#!/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 C4::Debug;
use YAML;
use Switch;
use MARC::File::XML;

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

my $template_name;
my $template_flag;
if (!defined $op) {
    $template_name = "tools/batchMod.tmpl";
    $template_flag = { tools => '*' };
} else {
    $template_name = ($del) ? "tools/batchMod-del.tmpl" : "tools/batchMod-edit.tmpl";
    $template_flag = ($del) ? { tools => 'batchdel' }   : { tools => 'batchmod' };
}


my ($template, $loggedinuser, $cookie)
    = get_template_and_user({template_name => $template_name,
                 query => $input,
                 type => "intranet",
                 authnotrequired => 0,
                 flagsrequired => $template_flag,
                 });


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

my $itemrecord;
my $nextop="";
my @errors; # store errors found while checking data BEFORE saving item.
my $items_display_hashref;
my $frameworkcode="";
my $tagslib = &GetMarcStructure(1,$frameworkcode);

my $deleted_items = 0;     # Numbers of deleted items
my $not_deleted_items = 0; # Numbers of items that could not be deleted
my @not_deleted;           # List of the itemnumbers that could not be deleted

#--- ----------------------------------------------------------------------------
if ($op eq "action") {
#-------------------------------------------------------------------------------
    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 $marcitem = MARC::Record::new_from_xml($xml, 'UTF-8');
    my $localitem = TransformMarcToKoha( $dbh, $marcitem, "", 'items' );

    foreach my $itemnumber(@itemnumbers){
	    my $itemdata=GetItem($itemnumber);
	    if ($input->param("del")){
		    my $return = DelItemCheck(C4::Context->dbh, $itemdata->{'biblionumber'}, $itemdata->{'itemnumber'});
		    if ($return == 1) {
			$deleted_items++;
		    } else {
			$not_deleted_items++;
			push @not_deleted, { itemnumber => $itemdata->{'itemnumber'}, barcode => $itemdata->{'barcode'}, title => $itemdata->{'title'}, $return => 1 };
		    }
	    } else {
		    my $localmarcitem=Item2Marc($itemdata);
		    UpdateMarcWith($marcitem,$localmarcitem);
		    eval{my ($oldbiblionumber,$oldbibnum,$oldbibitemnum) = ModItemFromMarc($localmarcitem,$itemdata->{biblionumber},$itemnumber)};
	    }
    }
    $items_display_hashref=BuildItemsData(@itemnumbers);
}

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

if ($op eq "show"){
	my $filefh = $input->upload('uploadfile');
	my $filecontent = $input->param('filecontent');
	my @notfoundbarcodes;

    my @contentlist;
    if ($filefh){
        while (my $content=<$filefh>){
            chomp $content;
            push @contentlist, $content;
        }

	switch ($filecontent) {
	    case "barcode_file" {
		foreach my $barcode (@contentlist) {

		    my $itemnumber = GetItemnumberFromBarcode($barcode);
		    if ($itemnumber) {
			push @itemnumbers,$itemnumber;
		    } else {
			push @notfoundbarcodes, $barcode;
		    }
		}

	    }

	    case "itemid_file" {
		@itemnumbers = @contentlist;
	    }
	}
    } else {
       if ( my $list=$input->param('barcodelist')){
        push my @barcodelist, split(/\s\n/, $list);

	foreach my $barcode (@barcodelist) {

	    my $itemnumber = GetItemnumberFromBarcode($barcode);
	    if ($itemnumber) {
		push @itemnumbers,$itemnumber;
	    } else {
		push @notfoundbarcodes, $barcode;
	    }
	}

    }
}
	$items_display_hashref=BuildItemsData(@itemnumbers);

# 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 $branches = GetBranchesLoop();  # build once ahead of time, instead of multiple times later.
my $pref_itemcallnumber = C4::Context->preference('itemcallnumber');


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);
	$value =~ s/"/&quot;/g;
	unless ($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;     # FIXME: iso dates don't have commas!
	    $value =~ s/YYYY/$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 $attributes_no_value;
	my $not_editable = 0;
	# Disable barcode and stock numbers batch editing
	my @not_editable_koha_fields = ( 'items.barcode', 'items.stocknumber' );
	foreach (@not_editable_koha_fields) {
	    my ($bctag, $bcsubfield) = GetMarcFromKohaField($_, $frameworkcode);
    	    if (($bctag eq $subfield_data{tag}) && ($bcsubfield eq $subfield_data{subfield})) {
		$not_editable = 1;
	    }

	}

	my $attributes;
	# If a field is found to be non-editable,
	if ($not_editable) {
		# We mark it as disabled, so the user won't be able to edit it
     		$attributes_no_value = qq(disabled="disabled"); 
		$attributes = $attributes_no_value;
		# We also remove it's data, so it won't be modified
		undef($subfield_data{tag});
		undef($subfield_data{subfield});
	} else {
	    $attributes_no_value = qq(tabindex="1" id="$subfield_data{id}" name="field_value" class="input_marceditor" size="67" maxlength="255" );
	    $attributes          = qq($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 $thisbranch (@$branches) {
		push @authorised_values, $thisbranch->{value};
		$authorised_lib{$thisbranch->{value}} = $thisbranch->{branchname};
		$value = $thisbranch->{value} if $thisbranch->{selected};
	    }
	}
	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;
	    while ( my ( $itemtype, $description ) = $sth->fetchrow_array ) {
		push @authorised_values, $itemtype;
		$authorised_lib{$itemtype} = $description;
	    }

