#!/usr/bin/perl

# Copyright 2000-2002 Katipo Communications
#
# 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 CGI        qw ( -utf8 );
use POSIX      qw( strftime );
use C4::Auth   qw( get_template_and_user );
use C4::Output qw( output_html_with_http_headers );
use C4::AuthoritiesMarc
    qw( AddAuthority ModAuthority GetAuthority GetTagsLabels GetAuthMARCFromKohaField FindDuplicateAuthority );
use C4::Context;
use Date::Calc qw( Today );
use MARC::File::USMARC;
use MARC::File::XML;
use C4::Biblio qw( TransformHtmlToMarc );
use Koha::Authority::Types;
use Koha::Import::Records;
use Koha::ItemTypes;
use vars qw( $tagslib);
use vars qw( $authorised_values_sth);
use vars qw( $is_a_modif );

our ( $authorised_values_sth, $is_a_modif, $usedTagsLib, $mandatory_z3950 );

=head1 FUNCTIONS

=over

=item build_authorized_values_list

builds list, depending on authorised value...

=cut

sub build_authorized_values_list {
    my ( $tag, $subfield, $value, $dbh, $authorised_values_sth, $index_tag, $index_subfield ) = @_;

    my @authorised_values;
    my %authorised_lib;

    my $category = $tagslib->{$tag}->{$subfield}->{'authorised_value'};
    push @authorised_values, q{} unless $tagslib->{$tag}->{$subfield}->{mandatory} && $value;

    if ( $category eq "branches" ) {
        my $sth = $dbh->prepare("select branchcode,branchname from branches order by branchname");
        $sth->execute;
        while ( my ( $branchcode, $branchname ) = $sth->fetchrow_array ) {
            push @authorised_values, $branchcode;
            $authorised_lib{$branchcode} = $branchname;
        }
    } elsif ( $category eq "itemtypes" ) {
        my $itemtypes = Koha::ItemTypes->search_with_localization;
        while ( my $itemtype = $itemtypes->next ) {
            push @authorised_values, $itemtype->itemtype;
            $authorised_lib{ $itemtype->itemtype } = $itemtype->translated_description;
        }
    } else {    # "true" authorised value
        $authorised_values_sth->execute( $tagslib->{$tag}->{$subfield}->{authorised_value} );
        while ( my ( $value, $lib ) = $authorised_values_sth->fetchrow_array ) {
            push @authorised_values, $value;
            $authorised_lib{$value} = $lib;
        }
    }

    return {
        type    => 'select',
        id      => "tag_" . $tag . "_subfield_" . $subfield . "_" . $index_tag . "_" . $index_subfield,
        name    => "tag_" . $tag . "_subfield_" . $subfield . "_" . $index_tag . "_" . $index_subfield,
        values  => \@authorised_values,
        labels  => \%authorised_lib,
        default => $value,
        ( ( grep { $_ eq $category } (qw(branches itemtypes cn_source)) ) ? () : ( category => $category ) ),
    };
}

=item create_input

builds the <input ...> entry for a subfield.

=cut

sub create_input {
    my ( $tag, $subfield, $value, $index_tag, $rec, $authorised_values_sth, $cgi ) = @_;

    my $index_subfield = CreateKey();    # create a specific key for each subfield

    # determine maximum length; 9999 bytes per ISO 2709 except for leader and MARC21 008
    my $max_length = 9999;
    if ( $tag eq '000' ) {
        $max_length = 24;
    } elsif ( $tag eq '008' and C4::Context->preference('marcflavour') eq 'MARC21' ) {
        $max_length = 40;
    }

    # Apply optional framework default value when it is a new record,
    # or when editing as new (duplicating a record),
    # based on the ApplyFrameworkDefaults setting.
    # Substitute date parts, user name
    my $applydefaults = C4::Context->preference('ApplyFrameworkDefaults');
    if (
        $value eq ''
        && (   ( $applydefaults =~ /new/ && !$cgi->param('authid') )
            || ( $applydefaults =~ /duplicate/ && $cgi->param('op') eq 'duplicate' )
            || ( $applydefaults =~ /imported/  && $cgi->param('breedingid') ) )
        )
    {
        $value = $tagslib->{$tag}->{$subfield}->{defaultvalue};
        if ( !defined $value ) {
            $value = q{};
        }

