#!/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 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::Biblio;
use C4::Items;
use C4::Context;
use C4::Koha; # XXX subfield_is_koha_internal_p
use C4::Branch; # XXX subfield_is_koha_internal_p
use C4::ClassSource;
use C4::Dates;

use MARC::File::XML;

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);
}

sub get_item_from_barcode {
    my ($barcode)=@_;
    my $dbh=C4::Context->dbh;
    my $result;
    my $rq=$dbh->prepare("SELECT itemnumber from items where items.barcode=?");
    $rq->execute($barcode);
    ($result)=$rq->fetchrow;
    return($result);
}

my $input = new CGI;
my $dbh = C4::Context->dbh;
my $error        = $input->param('error');
my $biblionumber = $input->param('biblionumber');
my $itemnumber   = $input->param('itemnumber');
my $op           = $input->param('op');

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 $frameworkcode = &GetFrameworkCode($biblionumber);

my $today_iso = C4::Dates->today('iso');
$template->param(today_iso => $today_iso);

my $tagslib = &GetMarcStructure(1,$frameworkcode);
my $record = GetMarcBiblio($biblionumber);
my $oldrecord = TransformMarcToKoha($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 = TransformHtmlToXml(\@tags,\@subfields,\@values,\@indicator,\@ind_tag, 'ITEM');
    my $record = MARC::Record::new_from_xml($xml, 'UTF-8');
    # if autoBarcode is set to 'incremental', calculate barcode...
	# NOTE: This code is subject to change in 3.2 with the implemenation of ajax based autobarcode code
	# NOTE: 'incremental' is the ONLY autoBarcode option available to those not using javascript
    if (C4::Context->preference('autoBarcode') eq 'incremental') {
        my ($tagfield,$tagsubfield) = &GetMarcFromKohaField("items.barcode",$frameworkcode);
        unless ($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 $addedolditem = TransformMarcToKoha($dbh,$record);
    my $exist_itemnumber = get_item_from_barcode($addedolditem->{'barcode'});
    push @errors,"barcode_not_unique" if($exist_itemnumber);
    # if barcode exists, don't create, but report The problem.
    my ($oldbiblionumber,$oldbibnum,$oldbibitemnum) = AddItemFromMarc($record,$biblionumber) unless ($exist_itemnumber);
    $nextop = "additem";
    if ($exist_itemnumber) {
        $itemrecord = $record;
    }
#-------------------------------------------------------------------------------
} elsif ($op eq "edititem") {
#-------------------------------------------------------------------------------
# retrieve item if exist => then, it's a modif
    $itemrecord = C4::Items::GetMarcItem($biblionumber,$itemnumber);
    $nextop = "saveitem";
#-------------------------------------------------------------------------------
} elsif ($op eq "delitem") {
#-------------------------------------------------------------------------------
    # check that there is no issue on this item before deletion.
    my $sth=$dbh->prepare("select * from issues i where i.itemnumber=?");
    $sth->execute($itemnumber);
    my $onloan=$sth->fetchrow;
	$sth->finish();
    $nextop="additem";
    if ($onloan){
        push @errors,"book_on_loan";
    } else {
		# check it doesnt have a waiting reserve
		$sth=$dbh->prepare("SELECT * FROM reserves WHERE found = 'W' AND itemnumber = ?");
		$sth->execute($itemnumber);
		my $reserve=$sth->fetchrow;
		unless ($reserve){
			&DelItem($dbh,$biblionumber,$itemnumber);
			print $input->redirect("additem.pl?biblionumber=$biblionumber&frameworkcode=$frameworkcode");
            exit;
		}
        push @errors,"book_reserved";
    }
#-------------------------------------------------------------------------------
} elsif ($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 = TransformHtmlToXml(\@tags,\@subfields,\@values,\@indicator,\@ind_tag,'ITEM');
    my $itemtosave=MARC::Record::new_from_xml($xml, 'UTF-8');
    # MARC::Record builded => now, record in DB
    # warn "R: ".$record->as_formatted;
    # check that the barcode don't exist already
    my $addedolditem = TransformMarcToKoha($dbh,$itemtosave);
    my $exist_itemnumber = get_item_from_barcode($addedolditem->{'barcode'});
    if ($exist_itemnumber && $exist_itemnumber != $itemnumber) {
        push @errors,"barcode_not_unique";
    } else {
        my ($oldbiblionumber,$oldbibnum,$oldbibitemnum) = ModItemFromMarc($itemtosave,$biblionumber,$itemnumber);
        $itemnumber="";
    }
    $nextop="additem";
}

#
#-------------------------------------------------------------------------------
# build screen with existing items. and "new" one
#-------------------------------------------------------------------------------

# now, build existiing item list
my $temp = GetMarcBiblio( $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) = &GetMarcFromKohaField("items.itemnumber", $frameworkcode);
my ($branchtagfield, $branchtagsubfield) = &GetMarcFromKohaField("items.homebranch", $frameworkcode);

foreach my $field (@fields) {
    next if ($field->tag()<10);
    my @subf = $field->subfields;
    (defined @subf) or @subf = ();
    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);
		if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{tab}  eq 10) {
        	$this_row{$subf[$i][0]}=GetAuthorisedValueDesc( $field->tag(),
                        $subf[$i][0], $subf[$i][1], '', $tagslib) 
						|| $subf[$i][1];
		}

