#=====================================================================
# LedgerSMB Small Medium Business Accounting
# http://www.ledgersmb.org/
#

# Copyright (C) 2006
# This work contains copyrighted information from a number of sources all used
# with permission.
#
# This file contains source code included with or based on SQL-Ledger which
# is Copyright Dieter Simader and DWS Systems Inc. 2000-2005 and licensed 
# under the GNU General Public License version 2 or, at your option, any later 
# version.  For a full list including contact information of contributors, 
# maintainers, and copyright holders, see the CONTRIBUTORS file.
#
# Original Copyright Notice from SQL-Ledger 2.6.17 (before the fork):
# Copyright (c) 2001
#
#  Author: DWS Systems Inc.
#     Web: http://www.sql-ledger.org
#
#
#
#  Author: DWS Systems Inc.
#     Web: http://www.ledgersmb.org/
#
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#======================================================================
#
# Inventory invoicing module
#
#======================================================================


use LedgerSMB::IS;
use LedgerSMB::PE;
use LedgerSMB::Tax;

require "$form->{path}/arap.pl";
require "$form->{path}/io.pl";


1;
# end of main



sub add {

  $form->{title} = $locale->text('Add Sales Invoice');

  $form->{callback} = "$form->{script}?action=add&type=$form->{type}&login=$form->{login}&path=$form->{path}&sessionid=$form->{sessionid}" unless $form->{callback};

  &invoice_links;
  &prepare_invoice;
  &display_form;
  
}


sub edit {

  $form->{title} = $locale->text('Edit Sales Invoice');

  &invoice_links;
  &prepare_invoice;
  &display_form;
  
}


sub invoice_links {

  $form->{vc} = "customer";
  $form->{type} = "invoice";

  # create links
  $form->create_links("AR", \%myconfig, "customer", 1);
  
  # currencies
  @curr = split /:/, $form->{currencies};
  $form->{defaultcurrency} = $curr[0];
  chomp $form->{defaultcurrency};

  for (@curr) { $form->{selectcurrency} .= "<option>$_\n" }

  if (@{ $form->{all_customer} }) {
    unless ($form->{customer_id}) {
      $form->{customer_id} = $form->{all_customer}->[0]->{id};
    }
  }

  AA->get_name(\%myconfig, \%$form);
  delete $form->{notes};
  IS->retrieve_invoice(\%myconfig, \%$form);

  $form->{oldlanguage_code} = $form->{language_code};
  
  $form->get_partsgroup(\%myconfig, { language_code => $form->{language_code}, searchitems => 'nolabor' });
  
  if (@{ $form->{all_partsgroup} }) {
    $form->{selectpartsgroup} = "<option>\n";
    foreach $ref (@ { $form->{all_partsgroup} }) {
      if ($ref->{translation}) {
	$form->{selectpartsgroup} .= qq|<option value="$ref->{partsgroup}--$ref->{id}">$ref->{translation}\n|;
      } else {
	$form->{selectpartsgroup} .= qq|<option value="$ref->{partsgroup}--$ref->{id}">$ref->{partsgroup}\n|;
      }
    }
  }
  
  if (@{ $form->{all_project} }) {
    $form->{selectprojectnumber} = "<option>\n";
    for (@{ $form->{all_project} }) { $form->{selectprojectnumber} .= qq|<option value="$_->{projectnumber}--$_->{id}">$_->{projectnumber}\n| }
  }

  $form->{oldcustomer} = "$form->{customer}--$form->{customer_id}";
  $form->{oldtransdate} = $form->{transdate};
  
  $form->{selectcustomer} = "";
  if (@{ $form->{all_customer} }) {
    $form->{customer} = "$form->{customer}--$form->{customer_id}";
    for (@{ $form->{all_customer} }) { $form->{selectcustomer} .= qq|<option value="$_->{name}--$_->{id}">$_->{name}\n| }
  }

  # departments
  if (@{ $form->{all_department} }) {
    $form->{selectdepartment} = "<option>\n";
    $form->{department} = "$form->{department}--$form->{department_id}" if $form->{department_id};

    for (@{ $form->{all_department} }) { $form->{selectdepartment} .= qq|<option value="$_->{description}--$_->{id}">$_->{description}\n| }
  }
  