        # get today date & replace YYYY, MM, DD if provided in the default value
        my ( $year, $month, $day ) = Today();
        $month = sprintf( "%02d", $month );
        $day   = sprintf( "%02d", $day );
        $value =~ s/YYYY/$year/g;
        $value =~ s/YY/substr($year,2)/eg;
        $value =~ s/MM/$month/g;
        $value =~ s/DD/$day/g;
    }
    my $dbh = C4::Context->dbh;

    # map '@' as "subfield" label for fixed fields
    # to something that's allowed in a div id.
    my $id_subfield = $subfield;
    $id_subfield = "00" if $id_subfield eq "@";

    my %subfield_data = (
        tag           => $tag,
        subfield      => $id_subfield,
        marc_lib      => $tagslib->{$tag}->{$subfield}->{lib},
        tag_mandatory => $tagslib->{$tag}->{mandatory},
        mandatory     => $tagslib->{$tag}->{$subfield}->{mandatory},
        repeatable    => $tagslib->{$tag}->{$subfield}->{repeatable},
        kohafield     => $tagslib->{$tag}->{$subfield}->{kohafield},
        index         => $index_tag,
        id            => "tag_" . $tag . "_subfield_" . $id_subfield . "_" . $index_tag . "_" . $index_subfield,
        value         => $value,
        random        => CreateKey(),
    );

    if ( exists $mandatory_z3950->{ $tag . $subfield } ) {
        $subfield_data{z3950_mandatory} = $mandatory_z3950->{ $tag . $subfield };
    }

    $subfield_data{visibility} = "display:none;"
        if ( $tagslib->{$tag}->{$subfield}->{hidden} and $value ne ''
        or ( $value eq '' and !$tagslib->{$tag}->{$subfield}->{mandatory} ) );

    # it's an authorised field
    if ( $tagslib->{$tag}->{$subfield}->{authorised_value} ) {
        $subfield_data{marc_value} = build_authorized_values_list(
            $tag, $subfield, $value, $dbh,
            $authorised_values_sth, $index_tag, $index_subfield
        );

        # it's a thesaurus / authority field
    } elsif ( $tagslib->{$tag}->{$subfield}->{authtypecode} ) {
        $subfield_data{marc_value} = {
            type         => 'text1',
            id           => $subfield_data{id},
            name         => $subfield_data{id},
            value        => $value,
            authtypecode => $tagslib->{$tag}->{$subfield}->{authtypecode},
        };
    } elsif ( $tagslib->{$tag}->{$subfield}->{'value_builder'} ) {    # plugin
        require Koha::FrameworkPlugin;
        my $plugin = Koha::FrameworkPlugin->new(
            {
                name => $tagslib->{$tag}->{$subfield}->{'value_builder'},
            }
        );
        my $pars = {
            dbh => $dbh, record => $rec, tagslib => $tagslib,
            id  => $subfield_data{id}
        };
        $plugin->build($pars);
        if ( !$plugin->errstr ) {
            $subfield_data{marc_value} = {
                type       => 'text2',
                id         => $subfield_data{id},
                name       => $subfield_data{id},
                value      => $value,
                maxlength  => $max_length,
                javascript => $plugin->javascript,
                noclick    => $plugin->noclick,
                plugin     => $plugin->name,
            };
        } else {    # warn and supply default field
            warn $plugin->errstr;
            $subfield_data{marc_value} = {
                type      => 'text',
                id        => $subfield_data{id},
                name      => $subfield_data{id},
                value     => $value,
                maxlength => $max_length,
            };
        }
    }

