#======================================================================
# LX-Office ERP
# Copyright (C) 2006
# Based on SQL-Ledger Version 2.1.9
# Web http://www.lx-office.org
#
#=====================================================================
# SQL-Ledger Accounting
# Copyright (C) 1998-2002
#
#  Author: Dieter Simader
#   Email: dsimader@sql-ledger.org
#     Web: http://www.sql-ledger.org
#
#  Contributors:
#
# 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.
#======================================================================
#
# Dunning process module
#
#======================================================================

package DN;

use SL::Template;
use SL::IS;
use SL::Common;
use SL::DBUtils;
use Data::Dumper;

sub get_config {
  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form) = @_;

  # connect to database
  my $dbh = $form->dbconnect($myconfig);

  my $query =
    qq|SELECT * | .
    qq|FROM dunning_config | .
    qq|ORDER BY dunning_level|;
  $form->{DUNNING} = selectall_hashref_query($form, $dbh, $query);

  foreach my $ref (@{ $form->{DUNNING} }) {
    $ref->{fee} = $form->format_amount($myconfig, $ref->{fee}, 2);
    $ref->{interest} = $form->format_amount($myconfig, ($ref->{interest} * 100));
  }

  $dbh->disconnect();

  $main::lxdebug->leave_sub();
}

sub save_config {
  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form) = @_;

  # connect to database
  my $dbh = $form->dbconnect_noauto($myconfig);

  my ($query, @values);

  for my $i (1 .. $form->{rowcount}) {
    $form->{"fee_$i"} = $form->parse_amount($myconfig, $form->{"fee_$i"}) * 1;
    $form->{"interest_$i"} = $form->parse_amount($myconfig, $form->{"interest_$i"}) / 100;

    if (($form->{"dunning_level_$i"} ne "") &&
        ($form->{"dunning_description_$i"} ne "")) {
      @values = (conv_i($form->{"dunning_level_$i"}), $form->{"dunning_description_$i"},
                 $form->{"email_subject_$i"}, $form->{"email_body_$i"},
                 $form->{"template_$i"}, $form->{"fee_$i"}, $form->{"interest_$i"},
                 $form->{"active_$i"} ? 't' : 'f', $form->{"auto_$i"} ? 't' : 'f', $form->{"email_$i"} ? 't' : 'f',
                 $form->{"email_attachment_$i"} ? 't' : 'f', conv_i($form->{"payment_terms_$i"}), conv_i($form->{"terms_$i"}));
      if ($form->{"id_$i"}) {
        $query =
          qq|UPDATE dunning_config SET
               dunning_level = ?, dunning_description = ?,
               email_subject = ?, email_body = ?,
               template = ?, fee = ?, interest = ?,
               active = ?, auto = ?, email = ?,
               email_attachment = ?, payment_terms = ?, terms = ?
             WHERE id = ?|;
        push(@values, conv_i($form->{"id_$i"}));
      } else {
        $query =
          qq|INSERT INTO dunning_config
               (dunning_level, dunning_description, email_subject, email_body,
                template, fee, interest, active, auto, email,
                email_attachment, payment_terms, terms)
             VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)|;
      }
      do_query($form, $dbh, $query, @values);
    }

    if (($form->{"dunning_description_$i"} eq "") && ($form->{"id_$i"})) {
      $query = qq|DELETE FROM dunning_config WHERE id = ?|;
      do_query($form, $dbh, $query, $form->{"id_$i"});
    }
  }

  $dbh->commit;
  $dbh->disconnect;

  $main::lxdebug->leave_sub();
}

sub save_dunning {
  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form, $rows, $userspath, $spool, $sendmail) = @_;
  # connect to database
  my $dbh = $form->dbconnect_noauto($myconfig);

  my ($query, @values);

  my ($dunning_id) = selectrow_query($form, $dbh, qq|SELECT nextval('id')|);

  foreach my $row (@{ $rows }) {

    $form->{"interest_$row"} = $form->parse_amount($myconfig,$form->{"interest_$row"});
    $form->{"fee_$row"} = $form->parse_amount($myconfig,$form->{"fee_$row"});
    $form->{send_email} = $form->{"email_$row"};

    $query = qq|UPDATE ar SET dunning_config_id = ? WHERE id = ?|;
    @values = ($form->{"next_dunning_config_id_$row"},
               $form->{"inv_id_$row"});
    do_query($form, $dbh, $query, @values);

