#!/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 <https://www.gnu.org/licenses>.

use Modern::Perl;
use C4::Output qw( output_html_with_http_headers );
use C4::Auth   qw( get_template_and_user );
use CGI        qw ( -utf8 );
use C4::Context;

my $input = CGI->new;

my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
    {
        template_name => "admin/checkmarc.tt",
        query         => $input,
        type          => "intranet",
        flagsrequired => { parameters => 'manage_marc_frameworks' },
    }
);

my $dbh   = C4::Context->dbh;
my $total = 0;

# checks itemnum field
my $sth = $dbh->prepare("select tab from marc_subfield_structure where kohafield=\"items.itemnumber\"");
$sth->execute;
while ( my ($res) = $sth->fetchrow ) {
    if ( $res == -1 ) {
        $template->param( itemnum => 0 );
    } else {
        $template->param( itemnum => 1 );
        $total++;
        last;
    }
}

# checks biblio.biblionumber and biblioitem.biblioitemnumber (same tag and tab=-1)
$sth = $dbh->prepare(
    "select tagfield,tab,frameworkcode from marc_subfield_structure where kohafield=\"biblio.biblionumber\"");
$sth->execute;
my $first     = 1;
my $bibliotag = '';
while ( my ( $res, $tab, $frameworkcode ) = $sth->fetchrow ) {
    if ($first) {
        $bibliotag = $res;
        $first     = 0;
    } else {
        if ( $bibliotag != $res ) {
            $template->param( biblionumber => 1 );
            $total++;
            last;
        }
    }
    my $sth2 = $dbh->prepare(
        "SELECT tagfield,tab 
                              FROM marc_subfield_structure 
                              WHERE kohafield=\"biblioitems.biblioitemnumber\"
                              AND frameworkcode = ? "
    );
    $sth2->execute($frameworkcode);
    my ( $res2, $tab2 ) = $sth2->fetchrow;
    if ( $res && $res2 && $tab == -1 && $tab2 == -1 ) {
        $template->param( biblionumber => 0 );
    } else {
        $template->param( biblionumber => 1 );
        $total++;
        last;
    }
}

# checks all item fields are in the same tag and in tab 10

$sth = $dbh->prepare(
    "select tagfield,tab,kohafield from marc_subfield_structure where kohafield like \"items.%\" and tab >=0");
$sth->execute;
my $field;
my $res;
my $res2;
my $tab;
( $res, $res2, $field ) = $sth->fetchrow;
my $tagfield = $res;
$tab = $res2;
my $subtotal = 0;

#warn "TAGF : $tagfield";
while ( ( $res, $res2, $field ) = $sth->fetchrow ) {

    # (ignore itemnumber, that must be in -1 tab)
    if ( ( $res ne $tagfield ) or ( $res2 ne $tab ) ) {
        $subtotal++;
    }
}
$sth = $dbh->prepare("select kohafield from marc_subfield_structure where tagfield=?");
$sth->execute($tagfield);
while ( ($res2) = $sth->fetchrow ) {
    if ( !$res2 || $res2 =~ /^items/ ) {
    } else {
        $subtotal++;
    }
}
if ( $subtotal == 0 ) {
    $template->param( itemfields => 0 );
} else {
    $template->param( itemfields => 1 );
    $total++;
}

$sth = $dbh->prepare("select distinct tagfield from marc_subfield_structure where tab = 10");
$sth->execute;
my $totaltags = 0;
my $list      = "";
while ( ($res2) = $sth->fetchrow ) {
    $totaltags++;
    $list .= $res2 . ",";
}
if ( $totaltags > 1 ) {
    $template->param( itemtags => $list );
    $total++;
} else {
    $template->param( itemtags => 0 );
}

# checks biblioitems.itemtype must be mapped and use authorised_value=itemtype
$sth = $dbh->prepare(
    "select tagfield,tab,authorised_value from marc_subfield_structure where kohafield = \"biblioitems.itemtype\"");
$sth->execute;
while ( ( $res, $res2, $field ) = $sth->fetchrow ) {
    if ( $res && $res2 >= 0 && $field eq "itemtypes" ) {
        $template->param( itemtype => 0 );
    } else {
        $template->param( itemtype => 1 );
        $total++;
        last;
    }
}

