#!/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 CGI;
use strict;
use C4::Auth;
use C4::Output;
use C4::Interface::CGI::Output;
use C4::Biblio;
use C4::Context;
use C4::Koha; # XXX subfield_is_koha_internal_p
use C4::Search;
use HTML::Template;
use MARC::File::USMARC;

sub find_value {
	my ($tagfield,$insubfield,$record) = @_;
	my $result;
	my $indicator;
	foreach my $field ($record->field($tagfield)) {
		my @subfields = $field->subfields();
		foreach my $subfield (@subfields) {
			if (@$subfield[0] eq $insubfield) {
				$result .= @$subfield[1];
				$indicator = $field->indicator(1).$field->indicator(2);
			}
		}
	}
	return($indicator,$result);
}
my $input = new CGI;
my $dbh = C4::Context->dbh;
my $error = $input->param('error');
my $biblionumber = $input->param('biblionumber');
my $biblioitemnumber = find_biblioitemnumber($dbh,$biblionumber);
my $itemnumber = $input->param('itemnumber');
my $op = $input->param('op');

# find itemtype
my $itemtype = &MARCfind_frameworkcode($dbh,$biblionumber);

my $tagslib = &MARCgettagslib($dbh,1,$itemtype);
my $record = MARCgetbiblio($dbh,$biblionumber);
# warn "==>".$record->as_formatted;
my $oldrecord = MARCmarc2koha($dbh,$record);
my $itemrecord;
my $nextop="additem";
my @errors; # store errors found while checking data BEFORE saving item.
#------------------------------------------------------------------------------------------------------------------------------
if ($op eq "additem") {
#------------------------------------------------------------------------------------------------------------------------------
	# 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 $xml = MARChtml2xml(\@tags,\@subfields,\@values,\@indicator,\@ind_tag);
        my $record=MARC::Record::new_from_xml($xml, 'UTF-8');
	# if autoBarcode is ON, calculate barcode...
	if (C4::Context->preference('autoBarcode')) {
		my ($tagfield,$tagsubfield) = &MARCfind_marc_from_kohafield($dbh,"items.barcode");
		unless ($record->field($tagfield)->subfield($tagsubfield)) {
			my $sth_barcode = $dbh->prepare("select max(abs(barcode)) from items");
			$sth_barcode->execute;
			my ($newbarcode) = $sth_barcode->fetchrow;
			$newbarcode++;
			# OK, we have the new barcode, now create the entry in MARC record
			my $fieldItem = $record->field($tagfield);
			$record->delete_field($fieldItem);
			$fieldItem->add_subfields($tagsubfield => $newbarcode);
			$record->insert_fields_ordered($fieldItem);
		}
	}
# check for item barcode # being unique
	my $addedolditem = MARCmarc2koha($dbh,$record);
	my $exists = get_item_from_barcode($addedolditem->{'barcode'});
	push @errors,"barcode_not_unique" if($exists);
	# if barcode exists, don't create, but report The problem.
	$itemnumber = NEWnewitem($dbh,$record,$biblionumber,$biblioitemnumber) unless ($exists);
	$nextop = "additem";
#------------------------------------------------------------------------------------------------------------------------------
} elsif ($op eq "edititem") {
#------------------------------------------------------------------------------------------------------------------------------
# retrieve item if exist => then, it's a modif
	$itemrecord = MARCgetitem($dbh,$biblionumber,$itemnumber);
	$nextop="saveitem";
#------------------------------------------------------------------------------------------------------------------------------
} elsif ($op eq "delitem") {
#------------------------------------------------------------------------------------------------------------------------------
# retrieve item if exist => then, it's a modif
	&NEWdelitem($dbh,$biblionumber,$itemnumber);
	$nextop="additem";
#------------------------------------------------------------------------------------------------------------------------------
} elsif ($op eq "saveitem") {
#------------------------------------------------------------------------------------------------------------------------------
	# 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 $itemnumber = $input->param('itemnumber');
	my $xml = MARChtml2xml(\@tags,\@subfields,\@values,\@indicator,\@ind_tag);
        my $itemrecord=MARC::Record::new_from_xml($xml, 'UTF-8');
# MARC::Record builded => now, record in DB
# warn "R: ".$record->as_formatted;
	my ($oldbiblionumber,$oldbibnum,$oldbibitemnum) = NEWmoditem($dbh,$record,$biblionumber,$itemnumber,0);
	$itemnumber="";
	$nextop="additem";
}