        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{itemnumber} = $subf[$i][1] if ($field->tag() eq $itemtagfield && $subf[$i][0] eq $itemtagsubfield);
    }
    if (%this_row) {
        push(@big_array, \%this_row);
    }
}

my ($holdingbrtagf,$holdingbrtagsubf) = &GetMarcFromKohaField("items.holdingbranch",$frameworkcode);
@big_array = sort {$a->{$holdingbrtagsubf} cmp $b->{$holdingbrtagsubf}} @big_array;

# now, construct template !
# First, the existing items for display
my @item_value_loop;
my @header_value_loop;
for my $row ( @big_array ) {
    my %row_data;
    my @item_fields = map +{ field => $_ || '' }, @$row{ sort keys(%witness) };
    $row_data{item_value} = [ @item_fields ];
    $row_data{itemnumber} = $row->{itemnumber};
    #reporting this_row values
    $row_data{'nomod'} = $row->{'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);
}

# now, build the item form for entering a new item
my @loop_data =();
my $i=0;
my $authorised_values_sth = $dbh->prepare("SELECT authorised_value,lib FROM authorised_values WHERE category=? ORDER BY lib");

my $onlymine = C4::Context->preference('IndependantBranches') && 
               C4::Context->userenv                           && 
               C4::Context->userenv->{flags}!=1               && 
               C4::Context->userenv->{branch};
my $branches = GetBranches($onlymine);  # build once ahead of time, instead of multiple times later.

foreach my $tag (sort keys %{$tagslib}) {
# 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;
 
    my $index_subfield = int(rand(1000000)); 
    if ($subfield eq '@'){
        $subfield_data{id} = "tag_".$tag."_subfield_00_".$index_subfield;
    } else {
        $subfield_data{id} = "tag_".$tag."_subfield_".$subfield."_".$index_subfield;
    }
    $subfield_data{tag}        = $tag;
    $subfield_data{subfield}   = $subfield;
    $subfield_data{random}     = int(rand(1000000));    # why do we need 2 different randoms?
#   $subfield_data{marc_lib}   = $tagslib->{$tag}->{$subfield}->{lib};
    $subfield_data{marc_lib}   ="<span id=\"error$i\" title=\"".$tagslib->{$tag}->{$subfield}->{lib}."\">".$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);
    $value =~ s/"/&quot;/g;
    unless ($value) {
        $value = $tagslib->{$tag}->{$subfield}->{defaultvalue};
        # get today date & replace YYYY, MM, DD if provided in the default value
        my ( $year, $month, $day ) = split ',', $today_iso;
        $value =~ s/YYYY/$year/g;
        $value =~ s/MM/$month/g;
        $value =~ s/DD/$day/g;
    }
    $subfield_data{visibility} = "display:none;" if (($tagslib->{$tag}->{$subfield}->{hidden} > 4) || ($tagslib->{$tag}->{$subfield}->{hidden} < -4));
    # 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}) ;
    # $test and print $input->redirect(".pl?biblionumber=$biblionumber") and exit;
        # search for itemcallnumber if applicable
    my $pref_itemcallnumber = C4::Context->preference('itemcallnumber');
    if (!$value && $tagslib->{$tag}->{$subfield}->{kohafield} eq 'items.itemcallnumber' && $pref_itemcallnumber) {
        my $CNtag       = substr($pref_itemcallnumber, 0, 3);
        my $CNsubfield  = substr($pref_itemcallnumber, 3, 1);
        my $CNsubfield2 = substr($pref_itemcallnumber, 4, 1);
        my $temp2 = $temp->field($CNtag);
        if ($temp2) {
            $value = ($temp2->subfield($CNsubfield)).' '.($temp2->subfield($CNsubfield2));
            #remove any trailing space incase one subfield is used
            $value =~ s/^\s+|\s+$//g;
        }
    }

    my $attributes_no_value = qq(tabindex="1" id="$subfield_data{id}" name="field_value" class="input_marceditor" size="67" maxlength="255" );
    my $attributes          = qq($attributes_no_value value="$value" );
    if ( $tagslib->{$tag}->{$subfield}->{authorised_value} ) {
      my @authorised_values;
      my %authorised_lib;
      # builds list, depending on authorised value...
  