    # it's an hidden field
    elsif ( $tag eq '' ) {
        $subfield_data{marc_value} = {
            type      => 'hidden',
            id        => $subfield_data{id},
            name      => $subfield_data{id},
            value     => $value,
            maxlength => $max_length,
        };
    } elsif ( $tagslib->{$tag}->{$subfield}->{'hidden'} ) {
        $subfield_data{marc_value} = {
            type      => 'text',
            id        => $subfield_data{id},
            name      => $subfield_data{id},
            value     => $value,
            maxlength => $max_length,
        };

        # it's a standard field
    } else {
        if (
            length($value) > 100
            or ( C4::Context->preference("marcflavour") eq "UNIMARC" && $tag >= 300
                and $tag < 400 && $subfield eq 'a' )
            or (    $tag >= 600
                and $tag < 700 && C4::Context->preference("marcflavour") eq "MARC21" )
            )
        {
            $subfield_data{marc_value} = {
                type      => 'textarea',
                id        => $subfield_data{id},
                name      => $subfield_data{id},
                value     => $value,
                maxlength => $max_length,
            };

        } else {
            $subfield_data{marc_value} = {
                type      => 'text',
                id        => $subfield_data{id},
                name      => $subfield_data{id},
                value     => $value,
                maxlength => $max_length,
            };

        }
    }
    if ( $cgi->param('tagreport') && $subfield_data{tag} == $cgi->param('tagreport') ) {
        $subfield_data{marc_value}{value} =
            $cgi->param( 'tag' . $cgi->param('tagbiblio') . 'subfield' . $subfield_data{subfield} );
    }
    $subfield_data{'index_subfield'} = $index_subfield;
    return \%subfield_data;
}

=item format_indicator

Translate indicator value for output form - specifically, map
indicator = ' ' to ''.  This is for the convenience of a cataloger
using a mouse to select an indicator input.

=cut

sub format_indicator {
    my $ind_value = shift;
    return '' if not defined $ind_value;
    return '' if $ind_value eq ' ';
    return $ind_value;
}

=item CreateKey

Create a random value to set it into the input name

=cut

sub CreateKey {
    return int( rand(1000000) );
}

=item GetMandatoryFieldZ3950

    This function returns a hashref which contains all mandatory field
    to search with z3950 server.

=cut

sub GetMandatoryFieldZ3950 {
    my $authtypecode = shift;
    if ( C4::Context->preference('marcflavour') eq 'MARC21' ) {
        return {
            '100a' => 'authorpersonal',
            '110a' => 'authorcorp',
            '111a' => 'authormeetingcon',
            '130a' => 'uniformtitle',
            '150a' => 'subject',
        };
    } else {
        return {
            '200a' => 'authorpersonal',
            '210a' => 'authorcorp',       #210 in UNIMARC is used for both corporation and meeting
            '230a' => 'uniformtitle',
        };
    }
}

sub build_tabs {
    my ( $template, $record, $dbh, $input ) = @_;

    # fill arrays
    my @loop_data = ();
    my $tag;

    my $authorised_values_sth = $dbh->prepare(
        "SELECT authorised_value,lib
        FROM authorised_values
        WHERE category=? ORDER BY lib"
    );

    # in this array, we will push all the 10 tabs
    # to avoid having 10 tabs in the template : they will all be in the same BIG_LOOP
    my @BIG_LOOP;
    my %seen;
    my @tab_data;    # all tags to display

    foreach my $used ( keys %$tagslib ) {
        push @tab_data, $used if not $seen{$used};
        $seen{$used}++;
    }

    my $max_num_tab = 9;

    # loop through each tab 0 through 9
    for ( my $tabloop = 0 ; $tabloop <= $max_num_tab ; $tabloop++ ) {
        my @loop_data = ();    #innerloop in the template.
        my $i         = 0;
        foreach my $tag ( sort @tab_data ) {
            $i++;
            next if !$tag;
            my ( $indicator1, $indicator2 );
            my $index_tag = CreateKey;

            # if MARC::Record is not empty =>use it as master loop, then add missing subfields that should be in the tab.
            # if MARC::Record is empty => use tab as master loop.
            if ( $record && ( $record->field($tag) || $tag eq '000' ) ) {
                my @fields;
                if ( $tag ne '000' ) {
                    @fields = $record->field($tag);
                } else {
                    push @fields, $record->leader();    # if tag == 000
                }

