package Lingua::LinkParser::Sentence;
  
use strict;
use Lingua::LinkParser::Linkage;
use overload '""' => "as_string";
use vars qw($VERSION);

$VERSION = '1.16';

sub new {
  my $class = shift;
  my $text = shift || "";
  my $parser = shift;
  my $self = bless {
      _sent => Lingua::LinkParser::sentence_create($text,$parser->dict),
      _opts => $parser->opts,
      _text => $text
  };
  return unless ($self->{_sent});
  $self->{_num_linkages} = Lingua::LinkParser::sentence_parse($self->{_sent}, $self->{_opts});
  return $self;
}

sub sent { $_[0]->{_sent} }
sub opts { $_[0]->{_opts} }

sub as_string {
  my $self = shift;
  $self->{_text};
}

sub null_count {
  my $self = shift;
  return Lingua::LinkParser::sentence_null_count
      ($self->sent);
}

sub num_linkages {
  $_[0]->{_num_linkages};
}

sub num_valid_linkages {
  my $self = shift;
  return Lingua::LinkParser::sentence_num_valid_linkages
      ($self->sent);
}

sub num_linkages_post_processed {
  my $self = shift;
  return Lingua::LinkParser::sentence_num_linkages_post_processed
      ($self->sent);
}

sub num_violations {
  my $self = shift;
  my $i = shift;
  return Lingua::LinkParser::sentence_num_violations
      ($self->sent,$i);
}

sub disjunct_cost {
  my $self = shift;
  my $i = shift;
  return Lingua::LinkParser::sentence_num_linkages_post_processed
      ($self->sent,$i);
}

sub linkage {
  my $self = shift;
  my $index = shift;
  my $_linkage = new Lingua::LinkParser::Linkage($index,$self->sent,$self->opts);
  return $_linkage;
}

sub linkages {
  my $self = shift;
  my @linkages;
  my $i;
  for $i (1 .. $self->num_linkages) {
      push(@linkages, new Lingua::LinkParser::Linkage($i,$self->sent,$self->opts));
  }
  return @linkages;
}

sub get_word {
  my $self = shift;
  my $index = shift;
  return Lingua::LinkParser::sentence_get_word($self->sent,$index);
}

sub get_bigstruct {
  my $self = shift;
  my @bigstruct;
  my $i;
  my $link;
  foreach ($self->linkages) {
      $_->compute_union;
      my $sublinkage = $_->sublinkage($_->num_sublinkages - 1);
      for $i (0 .. ($sublinkage->num_words - 1)) {
          $bigstruct[$i]->{word} = $sublinkage->get_word($i);
      }
      foreach $link ($sublinkage->links) {
          $bigstruct[$link->lword]->{links}->{$link->label} = $link->rword;
          $bigstruct[$link->rword]->{links}->{$link->label} = $link->lword;
      }
  }
  return @bigstruct;
}

sub length {
  my $self = shift;
  Lingua::LinkParser::sentence_length($self->sent);
}

sub DESTROY {
my $self = shift;
Lingua::LinkParser::sentence_delete($self->{_sent});
}

1;