  $form->{employee} = "$form->{employee}--$form->{employee_id}";
  # sales staff
  if (@{ $form->{all_employee} }) {
    $form->{selectemployee} = "";
    for (@{ $form->{all_employee} }) { $form->{selectemployee} .= qq|<option value="$_->{name}--$_->{id}">$_->{name}\n| }
  }
  
  if (@{ $form->{all_language} }) {
    $form->{selectlanguage} = "<option>\n";
    for (@{ $form->{all_language} }) { $form->{selectlanguage} .= qq|<option value="$_->{code}">$_->{description}\n| }
  }
  
  # forex
  $form->{forex} = $form->{exchangerate};
  $exchangerate = ($form->{exchangerate}) ? $form->{exchangerate} : 1;
  
  foreach $key (keys %{ $form->{AR_links} }) {

    $form->{"select$key"} = "";
    foreach $ref (@{ $form->{AR_links}{$key} }) {
      $form->{"select$key"} .= "<option>$ref->{accno}--$ref->{description}\n";
    }

    if ($key eq "AR_paid") {
      for $i (1 .. scalar @{ $form->{acc_trans}{$key} }) {
	$form->{"AR_paid_$i"} = "$form->{acc_trans}{$key}->[$i-1]->{accno}--$form->{acc_trans}{$key}->[$i-1]->{description}";
	# reverse paid
	$form->{"paid_$i"} = $form->{acc_trans}{$key}->[$i-1]->{amount} * -1;
	$form->{"datepaid_$i"} = $form->{acc_trans}{$key}->[$i-1]->{transdate};
	$form->{"forex_$i"} = $form->{"exchangerate_$i"} = $form->{acc_trans}{$key}->[$i-1]->{exchangerate};
	$form->{"source_$i"} = $form->{acc_trans}{$key}->[$i-1]->{source};
	$form->{"memo_$i"} = $form->{acc_trans}{$key}->[$i-1]->{memo};
	$form->{"cleared_$i"} = $form->{acc_trans}{$key}->[$i-1]->{cleared};
	
	$form->{paidaccounts} = $i;
      }
    } else {
      $form->{$key} = "$form->{acc_trans}{$key}->[0]->{accno}--$form->{acc_trans}{$key}->[0]->{description}" if $form->{acc_trans}{$key}->[0]->{accno};
    }
    
  }

  for (qw(AR_links acc_trans)) { delete $form->{$_} }

  $form->{paidaccounts} = 1 unless (exists $form->{paidaccounts});

  $form->{AR} = $form->{AR_1} unless $form->{id};
  
  $form->{locked} = ($form->{revtrans}) ? '1' : ($form->datetonum(\%myconfig, $form->{transdate}) <= $form->datetonum(\%myconfig, $form->{closedto}));

  if (! $form->{readonly}) {
    $form->{readonly} = 1 if $myconfig{acs} =~ /AR--Sales Invoice/;
  }

}


sub prepare_invoice {

  $form->{type} = "invoice";
  $form->{formname} = "invoice";
  $form->{sortby} ||= "runningnumber";
  $form->{format} = "postscript" if $myconfig{printer};
  $form->{media} = $myconfig{printer};

  $form->{selectformname} = qq|<option value="invoice">|.$locale->text('Invoice').qq|
<option value="pick_list">|.$locale->text('Pick List').qq|
<option value="packing_list">|.$locale->text('Packing List');
  
  $i = 0;
  $form->{currency} =~ s/ //g;
  $form->{oldcurrency} = $form->{currency};
  
  if ($form->{id}) {
    
    for (qw(invnumber ordnumber ponumber quonumber shippingpoint shipvia notes intnotes)) { $form->{$_} = $form->quote($form->{$_}) }

    foreach $ref (@{ $form->{invoice_details} } ) {
      $i++;
      for (keys %$ref) { $form->{"${_}_$i"} = $ref->{$_} }

      $form->{"projectnumber_$i"} = qq|$ref->{projectnumber}--$ref->{project_id}| if $ref->{project_id};
      $form->{"partsgroup_$i"} = qq|$ref->{partsgroup}--$ref->{partsgroup_id}| if $ref->{partsgroup_id};

      $form->{"discount_$i"} = $form->format_amount(\%myconfig, $form->{"discount_$i"} * 100);

      ($dec) = ($form->{"sellprice_$i"} =~ /\.(\d+)/);
      $dec = length $dec;
      $decimalplaces = ($dec > 2) ? $dec : 2;

      $form->{"sellprice_$i"} = $form->format_amount(\%myconfig, $form->{"sellprice_$i"}, $decimalplaces);
      $form->{"qty_$i"} = $form->format_amount(\%myconfig, $form->{"qty_$i"});
      $form->{"oldqty_$i"} = $form->{"qty_$i"};
      
      for (qw(partnumber sku description unit)) { $form->{"${_}_$i"} = $form->quote($form->{"${_}_$i"}) }
      $form->{rowcount} = $i;
    }
  }
  