                # loop through each field
                foreach my $field (@fields) {

                    my @subfields_data;
                    if ( $tag < 10 ) {
                        my ( $value, $subfield );
                        if ( $tag ne '000' ) {
                            $value    = $field->data();
                            $subfield = "@";
                        } else {
                            $value    = $field;
                            $subfield = '@';
                        }
                        next if ( $tagslib->{$tag}->{$subfield}->{tab} ne $tabloop );
                        next if $tagslib->{$tag}->{$subfield}->{hidden} && $subfield ne '9';
                        push(
                            @subfields_data,
                            &create_input(
                                $tag, $subfield, $value, $index_tag, $record,
                                $authorised_values_sth, $input
                            )
                        );
                    } else {
                        my @subfields = $field->subfields();
                        foreach my $subfieldcount ( 0 .. $#subfields ) {
                            my $subfield = $subfields[$subfieldcount][0];
                            my $value    = $subfields[$subfieldcount][1];
                            next if ( length $subfield != 1 );
                            next if ( $tagslib->{$tag}->{$subfield}->{tab} ne $tabloop );
                            next if $tagslib->{$tag}->{$subfield}->{hidden} && $subfield ne '9';
                            push(
                                @subfields_data,
                                &create_input(
                                    $tag,    $subfield, $value, $index_tag,
                                    $record, $authorised_values_sth, $input
                                )
                            );
                        }
                    }

                    # now, loop again to add parameter subfield that are not in the MARC::Record
                    foreach my $subfield ( sort( keys %{ $tagslib->{$tag} } ) ) {
                        next if ( length $subfield != 1 );
                        next if ( $tagslib->{$tag}->{$subfield}->{tab} ne $tabloop );
                        next if ( $tag < 10 );
                        next if $tagslib->{$tag}->{$subfield}->{hidden} && $subfield ne '9';
                        next if ( defined( $field->subfield($subfield) ) );
                        push(
                            @subfields_data,
                            &create_input(
                                $tag, $subfield, '', $index_tag, $record,
                                $authorised_values_sth, $input
                            )
                        );
                    }
                    if ( $#subfields_data >= 0 ) {

                        # build the tag entry.
                        # note that the random() field is mandatory. Otherwise, on repeated fields, you'll
                        # have twice the same "name" value, and cgi->param() will return only one, making
                        # all subfields to be merged in a single field.
                        my %tag_data = (
                            tag           => $tag,
                            index         => $index_tag,
                            tag_lib       => $tagslib->{$tag}->{lib},
                            repeatable    => $tagslib->{$tag}->{repeatable},
                            mandatory     => $tagslib->{$tag}->{mandatory},
                            subfield_loop => \@subfields_data,
                            fixedfield    => ( $tag < 10 ) ? (1) : (0),
                            random        => CreateKey,
                        );
                        if ( $tag >= 10 ) {    # no indicator for FIXME CODESPELL (theses ==> these, thesis) tag
                            $tag_data{indicator1} = format_indicator( $field->indicator(1) ),
                                $tag_data{indicator2} = format_indicator( $field->indicator(2) ),;
                        }
                        push( @loop_data, \%tag_data );
                    }
                }    # foreach $field end

                # if breeding is empty
            } else {
                my @subfields_data;
                foreach my $subfield (
                    sort { $a->{display_order} <=> $b->{display_order} || $a->{subfield} cmp $b->{subfield} }
                    grep { ref($_) && %$_ } # Not a subfield (values for "important", "lib", "mandatory", etc.) or empty
                    values %{ $tagslib->{$tag} }
                    )
                {
                    next if $subfield->{hidden} && $subfield->{subfield} ne '9';
                    next if ( $subfield->{tab} ne $tabloop );
                    push(
                        @subfields_data,
                        &create_input(
                            $tag, $subfield->{subfield}, '', $index_tag, $record,
                            $authorised_values_sth, $input
                        )
                    );
                }
                if ( $#subfields_data >= 0 ) {
                    my %tag_data = (
                        tag              => $tag,
                        index            => $index_tag,
                        tag_lib          => $tagslib->{$tag}->{lib},
                        repeatable       => $tagslib->{$tag}->{repeatable},
                        mandatory        => $tagslib->{$tag}->{mandatory},
                        indicator1       => $indicator1,
                        indicator2       => $indicator2,
                        subfield_loop    => \@subfields_data,
                        tagfirstsubfield => $subfields_data[0],
                        fixedfield       => ( $tag < 10 ) ? (1) : (0)
                    );

