from collections.abc import Generator
from dataclasses import dataclass
from typing import Any

import pytest


@pytest.fixture(scope="session", autouse=True)
def db() -> Generator[None, None, None]:
    """The engine holds no database state, so these tests need no database."""
    yield


@dataclass
class _Device:
    kind: str
    id: str
    state: str


@dataclass
class _House:
    time: str
    outdoor_c: float
    dark: bool
    user_area: str | None
    areas: dict[str, list[_Device]]


class FakeWren:
    """The model package's surface, answering whatever a test sets ``answer`` to."""

    AREAS = [
        *("living room", "kitchen", "bathroom", "bedroom", "office"),
        *("garden", "patio", "garage", "driveway", "balcony"),
    ]
    KINDS = ["light", "media", "heat", "shutter", "water"]
    Device = _Device
    House = _House

    def __init__(self) -> None:
        self.answer: tuple[list[Any], float] = ([], 1.0)
        self.houses: list[_House] = []

    def act(self, command: str, house: _House) -> tuple[list[Any], float]:
        self.houses.append(house)
        return self.answer


@pytest.fixture
def fake_wren(monkeypatch: pytest.MonkeyPatch) -> FakeWren:
    """Stands in for the optional model package the wren node imports."""
    fake = FakeWren()
    monkeypatch.setattr("fluksio.flow.nodes.wren._wren", lambda: fake)
    return fake