}



sub form_header {

  # set option selected
  for (qw(AR currency)) {
    $form->{"select$_"} =~ s/ selected//;
    $form->{"select$_"} =~ s/option>\Q$form->{$_}\E/option selected>$form->{$_}/;
  }
  
  for (qw(customer department employee)) {
    $form->{"select$_"} = $form->unescape($form->{"select$_"});
    $form->{"select$_"} =~ s/ selected//;
    $form->{"select$_"} =~ s/(<option value="\Q$form->{$_}\E")/$1 selected/;
  }
    
  $form->{exchangerate} = $form->format_amount(\%myconfig, $form->{exchangerate});

 
  $exchangerate = qq|<tr>|;
  $exchangerate .= qq|
		<th align=right nowrap>|.$locale->text('Currency').qq|</th>
		<td><select name=currency>$form->{selectcurrency}</select></td>
| if $form->{defaultcurrency};
  $exchangerate .= qq|
		<input type=hidden name=selectcurrency value="$form->{selectcurrency}">
		<input type=hidden name=defaultcurrency value=$form->{defaultcurrency}>
|;

  if ($form->{defaultcurrency} && $form->{currency} ne $form->{defaultcurrency}) {
    if ($form->{forex}) {
      $exchangerate .= qq|<th align=right>|.$locale->text('Exchange Rate').qq|</th><td>$form->{exchangerate}<input type=hidden name=exchangerate value=$form->{exchangerate}></td>|;
    } else {
      $exchangerate .= qq|<th align=right>|.$locale->text('Exchange Rate').qq|</th><td><input name=exchangerate size=10 value=$form->{exchangerate}></td>|;
    }
  }
  $exchangerate .= qq|
<input type=hidden name=forex value=$form->{forex}>
</tr>
|;

  if ($form->{selectcustomer}) {
    $customer = qq|<select name=customer>$form->{selectcustomer}</select>
                   <input type=hidden name="selectcustomer" value="|.
		   $form->escape($form->{selectcustomer},1).qq|">|;
  } else {
    $customer = qq|<input name=customer value="$form->{customer}" size=35>|;
  }
  
  $department = qq|
              <tr>
	        <th align="right" nowrap>|.$locale->text('Department').qq|</th>
		<td colspan=3><select name=department>$form->{selectdepartment}</select>
		<input type=hidden name=selectdepartment value="|.
		$form->escape($form->{selectdepartment},1).qq|">
		</td>
	      </tr>
| if $form->{selectdepartment};


  $n = ($form->{creditremaining} < 0) ? "0" : "1";


  if ($form->{business}) {
    $business = qq|
	      <tr>
		<th align=right nowrap>|.$locale->text('Business').qq|</th>
		<td>$form->{business}</td>
		<td width=10></td>
		<th align=right nowrap>|.$locale->text('Trade Discount').qq|</th>
		<td>|.$form->format_amount(\%myconfig, $form->{tradediscount} * 100).qq| %</td>
	      </tr>
|;
  }

  $employee = qq|
                <input type=hidden name=employee value="$form->{employee}">
|;


  $employee = qq|
	      <tr>
	        <th align=right nowrap>|.$locale->text('Salesperson').qq|</th>
		<td><select name=employee>$form->{selectemployee}</select></td>
		<input type=hidden name=selectemployee value="|.
		$form->escape($form->{selectemployee},1).qq|">
	      </tr>
| if $form->{selectemployee};

  $i = $form->{rowcount} + 1;
  $focus = "partnumber_$i";
  
  $form->header;

  print qq|
<body onLoad="document.forms[0].${focus}.focus()" />

<form method=post action="$form->{script}">
|;

  $form->hide_form(qw(id type media format printed emailed queued title vc terms discount creditlimit creditremaining tradediscount business closedto locked shipped oldtransdate recurring));
  