# checks items.homebranch must be mapped and use authorised_value=branches
$sth = $dbh->prepare(
    "select tagfield,tab,authorised_value from marc_subfield_structure where kohafield = \"items.homebranch\"");
$sth->execute;
while ( ( $res, $res2, $field ) = $sth->fetchrow ) {
    if ( $res && $res2 eq 10 && $field eq "branches" ) {
        $template->param( branch => 0 );
    } else {
        $template->param( branch => 1 );
        $total++;
        last;
    }
}

# checks items.homebranch must be mapped and use authorised_value=branches
$sth = $dbh->prepare(
    "select tagfield,tab,authorised_value from marc_subfield_structure where kohafield = \"items.holdingbranch\"");
$sth->execute;
while ( ( $res, $res2, $field ) = $sth->fetchrow ) {
    if ( $res && $res2 eq 10 && $field eq "branches" ) {
        $template->param( holdingbranch => 0 );
    } else {
        $template->param( holdingbranch => 1 );
        $total++;
        last;    #MR
    }
}

# checks that itemtypes & branches tables are not empty
$sth = $dbh->prepare("select count(*) from itemtypes");
$sth->execute;
($res) = $sth->fetchrow;
if ($res) {
    $template->param( itemtypes_empty => 0 );
} else {
    $template->param( itemtypes_empty => 1 );
    $total++;
}

$sth = $dbh->prepare("select count(*) from branches");
$sth->execute;
($res) = $sth->fetchrow;
if ($res) {
    $template->param( branches_empty => 0 );
} else {
    $template->param( branches_empty => 1 );
    $total++;
}

$sth = $dbh->prepare("select count(*) from marc_subfield_structure where frameworkcode is NULL");
$sth->execute;
($res) = $sth->fetchrow;
if ($res) {
    $template->param( frameworknull => 1 );
    $total++;
}
$sth = $dbh->prepare("select count(*) from marc_tag_structure where frameworkcode is NULL");
$sth->execute;
($res) = $sth->fetchrow;
if ($res) {
    $template->param( frameworknull => 1 );
    $total++;
}

# verify that all of a field's subfields (except the ones explicitly ignored)
# are in the same tab
$sth = $dbh->prepare(
    "SELECT tagfield, frameworkcode, frameworktext, GROUP_CONCAT(DISTINCT tab) AS tabs
                      FROM marc_subfield_structure
                      LEFT JOIN biblio_framework USING (frameworkcode)
                      WHERE tab != -1
                      GROUP BY tagfield, frameworkcode, frameworktext
                      HAVING COUNT(DISTINCT tab) > 1"
);
$sth->execute;
my $inconsistent_tabs = $sth->fetchall_arrayref( {} );
if ( scalar(@$inconsistent_tabs) > 0 ) {
    $total++;
    $template->param( inconsistent_tabs => 1 );
    $template->param( tab_info          => $inconsistent_tabs );
}

# verify that authtypecodes used in the framework
# are defined in auth_types
$sth = $dbh->prepare(
    "SELECT frameworkcode, frameworktext, tagfield, tagsubfield, authtypecode
                      FROM marc_subfield_structure
                      LEFT JOIN biblio_framework USING (frameworkcode)
                      WHERE authtypecode IS NOT NULL
                      AND authtypecode <> ''
                      AND tab > '-1'
                      AND authtypecode NOT IN (SELECT authtypecode FROM auth_types)
                      ORDER BY frameworkcode, tagfield, tagsubfield"
);
$sth->execute;
my $invalid_authtypecodes = $sth->fetchall_arrayref( {} );
if ( scalar(@$invalid_authtypecodes) > 0 ) {
    $total++;
    $template->param( invalid_authtypecodes => 1 );
    $template->param( authtypecode_info     => $invalid_authtypecodes );
}

# checks items.permanent_location is not mapped
$sth = $dbh->prepare(
    "SELECT frameworkcode, frameworktext, tagfield, tagsubfield
                      FROM marc_subfield_structure
                      LEFT JOIN biblio_framework USING (frameworkcode)
                      WHERE kohafield='permanent_location' OR
                            kohafield='items.permanent_location'"
);
$sth->execute;
my $permanent_location_mapped = $sth->fetchall_arrayref( {} );
if ( scalar(@$permanent_location_mapped) > 0 ) {
    $total++;
    $template->param( permanent_location_mapped => 1 );
    $template->param( mapped_permanent_location => $permanent_location_mapped );
}

$template->param(
    total => $total,
);

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