package jspell::dict;

use 5.006;
use strict;
use warnings;
use Data::Dumper;

use jspell;

require Exporter;

our @ISA = qw(Exporter);

our %EXPORT_TAGS = ( 'all' => [ qw() ] );

our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );

our @EXPORT = qw();

our $VERSION = '0.01';

# Preloaded methods go here.

sub init{
  my $file = shift;
  my $self = { filename => $file };
  open F, $file or die "Cannot open file '$file': $!\n";
  while(<F>) {
    $self->{shortcut}{$1} = $2 if (m!^#([^/]+)/([^/]+)/!);
  }
  close F;

  return bless($self);
}

sub foreach_word {
  my $dic = shift;
  my $func = shift;
  open DIC, $dic->{filename} or die("cannot open file");
  while(<DIC>) {
    next if m!^#!;
    next if m!^/s*$!;

    my ($word,$class,$flags) = split '/', $_;
    $class =~ s/#([A-Za-z][A-Za-z0-9]*)/$dic->{shortcut}{$1} || ""/ge if $class;
    my @flags = ($flags)?split(//, $flags):();
    my @atts = ($class)?split(/[,=]/, $class):();
    my %atts;
    if (@atts % 2) {
      %atts = ();
    } else {
      %atts = @atts;
    }

    &{$func}($word,\%atts,\@flags);
  }
  close DIC;
}

sub for_this_cat_I_want_only_these_flags {
  my $dic = shift;
  my $cat = shift;
  $cat =~ s/#//g;
  my $flags = shift;
  my %flags;
  @flags{split //,$flags}=1;

  foreach_word($dic, sub {
		 my ($w,$a,$f) = @_;
		 my %fs = %flags;
		 my $ct = $cat;

		 my $this_cat = $a->{CAT} || "unknown";
		 if ($this_cat eq $ct) {
		   my $fl;
		   for $fl(@$f) {
		     unless (exists($fs{$fl})) {
		       print "$w from category '$cat' uses flag '$fl'\n";
		     }
		   }
		 }
	       });
}

sub for_this_cat_I_dont_want_these_flags {
  my $dic = shift;
  my $cat = shift;
  $cat =~ s/#//g;
  my $flags = shift;
  my %flags;
  @flags{split //,$flags}=1;

  foreach_word($dic, sub {
		 my ($w,$a,$f) = @_;
		 my %fs = %flags;
		 my $ct = $cat;

		 my $this_cat = $a->{CAT} || "unknown";
		 if ($this_cat eq $ct) {
		   my $fl;
		   for $fl(@$f) {
		     if (exists($fs{$fl})) {
		       print "$w from category '$cat' uses flag '$fl'\n";
		     }
		   }
		 }
	       });
}


sub not_categorized {
    my $dic = shift;

    open DIC, $dic->{filename} or die("Cannot open file");
    while(<DIC>) {
	chomp;
	next if /^#/;
	next if /^\s*$/;

	m{^([^/]+)/};
	my $word = $1;
	my $cat = $';
	next unless ($cat =~ m!^/!);
	print "word '$word' doesn't have a categorie\n";
    }
    close DIC;
}

sub extra_words {
  my $dic = shift;

  my %from;
  my ($r,$word,$fea,$fea1,$t);
  jspell_dict("port");


  open DIC, $dic->{filename} or die("Cannot open file");
  while(<DIC>) {
    chomp;
    next if /^#/;
    next if /^\s*$/;

    m{^([^/]+)/};
    $word = $1;
    my @rads = rad($word);
    if (@rads > 1) {
      print STDERR "." if rand > 0.99;
      for $r (@rads) {
	next if ($r eq $word);

	# for the fea from $word, get the rad==$r
	for $fea (fea($word)) {
	  if ($fea->{rad} eq $word) {
	    for $fea1 (fea($r)) {
	      if (same_cat($fea1->{CAT},$fea->{CAT})) {
		$from{$r} = {word=>$word, orig=>$fea1, dest=>$fea};
	      }
	    }
	  }
	}

	# $from{$r} = {word=>$word};
      }
    }
  }
  close DIC;

  for (keys %from) {
    if ($from{$from{$_}{word}}{word}) {
      print "# warning: multiple dependence\n";
      print "# \t$_ => $from{$_}{word} => $from{$from{$_}{word}}{word}\n";
      delete($from{$_});
    } else {
      print "# from $_ you can get $from{$_}{word}\n";
      print "delete_word('$from{$_}{word}')\n";
    }
  }
}

sub same_cat {
  my ($a,$b) = @_;
  if (defined($a) && defined($b)) {
    return ($a eq $b);
  } else {
    return 0;
  }
}

