from pathlib import Path

from ..Classes import NanoSocratesSplitter
from ..Classes import NanoSocratesBPE
from ..Classes import NanoSocratesSpecial

from ..Utils import special_regex_maker
from ..Enums import TokenType
from ..Enums import SpecialToken


class TokeNanoCore:
    def __init__(
        self,
        bpe_vocabulary: dict[tuple[int, int], int],
        special_token_list: list[str],
        # special_vocabulary: dict[str, int]
    ):

        self.__bpe_encoder = NanoSocratesBPE(bpe_vocabulary)

        SPECIAL_REGEX = special_regex_maker(special_token_list)
        BPE_VOCABULARY_SIZE = self.__bpe_encoder.vocabulary_size

        self.__splitter = NanoSocratesSplitter(SPECIAL_REGEX, BPE_VOCABULARY_SIZE)
        self.__special_encoder = NanoSocratesSpecial(
            BPE_VOCABULARY_SIZE, special_token_list
        )

    @property
    def vocabulary_size(self):
        BPE_VOC_SIZE = self.__bpe_encoder.vocabulary_size
        SPECIAL_VOC_SIZE = self.__special_encoder.vocabulary_size
        return BPE_VOC_SIZE + SPECIAL_VOC_SIZE + 1

    def encode(self, corpus: str) -> list[int]:
        output: list[int] = []
        for piece, token_type in self.__splitter.split_text(corpus):

            if token_type == TokenType.SPECIAL:
                output.extend(self.__special_encoder.encode(piece))

            # slow but clear
            if token_type == TokenType.BPE:
                output.extend(self.__bpe_encoder.encode(piece))

        return output
    


    def encode_incomplete_string(self, corpus: str) -> list[int]:
        """
        Encode string which don't end with a special token
        """
        corpus = corpus + SpecialToken.CORPUS_END.value
        output: list[int] = []
        for piece, token_type in self.__splitter.split_text(corpus):

            if token_type == TokenType.SPECIAL:
                output.extend(self.__special_encoder.encode(piece))

            # slow but clear
            if token_type == TokenType.BPE:
                output.extend(self.__bpe_encoder.encode(piece))

        return output[:-1]



    def decode(self, corpus: list[int]) -> str:
        output_str = ""
        for token, token_type in self.__splitter.split_tokens(corpus):
            # token is an integer if special, a list of integer otherwise
            if token_type == TokenType.SPECIAL:
                output_str += self.__special_encoder.decode(
                    token
                )  # it accept an integer

            # slow but clear
            if token_type == TokenType.BPE:
                output_str += self.__bpe_encoder.decode(
                    token
                )  # it accept a list of integer
        return output_str