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import pynini
from pynini.lib import pynutil

from nemo_text_processing.text_normalization.en.graph_utils import NEMO_NOT_QUOTE, GraphFst


class MoneyFst(GraphFst):
    """
    Finite state transducer for verbalizing money, e.g.
        money {  "երկու դոլար"" } -> երկու դոլար"

    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="money", kind="verbalize", deterministic=deterministic)

        delete_tokens = self.delete_tokens(
            pynutil.delete("integer_part: \"") + pynini.closure(NEMO_NOT_QUOTE, 1) + pynutil.delete("\"")
        )
        self.fst = delete_tokens.optimize()