                    push @loop_data, \%tag_data;
                }
            }
        }
        if ( $#loop_data >= 0 ) {
            push @BIG_LOOP, {
                number    => $tabloop,
                innerloop => \@loop_data,
            };
        }
    }
    $template->param( BIG_LOOP => \@BIG_LOOP );
}

sub build_hidden_data {

    # build hidden data =>
    # we store everything, even if we show only requested subfields.

    my @loop_data = ();
    my $i         = 0;
    foreach my $tag ( keys %{$tagslib} ) {
        my $previous_tag = '';

        # loop through each subfield
        foreach my $subfield ( keys %{ $tagslib->{$tag} } ) {
            next if ( $subfield eq 'lib' );
            next if ( $subfield eq 'tab' );
            next if ( $subfield eq 'mandatory' );
            next if ( $subfield eq 'repeatable' );
            next if ( $tagslib->{$tag}->{$subfield}->{'tab'} ne "-1" );
            my %subfield_data;
            $subfield_data{marc_lib}        = $tagslib->{$tag}->{$subfield}->{lib};
            $subfield_data{marc_mandatory}  = $tagslib->{$tag}->{$subfield}->{mandatory};
            $subfield_data{marc_repeatable} = $tagslib->{$tag}->{$subfield}->{repeatable};
            $subfield_data{marc_value}      = {
                type => 'hidden_simple',
                name => 'field_value[]',
            };
            push( @loop_data, \%subfield_data );
            $i++;
        }
    }
}

=back

=cut

# ========================
#          MAIN
#=========================
my $input  = CGI->new;
my $z3950  = $input->param('z3950');
my $error  = $input->param('error');
my $authid = $input->param('authid') =~ s/\D//gr
    ; # if authid exists, it's a modif, not a new authority. We remove from authid all non-digit characters just in case the CGI parameter contains weird characters like spaces
my $op           = $input->param('op');
my $myindex      = $input->param('index');
my $linkid       = $input->param('linkid');
my $authtypecode = $input->param('authtypecode');
my $breedingid   = $input->param('breedingid');

my $changed_authtype;
if ( $op eq 'cud-change-framework' ) {
    $op               = $input->param('original_op');
    $changed_authtype = 1;
}

my $dbh     = C4::Context->dbh;
my $authobj = Koha::Authorities->find($authid);
if ( $authid && !$authobj ) {
    print $input->redirect("/cgi-bin/koha/errors/404.pl");    # escape early
    exit;
}
if ( !$authtypecode ) {
    $authtypecode = $authid ? $authobj->authtypecode : '';
}

my $count = $authobj ? $authobj->get_usage_count : 0;

my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name => "authorities/authorities.tt",
        query         => $input,
        type          => "intranet",
        flagsrequired => { editauthorities => 1 },
    }
);
$template->param( index => $myindex, authtypecode => $authtypecode, breedingid => $breedingid, count => $count );

$tagslib         = GetTagsLabels( 1, $authtypecode );
$mandatory_z3950 = GetMandatoryFieldZ3950($authtypecode);

my $record;
if ($breedingid) {
    my $import_record = Koha::Import::Records->find($breedingid);
    if ($import_record) {
        $record = $import_record->get_marc_record();
    }
} elsif ($authid) {
    $record = GetAuthority($authid);
}

my ( $oldauthnumtagfield,  $oldauthnumtagsubfield );
my ( $oldauthtypetagfield, $oldauthtypetagsubfield );
$is_a_modif = 0;
if ($authid) {
    $is_a_modif = 1;
    ( $oldauthnumtagfield, $oldauthnumtagsubfield ) = GetAuthMARCFromKohaField( "auth_header.authid", $authtypecode );
    ( $oldauthtypetagfield, $oldauthtypetagsubfield ) =
        GetAuthMARCFromKohaField( "auth_header.authtypecode", $authtypecode );
}
$op ||= q{};

