#!/bin/bash

# Copyright 2010-2012 Microsoft Corporation  
#           2012-2014 Johns Hopkins University (Author: Daniel Povey)
#                2015 Guoguo Chen
#                2016 Vimal Manohar
# Apache 2.0

# Call this script from one level above, e.g. from the s3/ directory.  It puts
# its output in data/local/.

# The parts of the output of this that will be needed are
# [in data/local/dict/ ]
# lexicon.txt
# extra_questions.txt
# nonsilence_phones.txt
# optional_silence.txt
# silence_phones.txt

. ./path.sh
. ./cmd.sh

set -e 
set -o pipefail
set -u

# run this from ../
dict_suffix=
stage=-1

echo "$0 $@"  # Print the command line for logging
. utils/parse_options.sh || exit 1;

if [ $# -ne 1 ]; then
  echo "Usage: $0 <wordlist>"
  echo "e.g. : $0 data/local/local_lm/data/work/wordlist"
  exit 1
fi

wordlist=$1

dir=data/local/dict${dict_suffix}
mkdir -p $dir

if [ ! -d $dir/cmudict ]; then
  # (1) Get the CMU dictionary
  svn co  https://svn.code.sf.net/p/cmusphinx/code/trunk/cmudict \
    $dir/cmudict || exit 1;
fi

# can add -r 10966 for strict compatibility.


#(2) Dictionary preparation:


if [ $stage -le 0 ]; then
  # Make phones symbol-table (adding in silence and verbal and non-verbal noises at this point).
  # We are adding suffixes _B, _E, _S for beginning, ending, and singleton phones.

  # silence phones, one per line.
  (echo SIL; echo SPN; echo NSN; echo UNK;) > $dir/silence_phones.txt
  echo SIL > $dir/optional_silence.txt

  # nonsilence phones; on each line is a list of phones that correspond
  # really to the same base phone.
  cat $dir/cmudict/cmudict.0.7a.symbols | perl -ane 's:\r::; print;' | \
    perl -e 'while(<>){
  chop; m:^([^\d]+)(\d*)$: || die "Bad phone $_"; 
  $phones_of{$1} .= "$_ "; }
  foreach $list (values %phones_of) {print $list . "\n"; } ' \
    > $dir/nonsilence_phones.txt || exit 1;

  # A few extra questions that will be added to those obtained by automatically clustering
  # the "real" phones.  These ask about stress; there's also one for silence.
  cat $dir/silence_phones.txt| awk '{printf("%s ", $1);} END{printf "\n";}' > $dir/extra_questions.txt || exit 1;
  cat $dir/nonsilence_phones.txt | perl -e 'while(<>){ foreach $p (split(" ", $_)) {
  $p =~ m:^([^\d]+)(\d*)$: || die "Bad phone $_"; $q{$2} .= "$p "; } } foreach $l (values %q) {print "$l\n";}' \
    >> $dir/extra_questions.txt || exit 1;

  grep -v ';;;' $dir/cmudict/cmudict.0.7a | \
    perl -ane 'if(!m:^;;;:){ s:(\S+)\(\d+\) :$1 :; print; }' \
    > $dir/dict.cmu || exit 1;

  # Add to cmudict the silences, noises etc.

  (echo '!SIL SIL'; echo '<SPOKEN_NOISE> SPN'; echo '<unk> UNK'; echo '<NOISE> NSN'; ) | \
    cat - $dir/dict.cmu > $dir/lexicon2_raw.txt 
  awk '{print $1}' $dir/lexicon2_raw.txt > $dir/orig_wordlist

  cat <<EOF >$dir/silence_phones.txt 
SIL
SPN
NSN
UNK
EOF

fi


if [ $stage -le 2 ]; then
  if [ ! -f exp/g2p/.done ]; then
    steps/dict/train_g2p.sh --cmd "$train_cmd" \
      --silence-phones $dir/silence_phones.txt \
      $dir/dict.cmu exp/g2p
    touch exp/g2p/.done
  fi
fi