          #---- 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 $temp;
            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++
  }
} # -- End foreach tag


    # what's the next op ? it's what we are not in : an add if we're editing, otherwise, and edit.
    $template->param(item => \@loop_data);
    if (@notfoundbarcodes) { 
	my @notfoundbarcodesloop = map{{barcode=>$_}}@notfoundbarcodes;
    	$template->param(notfoundbarcodes => \@notfoundbarcodesloop);
    }
    $nextop="action"
} # -- End action="show"

$template->param(%$items_display_hashref) if $items_display_hashref;
$template->param(
    op      => $nextop,
    $op => 1,
);

if ($op eq "action") {

    #my @not_deleted_loop = map{{itemnumber=>$_}}@not_deleted;

    $template->param(
	not_deleted_items => $not_deleted_items,
	deleted_items => $deleted_items,
	not_deleted_loop => \@not_deleted 
    );
}

foreach my $error (@errors) {
    $template->param($error => 1);
}
output_html_with_http_headers $input, $cookie, $template->output;
exit;


# ---------------- Functions

sub BuildItemsData{
	my @itemnumbers=@_;
		# now, build existiing item list
		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,   $itemtagsubfield) = &GetMarcFromKohaField("items.itemnumber", "");
		my ($branchtagfield, $branchtagsubfield) = &GetMarcFromKohaField("items.homebranch", "");
		foreach my $itemnumber (@itemnumbers){
			my $itemdata=GetItem($itemnumber);
			my $itemmarc=Item2Marc($itemdata);
			my $biblio=GetBiblioData($$itemdata{biblionumber});
			my %this_row;
			foreach my $field (grep {$_->tag() eq $itemtagfield} $itemmarc->fields()) {
				# loop through each subfield
				if (my $itembranchcode=$field->subfield($branchtagsubfield) && C4::Context->preference("IndependantBranches")) {
						#verifying rights
						my $userenv = C4::Context->userenv();
						unless (($userenv->{'flags'} == 1) or (($userenv->{'branch'} eq $itembranchcode))){
								$this_row{'nomod'}=1;
						}
				}
				my $tag=$field->tag();
				foreach my $subfield ($field->subfields) {
					my ($subfcode,$subfvalue)=@$subfield;
					next if ($tagslib->{$tag}->{$subfcode}->{tab} ne 10 
							&& $tag        ne $itemtagfield 
							&& $subfcode   ne $itemtagsubfield);

					$witness{$subfcode} = $tagslib->{$tag}->{$subfcode}->{lib} if ($tagslib->{$tag}->{$subfcode}->{tab}  eq 10);
					if ($tagslib->{$tag}->{$subfcode}->{tab}  eq 10) {
						$this_row{$subfcode}=GetAuthorisedValueDesc( $tag,
									$subfcode, $subfvalue, '', $tagslib) 
									|| $subfvalue;
					}

					$this_row{itemnumber} = $subfvalue if ($tag eq $itemtagfield && $subfcode eq $itemtagsubfield);
				}
			}
			$this_row{0}=join("\n",@$biblio{qw(title author ISBN)});
			$witness{0}="&nbsp;";
			if (%this_row) {
				push(@big_array, \%this_row);
			}
		}
		@big_array = sort {$a->{0} cmp $b->{0}} @big_array;

		# now, construct template !
		# First, the existing items for display
		my @item_value_loop;
		my @witnesscodessorted=sort keys %witness;
		for my $row ( @big_array ) {
			my %row_data;
			my @item_fields = map +{ field => $_ || '' }, @$row{ @witnesscodessorted };
			$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);
		}
		my @header_loop=map { { header_value=> $witness{$_}} } @witnesscodessorted;
	return { item_loop        => \@item_value_loop, item_header_loop => \@header_loop };
}

#BE WARN : it is not the general case 
# This function can be OK in the item marc record special case
# Where subfield is not repeated
# And where we are sure that field should correspond
# And $tag>10
sub UpdateMarcWith($$){
  my ($marcfrom,$marcto)=@_;
  #warn "FROM :",$marcfrom->as_formatted;
	my (  $itemtag,   $itemtagsubfield) = &GetMarcFromKohaField("items.itemnumber", "");
	my $fieldfrom=$marcfrom->field($itemtag);
	my @fields_to=$marcto->field($itemtag);
    foreach my $subfield ($fieldfrom->subfields()){
		foreach my $field_to_update (@fields_to){
				$field_to_update->update($$subfield[0]=>$$subfield[1]) if ($$subfield[1]);
		}
    }
  #warn "TO edited:",$marcto->as_formatted;
}

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);
}



