistoryCheck")

        # Matching requests were found
        && $self->_find_matching_requests()

        # History check has not yet been submitted
        && !$self->{metadata}->{history_check_submitted}

        # The form has been submitted and the backend is able to create the request
        && $request->_backend_capability( 'can_create_request', $self->{metadata} );
}

=head3 history_check_template_params

    my $history_check_template_params =
    Koha::ILL::Request::TypeDisclaimer->history_check_template_params(
        $params);

Given $params, return true if history check should be rendered

=cut

sub history_check_template_params {
    my ( $self, $params ) = @_;

    $params->{method} = 'historycheck' if $self->{ui_context} eq 'staff';
    delete $params->{stage}            if $self->{ui_context} eq 'staff';

    $params->{cardnumber} = C4::Context->userenv->{'cardnumber'} || 0 if $self->{ui_context} eq 'opac';

    my $backend        = Koha::ILL::Request->new->load_backend( $params->{backend} );
    my $fields_mapping = {
        cardnumber => __('Cardnumber'),
        branchcode => __('Library'),
        backend    => __('Backend'),
    };
    my $mapping_function;
    eval {
        my $backend_mapping = $backend->{_my_backend}->_get_core_fields();
        $fields_mapping   = { %$fields_mapping, %$backend_mapping };
        $mapping_function = sub { return $fields_mapping->{ $_[0] } };
    };
    if ($@) {
        $mapping_function = sub { return $fields_mapping->{ $_[0] } };
    }

    my @sorted_params = sort {
        my $a_val = $mapping_function->($a) // $a;
        my $b_val = $mapping_function->($b) // $b;
        lc($a_val) cmp lc($b_val)
    } keys %$params;

    @sorted_params = map {
        { $_ => $params->{$_} }
    } @sorted_params;

    my $matching_requests_for_patron = $self->_find_matching_requests();

    return (
        whole                        => $params,
        metadata                     => $self->prep_metadata($params),
        matching_requests_for_patron => $matching_requests_for_patron,
        $self->{ui_context} eq 'staff'
        ? (
            sorted_params      => \@sorted_params,
            key_mapping        => $mapping_function,
            request_patron_obj => Koha::Patrons->find( { cardnumber => $params->{cardnumber} } )
            )
        : (),
        $self->{ui_context} eq 'opac'
        ? (
            illrequestsview => 1,
            message         => $params->{message},
            op              => 'historycheck',
            )
        : ()
    );
}

=head3 after_request_created

    $history_check->after_request_created($params, $request);

Actions that need to be done after the request has been created

=cut

sub after_request_created {
    my ( $self, $params, $request ) = @_;

    return if ( $self->{ui_context} ne 'opac' );

    my $patron_cardnumber            = C4::Context->userenv->{'cardnumber'} || 0;
    my $matching_requests_for_patron = $self->_find_matching_requests();

    my $historycheck_requests;
    if ($matching_requests_for_patron) {
        foreach my $matching_request ( @{$matching_requests_for_patron} ) {
            next if $matching_request->illrequest_id eq $request->illrequest_id;
            $historycheck_requests .=
                $historycheck_requests ? '|' . $matching_request->illrequest_id : $matching_request->illrequest_id;
        }
    }

    $request->extended_attributes(
        [
            {
                type  => 'historycheck_requests',
                value => $historycheck_requests,
            },
        ]
    ) if $historycheck_requests;
}

=head3 _find_matching_requests

    my $matching_requests = $self->_find_matching_requests();

Returns a list of matching requests (match is done by doi, isbn, pubmedid)

=cut

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

    my @id_fields = ( 'doi', 'isbn', 'pubmedid' );

    my @existing_id_fields = grep { $self->{metadata}->{$_} } @id_fields;
    return 0 unless scalar @existing_id_fields;

    if ( grep { $_ eq 'doi' } @existing_id_fields ) {
        @existing_id_fields = grep { $_ eq 'doi' } @existing_id_fields;
    }

    if ( grep { $_ eq 'pubmedid' } @existing_id_fields ) {
        @existing_id_fields = grep { $_ eq 'pubmedid' } @existing_id_fields;
    }

    my $cardnumber =
        $self->{metadata}->{cardnumber} || ( C4::Context->userenv && C4::Context->userenv->{'cardnumber'} );
    return 0 unless $cardnumber;

    my $patron = Koha::Patrons->find( { cardnumber => $cardnumber } );
    return 0 unless $patron;

    my $query;
    $query->{'-and'} = [ { 'me.borrowernumber' => $patron->borrowernumber } ];
    foreach my $id_field (@existing_id_fields) {
        push @{ $query->{'-or'} }, {
            'illrequestattributes.type'  => $id_field,
            'illrequestattributes.value' => $self->{metadata}->{$id_field},
        };
    }

    my $matching_requests = Koha::ILL::Requests->search(
        $query,
        {
            join     => 'illrequestattributes',
            distinct => 'illrequest_id',
        }
    );

    return $matching_requests->count ? $matching_requests->as_list : 0;
}

=head1 AUTHOR

Pedro Amorim <pedro.amorim@ptfs-europe.com>

=cut

1;