    $query =
      qq|INSERT INTO dunning (dunning_id, dunning_config_id, dunning_level,
                              trans_id, fee, interest, transdate, duedate)
         VALUES (?, ?, (SELECT dunning_level FROM dunning_config WHERE id = ?),
                 ?, ?, ?, current_date, ?)|;
    @values = ($dunning_id,
               conv_i($form->{"next_dunning_config_id_$row"}),
               conv_i($form->{"next_dunning_config_id_$row"}),
               conv_i($form->{"inv_id_$row"}), $form->{"fee_$row"},
               $form->{"interest_$row"},
               conv_date($form->{"next_duedate_$row"}));
    do_query($form, $dbh, $query, @values);
  }

  my $query =
    qq|SELECT invnumber, ordnumber, customer_id, amount, netamount,
         ar.transdate, ar.duedate, paid, amount - paid AS open_amount,
         template AS formname, email_subject, email_body, email_attachment,
         da.fee, da.interest, da.transdate AS dunning_date,
         da.duedate AS dunning_duedate,
         c.name, c.street, c.zipcode, c.city, c.country, c.department_1, c.department_2
       FROM ar
       LEFT JOIN dunning_config ON (dunning_config.id = ar.dunning_config_id)
       LEFT JOIN dunning da ON (ar.id = da.trans_id AND dunning_config.dunning_level = da.dunning_level)
       LEFT JOIN customer c ON (ar.customer_id = c.id)
       WHERE ar.id IN (|
       . join(", ", map("?", @{ $form->{"inv_ids"} })) . qq|)|;

  my $sth = prepare_execute_query($form, $dbh, $query, @{ $form->{"inv_ids"} });
  my $first = 1;
  while (my $ref = $sth->fetchrow_hashref(NAME_lc)) {
    if ($first) {
      map({ $form->{"dn_$_"} = []; } keys(%{$ref}));
      $first = 0;
    }
    map { $ref->{$_} = $form->format_amount($myconfig, $ref->{$_}, 2) } qw(amount netamount paid open_amount fee interest);
    map { $form->{$_} = $ref->{$_} } keys %$ref;
    #print(STDERR Dumper($ref));
    map { push(@{ $form->{"dn_$_"} }, $ref->{$_})} keys %$ref;
  }
  $sth->finish;

  IS->customer_details($myconfig,$form);
  #print(STDERR Dumper($form->{dn_invnumber}));
  $form->{templates} = "$myconfig->{templates}";



  $form->{language} = $form->get_template_language(\%myconfig);
  $form->{printer_code} = $form->get_printer_code(\%myconfig);

  if ($form->{language} ne "") {
    $form->{language} = "_" . $form->{language};
  }

  if ($form->{printer_code} ne "") {
    $form->{printer_code} = "_" . $form->{printer_code};
  }

  $form->{IN} = "$form->{formname}$form->{language}$form->{printer_code}.html";
  if ($form->{format} eq 'postscript') {
    $form->{postscript} = 1;
    $form->{IN} =~ s/html$/tex/;
  } elsif ($form->{"format"} =~ /pdf/) {
    $form->{pdf} = 1;
    if ($form->{"format"} =~ /opendocument/) {
      $form->{IN} =~ s/html$/odt/;
    } else {
      $form->{IN} =~ s/html$/tex/;
    }
  } elsif ($form->{"format"} =~ /opendocument/) {
    $form->{"opendocument"} = 1;
    $form->{"IN"} =~ s/html$/odt/;
  }

  if ($form->{"send_email"} && ($form->{email} ne "")) {
    $form->{media} = 'email';
  }

  $form->{keep_tmpfile} = 0;
  if ($form->{media} eq 'email') {
    $form->{subject} = qq|$form->{label} $form->{"${inv}number"}|
      unless $form->{subject};
    if (!$form->{email_attachment}) {
      $form->{do_not_attach} = 1;
    } else {
      $form->{do_not_attach} = 0;
    }
    $form->{subject} = parse_strings($myconfig, $form, $userspath, $form->{email_subject});
    $form->{message} = parse_strings($myconfig, $form, $userspath, $form->{email_body});

    $form->{OUT} = "$sendmail";

  } else {

    my $filename = Common::unique_id() . $form->{login} . ".pdf";
    $form->{OUT} = ">$spool/$filename";
    push(@{ $form->{DUNNING_PDFS} }, $filename);
    $form->{keep_tmpfile} = 1;
  }

  delete($form->{tmpfile});
  $form->parse_template($myconfig, $userspath);

  $dbh->commit;
  $dbh->disconnect;

  $main::lxdebug->leave_sub();
}

sub get_invoices {

  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form) = @_;

