package Koha::Item;

# Copyright ByWater Solutions 2014
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

use Modern::Perl;

use Carp;
use List::MoreUtils qw(any);

use Koha::Database;
use Koha::DateUtils qw( dt_from_string );

use C4::Context;

use Koha::Checkouts;
use Koha::IssuingRules;
use Koha::Item::Transfer::Limits;
use Koha::Item::Transfers;
use Koha::Patrons;
use Koha::Libraries;
use Koha::StockRotationItem;
use Koha::StockRotationRotas;

use base qw(Koha::Object);

=head1 NAME

Koha::Item - Koha Item object class

=head1 API

=head2 Class methods

=cut

=head3 effective_itemtype

Returns the itemtype for the item based on whether item level itemtypes are set or not.

=cut

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

    return $self->_result()->effective_itemtype();
}

=head3 home_branch

=cut

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

    $self->{_home_branch} ||= Koha::Libraries->find( $self->homebranch() );

    return $self->{_home_branch};
}

=head3 holding_branch

=cut

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

    $self->{_holding_branch} ||= Koha::Libraries->find( $self->holdingbranch() );

    return $self->{_holding_branch};
}

=head3 biblio

my $biblio = $item->biblio;

Return the bibliographic record of this item

=cut

sub biblio {
    my ( $self ) = @_;
    my $biblio_rs = $self->_result->biblio;
    return Koha::Biblio->_new_from_dbic( $biblio_rs );
}

=head3 biblioitem

my $biblioitem = $item->biblioitem;

Return the biblioitem record of this item

=cut

sub biblioitem {
    my ( $self ) = @_;
    my $biblioitem_rs = $self->_result->biblioitem;
    return Koha::Biblioitem->_new_from_dbic( $biblioitem_rs );
}

=head3 checkout

my $checkout = $item->checkout;

Return the checkout for this item

=cut

sub checkout {
    my ( $self ) = @_;
    my $checkout_rs = $self->_result->issue;
    return unless $checkout_rs;
    return Koha::Checkout->_new_from_dbic( $checkout_rs );
}

=head3 holds

my $holds = $item->holds();
my $holds = $item->holds($params);
my $holds = $item->holds({ found => 'W'});

Return holds attached to an item, optionally accept a hashref of params to pass to search

=cut

sub holds {
    my ( $self,$params ) = @_;
    my $holds_rs = $self->_result->reserves->search($params);
    return Koha::Holds->_new_from_dbic( $holds_rs );
}

=head3 get_transfer

my $transfer = $item->get_transfer;

Return the transfer if the item is in transit or undef

=cut

sub get_transfer {
    my ( $self ) = @_;
    my $transfer_rs = $self->_result->branchtransfers->search({ datearrived => undef })->first;
    return unless $transfer_rs;
    return Koha::Item::Transfer->_new_from_dbic( $transfer_rs );
}

=head3 last_returned_by

Gets and sets the last borrower to return an item.

Accepts and returns Koha::Patron objects

$item->last_returned_by( $borrowernumber );

$last_returned_by = $item->last_returned_by();

=cut

sub last_returned_by {
    my ( $self, $borrower ) = @_;

    my $items_last_returned_by_rs = Koha::Database->new()->schema()->resultset('ItemsLastBorrower');

    if ($borrower) {
        return $items_last_returned_by_rs->update_or_create(
            { borrowernumber => $borrower->borrowernumber, itemnumber => $self->id } );
    }
    else {
        unless ( $self->{_last_returned_by} ) {
            my $result = $items_last_returned_by_rs->single( { itemnumber => $self->id } );
            if ($result) {
                $self->{_last_returned_by} = Koha::Patrons->find( $result->get_column('borrowernumber') );
            }
        }

        return $self->{_last_returned_by};
    }
}

=head3 can_article_request

my $bool = $item->can_article_request( $borrower )

Returns true if item can be specifically requested

$borrower must be a Koha::Patron object

=cut

sub can_article_request {
    my ( $self, $borrower ) = @_;

    my $rule = $self->article_request_type($borrower);

    return 1 if $rule && $rule ne 'no' && $rule ne 'bib_only';
    return q{};
}

=head3 hidden_in_opac

my $bool = $item->hidden_in_opac({ [ rules => $rules ] })

Returns true if item fields match the hidding criteria defined in $rules.
Returns false otherwise.

