from collections.abc import Callable, Iterable, Iterator
from sys import _OptExcInfo
from typing import Any, Protocol
from typing_extensions import TypeAlias

__all__ = ["StartResponse", "WSGIEnvironment", "WSGIApplication", "InputStream", "ErrorStream", "FileWrapper"]

class StartResponse(Protocol):
    def __call__(
        self, status: str, headers: list[tuple[str, str]], exc_info: _OptExcInfo | None = ..., /
    ) -> Callable[[bytes], object]: ...

WSGIEnvironment: TypeAlias = dict[str, Any]
WSGIApplication: TypeAlias = Callable[[WSGIEnvironment, StartResponse], Iterable[bytes]]

class InputStream(Protocol):
    def read(self, size: int = ..., /) -> bytes: ...
    def readline(self, size: int = ..., /) -> bytes: ...
    def readlines(self, hint: int = ..., /) -> list[bytes]: ...
    def __iter__(self) -> Iterator[bytes]: ...

class ErrorStream(Protocol):
    def flush(self) -> object: ...
    def write(self, s: str, /) -> object: ...
    def writelines(self, seq: list[str], /) -> object: ...

class _Readable(Protocol):
    def read(self, size: int = ..., /) -> bytes: ...
    # Optional: def close(self) -> object: ...

class FileWrapper(Protocol):
    def __call__(self, file: _Readable, block_size: int = ..., /) -> Iterable[bytes]: ...