  # connect to database
  my $dbh = $form->dbconnect($myconfig);

  my $where =
    qq| WHERE (a.paid < a.amount)
          AND (a.duedate < current_date)
          AND (dnn.id =
            (SELECT id FROM dunning_config
             WHERE dunning_level >
               (SELECT
                  CASE
                    WHEN a.dunning_config_id IS NULL
                    THEN 0
                    ELSE (SELECT dunning_level
                          FROM dunning_config
                          WHERE id = a.dunning_config_id
                          ORDER BY dunning_level
                          LIMIT 1)
                  END
                FROM dunning_config LIMIT 1)
             LIMIT 1)) |;
  my @values;

  $form->{customer_id} = $1 if ($form->{customer} =~ /--(\d+)$/);

  if ($form->{customer_id}) {
    $where .= qq| AND (a.customer_id = ?)|;
    push(@values, $form->{customer_id});

  } elsif ($form->{customer}) {
    $where .= qq| AND (ct.name ILIKE ?)|;
    push(@values, '%' . $form->{customer} . '%');
  }

  my %columns = (
    "ordnumber" => "a.ordnumber",
    "invnumber" => "a.invnumber",
    "notes" => "a.notes",
    );
  foreach my $key (keys(%columns)) {
    next unless ($form->{$key});
    $where .= qq| AND $columns{$key} ILIKE ?|;
    push(@values, '%' . $form->{$key} . '%');
  }

  if ($form->{dunning_level}) {
    $where .= qq| AND a.dunning_config_id = ?|;
    push(@values, conv_i($form->{dunning_level}));
  }

  $form->{minamount} = $form->parse_amount($myconfig,$form->{minamount});
  if ($form->{minamount}) {
    $where .= qq| AND ((a.amount - a.paid) > ?) |;
    push(@values, $form->{minamount});
  }

  $paymentdate = $form->{paymentuntil} ? $dbh->quote($form->{paymentuntil}) :
    "current_date";

  $query =
    qq|SELECT a.id, a.ordnumber, a.transdate, a.invnumber, a.amount,
         ct.name AS customername, a.customer_id, a.duedate,
         da.fee AS old_fee, dnn.active, dnn.email, dnn.fee + da.fee AS fee,
         dn.dunning_description, da.transdate AS dunning_date, da.duedate AS dunning_duedate,
         a.duedate + dnn.terms - current_date AS nextlevel,
         $paymentdate - a.duedate AS pastdue, dn.dunning_level,
         current_date + dnn.payment_terms AS next_duedate,
         dnn.dunning_description AS next_dunning_description, dnn.id AS next_dunning_config_id,
         dnn.interest AS interest_rate, dnn.terms
       FROM dunning_config dnn, ar a
       JOIN customer ct ON (a.customer_id = ct.id)
       LEFT JOIN dunning_config dn ON (dn.id = a.dunning_config_id)
       LEFT JOIN dunning da ON ((da.trans_id = a.id) AND (dn.dunning_level = da.dunning_level))
       $where
       ORDER BY a.id, transdate, duedate, name|;

  my $sth = prepare_execute_query($form, $dbh, $query, @values);

  $form->{DUNNINGS} = [];

  while (my $ref = $sth->fetchrow_hashref(NAME_lc)) {
    $ref->{interest} = ($ref->{amount} * $ref->{pastdue} * $ref->{interest_rate}) / 360;
    $ref->{interest} = $form->round_amount($ref->{interest}, 2);
    map({ $ref->{$_} = $form->format_amount($myconfig, $ref->{$_}, 2)} qw(amount fee interest));
    if ($ref->{pastdue} >= $ref->{terms}) {
      push(@{ $form->{DUNNINGS} }, $ref);
    }
  }

  $sth->finish;

  $query = qq|SELECT id, dunning_description FROM dunning_config ORDER BY dunning_level|;
  $form->{DUNNING_CONFIG} = selectall_hashref_query($form, $dbh, $query);

  $dbh->disconnect;
  $main::lxdebug->leave_sub();
}

sub get_dunning {

  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form) = @_;

  # connect to database
  my $dbh = $form->dbconnect($myconfig);

  $where = qq| WHERE (da.trans_id = a.id)|;

  my @values;

  $form->{customer_id} = $1 if ($form->{customer} =~ /--(\d+)$/);

  if ($form->{customer_id}) {
    $where .= qq| AND (a.customer_id = ?)|;
    push(@values, $form->{customer_id});

