#=====================================================================
# SQL-Ledger Accounting
# Copyright (C) 2003
#
#  Author: Dieter Simader
#   Email: dsimader@sql-ledger.org
#     Web: http://www.sql-ledger.org
#
#  Contributors: Mario R. Pizzolanti <mario@zavood.ee>
#
# 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.
#======================================================================
#
# written for check and receipt printing
# it returns a properly formatted text string
# for a number up to 10**9

sub init {
  my $self = shift;

  %{ $self->{numbername} } =
                   (0 => 'null',
                    1 => 'üks',
                    2 => 'kaks',
	            3 => 'kolm',
		    4 => 'neli',
		    5 => 'viis',
		    6 => 'kuus',
		    7 => 'seitse',
		    8 => 'kaheksa',
		    9 => 'üheksa',
		   10 => 'kümme',
                10**2 => 'sada',
                10**3 => 'tuhat',
		10**6 => 'miljon',
		10**9 => 'miljard',
	       10**12 => 'biljon'
		);

}


sub num2text {
  my ($self, $amount) = @_;

  return $self->{numbername}{0} unless $amount;

  my @textnumber = ();

  # split amount into chunks of 3
  my @num = reverse split //, abs($amount);
  my @numblock = ();
  my ($i, $appendit);
  my @a = ();

  while (@num) {
    @a = ();
    for (1 .. 3) {
      push @a, shift @num;
    }
    push @numblock, join / /, reverse @a;
  }
  
  while (@numblock) {

    $i = $#numblock;
    @num = split //, $numblock[$i];
    
    $numblock[$i] *= 1;

    $appendit = "it";
    
    if ($numblock[$i] == 0) {
      pop @numblock;
      next;
    }
   
    if ($numblock[$i] > 99) {
      # the one from hundreds
      push @textnumber, "$self->{numbername}{$num[0]}$self->{numbername}{10**2}";
     
      # reduce numblock
      $numblock[$i] -= $num[0] * 100;
    }
    
    if ($numblock[$i] > 19) {
      # 20 - 99
      push @textnumber, "$self->{numbername}{$num[1]}kümmend";
      @num = split //, $numblock[$i];
      push @textnumber, $self->{numbername}{$num[1]} if $num[1] > 0;
      
    } elsif ($numblock[$i] > 10) {
      # 11 - 19
      push @textnumber, "$self->{numbername}{$num[1]}teist";
      
    } elsif ($numblock[$i] > 1) {
      # ones
      push @textnumber, $self->{numbername}{$numblock[$i]};
      
    } elsif ($numblock[$i] == 1) {
      push @textnumber, $self->{numbername}{$num[0]};
      $appendit = "";
      
    }
    
    # add thousand, million
    if ($i) {
      $amount = 10**($i * 3);
      $appendit = ($i == 1) ? "" : $appendit;
      push @textnumber, "$self->{numbername}{$amount}$appendit";
    }
    
    pop @numblock;
    
  }

  join ' ', @textnumber;

}


1;