Takes HASHref that can have the following parameters:
    OPTIONAL PARAMETERS:
    $rules : { <field> => [ value_1, ... ], ... }

Note: $rules inherits its structure from the parsed YAML from reading
the I<OpacHiddenItems> system preference.

=cut

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

    my $rules = $params->{rules} // {};

    return 1
        if C4::Context->preference('hidelostitems') and
           $self->itemlost > 0;

    my $hidden_in_opac = 0;

    foreach my $field ( keys %{$rules} ) {

        if ( any { $self->$field eq $_ } @{ $rules->{$field} } ) {
            $hidden_in_opac = 1;
            last;
        }
    }

    return $hidden_in_opac;
}

=head3 can_be_transferred

$item->can_be_transferred({ to => $to_library, from => $from_library })
Checks if an item can be transferred to given library.

This feature is controlled by two system preferences:
UseBranchTransferLimits to enable / disable the feature
BranchTransferLimitsType to use either an itemnumber or ccode as an identifier
                         for setting the limitations

Takes HASHref that can have the following parameters:
    MANDATORY PARAMETERS:
    $to   : Koha::Library
    OPTIONAL PARAMETERS:
    $from : Koha::Library  # if not given, item holdingbranch
                           # will be used instead

Returns 1 if item can be transferred to $to_library, otherwise 0.

To find out whether at least one item of a Koha::Biblio can be transferred, please
see Koha::Biblio->can_be_transferred() instead of using this method for
multiple items of the same biblio.

=cut

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

    my $to   = $params->{to};
    my $from = $params->{from};

    $to   = $to->branchcode;
    $from = defined $from ? $from->branchcode : $self->holdingbranch;

    return 1 if $from eq $to; # Transfer to current branch is allowed
    return 1 unless C4::Context->preference('UseBranchTransferLimits');

    my $limittype = C4::Context->preference('BranchTransferLimitsType');
    return Koha::Item::Transfer::Limits->search({
        toBranch => $to,
        fromBranch => $from,
        $limittype => $limittype eq 'itemtype'
                        ? $self->effective_itemtype : $self->ccode
    })->count ? 0 : 1;
}

=head3 article_request_type

my $type = $item->article_request_type( $borrower )

returns 'yes', 'no', 'bib_only', or 'item_only'

$borrower must be a Koha::Patron object

=cut

sub article_request_type {
    my ( $self, $borrower ) = @_;

    my $branch_control = C4::Context->preference('HomeOrHoldingBranch');
    my $branchcode =
        $branch_control eq 'homebranch'    ? $self->homebranch
      : $branch_control eq 'holdingbranch' ? $self->holdingbranch
      :                                      undef;
    my $borrowertype = $borrower->categorycode;
    my $itemtype = $self->effective_itemtype();
    my $issuing_rule = Koha::IssuingRules->get_effective_issuing_rule({ categorycode => $borrowertype, itemtype => $itemtype, branchcode => $branchcode });

    return q{} unless $issuing_rule;
    return $issuing_rule->article_requests || q{}
}

=head3 current_holds

=cut

sub current_holds {
    my ( $self ) = @_;
    my $attributes = { order_by => 'priority' };
    my $dtf = Koha::Database->new->schema->storage->datetime_parser;
    my $params = {
        itemnumber => $self->itemnumber,
        suspend => 0,
        -or => [
            reservedate => { '<=' => $dtf->format_date(dt_from_string) },
            waitingdate => { '!=' => undef },
        ],
    };
    my $hold_rs = $self->_result->reserves->search( $params, $attributes );
    return Koha::Holds->_new_from_dbic($hold_rs);
}

=head3 stockrotationitem

  my $sritem = Koha::Item->stockrotationitem;

Returns the stock rotation item associated with the current item.

=cut

sub stockrotationitem {
    my ( $self ) = @_;
    my $rs = $self->_result->stockrotationitem;
    return 0 if !$rs;
    return Koha::StockRotationItem->_new_from_dbic( $rs );
}

=head3 add_to_rota

  my $item = $item->add_to_rota($rota_id);

Add this item to the rota identified by $ROTA_ID, which means associating it
with the first stage of that rota.  Should this item already be associated
with a rota, then we will move it to the new rota.