  print qq|
<table width=100%>
  <tr class=listtop>
    <th class=listtop>$form->{title}</th>
  </tr>
  <tr height="5"></tr>
  <tr>
    <td>
      <table width=100%>
	<tr valign=top>
	  <td>
	    <table>
	      <tr>
		<th align=right nowrap>|.$locale->text('Customer').qq|</th>
		<td colspan=3>$customer</td>
		<input type=hidden name=customer_id value=$form->{customer_id}>
		<input type=hidden name=oldcustomer value="$form->{oldcustomer}"> 
	      </tr>
	      <tr>
		<td></td>
		<td colspan=3>
		  <table>
		    <tr>
		      <th align=right nowrap>|.$locale->text('Credit Limit').qq|</th>
		      <td>|.$form->format_amount(\%myconfig, $form->{creditlimit}, 0, "0").qq|</td>
		      <td width=10></td>
		      <th align=right nowrap>|.$locale->text('Remaining').qq|</th>
		      <td class="plus$n" nowrap>|.$form->format_amount(\%myconfig, $form->{creditremaining}, 0, "0").qq|</td>
		    </tr>
		    $business
		  </table>
		</td>
	      </tr>
	      <tr>
		<th align=right nowrap>|.$locale->text('Record in').qq|</th>
		<td colspan=3><select name=AR>$form->{selectAR}</select></td>
		<input type=hidden name=selectAR value="$form->{selectAR}">
	      </tr>
	      $department
	      $exchangerate
	      <tr>
		<th align=right nowrap>|.$locale->text('Shipping Point').qq|</th>
		<td colspan=3><input name=shippingpoint size=35 value="$form->{shippingpoint}"></td>
	      </tr>
	      <tr>
		<th align=right nowrap>|.$locale->text('Ship via').qq|</th>
		<td colspan=3><input name=shipvia size=35 value="$form->{shipvia}"></td>
	      </tr>
	    </table>
	  </td>
	  <td align=right>
	    <table>
	      $employee
	      <tr>
		<th align=right nowrap>|.$locale->text('Invoice Number').qq|</th>
		<td><input name=invnumber size=20 value="$form->{invnumber}"></td>
	      </tr>
	      <tr>
		<th align=right nowrap>|.$locale->text('Order Number').qq|</th>
		<td><input name=ordnumber size=20 value="$form->{ordnumber}"></td>
<input type=hidden name=quonumber value="$form->{quonumber}">
	      </tr>
	      <tr>
		<th align=right>|.$locale->text('Invoice Date').qq|</th>
		<td><input name=transdate size=11 title="$myconfig{dateformat}" value=$form->{transdate}></td>
	      </tr>
	      <tr>
		<th align=right>|.$locale->text('Due Date').qq|</th>
		<td><input name=duedate size=11 title="$myconfig{dateformat}" value=$form->{duedate}></td>
	      </tr>
	      <tr>
		<th align=right nowrap>|.$locale->text('PO Number').qq|</th>
		<td><input name=ponumber size=20 value="$form->{ponumber}"></td>
	      </tr>
	    </table>
	  </td>
	</tr>
      </table>
    </td>
  </tr>
  <tr>
    <td>
    </td>
  </tr>
|;

  $form->hide_form(qw(shiptoname shiptoaddress1 shiptoaddress2 shiptocity shiptostate shiptozipcode shiptocountry shiptocontact shiptophone shiptofax shiptoemail message email subject cc bcc taxaccounts));
  
  foreach $item (split / /, $form->{taxaccounts}) {
    $form->hide_form("${item}_rate", "${item}_description", "${item}_taxnumber");
  }

}



sub form_footer {

  $form->{invtotal} = $form->{invsubtotal};

  if (($rows = $form->numtextrows($form->{notes}, 35, 8)) < 2) {
    $rows = 2;
  }
  if (($introws = $form->numtextrows($form->{intnotes}, 35, 8)) < 2) {
    $introws = 2;
  }
  $rows = ($rows > $introws) ? $rows : $introws;
  $notes = qq|<textarea name=notes rows=$rows cols=35 wrap=soft>$form->{notes}</textarea>|;
  $intnotes = qq|<textarea name=intnotes rows=$rows cols=35 wrap=soft>$form->{intnotes}</textarea>|;

  $form->{taxincluded} = ($form->{taxincluded}) ? "checked" : "";

  $taxincluded = "";
  if ($form->{taxaccounts}) {
    $taxincluded = qq|
              <tr height="5"></tr>
              <tr>
	        <td align=right>
	        <input name=taxincluded class=checkbox type=checkbox value=1 $form->{taxincluded}></td><th align=left>|.$locale->text('Tax Included').qq|</th>
	     </tr>
|;
  }

  if (!$form->{taxincluded}) {
    
    my @taxes = Tax::init_taxes($form, $form->{taxaccounts});
    $form->{invtotal} += Tax::calculate_taxes(\@taxes, $form, 
      $form->{invsubtotal}, 0);
    foreach $item (@taxes) {
      my $taccno = $item->account;
      $form->{"${taccno}_total"} = $form->format_amount(\%myconfig, 
        $item->value, 2);
      $tax .= qq|
        <tr>
      	<th align=right>$form->{"${taccno}_description"}</th>
      	<td align=right>$form->{"${taccno}_total"}</td>
        </tr>
	| if $item->value;
    }

