#!/usr/bin/perl

# $Id$

# 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 2 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., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA

use strict;
use CGI;
use C4::Auth;
use C4::Output;
use C4::Interface::CGI::Output;
use C4::AuthoritiesMarc;
use C4::Context;
use C4::Koha; # XXX subfield_is_koha_internal_p
use HTML::Template;
use MARC::File::USMARC;

use vars qw( $tagslib);
use vars qw( $authorised_values_sth);
use vars qw( $is_a_modif );

=item find_value

    ($indicators, $value) = find_value($tag, $subfield, $record,$encoding);

Find the given $subfield in the given $tag in the given
MARC::Record $record.  If the subfield is found, returns
the (indicators, value) pair; otherwise, (undef, undef) is
returned.

=cut

sub find_value {
	my ($tagfield,$insubfield,$record,$encoding) = @_;
	my @result;
	my $indicator;
	if ($tagfield <10) {
		if ($record->field($tagfield)) {
			push @result, $record->field($tagfield)->data();
		} else {
			push @result,"";
		}
	} else {
		foreach my $field ($record->field($tagfield)) {
			my @subfields = $field->subfields();
			foreach my $subfield (@subfields) {
				if (@$subfield[0] eq $insubfield) {
					push @result,char_decode(@$subfield[1],$encoding);
					$indicator = $field->indicator(1).$field->indicator(2);
				}
			}
		}
	}
	return($indicator,@result);
}


=item build_authorized_values_list

=cut

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

	my @authorised_values;
	my %authorised_lib;

	# builds list, depending on authorised value...

	#---- branch
	if ($tagslib->{$tag}->{$subfield}->{'authorised_value'} eq "branches" ) {
	my $sth=$dbh->prepare("select branchcode,branchname from branches order by branchname");
	$sth->execute;
	push @authorised_values, ""
		unless ($tagslib->{$tag}->{$subfield}->{mandatory});

	while (my ($branchcode,$branchname) = $sth->fetchrow_array) {
		push @authorised_values, $branchcode;
		$authorised_lib{$branchcode}=$branchname;
	}

	#----- itemtypes
	} elsif ($tagslib->{$tag}->{$subfield}->{authorised_value} eq "itemtypes") {
		my $sth=$dbh->prepare("select itemtype,description from itemtypes order by description");
		$sth->execute;
		push @authorised_values, "" unless ($tagslib->{$tag}->{$subfield}->{mandatory});
	
		while (my ($itemtype,$description) = $sth->fetchrow_array) {
			push @authorised_values, $itemtype;
			$authorised_lib{$itemtype}=$description;
		}
# 		$value=$itemtype unless ($value);

	#---- "true" authorised value
	} else {
		$authorised_values_sth->execute($tagslib->{$tag}->{$subfield}->{authorised_value});

		push @authorised_values, "" unless ($tagslib->{$tag}->{$subfield}->{mandatory});
	
		while (my ($value,$lib) = $authorised_values_sth->fetchrow_array) {
			push @authorised_values, $value;
			$authorised_lib{$value}=$lib;
		}
    }
    return CGI::scrolling_list( -name     => 'field_value',
				-values   => \@authorised_values,
				-default  => $value,
				-labels   => \%authorised_lib,
				-size     => 1,
				-multiple => 0 );
}