  } elsif ($form->{customer}) {
    $where .= qq| AND (ct.name ILIKE ?)|;
    push(@values, '%' . $form->{customer} . '%');
  }


  my %columns = (
    "ordnumber" => "a.ordnumber",
    "invnumber" => "a.invnumber",
    "notes" => "a.notes",
    );
  foreach my $key (keys(%columns)) {
    next unless ($form->{$key});
    $where .= qq| AND $columns{$key} ILIKE ?|;
    push(@values, '%' . $form->{$key} . '%');
  }

  if ($form->{dunning_level}) {
    $where .= qq| AND a.dunning_config_id = ?|;
    push(@values, conv_i($form->{dunning_level}));
  }

  $form->{minamount} = $form->parse_amount($myconfig,$form->{minamount});
  if ($form->{minamount}) {
    $where .= qq| AND ((a.amount - a.paid) > ?) |;
    push(@values, $form->{minamount});
  }

  if (!$form->{showold}) {
    $where .= qq| AND (a.amount > a.paid) AND (da.dunning_config_id = a.dunning_config_id) |;
  }

  if ($form->{transdatefrom}) {
    $where .= qq| AND a.transdate >= ?|;
    push(@values, $form->{transdatefrom});
  }
  if ($form->{transdateto}) {
    $where .= qq| AND a.transdate <= ?|;
    push(@values, $form->{transdateto});
  }
  if ($form->{dunningfrom}) {
    $where .= qq| AND da.transdate >= ?|;
    push(@values, $form->{dunningfrom});
  }
  if ($form->{dunningto}) {
    $where .= qq| AND da.transdate >= ?|;
    push(@values, $form->{dunningto});
  }

  $query =
    qq|SELECT a.id, a.ordnumber, a.invoice, a.transdate, a.invnumber, a.amount,
         ct.name AS customername, ct.id AS customer_id, a.duedate, da.fee,
         da.interest, dn.dunning_description, da.transdate AS dunning_date,
         da.duedate AS dunning_duedate, da.dunning_id, da.dunning_config_id
       FROM ar a
       JOIN customer ct ON (a.customer_id = ct.id), dunning da
       LEFT JOIN dunning_config dn ON (da.dunning_config_id = dn.id)
       $where
       ORDER BY name, a.id|;

  $form->{DUNNINGS} = selectall_hashref_query($form, $dbh, $query, @values);

  foreach my $ref (@{ $form->{DUNNINGS} }) {
    map { $ref->{$_} = $form->format_amount($myconfig, $ref->{$_}, 2)} qw(amount fee interest);
  }

  $dbh->disconnect;
  $main::lxdebug->leave_sub();
}

sub parse_strings {

  $main::lxdebug->enter_sub();

  my ($myconfig, $form, $userspath, $string) = @_;

  my $format = $form->{format};
  $form->{format} = "html";

  $tmpstring = "parse_string.html";
  $tmpfile = "$myconfig->{templates}/$tmpstring";
  open(OUT, ">$tmpfile") or $form->error("$tmpfile : $!");
  print(OUT $string);
  close(OUT);

  my $in = $form->{IN};
  $form->{IN} = $tmpstring;
  $template = HTMLTemplate->new($tmpstring, $form, $myconfig, $userspath);

  my $fileid = time;
  $form->{tmpfile} = "$userspath/${fileid}.$tmpstring";
  $out = $form->{OUT};
  $form->{OUT} = ">$form->{tmpfile}";

  if ($form->{OUT}) {
    open(OUT, "$form->{OUT}") or $form->error("$form->{OUT} : $!");
  }
  if (!$template->parse(*OUT)) {
    $form->cleanup();
    $form->error("$form->{IN} : " . $template->get_error());
  }

  close(OUT);
  my $result = "";
  open(IN, $form->{tmpfile}) or $form->error($form->cleanup . "$form->{tmpfile} : $!");

  while (<IN>) {
    $result .= $_;
  }

  close(IN);
#   unlink($tmpfile);
#   unlink($form->{tmpfile});
  $form->{IN} = $in;
  $form->{format} = $format;

  $main::lxdebug->leave_sub();
  return $result;
}

sub melt_pdfs {

  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form, $userspath) = @_;

  foreach my $file (@{ $form->{DUNNING_PDFS} }) {
    $inputfiles .= " $userspath/$file ";
  }

  my $outputfile = "$userspath/dunning.pdf";
  system("gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=$outputfile $inputfiles");
  foreach my $file (@{ $form->{DUNNING_PDFS} }) {
    unlink("$userspath/$file");
  }
  $out = "";

