# Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#     http://www.apache.org/licenses/LICENSE-2.0
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from nemo_text_processing.inverse_text_normalization.sv.verbalizers.cardinal import CardinalFst
from nemo_text_processing.inverse_text_normalization.sv.verbalizers.date import DateFst
from nemo_text_processing.inverse_text_normalization.sv.verbalizers.decimal import DecimalFst
from nemo_text_processing.inverse_text_normalization.sv.verbalizers.time import TimeFst
from nemo_text_processing.text_normalization.en.graph_utils import GraphFst
from nemo_text_processing.text_normalization.sv.verbalizers.cardinal import CardinalFst as TNCardinalVerbalizer


class VerbalizeFst(GraphFst):
    """
    Composes other verbalizer grammars.
    For deployment, this grammar will be compiled and exported to OpenFst Finite State Archive (FAR) File.
    More details to deployment at NeMo/tools/text_processing_deployment.
    """

    def __init__(self, deterministic: bool = True):
        super().__init__(name="verbalize", kind="verbalize", deterministic=deterministic)
        tn_cardinal_verbalizer = TNCardinalVerbalizer(deterministic=False)

        cardinal = CardinalFst(tn_cardinal_verbalizer=tn_cardinal_verbalizer)
        cardinal_graph = cardinal.fst
        date_graph = DateFst().fst
        decimal = DecimalFst()
        decimal_graph = decimal.fst
        time_graph = TimeFst().fst
        graph = time_graph | decimal_graph | cardinal_graph | date_graph
        self.fst = graph