"""What a question put to every server came back with (B-78).

`active` is the answer of the connection the platform is running on, `others` those of
each other configured server in configuration order; `None` stands for "no usable
answer" (unreachable, timed out, an error that is not an answer)."""

from typing import NamedTuple


class ServerAnswers(NamedTuple):
    active: object | None
    others: tuple
    others_needed: int  # how many of `others` must have answered for the network to count

    @property
    def answered_others(self) -> list:
        return [answer for answer in self.others if answer is not None]

    @property
    def complete(self) -> bool:
        """Enough of the network answered for its silence to mean something: the active
        server and at least `others_needed` of the others."""
        return self.active is not None and len(self.answered_others) >= self.others_needed

    @property
    def all(self) -> list:
        return ([] if self.active is None else [self.active]) + self.answered_others