    $form->{invsubtotal} = $form->format_amount(\%myconfig, $form->{invsubtotal}, 2, 0);
    
    $subtotal = qq|
	      <tr>
		<th align=right>|.$locale->text('Subtotal').qq|</th>
		<td align=right>$form->{invsubtotal}</td>
	      </tr>
|;

  }

  $form->{oldinvtotal} = $form->{invtotal};
  $form->{invtotal} = $form->format_amount(\%myconfig, $form->{invtotal}, 2, 0);
  
  print qq|
  <tr>
    <td>
      <table width=100%>
	<tr valign=bottom>
	  <td>
	    <table>
	      <tr>
		<th align=left>|.$locale->text('Notes').qq|</th>
		<th align=left>|.$locale->text('Internal Notes').qq|</th>
	      </tr>
	      <tr valign=top>
		<td>$notes</td>
		<td>$intnotes</td>
	      </tr>
	    </table>
	  </td>
	  <td align=right>
	    <table>
	      $subtotal
	      $tax
	      <tr>
		<th align=right>|.$locale->text('Total').qq|</th>
		<td align=right>$form->{invtotal}</td>
	      </tr>
	      $taxincluded
	    </table>
	  </td>
	</tr>
      </table>
    </td>
  </tr>
  <tr>
    <td>
      <table width=100%>
	<tr class=listheading>
	  <th colspan=6 class=listheading>|.$locale->text('Payments')
	  .qq|</th>
	</tr>
|;

  if ($form->{currency} eq $form->{defaultcurrency}) {
    @column_index = qw(datepaid source memo paid AR_paid);
  } else {
    @column_index = qw(datepaid source memo paid exchangerate AR_paid);
  }

  $column_data{datepaid} = "<th>".$locale->text('Date')."</th>";
  $column_data{paid} = "<th>".$locale->text('Amount')."</th>";
  $column_data{exchangerate} = "<th>".$locale->text('Exch')."</th>";
  $column_data{AR_paid} = "<th>".$locale->text('Account')."</th>";
  $column_data{source} = "<th>".$locale->text('Source')."</th>";
  $column_data{memo} = "<th>".$locale->text('Memo')."</th>";
  
  print "
	<tr>
";
  for (@column_index) { print "$column_data{$_}\n" }
  print "
        </tr>
";
  
  $form->{paidaccounts}++ if ($form->{"paid_$form->{paidaccounts}"});
  for $i (1 .. $form->{paidaccounts}) {

    $form->hide_form("cleared_$i");

    print "
        <tr>\n";

    $form->{"selectAR_paid_$i"} = $form->{selectAR_paid};
    $form->{"selectAR_paid_$i"} =~ s/option>\Q$form->{"AR_paid_$i"}\E/option selected>$form->{"AR_paid_$i"}/;
    
    # format amounts
    $totalpaid += $form->{"paid_$i"};
    $form->{"paid_$i"} = $form->format_amount(\%myconfig, $form->{"paid_$i"}, 2);
    $form->{"exchangerate_$i"} = $form->format_amount(\%myconfig, $form->{"exchangerate_$i"});

    $exchangerate = qq|&nbsp;|;
    if ($form->{currency} ne $form->{defaultcurrency}) {
      if ($form->{"forex_$i"}) {
	$exchangerate = qq|<input type=hidden name="exchangerate_$i" value=$form->{"exchangerate_$i"}>$form->{"exchangerate_$i"}|;
      } else {
	$exchangerate = qq|<input name="exchangerate_$i" size=10 value=$form->{"exchangerate_$i"}>|;
      }
    }

    $exchangerate .= qq|
<input type=hidden name="forex_$i" value=$form->{"forex_$i"}>
|;

    $column_data{paid} = qq|<td align=center><input name="paid_$i" size=11 value=$form->{"paid_$i"}></td>|;
    $column_data{exchangerate} = qq|<td align=center>$exchangerate</td>|;
    $column_data{AR_paid} = qq|<td align=center><select name="AR_paid_$i">$form->{"selectAR_paid_$i"}</select></td>|;
    $column_data{datepaid} = qq|<td align=center><input name="datepaid_$i" size=11 title="$myconfig{dateformat}" value=$form->{"datepaid_$i"}></td>|;
    $column_data{source} = qq|<td align=center><input name="source_$i" size=11 value="$form->{"source_$i"}"></td>|;
    $column_data{memo} = qq|<td align=center><input name="memo_$i" size=11 value="$form->{"memo_$i"}"></td>|;

    for (@column_index) { print qq|$column_data{$_}\n| }
    print "
        </tr>\n";
  }