export PATH=$PATH:`pwd`/local/dict

if [ $stage -le 3 ]; then
  cat $wordlist | python -c '
import sys

words = {}
for line in open(sys.argv[1]).readlines():
  words[line.strip()] = 1

oovs = {}
for line in sys.stdin.readlines():
  word = line.strip()
  if word not in words:
    oovs[word] = 1

for oov in oovs:
  print (oov)' $dir/orig_wordlist | sort -u > $dir/oovlist
  
  cat $dir/oovlist | \
    get_acronym_prons.pl $dir/lexicon2_raw.txt > $dir/dict.acronyms
fi

mkdir -p $dir/f $dir/b # forward, backward directions of rules...

if [ $stage -le 4 ]; then
  # forward is normal suffix
  # rules, backward is reversed (prefix rules).  These
  # dirs contain stuff we create while making the rule-based
  # extensions to the dictionary.

  # Remove ; and , from words, if they are present; these
  # might crash our scripts, as they are used as separators there.
  filter_dict.pl $dir/dict.cmu > $dir/f/dict
  cat $dir/oovlist | filter_dict.pl > $dir/f/oovs
  reverse_dict.pl $dir/f/dict > $dir/b/dict
  reverse_dict.pl $dir/f/oovs > $dir/b/oovs
fi

if [ $stage -le 5 ]; then
  # The next stage takes a few minutes.
  # Note: the forward stage takes longer, as English is
  # mostly a suffix-based language, and there are more rules
  # that it finds.
  for d in $dir/f $dir/b; do
   (
     cd $d
     cat dict | get_rules.pl 2>get_rules.log >rules
     get_rule_hierarchy.pl rules >hierarchy
     awk '{print $1}' dict | get_candidate_prons.pl rules dict | \
       limit_candidate_prons.pl hierarchy | \
       score_prons.pl dict | \
       count_rules.pl >rule.counts
     # the sort command below is just for convenience of reading.
     score_rules.pl <rule.counts | sort -t';' -k3,3 -n -r >rules.with_scores
     get_candidate_prons.pl rules.with_scores dict oovs | \
       limit_candidate_prons.pl hierarchy > oovs.candidates
   ) &
  done
  wait
fi

if [ $stage -le 6 ]; then
  # Merge the candidates.
  reverse_candidates.pl $dir/b/oovs.candidates | cat - $dir/f/oovs.candidates | sort > $dir/oovs.candidates
  select_candidate_prons.pl <$dir/oovs.candidates | awk -F';' '{printf("%s  %s\n", $1, $2);}' \
    > $dir/dict.oovs

  cat $dir/dict.acronyms $dir/dict.oovs | sort | uniq > $dir/dict.oovs_merged
  awk '{print $1}' $dir/dict.oovs_merged | uniq > $dir/oovlist.handled
  sort $dir/oovlist | { diff - $dir/oovlist.handled || true; } | grep -v 'd' | sed 's:< ::' > $dir/oovlist.not_handled
fi

if [ $stage -le 7 ]; then
  steps/dict/apply_g2p.sh --cmd "$train_cmd" \
    $dir/oovlist.not_handled exp/g2p exp/g2p/oov_lex
  cat exp/g2p/oov_lex/lexicon.lex | cut -f 1,3 | awk '{if (NF > 1) print $0}' > \
    $dir/dict.oovs_g2p
fi

if [ $stage -le 8 ]; then
  # the sort | uniq is to remove a duplicated pron from cmudict.
  cat $dir/lexicon2_raw.txt $dir/dict.oovs_merged $dir/dict.oovs_g2p | sort | uniq > \
    $dir/lexicon.txt || exit 1;
  # lexicon.txt is without the _B, _E, _S, _I markers.

  rm $dir/lexiconp.txt 2>/dev/null || true
fi

echo "Dictionary preparation succeeded"