  $form->{OUT} = $out;

  my $numbytes = (-s $outputfile);
  open(IN, $outputfile)
    or $form->error($self->cleanup . "$outputfile : $!");

  $form->{copies} = 1 unless $form->{media} eq 'printer';

  chdir("$self->{cwd}");

  for my $i (1 .. $form->{copies}) {
    if ($form->{OUT}) {
      open(OUT, $form->{OUT})
        or $form->error($form->cleanup . "$form->{OUT} : $!");
    } else {

      # launch application
      print qq|Content-Type: Application/PDF
Content-Disposition: attachment; filename="$outputfile"
Content-Length: $numbytes

|;

      open(OUT, ">-") or $form->error($form->cleanup . "$!: STDOUT");

    }

    while (<IN>) {
      print OUT $_;
    }

    close(OUT);

    seek(IN, 0, 0);
  }

  close(IN);
  unlink("$userspath/$outputfile");

  $main::lxdebug->leave_sub();
}

sub print_dunning {
  $main::lxdebug->enter_sub();

  my ($self, $myconfig, $form, $dunning_id, $userspath,$spool, $sendmail) = @_;
  # connect to database
  my $dbh = $form->dbconnect_noauto($myconfig);

  my $query =
    qq|SELECT invnumber, ordnumber, customer_id, amount, netamount,
         ar.transdate, ar.duedate, paid, amount - paid AS open_amount,
         template AS formname, email_subject, email_body, email_attachment,
         da.fee, da.interest, da.transdate AS dunning_date, da.duedate AS dunning_duedate
       FROM dunning da
       LEFT JOIN dunning_config ON (dunning_config.id = da.dunning_config_id)
       LEFT JOIN ar ON (ar.id = da.trans_id)
       WHERE (da.dunning_id = ?)|;

  my $sth = prepare_execute_query($form, $dbh, $query, $dunning_id);
  my $first = 1;
  while (my $ref = $sth->fetchrow_hashref(NAME_lc)) {
    if ($first) {
      map({ $form->{"dn_$_"} = []; } keys(%{$ref}));
      $first = 0;
    }
    map { $ref->{$_} = $form->format_amount($myconfig, $ref->{$_}, 2) } qw(amount netamount paid open_amount fee interest);
    map { $form->{$_} = $ref->{$_} } keys %$ref;
    map { push @{ $form->{"dn_$_"} }, $ref->{$_}} keys %$ref;
  }
  $sth->finish;

  IS->customer_details($myconfig,$form);
  $form->{templates} = "$myconfig->{templates}";

  $form->{language} = $form->get_template_language(\%myconfig);
  $form->{printer_code} = $form->get_printer_code(\%myconfig);

  if ($form->{language} ne "") {
    $form->{language} = "_" . $form->{language};
  }

  if ($form->{printer_code} ne "") {
    $form->{printer_code} = "_" . $form->{printer_code};
  }

  $form->{IN} = "$form->{formname}$form->{language}$form->{printer_code}.html";
  if ($form->{format} eq 'postscript') {
    $form->{postscript} = 1;
    $form->{IN} =~ s/html$/tex/;
  } elsif ($form->{"format"} =~ /pdf/) {
    $form->{pdf} = 1;
    if ($form->{"format"} =~ /opendocument/) {
      $form->{IN} =~ s/html$/odt/;
    } else {
      $form->{IN} =~ s/html$/tex/;
    }
  } elsif ($form->{"format"} =~ /opendocument/) {
    $form->{"opendocument"} = 1;
    $form->{"IN"} =~ s/html$/odt/;
  }

  if ($form->{"send_email"} && ($form->{email} ne "")) {
    $form->{media} = 'email';
  }

  $form->{keep_tmpfile} = 0;
  if ($form->{media} eq 'email') {
    $form->{subject} = qq|$form->{label} $form->{"${inv}number"}|
      unless $form->{subject};
    if (!$form->{email_attachment}) {
      $form->{do_not_attach} = 1;
    } else {
      $form->{do_not_attach} = 0;
    }
    $form->{subject} = parse_strings($myconfig, $form, $userspath, $form->{email_subject});
    $form->{message} = parse_strings($myconfig, $form, $userspath, $form->{email_body});

    $form->{OUT} = "$sendmail";

  } else {

    my $filename = Common::unique_id() . $form->{login} . ".pdf";

    push(@{ $form->{DUNNING_PDFS} }, $filename);
    $form->{keep_tmpfile} = 1;
  }

  $form->parse_template($myconfig, $userspath);

  $dbh->commit;
  $dbh->disconnect;

  $main::lxdebug->leave_sub();
}

1;