text: # Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  from nemo_text_processing.text_normalization.en.graph_utils import (
      NEMO_NOT_QUOTE,
      GraphFst,
      delete_preserve_order,
      delete_space,
      insert_space,
  )
  from nemo_text_processing.text_normalization.es import LOCALIZATION
  from nemo_text_processing.text_normalization.es.graph_utils import (
      add_cardinal_apocope_fem,
      shift_cardinal_gender,
      shift_number_gender,
      strip_cardinal_apocope,
  )
  
  try:
      import pynini
      from pynini.lib import pynutil
  
      PYNINI_AVAILABLE = True
  
  except (ModuleNotFoundError, ImportError):
      PYNINI_AVAILABLE = False
  
  
  class DecimalFst(GraphFst):
      """
  	Finite state transducer for classifying decimal, e.g.
  		decimal { negative: "true" integer_part: "dos"  fractional_part: "cuatro cero" quantity: "billones" } -> menos dos coma quatro cero billones
  		decimal { integer_part: "un" quantity: "billón" } -> un billón
  
      Args:
  		deterministic: if True will provide a single transduction option,
  			for False multiple transduction are generated (used for audio-based normalization)
  	"""
  
      def __init__(self, deterministic: bool = True):
          super().__init__(name="decimal", kind="classify", deterministic=deterministic)
  
          optional_sign = pynini.closure(pynini.cross("negative: \"true\"", "menos ") + delete_space, 0, 1)
          integer = pynutil.delete("integer_part: \"") + pynini.closure(NEMO_NOT_QUOTE, 1) + pynutil.delete("\"")
          fractional_default = (
              pynutil.delete("fractional_part: \"") + pynini.closure(NEMO_NOT_QUOTE, 1) + pynutil.delete("\"")
          )
  
          conjunction = pynutil.insert(" punto ") if LOCALIZATION == "am" else pynutil.insert(" coma ")
          if not deterministic:
              conjunction |= pynutil.insert(pynini.union(" con ", " y "))
              fractional_default |= strip_cardinal_apocope(fractional_default)
          fractional = conjunction + fractional_default
  
          quantity = (
              delete_space
              + insert_space
              + pynutil.delete("quantity: \"")
              + pynini.closure(NEMO_NOT_QUOTE, 1)
              + pynutil.delete("\"")
          )
          optional_quantity = pynini.closure(quantity, 0, 1)
  
          graph_masc = optional_sign + pynini.union(
              (integer + quantity), (integer + delete_space + fractional + optional_quantity)
          )
  
          # Allowing permutation for fem gender, don't include quantity since "million","billion", etc.. are masculine
          graph_fem = optional_sign + (shift_cardinal_gender(integer) + delete_space + shift_number_gender(fractional))
          if not deterministic:  # "una" will drop to "un" in certain cases
              graph_fem |= add_cardinal_apocope_fem(graph_fem)
  
          self.numbers_only_quantity = (
              optional_sign
              + pynini.union((integer + quantity), (integer + delete_space + fractional + quantity)).optimize()
          )
  
          self.graph_masc = (graph_masc + delete_preserve_order).optimize()
          self.graph_fem = (graph_fem + delete_preserve_order).optimize()
  
          graph = graph_masc | graph_fem
  
          graph += delete_preserve_order
          delete_tokens = self.delete_tokens(graph)
          self.fst = delete_tokens.optimize()
  