# Each element should be a reference to an associative array like this:
#
# { word => 'word', flags => 'zbr', CAT => 'np', G=>'f' }
sub add_words {
	my $dict = shift;
	$dict->add_full_line(map {
				my $word = $_->{word};
				my $flags = $_->{flags};
				delete($_->{word});
				delete($_->{flags});
				my %hash = %$_;
				my $info = join(",",map {"$_=$hash{$_}"} keys %hash);
				"$word/$info/$flags"
				 } @_);
}

sub add_full_line {
	my $dict = shift;
	my @p = map {"$_\n"} @_;
	my @v;

	open DIC, $dict->{filename} or die("cannot open dictionary file");
	open NDIC, ">$dict->{filename}.new" or die("cannot open new dictionary file");
	while (<DIC>) {
		push @v,$_ and next if (/^#/);
		push @p,$_;
	}
	
	print NDIC join "", @v;
	print NDIC "\n\n";
	print NDIC sort grep /./, @p;
	close DIC;
	close NDIC;
}

sub delete_word {
	my $dict = shift;
	my $pal=shift;
	my $t;

	open DIC, $dict->{filename} or die("cannot open dictionary file");
	open NDIC, ">$dict->{filename}.new" or die("cannot open new dictionary file");

	while (<DIC>) {
		$t = $1 if /^(.+?)\//;
		print NDIC unless ($t=~/^$pal$/);
	}
	close DIC;
	close NDIC;
}

sub add_flag {
	my $dic = shift;
	my $flag = shift;
	my %words;
	@words{@_} = 1;
	
  	$dic -> foreach_word( sub {
		 my ($w,$a,$f) = @_;
		 my %fs;
		 @fs{@$f}=1; 
		 if ($words{$w}) {
			@fs{split //, $flag}=1;;
			print data2line($w,$a,join("",keys %fs));
		 }
		 print data2line($w,$a,$f);
		
				});

}
#$pal=shift;
#($ac,$flag)=(shift=~/([\+\-])(.)/);
#
#while (<>) {
	#print $_ and next if ($_=~/^#/ || $_ eq "\n");
	#$_=~s#\n#/\n# unless ($_=~/.*\/.*\/.*\//);
	#($a,$b,$c,$d)=($_=~/^(.+?)\/(.*?)\/(.*?)\/(.*)/);
	#$c=~s#$flag##g if ($a=~/^$pal$/);
	#$c.=$flag if ($a=~/^$pal$/ && $ac eq "+");
	#print "$a/$b/$c/$d\n";
#}

sub data2line {
  my ($word,$atts,$flags) = @_;
  return "$word/".join(",",map { "$_=$atts->{$_}" } keys %$atts)."/".join("",grep {/./} @$flags)."/";
}

1;
__END__

=head1 NAME

jspell::dict - a perl module for processing jspell dictionaries

=head1 SYNOPSIS

 use jspell::dict;

 $dict = init("dictionary file");

 $dict->foreach_word( \&func );

 $dict->for_this_cat_I_want_only_these_flags('nc', 'fp');

 $dict->add_flag("p","linha","carro",...);

 $dict->add_word({word=>'word',flags=>'zbr',CAT=>'np',G=>'f'},...)

 remflag("f.dic","p","linha","carro",...);

=head1 DESCRIPTION

=head2 C<init>

This function returns a new dictionary object to be used in future
methods. It requires a string with the dictionary file name.

=head2 C<foreach_word>

This method processes all words from the dictionary using the function
passed as argument. This function is called with three arguments: the
word, a reference to an associative array with the category
information and a reference to a list of rules identifiers.

=head2 C<for_this_cat_I_want_only_these_flags>

This method receives a gramatical category and a string with flags. It
will print warning messages for each entry with that category and with
a flag not described in the flags string.

=head2 C<for_this_cat_I_dont_want_these_flags>

Works like the previous method, but will print warnings if any
category uses one of the specificed flags.

=head2 C<not_categorized>

This method returns a report for the entries without a category
definition.

=head2 C<extra_words>

This method tries to find redundant entries on the dictionary,
producing an ouput file to be executed and delete the redundancy.

=head2 C<add_words>

 $dict->add_word({word=>'word',flags=>'zbr',CAT=>'np',G=>'f'},...)

=head2 C<delete_word>

Deletes the word passed as argument.

=head2 C<add_flag>

Adds the flags in the first argument to all words passed.

=head1 AUTHOR

 Alberto Simoes, albie@alfarrabio.di.uminho.pt

 J.Joao Almeida jj@di.uminho.pt

=head1 SEE ALSO

 perl(1).
 jspell(1)

=head1 BUGS

=cut