  $form->{oldtotalpaid} = $totalpaid;
  $form->hide_form(qw(paidaccounts selectAR_paid oldinvtotal oldtotalpaid));
  
  print qq|
      </table>
    </td>
  </tr>
  <tr>
    <td><hr size=3 noshade></td>
  </tr>
  <tr>
    <td>
|;

  &print_options;

  print qq|
    </td>
  </tr>
</table>
<br>
|;


  $transdate = $form->datetonum(\%myconfig, $form->{transdate});
  $closedto = $form->datetonum(\%myconfig, $form->{closedto});

# type=submit $locale->text('Update')
# type=submit $locale->text('Print')
# type=submit $locale->text('Post')
# type=submit $locale->text('Print and Post')
# type=submit $locale->text('Schedule')
# type=submit $locale->text('Ship to')
# type=submit $locale->text('Post as new')
# type=submit $locale->text('Print and Post as new')
# type=submit $locale->text('E-mail')
# type=submit $locale->text('Delete')
# type=submit $locale->text('Sales Order')

  if (! $form->{readonly}) {
    
    %button = ('Update' => { ndx => 1, key => 'U', value => $locale->text('Update') },
	       'Print' => { ndx => 2, key => 'P', value => $locale->text('Print') },
	       'Post' => { ndx => 3, key => 'O', value => $locale->text('Post') },
	       'Ship to' => { ndx => 4, key => 'T', value => $locale->text('Ship to') },
	       'E-mail' => { ndx => 5, key => 'E', value => $locale->text('E-mail') },
	       'Print and Post' => { ndx => 6, key => 'R', value => $locale->text('Print and Post') },
	       'Post as new' => { ndx => 7, key => 'N', value => $locale->text('Post as new') },
	       'Print and Post as new' => { ndx => 8, key => 'W', value => $locale->text('Print and Post as new') },
	       'Sales Order' => { ndx => 9, key => 'L', value => $locale->text('Sales Order') },
	       'Schedule' => { ndx => 10, key => 'H', value => $locale->text('Schedule') },
	       'Delete' => { ndx => 11, key => 'D', value => $locale->text('Delete') },
	      );

    if ($form->{id}) {
      
      if ($form->{locked} || $transdate <= $closedto) {
	for ("Post", "Print and Post", "Delete") { delete $button{$_} }
      }
     
      if (!$latex) {
	for ("Print and Post", "Print and Post as new") { delete $button{$_} }
      }

    } else {

      if ($transdate > $closedto) {
	
	for ("Update", "Ship to", "Print", "E-mail", "Post", "Schedule") { $a{$_} = 1 }
	$a{'Print and Post'} = 1 if $latex;
	
      }
      for (keys %button) { delete $button{$_} if ! $a{$_} }
    }
    
    for (sort { $button{$a}->{ndx} <=> $button{$b}->{ndx} } keys %button) { $form->print_button(\%button, $_) }

  }

  if ($form->{menubar}) {
    require "$form->{path}/menu.pl";
    &menubar;
  }

  $form->hide_form(qw(rowcount callback path login sessionid));
  
  print qq|
</form>

</body>
</html>
|;

}


sub update {

  $form->{exchangerate} = $form->parse_amount(\%myconfig, $form->{exchangerate});
  
  if ($newname = &check_name(customer)) {
    &rebuild_vc(customer, AR, $form->{transdate}, 1);
  }
  if ($form->{transdate} ne $form->{oldtransdate}) {
    $form->{duedate} = ($form->{terms}) ? $form->current_date(\%myconfig, $form->{transdate}, $form->{terms} * 1) : $form->{duedate};
    $form->{oldtransdate} = $form->{transdate};
    &rebuild_vc(customer, AR, $form->{transdate}, 1) if ! $newname;

    if ($form->{currency} ne $form->{defaultcurrency}) {
      delete $form->{exchangerate};
      $form->{exchangerate} = $exchangerate if ($form->{forex} = ($exchangerate = $form->check_exchangerate(\%myconfig, $form->{currency}, $form->{transdate}, 'buy')));
    }