      if ( $tagslib->{$tag}->{$subfield}->{authorised_value} eq "branches" ) {
          foreach my $thisbranch ( sort keys %$branches ) {
              push @authorised_values, $thisbranch;
              $authorised_lib{$thisbranch} = $branches->{$thisbranch}->{'branchname'};
          }
      }
      elsif ( $tagslib->{$tag}->{$subfield}->{authorised_value} eq "itemtypes" ) {
          push @authorised_values, "" unless ( $tagslib->{$tag}->{$subfield}->{mandatory} );
          my $sth = $dbh->prepare("select itemtype,description from itemtypes order by description");
          $sth->execute;
          my $itemtype;     # FIXME: double declaration of $itemtype
          while ( my ( $itemtype, $description ) = $sth->fetchrow_array ) {
              push @authorised_values, $itemtype;
              $authorised_lib{$itemtype} = $description;
          }

          unless ( $value ) {
              my $default_itemtype;
              my $itype_sth = $dbh->prepare("SELECT itemtype FROM biblioitems WHERE biblionumber = ?");
              $itype_sth->execute( $biblionumber );
              ( $default_itemtype ) = $itype_sth->fetchrow_array;
              $value = $default_itemtype;
          }
  
          #---- class_sources
      }
      elsif ( $tagslib->{$tag}->{$subfield}->{authorised_value} eq "cn_source" ) {
          push @authorised_values, "" unless ( $tagslib->{$tag}->{$subfield}->{mandatory} );
            
          my $class_sources = GetClassSources();
          my $default_source = C4::Context->preference("DefaultClassificationSource");
          
          foreach my $class_source (sort keys %$class_sources) {
              next unless $class_sources->{$class_source}->{'used'} or
                          ($value and $class_source eq $value)      or
                          ($class_source eq $default_source);
              push @authorised_values, $class_source;
              $authorised_lib{$class_source} = $class_sources->{$class_source}->{'description'};
          }
		  $value = $default_source unless ($value);

          #---- "true" authorised value
      }
      else {
          push @authorised_values, "" unless ( $tagslib->{$tag}->{$subfield}->{mandatory} );
          $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;
          }
      }
      $subfield_data{marc_value} =CGI::scrolling_list( # FIXME: factor out scrolling_list
          -name     => "field_value",
          -values   => \@authorised_values,
          -default  => $value,
          -labels   => \%authorised_lib,
          -override => 1,
          -size     => 1,
          -multiple => 0,
          -tabindex => 1,
          -id       => "tag_".$tag."_subfield_".$subfield."_".$index_subfield,
          -class    => "input_marceditor",
      );
    # it's a thesaurus / authority field
    }
    elsif ( $tagslib->{$tag}->{$subfield}->{authtypecode} ) {
        $subfield_data{marc_value} = "<input type=\"text\" $attributes />
            <a href=\"#\" class=\"buttonDot\"
                onclick=\"Dopop('/cgi-bin/koha/authorities/auth_finder.pl?authtypecode=".$tagslib->{$tag}->{$subfield}->{authtypecode}."&index=$subfield_data{id}','$subfield_data{id}'); return false;\" title=\"Tag Editor\">...</a>
    ";
    # it's a plugin field
    }
    elsif ( $tagslib->{$tag}->{$subfield}->{value_builder} ) {
        # opening plugin
        my $plugin = C4::Context->intranetdir . "/cataloguing/value_builder/" . $tagslib->{$tag}->{$subfield}->{'value_builder'};
        if (do $plugin) {
            my $extended_param = plugin_parameters( $dbh, $temp, $tagslib, $subfield_data{id}, \@loop_data );
            my ( $function_name, $javascript ) = plugin_javascript( $dbh, $temp, $tagslib, $subfield_data{id}, \@loop_data );
            $subfield_data{marc_value} = qq[<input $attributes
                onfocus="Focus$function_name($subfield_data{random}, '$subfield_data{id}');"
                 onblur=" Blur$function_name($subfield_data{random}, '$subfield_data{id}');" />
                <a href="#" class="buttonDot" onclick="Clic$function_name('$subfield_data{id}'); return false;" title="Tag Editor">...</a>
                $javascript];
        } else {
            warn "Plugin Failed: $plugin";
            $subfield_data{marc_value} = "<input $attributes />"; # supply default input form
        }
    }
    elsif ( $tag eq '' ) {       # it's an hidden field
        $subfield_data{marc_value} = qq(<input type="hidden" $attributes />);
    }
    elsif ( $tagslib->{$tag}->{$subfield}->{'hidden'} ) {   # FIXME: shouldn't input type be "hidden" ?
        $subfield_data{marc_value} = qq(<input type="text" $attributes />);
    }
    elsif ( length($value) > 100
            or (C4::Context->preference("marcflavour") eq "UNIMARC" and
                  300 <= $tag && $tag < 400 && $subfield eq 'a' )
            or (C4::Context->preference("marcflavour") eq "MARC21"  and
                  500 <= $tag && $tag < 600                     )
          ) {
        # oversize field (textarea)
        $subfield_data{marc_value} = "<textarea $attributes_no_value>$value</textarea>\n";
    } else {
        # it's a standard field
         $subfield_data{marc_value} = "<input $attributes />";
    }
#   $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( title => $record->title() ) if ($record ne "-1");
$template->param(
    biblionumber => $biblionumber,
    title        => $oldrecord->{title},
    author       => $oldrecord->{author},
    item_loop        => \@item_value_loop,
    item_header_loop => \@header_value_loop,
    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;