=item create_input
 builds the <input ...> entry for a subfield.
=cut
sub create_input () {
	my ($tag,$subfield,$value,$i,$rec,$authorised_values_sth) = @_;
	$value =~ s/"/&quot;/g;
	my $dbh = C4::Context->dbh;
	my %subfield_data;
	$subfield_data{tag}=$tag;
	$subfield_data{subfield}=$subfield;
	$subfield_data{marc_lib}="<span id=\"error$i\">".$tagslib->{$tag}->{$subfield}->{lib}."</span>";
	$subfield_data{tag_mandatory}=$tagslib->{$tag}->{mandatory};
	$subfield_data{mandatory}=$tagslib->{$tag}->{$subfield}->{mandatory};
	$subfield_data{repeatable}=$tagslib->{$tag}->{$subfield}->{repeatable};
# 	$subfield_data{kohafield}=$tagslib->{$tag}->{$subfield}->{kohafield};
	if ($tagslib->{$tag}->{$subfield}->{authorised_value}) {
		$subfield_data{marc_value}= build_authorized_values_list($tag, $subfield, $value, $dbh,$authorised_values_sth);
	} elsif ($tagslib->{$tag}->{$subfield}->{thesaurus_category}) {
		$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\"  size=47 maxlength=255 DISABLE READONLY> <a href=\"javascript:Dopop('../thesaurus_popup.pl?category=$tagslib->{$tag}->{$subfield}->{thesaurus_category}&index=$i',$i)\">...</a>";
	} elsif ($tagslib->{$tag}->{$subfield}->{'value_builder'}) {
		my $plugin="../value_builder/".$tagslib->{$tag}->{$subfield}->{'value_builder'};
		require $plugin;
		my $extended_param = plugin_parameters($dbh,$rec,$tagslib,$i,0);
		my ($function_name,$javascript) = plugin_javascript($dbh,$rec,$tagslib,$i,0);
		$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\"  value=\"$value\" DISABLE READONLY size=47 maxlength=255 OnFocus=\"javascript:Focus$function_name($i)\" OnBlur=\"javascript:Blur$function_name($i)\"> <a href=\"javascript:Clic$function_name($i)\">...</a> $javascript";
	} elsif  ($tag eq '') {
		$subfield_data{marc_value}="<input type=\"hidden\" name=\"field_value\" size=50 maxlength=255>"; #"
	} else {
		$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\" value=\"$value\" size=50 maxlength=255>"; #"
	}
	return \%subfield_data;
}

sub build_tabs ($$$$) {
    my($template, $record, $dbh,$encoding) = @_;
    # fill arrays
    my @loop_data =();
    my $tag;
    my $i=0;
	my $authorised_values_sth = $dbh->prepare("select authorised_value,lib
		from authorised_values
		where category=? order by lib");

	my @loop_data = ();
	foreach my $tag (sort(keys (%{$tagslib}))) {
		my $indicator;
# 		warn "TAG : $tag => ".$tagslib->{$tag}->{lib}."//";
# if MARC::Record is not empty => use it as master loop, then add missing subfields that should be in the tab.
# if MARC::Record is empty => use tab as master loop.
		if ($record ne -1 && $record->field($tag)) {
			my @fields = $record->field($tag);
			foreach my $field (@fields)  {
				my @subfields_data;
				if ($tag<10) {
					my $value=$field->data();
					my $subfield="@";
					next if ($tagslib->{$tag}->{$subfield}->{tab} eq -1);
					push(@subfields_data, &create_input($tag,$subfield,char_decode($value,$encoding),$i,$record,$authorised_values_sth));
					$i++;
				} else {
					my @subfields=$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} eq -1);
						push(@subfields_data, &create_input($tag,$subfield,char_decode($value,$encoding),$i,$record,$authorised_values_sth));
						$i++;
					}
				}
# 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} eq -1);
					next if ($tag<10);
					next if (defined($record->field($tag)->subfield($subfield)));
					push(@subfields_data, &create_input($tag,$subfield,'',$i,$record,$authorised_values_sth));
					$i++;
				}
				if ($#subfields_data >= 0) {
					my %tag_data;
					$tag_data{tag} = $tag;
					$tag_data{tag_lib} = $tagslib->{$tag}->{lib};
					$tag_data{repeatable} = $tagslib->{$tag}->{repeatable};
					$tag_data{indicator} = $record->field($tag)->indicator(1). $record->field($tag)->indicator(2) if ($tag>=10);
					$tag_data{subfield_loop} = \@subfields_data;
					push (@loop_data, \%tag_data);
				}
# If there is more than 1 field, add an empty hidden field as separator.
				if ($#fields >=1) {
					my @subfields_data;
					my %tag_data;
					push(@subfields_data, &create_input('','','',$i,$record,$authorised_values_sth));
					$tag_data{tag} = '';
					$tag_data{tag_lib} = '';
					$tag_data{indicator} = '';
					$tag_data{subfield_loop} = \@subfields_data;
					push (@loop_data, \%tag_data);
					$i++;
				}
			}
# if breeding is empty
		} else {
			my @subfields_data;
			foreach my $subfield (sort(keys %{$tagslib->{$tag}})) {
				next if (length $subfield !=1);
				next if ($tagslib->{$tag}->{$subfield}->{tab} eq -1);
				push(@subfields_data, &create_input($tag,$subfield,'',$i,$record,$authorised_values_sth));
				$i++;
			}
			if ($#subfields_data >= 0) {
				my %tag_data;
				$tag_data{tag} = $tag;
				$tag_data{tag_lib} = $tagslib->{$tag}->{lib};
				$tag_data{repeatable} = $tagslib->{$tag}->{repeatable};
				$tag_data{indicator} = $indicator;
				$tag_data{subfield_loop} = \@subfields_data;
				push (@loop_data, \%tag_data);
			}
		}
	}
	$template->param("0XX" =>\@loop_data);
}