=cut

sub add_to_rota {
    my ( $self, $rota_id ) = @_;
    Koha::StockRotationRotas->find($rota_id)->add_item($self->itemnumber);
    return $self;
}

=head3 has_pending_hold

  my $is_pending_hold = $item->has_pending_hold();

This method checks the tmp_holdsqueue to see if this item has been selected for a hold, but not filled yet and returns true or false

=cut

sub has_pending_hold {
    my ( $self ) = @_;
    my $pending_hold = $self->_result->tmp_holdsqueues;
    return $pending_hold->count ? 1: 0;
}

=head3 as_marc_field

    my $mss   = C4::Biblio::GetMarcSubfieldStructure( '', { unsafe => 1 } );
    my $field = $item->as_marc_field({ [ mss => $mss ] });

This method returns a MARC::Field object representing the Koha::Item object
with the current mappings configuration.

=cut

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

    my $mss = $params->{mss} // C4::Biblio::GetMarcSubfieldStructure( '', { unsafe => 1 } );
    my $item_tag = $mss->{'items.itemnumber'}[0]->{tagfield};

    my @subfields;

    my @columns = $self->_result->result_source->columns;

    foreach my $item_field ( @columns ) {
        my $mapping = $mss->{ "items.$item_field"}[0];
        my $tagfield    = $mapping->{tagfield};
        my $tagsubfield = $mapping->{tagsubfield};
        next if !$tagfield; # TODO: Should we raise an exception instead?
                            # Feels like safe fallback is better

        push @subfields, $tagsubfield => $self->$item_field
            if defined $self->$item_field and $item_field ne '';
    }

    my $unlinked_item_subfields = C4::Items::_parse_unlinked_item_subfields_from_xml($self->more_subfields_xml);
    push( @subfields, @{$unlinked_item_subfields} )
        if defined $unlinked_item_subfields and $#$unlinked_item_subfields > -1;

    my $field;

    $field = MARC::Field->new(
        "$item_tag", ' ', ' ', @subfields
    ) if @subfields;

    return $field;
}

=head3 to_api_mapping

This method returns the mapping for representing a Koha::Item object
on the API.

=cut

sub to_api_mapping {
    return {
        itemnumber               => 'item_id',
        biblionumber             => 'biblio_id',
        biblioitemnumber         => undef,
        barcode                  => 'external_id',
        dateaccessioned          => 'acquisition_date',
        booksellerid             => 'acquisition_source',
        homebranch               => 'home_library_id',
        price                    => 'purchase_price',
        replacementprice         => 'replacement_price',
        replacementpricedate     => 'replacement_price_date',
        datelastborrowed         => 'last_checkout_date',
        datelastseen             => 'last_seen_date',
        stack                    => undef,
        notforloan               => 'not_for_loan_status',
        damaged                  => 'damaged_status',
        damaged_on               => 'damaged_date',
        itemlost                 => 'lost_status',
        itemlost_on              => 'lost_date',
        withdrawn                => 'withdrawn',
        withdrawn_on             => 'withdrawn_date',
        itemcallnumber           => 'callnumber',
        coded_location_qualifier => 'coded_location_qualifier',
        issues                   => 'checkouts_count',
        renewals                 => 'renewals_count',
        reserves                 => 'holds_count',
        restricted               => 'restricted_status',
        itemnotes                => 'public_notes',
        itemnotes_nonpublic      => 'internal_notes',
        holdingbranch            => 'holding_library_id',
        paidfor                  => undef,
        timestamp                => 'timestamp',
        location                 => 'location',
        permanent_location       => 'permanent_location',
        onloan                   => 'checked_out_date',
        cn_source                => 'call_number_source',
        cn_sort                  => 'call_number_sort',
        ccode                    => 'collection_code',
        materials                => 'materials_notes',
        uri                      => 'uri',
        itype                    => 'item_type',
        more_subfields_xml       => 'extended_subfields',
        enumchron                => 'serial_issue_number',
        copynumber               => 'copy_number',
        stocknumber              => 'inventory_number',
        new_status               => 'new_status'
    };
}

=head2 Internal methods

=head3 _type

=cut

sub _type {
    return 'Item';
}

=head1 AUTHOR

Kyle M Hall <kyle@bywatersolutions.com>

=cut

1;