#
#------------------------------------------------------------------------------------------------------------------------------
# build screen with existing items. and "new" one
#------------------------------------------------------------------------------------------------------------------------------
my ($template, $loggedinuser, $cookie)
    = get_template_and_user({template_name => "cataloguing/additem.tmpl",
			     query => $input,
			     type => "intranet",
			     authnotrequired => 0,
			     flagsrequired => {editcatalogue => 1},
			     debug => 1,
			     });

my %indicators;
$indicators{995}='  ';
# now, build existiing item list
my $temp = MARCgetbiblio($dbh,$biblionumber);
my @fields = $temp->fields();
#my @fields = $record->fields();
my %witness; #---- stores the list of subfields used at least once, with the "meaning" of the code
my @big_array;
#---- finds where items.itemnumber is stored
my ($itemtagfield,$itemtagsubfield) = &MARCfind_marc_from_kohafield($dbh,"items.itemnumber",$itemtype);
my ($branchtagfield,$branchtagsubfield) = &MARCfind_marc_from_kohafield($dbh,"items.homebranch",$itemtype);

foreach my $field (@fields) {
	next if ($field->tag()<10);
	my @subf=$field->subfields;
	my %this_row;
# loop through each subfield
	for my $i (0..$#subf) {
		next if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{tab}  ne 10 && ($field->tag() ne $itemtagfield && $subf[$i][0] ne $itemtagsubfield));
		$witness{$subf[$i][0]} = $tagslib->{$field->tag()}->{$subf[$i][0]}->{lib} if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{tab}  eq 10);
		$this_row{$subf[$i][0]} =$subf[$i][1] if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{tab}  eq 10);
		if (($field->tag eq $branchtagfield) && ($subf[$i][$0] eq $branchtagsubfield) && C4::Context->preference("IndependantBranches")) {
			#verifying rights
			my $userenv = C4::Context->userenv;
			unless (($userenv->{'flags'} == 1) or (($userenv->{'branch'} eq $subf[$i][1]))){
					$this_row{'nomod'}=1;
			}
		}
		$this_row{itemnum} = $subf[$i][1] if ($field->tag() eq $itemtagfield && $subf[$i][0] eq $itemtagsubfield);
	}
	if (%this_row) {
		push(@big_array, \%this_row);
	}
}
#fill big_row with missing datas
foreach my $subfield_code  (keys(%witness)) {
	for (my $i=0;$i<=$#big_array;$i++) {
		$big_array[$i]{$subfield_code}="&nbsp;" unless ($big_array[$i]{$subfield_code});
	}
}
my ($holdingbrtagf,$holdingbrtagsubf) = &MARCfind_marc_from_kohafield($dbh,"items.holdingbranch",$itemtype);
@big_array = sort {$a->{$holdingbrtagsubf} cmp $b->{$holdingbrtagsubf}} @big_array;

# now, construct template !
my @item_value_loop;
my @header_value_loop;
for (my $i=0;$i<=$#big_array; $i++) {
	my $items_data;
	foreach my $subfield_code (sort keys(%witness)) {
		$items_data .="<td>".$big_array[$i]{$subfield_code}."</td>";
	}
	my %row_data;
	$row_data{item_value} = $items_data;
	$row_data{itemnum} = $big_array[$i]->{itemnum};
	#reporting this_row values
	$row_data{'nomod'} = $big_array[$i]{'nomod'};
	push(@item_value_loop,\%row_data);
}
foreach my $subfield_code (sort keys(%witness)) {
	my %header_value;
	$header_value{header_value} = $witness{$subfield_code};
	push(@header_value_loop, \%header_value);
}

