import copy
import os
from pathlib import Path

from typing import Dict, Union

from runhouse.resources.blobs.file import File
from runhouse.resources.secrets.provider_secrets.provider_secret import ProviderSecret
from runhouse.resources.secrets.utils import _check_file_for_mismatches


class HuggingFaceSecret(ProviderSecret):
    """
    .. note::
            To create a HuggingFaceSecret, please use the factory method :func:`provider_secret` with
            ``provider="huggingface"``.
    """

    # values format: {"token": hf_token}
    _PROVIDER = "huggingface"
    _DEFAULT_CREDENTIALS_PATH = "~/.cache/huggingface/token"
    _DEFAULT_ENV_VARS = {"token": "HF_TOKEN"}

    @staticmethod
    def from_config(config: dict, dryrun: bool = False):
        return HuggingFaceSecret(**config, dryrun=dryrun)

    def _write_to_file(
        self, path: Union[str, File], values: Dict = None, overwrite: bool = False
    ):
        new_secret = copy.deepcopy(self)
        if not _check_file_for_mismatches(
            path, self._from_path(path), values, overwrite
        ):
            token = values["token"]
            if isinstance(path, File):
                path.write(token, serialize=False, mode="w")
            else:
                full_path = os.path.expanduser(path)
                Path(full_path).parent.mkdir(parents=True, exist_ok=True)
                with open(full_path, "a") as f:
                    f.write(token)
                new_secret._add_to_rh_config(path)

        new_secret._values = None
        new_secret.path = path
        return new_secret

    def _from_path(self, path: Union[str, File]):
        token = None
        if isinstance(path, File):
            if path.exists_in_system():
                token = path.fetch(mode="r", deserialize=False).strip("\n")
        elif path and os.path.exists(os.path.expanduser(path)):
            token = Path(os.path.expanduser(path)).read_text().strip("\n")
        if token:
            return {"token": token}
        return {}