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}="<input type=\"hidden\" name=\"field_value[]\">";
	    push(@loop_data, \%subfield_data);
	    $i++
	}
    }
}


# ======================== 
#          MAIN 
#=========================
my $input = new CGI;
my $error = $input->param('error');
my $authid=$input->param('authid'); # if authid exists, it's a modif, not a new authority.
my $z3950 = $input->param('z3950');
my $op = $input->param('op');
# warn "OP : $op";
my $authtypecode = $input->param('authtypecode');
my $dbh = C4::Context->dbh;
$authtypecode = &AUTHfind_authtypecode($dbh,$authid) if $authid;
# warn "authtypecode : $authtypecode && authid = $authid";
my ($template, $loggedinuser, $cookie)
    = get_template_and_user({template_name => "authorities/authorities.tmpl",
			     query => $input,
			     type => "intranet",
			     authnotrequired => 0,
			     flagsrequired => {editcatalogue => 1},
			     debug => 1,
			     });

$tagslib = AUTHgettagslib($dbh,1,$authtypecode);
my $record=-1;
my $encoding="";
$record = AUTHgetauthority($dbh,$authid) if ($authid);

$is_a_modif=0;
# my ($oldbiblionumtagfield,$oldbiblionumtagsubfield);
# my ($oldbiblioitemnumtagfield,$oldbiblioitemnumtagsubfield,$bibitem,$oldbiblioitemnumber);
if ($authid) {
	$is_a_modif=1;
	# if it's a modif, retrieve old biblio and bibitem numbers for the future modification of old-DB.
# 	($oldbiblionumtagfield,$oldbiblionumtagsubfield) = &MARCfind_marc_from_kohafield($dbh,"biblio.biblionumber");
# 	($oldbiblioitemnumtagfield,$oldbiblioitemnumtagsubfield) = &MARCfind_marc_from_kohafield($dbh,"biblioitems.biblioitemnumber");
# 	# search biblioitems value
# 	my $sth=$dbh->prepare("select biblioitemnumber from biblioitems where biblionumber=?");
# 	$sth->execute($oldbiblionumber);
# 	($oldbiblioitemnumber) = $sth->fetchrow;
}
#------------------------------------------------------------------------------------------------------------------------------
if ($op eq "add") {
#------------------------------------------------------------------------------------------------------------------------------
	# rebuild
	my @tags = $input->param('tag');
	my @subfields = $input->param('subfield');
	my @values = $input->param('field_value');
	# build indicator hash.
	my @ind_tag = $input->param('ind_tag');
	my @indicator = $input->param('indicator');
	my %indicators;
	for (my $i=0;$i<=$#ind_tag;$i++) {
		$indicators{$ind_tag[$i]} = $indicator[$i];
	}
	my $record = AUTHhtml2marc($dbh,\@tags,\@subfields,\@values,%indicators);
# MARC::Record built => now, record in DB
	# check for a duplicate
	my ($duplicateauthid,$duplicateauthvalue) = FindDuplicate($record,$authtypecode) if ($op eq "add") && (!$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) {
			AUTHmodauthority($dbh,$authid,$record,$authtypecode);
		} else {
			($authid) = AUTHaddauthority($dbh,$record,$authid,$authtypecode);
		}
