#!/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 strict;
#use warnings; FIXME - Bug 2505
use C4::Output;
use C4::Auth;
use CGI qw ( -utf8 );
use C4::Context;
use C4::Biblio;


my $input = new CGI;

my ($template, $borrowernumber, $cookie)
    = get_template_and_user({template_name => "admin/checkmarc.tt",
			     query => $input,
			     type => "intranet",
			     authnotrequired => 0,
                 flagsrequired => {parameters => 'parameters_remaining_permissions'},
			     debug => 1,
			     });

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;