    $form->{selectemployee} = "";
    if (@{ $form->{all_employee} }) {
      for (@{ $form->{all_employee} }) { $form->{selectemployee} .= qq|<option value="$_->{name}--$_->{id}">$_->{name}\n| }
    }
  }

  if ($form->{currency} ne $form->{oldcurrency}) {
    delete $form->{exchangerate};
    $form->{exchangerate} = $exchangerate if ($form->{forex} = ($exchangerate = $form->check_exchangerate(\%myconfig, $form->{currency}, $form->{transdate}, 'buy')));
  }


  $j = 1;
  for $i (1 .. $form->{paidaccounts}) {
    if ($form->{"paid_$i"}) {
      for (qw(datepaid source memo cleared)) { $form->{"${_}_$j"} = $form->{"${_}_$i"} }
      for (qw(paid exchangerate)) { $form->{"${_}_$j"} = $form->parse_amount(\%myconfig, $form->{"${_}_$i"}) }

      $form->{"exchangerate_$j"} = $exchangerate if ($form->{"forex_$j"} = ($exchangerate = $form->check_exchangerate(\%myconfig, $form->{currency}, $form->{"datepaid_$j"}, 'buy')));
      if ($j++ != $i) {
	for (qw(datepaid source memo cleared paid exchangerate forex)) { delete $form->{"${_}_$i"} }
      }
    } else {
      for (qw(datepaid source memo cleared paid exchangerate forex)) { delete $form->{"${_}_$i"} }
    }
  }
  $form->{paidaccounts} = $j;

  $i = $form->{rowcount};
  $exchangerate = ($form->{exchangerate}) ? $form->{exchangerate} : 1;

  for (qw(partsgroup projectnumber)) {
    $form->{"select$_"} = $form->unescape($form->{"select$_"}) if $form->{"select$_"};
  }
    
  # if last row empty, check the form otherwise retrieve new item
  if (($form->{"partnumber_$i"} eq "") && ($form->{"description_$i"} eq "") && ($form->{"partsgroup_$i"} eq "")) {

    $form->{creditremaining} += ($form->{oldinvtotal} - $form->{oldtotalpaid});
    &check_form;

  } else {

    IS->retrieve_item(\%myconfig, \%$form);
    
    $rows = scalar @{ $form->{item_list} };

    if ($form->{language_code} && $rows == 0) {
      $language_code = $form->{language_code};
      $form->{language_code} = "";
      IS->retrieve_item(\%myconfig, \%$form);
      $form->{language_code} = $language_code;
      $rows = scalar @{ $form->{item_list} };
    }

    if ($rows) {
      
      if ($rows > 1) {
	
	&select_item;
	exit;
	
      } else {

	$form->{"qty_$i"} = ($form->{"qty_$i"} * 1) ? $form->{"qty_$i"} : 1;

	$sellprice = $form->parse_amount(\%myconfig, $form->{"sellprice_$i"});

	for (qw(partnumber description unit)) { $form->{item_list}[$i]{$_} = $form->quote($form->{item_list}[$i]{$_}) }
	for (keys %{ $form->{item_list}[0] }) { $form->{"${_}_$i"} = $form->{item_list}[0]{$_} }
	
	$form->{"discount_$i"} = $form->{discount} * 100;

	if ($sellprice) {
	  $form->{"sellprice_$i"} = $sellprice;
	  
	  ($dec) = ($form->{"sellprice_$i"} =~ /\.(\d+)/);
	  $dec = length $dec;
	  $decimalplaces1 = ($dec > 2) ? $dec : 2;
	} else {
	  ($dec) = ($form->{"sellprice_$i"} =~ /\.(\d+)/);
	  $dec = length $dec;
	  $decimalplaces1 = ($dec > 2) ? $dec : 2;
	  
	  $form->{"sellprice_$i"} /= $exchangerate;
	}
	
	($dec) = ($form->{"lastcost_$i"} =~ /\.(\d+)/);
	$dec = length $dec;
	$decimalplaces2 = ($dec > 2) ? $dec : 2;

	# if there is an exchange rate adjust sellprice
	for (qw(listprice lastcost)) { $form->{"${_}_$i"} /= $exchangerate }
	
        $amount = $form->{"sellprice_$i"} * $form->{"qty_$i"} * (1 - $form->{"discount_$i"} / 100);
	for (split / /, $form->{taxaccounts}) { $form->{"${_}_base"} = 0 }
        for (split / /, $form->{"taxaccounts_$i"}) { $form->{"${_}_base"} += $amount }
	if (!$form->{taxincluded}) {
	  my @taxes = Tax::init_taxes($form, $form->{"taxaccounts_$i"});
	  $amount += Tax::calculate_taxes(\@taxes, $form, $amount, 0);
	}
	