# next item form
my @loop_data =();
my $i=0;
my $authorised_values_sth = $dbh->prepare("select authorised_value,lib from authorised_values where category=? order by lib");

foreach my $tag (sort keys %{$tagslib}) {
	my $previous_tag = '';
# loop through each subfield
	foreach my $subfield (sort keys %{$tagslib->{$tag}}) {
		next if subfield_is_koha_internal_p($subfield);
		next if ($tagslib->{$tag}->{$subfield}->{'tab'}  ne "10");
		my %subfield_data;
		$subfield_data{tag}=$tag;
		$subfield_data{subfield}=$subfield;
#		$subfield_data{marc_lib}=$tagslib->{$tag}->{$subfield}->{lib};
		$subfield_data{marc_lib}="<span id=\"error$i\">".$tagslib->{$tag}->{$subfield}->{lib}."</span>";
		$subfield_data{mandatory}=$tagslib->{$tag}->{$subfield}->{mandatory};
		$subfield_data{repeatable}=$tagslib->{$tag}->{$subfield}->{repeatable};
		my ($x,$value);
		($x,$value) = find_value($tag,$subfield,$itemrecord) if ($itemrecord);
		#testing branch value if IndependantBranches.
		my $test = (C4::Context->preference("IndependantBranches")) && 
					($tag eq $branchtagfield) && ($subfield eq $branchtagsubfield) &&
					(C4::Context->userenv->{flags} != 1) && ($value) && ($value ne C4::Context->userenv->{branch}) ;
# 		print $input->redirect(".pl?biblionumber=$biblionumber") if ($test);
		# search for itemcallnumber if applicable
		if ($tagslib->{$tag}->{$subfield}->{kohafield} eq 'items.itemcallnumber' && C4::Context->preference('itemcallnumber')) {
			my $CNtag = substr(C4::Context->preference('itemcallnumber'),0,3);
			my $CNsubfield = substr(C4::Context->preference('itemcallnumber'),3,1);
			my $temp = $record->field($CNtag);
			if ($temp) {
				$value = $temp->subfield($CNsubfield);
			}
		}
		if ($tagslib->{$tag}->{$subfield}->{authorised_value}) {
			my @authorised_values;
			my %authorised_lib;
			# builds list, depending on authorised value...
			#---- branch
			if ($tagslib->{$tag}->{$subfield}->{'authorised_value'} eq "branches" ) {
				if ((C4::Context->preference("IndependantBranches")) && (C4::Context->userenv->{flags} != 1)){
						my $sth=$dbh->prepare("select branchcode,branchname from branches where branchcode = ? order by branchname");
						$sth->execute(C4::Context->userenv->{branch});
						push @authorised_values, "" unless ($tagslib->{$tag}->{$subfield}->{mandatory});
						while (my ($branchcode,$branchname) = $sth->fetchrow_array) {
							push @authorised_values, $branchcode;
							$authorised_lib{$branchcode}=$branchname;
						}
				} else {
					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;
				}
			#---- "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;
				}
			}
			$subfield_data{marc_value}= CGI::scrolling_list(-name=>'field_value',
																		-values=> \@authorised_values,
																		-default=>"$value",
																		-labels => \%authorised_lib,
																		-size=>1,
																		-multiple=>0,
																		);
		} elsif ($tagslib->{$tag}->{$subfield}->{thesaurus_category}) {
			$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\"  size=47 maxlength=255> <a href=\"javascript:Dopop('../thesaurus_popup.pl?category=$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,$record,$tagslib,$i,0);
			my ($function_name,$javascript) = plugin_javascript($dbh,$record,$tagslib,$i,0);
			$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\"  size=47 maxlength=255 DISABLE READONLY OnFocus=\"javascript:Focus$function_name($i)\" OnBlur=\"javascript:Blur$function_name($i)\"> <a href=\"javascript:Clic$function_name($i)\">...</a> $javascript";
		} else {
			$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\" value=\"$value\" size=50 maxlength=255>";
		}
#		$subfield_data{marc_value}="<input type=\"text\" name=\"field_value\">";
		push(@loop_data, \%subfield_data);
		$i++
	}
}

# what's the next op ? it's what we are not in : an add if we're editing, otherwise, and edit.
$template->param(item_loop => \@item_value_loop,
						item_header_loop => \@header_value_loop,
						biblionumber => $biblionumber,
						title => $oldrecord->{title},
						author => $oldrecord->{author},
						item => \@loop_data,
						itemnumber => $itemnumber,
						itemtagfield => $itemtagfield,
						itemtagsubfield =>$itemtagsubfield,
						op => $nextop,
						opisadd => ($nextop eq "saveitem")?0:1);
foreach my $error (@errors) {
	$template->param($error => 1);
}
output_html_with_http_headers $input, $cookie, $template->output;