	# now, redirect to detail page
		print $input->redirect("detail.pl?authid=$authid");
		exit;
	} else {
	# it may be a duplicate, warn the user and do nothing
		build_tabs ($template, $record, $dbh,$encoding);
		build_hidden_data;
		$template->param(
			duplicateauthid				=> $duplicateauthid,
			duplicateauthvalue				=> $duplicateauthvalue,
			 );
	}
#------------------------------------------------------------------------------------------------------------------------------
} elsif ($op eq "addfield") {
#------------------------------------------------------------------------------------------------------------------------------
	my $addedfield = $input->param('addfield_field');
	my @tags = $input->param('tag');
	my @subfields = $input->param('subfield');
	my @values = $input->param('field_value');
	# build indicator hash.
	my @ind_tag = $input->param('ind_tag');
	my @indicator = $input->param('indicator');
	my %indicators;
	for (my $i=0;$i<=$#ind_tag;$i++) {
		$indicators{$ind_tag[$i]} = $indicator[$i];
	}
	my $record = AUTHhtml2marc($dbh,\@tags,\@subfields,\@values,%indicators);
	my $field = MARC::Field->new("$addedfield",'','','a'=> "");
	$record->append_fields($field);

	build_tabs ($template, $record, $dbh,$encoding);
	build_hidden_data;
	$template->param(
		authid                       => $authid,);
# 		oldbiblionumtagfield        => $oldbiblionumtagfield,
# 		oldbiblionumtagsubfield     => $oldbiblionumtagsubfield,
# 		oldbiblioitemnumtagfield    => $oldbiblioitemnumtagfield,
# 		oldbiblioitemnumtagsubfield => $oldbiblioitemnumtagsubfield,
# 		oldbiblioitemnumber         => $oldbiblioitemnumber );
} elsif ($op eq "delete") {
#------------------------------------------------------------------------------------------------------------------------------
	&AUTHdelauthority($dbh,$authid);
} else {
	build_tabs ($template, $record, $dbh,$encoding);
	build_hidden_data;
}

unless ($op) {
# 	warn "BUILDING";
	build_tabs ($template, $record, $dbh,$encoding);
	build_hidden_data;
}
$template->param(
	authid                       => $authid,
# 	oldbiblionumtagfield        => $oldbiblionumtagfield,
# 	oldbiblionumtagsubfield     => $oldbiblionumtagsubfield,
# 	oldbiblioitemnumtagfield    => $oldbiblioitemnumtagfield,
# # 	oldbiblioitemnumtagsubfield => $oldbiblioitemnumtagsubfield,
# 	oldbiblioitemnumber         => $oldbiblioitemnumber,
	authtypecode => $authtypecode,
	);

my $authtypes = getauthtypes;
my @authtypesloop;
foreach my $thisauthtype (keys %$authtypes) {
	my $selected = 1 if $thisauthtype eq $authtypecode;
	my %row =(value => $thisauthtype,
				selected => $selected,
				authtypetext => $authtypes->{$thisauthtype}{'authtypetext'},
			);
	push @authtypesloop, \%row;
}

$template->param(authtypesloop => \@authtypesloop,
				authtypetext => $authtypes->{$authtypecode}{'authtypetext'},
				);
output_html_with_http_headers $input, $cookie, $template->output;