"""Type definitions for pydantic-settings sources."""

from __future__ import annotations as _annotations

from collections.abc import Sequence
from pathlib import Path
from typing import TYPE_CHECKING, Any, Union

if TYPE_CHECKING:
    from pydantic._internal._dataclasses import PydanticDataclass
    from pydantic.main import BaseModel

    PydanticModel = Union[PydanticDataclass, BaseModel]
else:
    PydanticModel = Any


class EnvNoneType(str):
    pass


class NoDecode:
    """Annotation to prevent decoding of a field value."""

    pass


class ForceDecode:
    """Annotation to force decoding of a field value."""

    pass


DotenvType = Union[Path, str, Sequence[Union[Path, str]]]
PathType = Union[Path, str, Sequence[Union[Path, str]]]
DEFAULT_PATH: PathType = Path('')

# This is used as default value for `_env_file` in the `BaseSettings` class and
# `env_file` in `DotEnvSettingsSource` so the default can be distinguished from `None`.
# See the docstring of `BaseSettings` for more details.
ENV_FILE_SENTINEL: DotenvType = Path('')


class _CliSubCommand:
    pass


class _CliPositionalArg:
    pass


class _CliImplicitFlag:
    pass


class _CliExplicitFlag:
    pass


class _CliUnknownArgs:
    pass


__all__ = [
    'DEFAULT_PATH',
    'ENV_FILE_SENTINEL',
    'DotenvType',
    'EnvNoneType',
    'ForceDecode',
    'NoDecode',
    'PathType',
    'PydanticModel',
    '_CliExplicitFlag',
    '_CliImplicitFlag',
    '_CliPositionalArg',
    '_CliSubCommand',
    '_CliUnknownArgs',
]
