#!/bin/bash

# This script normalizes the punctuations and strips the extra spaces in the input text
# Directly sourced from https://github.com/pluiez/NLLB-inference


set -euo pipefail

root=$(dirname $0)

lang_map_path=$root/utils.map_token_lang.tsv

usage () {
    echo "usage: $0 lang" >&2
    exit 1
}

[ $# -eq 1 ] || usage

lang=$1

declare -A lang_map

while read line; do
    key=$(cut -f1 <<< "$line")
    val=$(cut -f2 <<< "$line")
    lang_map[$key]=$val
done < $lang_map_path

if [ -v "lang_map[$lang]" ]; then
    lang=${lang_map[$lang]}
elif [ -v "lang_map[${lang:0:3}]" ]; then
    lang=${lang_map[${lang:0:3}]}
else
    echo "undefined mapping: ${lang}, falling back to: en" >&2
    lang=en
fi

perl $root/normalize-punctuation.perl $lang