import json
from pathlib import Path
from ..Errors import OutOfDictionaryException


def nanos_vocabulary2json_str(vocabulary: dict[tuple[int, int], int]) -> str:

    JSON: dict[str, int] = {}

    for key, item in vocabulary.items():
        TUPLE_STR = f"{key}"
        JSON[TUPLE_STR] = item

    return json.dumps(JSON)


def nanos_json_str2vocabulary(json_string: str) -> dict[tuple[int, int], int]:

    JSON: dict[str, int] = json.loads(json_string)
    VOCABULARY: dict[tuple[int, int], int] = {}

    for key, item in JSON.items():
        REDUCED_KEY = len(key) - 1
        KEY_STR = key[1:REDUCED_KEY]
        VOC_KEY = tuple(map(int, KEY_STR.split(",")))

        if len(VOC_KEY) != 2:
            raise OutOfDictionaryException()

        # Checked for weird things above
        VOCABULARY[VOC_KEY] = item  # type: ignore

    return VOCABULARY


def save_nanos_vocabulary(vocabulary: dict[tuple[int, int], int], path: Path):

    json_string = nanos_vocabulary2json_str(vocabulary)
    FILE = open(path, "w")
    FILE.write(json_string)
    FILE.close()


def load_nanos_vocabulary(path: Path) -> dict[tuple[int, int], int]:
    FILE = open(path, "r")
    json_string = FILE.read()
    FILE.close()

    return nanos_json_str2vocabulary(json_string)