        $form->{creditremaining} -= $amount;
	
	for (qw(sellprice listprice)) { $form->{"${_}_$i"} = $form->format_amount(\%myconfig, $form->{"${_}_$i"}, $decimalplaces1) }
	$form->{"lastcost_$i"} = $form->format_amount(\%myconfig, $form->{"lastcost_$i"}, $decimalplaces2);
	
	$form->{"oldqty_$i"} = $form->{"qty_$i"};
	for (qw(qty discount)) { $form->{"{_}_$i"} =  $form->format_amount(\%myconfig, $form->{"${_}_$i"}) }

      }

      &display_form;

    } else {
      # ok, so this is a new part
      # ask if it is a part or service item

      if ($form->{"partsgroup_$i"} && ($form->{"partsnumber_$i"} eq "") && ($form->{"description_$i"} eq "")) {
	$form->{rowcount}--;
	&display_form;
      } else {
	
	$form->{"id_$i"}          = 0;
	$form->{"unit_$i"}        = $locale->text('ea');

	&new_item;
	
      }
    }
  }
}



sub post {

  $form->isblank("transdate", $locale->text('Invoice Date missing!'));
  $form->isblank("customer", $locale->text('Customer missing!'));

  # if oldcustomer ne customer redo form
  if (&check_name(customer)) {
    &update;
    exit;
  }

  &validate_items;

  $closedto = $form->datetonum(\%myconfig, $form->{closedto});
  $transdate = $form->datetonum(\%myconfig, $form->{transdate});
  
  $form->error($locale->text('Cannot post invoice for a closed period!')) if ($transdate <= $closedto);

  $form->isblank("exchangerate", $locale->text('Exchange rate missing!')) if ($form->{currency} ne $form->{defaultcurrency});
  
  for $i (1 .. $form->{paidaccounts}) {
    if ($form->{"paid_$i"}) {
      $datepaid = $form->datetonum(\%myconfig, $form->{"datepaid_$i"});

      $form->isblank("datepaid_$i", $locale->text('Payment date missing!'));
      
      $form->error($locale->text('Cannot post payment for a closed period!')) if ($datepaid <= $closedto);

      if ($form->{currency} ne $form->{defaultcurrency}) {
	$form->{"exchangerate_$i"} = $form->{exchangerate} if ($transdate == $datepaid);
	$form->isblank("exchangerate_$i", $locale->text('Exchange rate for payment missing!'));
      }
    }
  }

  
  $form->{label} = $locale->text('Invoice');

  if (! $form->{repost}) {
    if ($form->{id}) {
      &repost;
      exit;
    }
  }
  
  ($form->{AR}) = split /--/, $form->{AR};
  ($form->{AR_paid}) = split /--/, $form->{AR_paid};

  if (IS->post_invoice(\%myconfig, \%$form)) {
    $form->redirect($locale->text('Invoice')." $form->{invnumber} ".$locale->text('posted!'));
  } else {
    $form->error($locale->text('Cannot post invoice!'));
  }
    
}


sub print_and_post {

  $form->error($locale->text('Select postscript or PDF!')) if $form->{format} !~ /(postscript|pdf)/;
  $form->error($locale->text('Select a Printer!')) if $form->{media} eq 'screen';

  if (! $form->{repost}) {
    if ($form->{id}) {
      $form->{print_and_post} = 1;
      &repost;
      exit;
    }
  }

  $old_form = new Form;
  $form->{display_form} = "post";
  for (keys %$form) { $old_form->{$_} = $form->{$_} }
  $old_form->{rowcount}++;

  &print_form($old_form);

}


sub delete {

  $form->header;

  print qq|
<body>

<form method=post action=$form->{script}>
|;

  $form->{action} = "yes";
  $form->hide_form;

  print qq|
<h2 class=confirm>|.$locale->text('Confirm!').qq|</h2>

<h4>|.$locale->text('Are you sure you want to delete Invoice Number').qq| $form->{invnumber}
</h4>

<p>
<input name=action class=submit type=submit value="|.$locale->text('Yes').qq|">
</form>
|;


}



sub yes {

  if (IS->delete_invoice(\%myconfig, \%$form, $spool)) {
    $form->redirect($locale->text('Invoice deleted!'));
  } else {
    $form->error($locale->text('Cannot delete invoice!'));
  }

}