#=====================================================================
# SQL-Ledger Accounting
# Copyright (C) 2002
#
#  Author: Dieter Simader
#     Web: http://www.sql-ledger.org
#
#  Language: Spanish
#  Contributors: John Christian Stoddart
#                Dirk Enrique Seiffert
#
# 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.
#======================================================================


sub init {
  my $self = shift;

  %{ $self->{numbername} } =
                   (0 => 'cero',
                    1 => 'un',
		 '1o' => 'uno',
                    2 => 'dos',
	            3 => 'tres',
		    4 => 'cuatro',
		    5 => 'cinco',
		    6 => 'seis',
		    7 => 'siete',
		    8 => 'ocho',
		    9 => 'nueve',
		   10 => 'diez',
		   11 => 'once',
		'11o' => 'once',
		   12 => 'doce',
		   13 => 'trece',
		   14 => 'catorce',
		   15 => 'quince',
		   16 => 'dieciséis',
		   17 => 'diecisiete',
		   18 => 'dieciocho',
		   19 => 'diecinueve',
		   20 => 'veinte',
		   21 => 'veintiún',
	        '21o' => 'veintiuno',
		   22 => 'veintidós',
		   23 => 'veintitrés',
		   24 => 'veinticuatro',
		   25 => 'veinticinco',
		   26 => 'veintiséis',
		   27 => 'veintisiete',
		   28 => 'veintiocho',
		   29 => 'veintinueve',
		   30 => 'treinta',
		   40 => 'cuarenta',
		   50 => 'cincuenta',
		   60 => 'sesenta',
		   70 => 'setenta',
		   80 => 'ochenta',
		   90 => 'noventa',
		  500 => 'quinientos',
		  700 => 'setecientos',
		  900 => 'novecientos',
                10**2 => 'cien',
                10**3 => 'mil',
		10**6 => 'millón',
	       10**12 => 'billón',
		);

}


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 @a = ();
  my $i;


  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;

    if ($numblock[$i] == 0) {
      pop @numblock;
      next;
    }
    
    if ($numblock[$i] > 99) {
      if ($num[0] == 1) {
        if ($numblock[$i] > 100) {
	  push @textnumber, $self->{numbername}{10**2}."to";
	} else {
	  push @textnumber, $self->{numbername}{10**2};
	}
      } else {
        # special case for 500, 700, 900
	if (grep /$num[0]/, (5,7,9)) {
	  push @textnumber, $self->{numbername}{"${num[0]}00"};
	  
	} else {
	
	  # the one from hundreds, append cientos
	  push @textnumber, $self->{numbername}{$num[0]}.$self->{numbername}{10**2}.'tos';
	}
      }
     
      # reduce numblock
      $numblock[$i] -= $num[0] * 100;
    }
    
    if ($numblock[$i] > 9) {
      # tens
      push @textnumber, $self->format_ten($numblock[$i], $i);
    } elsif ($numblock[$i] > 0) {
      # ones
      $num = $numblock[$i];
      $num .= 'o' if ($num == 1 && $i == 0);
      push @textnumber, $self->{numbername}{$num};
    }
    
    # add thousand, million
    if ($i) {
      $num = 10**($i * 3);
      if ($numblock[$i] > 1) {
	if ($i == 2 || $i == 4) {
	  $a = $self->{numbername}{$num}."es";
	  $a =~ s/ó/o/;
	  push @textnumber, $a;
	} elsif ($i == 3) {
	  $num = 10**($i * 2);
	  $a = "$self->{numbername}{10**3} $self->{numbername}{$num}es";
	  $a =~ s/ó/o/;
	  push @textnumber, $a;
	} else {
	  if ($i == 1) {
	    push @textnumber, $self->{numbername}{$num};
	  } else {
	    push @textnumber, "$self->{numbername}{$num}s";
	  }
	}
      } else {
        if ($i > 2) {
	  shift @textnumber;
	  push @textnumber, $self->{numbername}{10**3};
	} else {
	  $a = "$self->{numbername}{$num}es";
	  $a =~ s/ó/o/;
	  push @textnumber, $a;
	}
      }
    }
      
    pop @numblock;
    
  }

  join ' ', @textnumber;

}


sub format_ten {
  my ($self, $amount, $i) = @_;
  
  my $textnumber = "";
  my @num = split //, $amount;

  if ($amount > 30) {
    $textnumber = $self->{numbername}{$num[0]*10};
    $amount = $num[1];
  } else {
    $amount .= 'o' if ($num[1] == 1 && $i == 0);
    $textnumber = $self->{numbername}{$amount};
    $amount = 0;
  }

  $textnumber .= " y ".$self->{numbername}{$amount} if $amount;

  $textnumber;
  
}


1;

