import os
import pathlib
import base64
import yaml

_storagepath = pathlib.Path(__file__).parents[1] / ".temp"
_file = _storagepath / "storage.yaml"

_storagepath.mkdir(exist_ok=True, parents=True)

def fileexists():
    """
    Checks if storage file does exist, creates it when necessary
    """
    if not _file.exists():
        with open(_file, 'a', encoding="utf-8"):
            os.utime(_file, None)

def put(key: str, value: str, encoded=False):
    """
    Puts a given value with a given key into the storage file
    Encodes the data as base64 when encoded is set to true
    """
    fileexists()
    with open(_file, "r+", encoding="utf-8") as file:
        content: dict[str, str] = yaml.load(file, Loader=yaml.SafeLoader) or {}
        content.update({ key: str(base64.b64encode(value.encode())) if encoded else value })
    with open(_file, "w+", encoding="utf-8") as file:
        yaml.dump(content, file, Dumper=yaml.SafeDumper)

def remove(key: str):
    """
    Removed a given key from the storage file
    """
    fileexists()
    with open(_file, "r", encoding="utf-8") as file:
        content: dict[str, str] = yaml.load(file, Loader=yaml.SafeLoader) or {}
        content.pop(key, None)
    with open(_file, "w+", encoding="utf-8") as file:
        yaml.dump(content, file, Dumper=yaml.SafeDumper)

def get(key: str, encoded=False):
    """
    Retrieves a value for a given key from the storage file
    If the value was encoded, encoded needs to be set True to decode it again
    """
    value: str | None = None
    if not _file.exists():
        return None
    with open(_file, "r", encoding="utf-8") as file:
        content: dict[str, str] = yaml.load(file, Loader=yaml.SafeLoader)
        value = content.get(key, None)
    if value is None:
        return None
    return base64.b64decode(value).decode() if encoded else value

def clear():
    """
    Deletes the storage file
    """
    _file.unlink()