#!/usr/bin/perl
# -*- mode: cperl; indent-tabs-mode: nil; tab-width: 3; cperl-indent-level: 3; -*-
use strict;
use warnings;
use utf8;

BEGIN {
	$| = 1;
	binmode(STDIN, ':encoding(UTF-8)');
	binmode(STDOUT, ':encoding(UTF-8)');
}
use open qw( :encoding(UTF-8) :std );
use feature 'unicode_strings';

# Prefixes from root.lexc ca. lines 14-15
my @p = qw(AA TA);

# Main POS tags from root.lexc ca. lines 19-29
my @m = qw(N V Pali Conj Adv Interj Pron Prop Num Symbol);

# List of tags that should block Gram/TV and Gram/IV propagation
my @v_block = qw(
   NIQAR HTR NAR GUMINAR SIMA TARIAQAR
   UTE
   SAAR SAR TIP NIRAR SURE SUGE GASUGE GASURE NASUGE NASURE TSAALI TIR TITIR QQU
   );

my $pp = join('|', @p);
my $mp = join('|', @m);
my $vb = join('|', @v_block);

sub propagate_tags {
   my ($c) = @_;

   if ($c !~ m@^\s+"@ || $c !~ m@Gram/[TI]V@) {
      return $c;
   }

   # Snip duplicate tags
   my $o = $c;
   do {
      $o = $c;
      $c =~ s@ (Gram/[HTI]V) \1@ $1@g;
      $c =~ s@ (Gram/[HTI]V) (Der/[nv][nv]) \1@ $2 $1@g;
   } while ($o ne $c);

   my @ts = split(/ (?=(?:(?:i?(?:$mp))|(?:\p{Lu}[_\p{Lu}]+)|U)(?: |$))/, $c);

   my $gram = '';
   foreach (@ts) {
      # Stop entirely at hybrid marker, to avoid mangling 2nd part of a hybrid
      if (m@ Gram/Hyb@) {
         last;
      }
      # Don't propagate past POS, blocking morphemes, Pass/Refl, or noun morphemes
      if (m/^(?:$mp)(?: |$)/ || m/^(?:$vb)(?: |$)/ || m@ Gram/(Pass|Refl)@ || m@ Der/[nv]n@) {
         $gram = '';
         next;
      }
      if (m@ (Gram/[TI]V)@) {
         $gram = $1;
      }
      elsif ($gram && m@ Der/[nv]v@) {
         $_ .= " $gram";
      }
   }

   return join(' ', @ts);
}

while (<STDIN>) {
   chomp;

   # Move prefixes after the base form
   $_ =~ s@^(\s+)($pp) (".+?" )@$1$3Prefix/$2 @mg;

   $_ = propagate_tags($_);

   print "$_\n";
}