#------------------------------------------------------------------------------------------------------------------------------
if ( $op eq "cud-add" ) {

    #------------------------------------------------------------------------------------------------------------------------------
    # rebuild
    my @tags      = $input->multi_param('tag');
    my @subfields = $input->multi_param('subfield');
    my @values    = $input->multi_param('field_value');

    # build indicator hash.
    my @ind_tag   = $input->multi_param('ind_tag');
    my @indicator = $input->multi_param('indicator');
    my $record    = TransformHtmlToMarc( $input, 0 );

    my ( $duplicateauthid, $duplicateauthvalue );
    ( $duplicateauthid, $duplicateauthvalue ) = FindDuplicateAuthority( $record, $authtypecode ) unless $is_a_modif;

    my $confirm_not_duplicate = $input->param('confirm_not_duplicate');

    # it is not a duplicate (determined either by Koha itself or by user checking it's not a duplicate)
    if ( !$duplicateauthid or $confirm_not_duplicate ) {
        if ($is_a_modif) {
            ModAuthority( $authid, $record, $authtypecode );
        } else {
            ($authid) = AddAuthority( $record, $authid, $authtypecode );
        }
        if ($myindex) {
            print $input->redirect("blinddetail-biblio-search.pl?authid=$authid&index=$myindex");
        } else {
            print $input->redirect("detail.pl?authid=$authid");
        }
        exit;
    } else {

        # it may be a duplicate, warn the user and do nothing
        build_tabs( $template, $record, $dbh, $input );
        build_hidden_data;
        $template->param(
            authid             => $authid,
            duplicateauthid    => $duplicateauthid,
            duplicateauthvalue => $duplicateauthvalue->{'authorized'}->[0]->{'heading'},
        );
    }
} else {
    if ( $op eq "duplicate" ) {
        $authid = "";
        if ( C4::Context->preference('marcflavour') eq 'MARC21' && $record && $record->field('008') ) {
            my $s008 = $record->field('008')->data;
            my $date = POSIX::strftime( "%y%m%d", localtime );
            substr( $s008, 0, 6, $date );
            $record->field('008')->update($s008);
        } elsif ( C4::Context->preference('marcflavour') eq 'UNIMARC' && $record && $record->subfield( '100', 'a' ) ) {
            my $s100a = $record->subfield( '100', 'a' );
            my $date  = POSIX::strftime( "%Y%m%d", localtime );
            substr( $s100a, 0, 8, $date );
            $record->field('100')->update( a => $s100a );
        }
    }

    if ($changed_authtype) {
        $record = TransformHtmlToMarc( $input, 0 );
    }

    build_tabs( $template, $record, $dbh, $input );
    build_hidden_data;
    $template->param(
        oldauthtypetagfield    => $oldauthtypetagfield,
        oldauthtypetagsubfield => $oldauthtypetagsubfield,
        oldauthnumtagfield     => $oldauthnumtagfield,
        oldauthnumtagsubfield  => $oldauthnumtagsubfield,
        authid                 => $authid,
        authtypecode           => $authtypecode,
    );
}

my $authority_types = Koha::Authority::Types->search( {}, { order_by => ['authtypetext'] } );

my $type = $authority_types->find($authtypecode);
$template->param(
    authority_types => $authority_types,
    authtypecode    => $authtypecode,
    authid          => $authid,
    linkid          => $linkid,
    authtypetext    => $type ? $type->authtypetext : "",
    hide_marc       => C4::Context->preference('hide_marc'),
);
output_html_with_http_headers $input, $cookie, $template->output;