"""Shared test setup: a clean environment with STACK=ci and no .env files picked up."""

from __future__ import annotations

import os
from collections.abc import Iterator

import pytest

_PREFIXES = ("PS_", "PG_", "LDAP_", "SMTP_", "VISUAL_", "MFILES_")
_NAMES = {
    "STACK",
    "SITE_ID",
    "SITE_TZ",
    "PUBLIC_URL",
    "TRUSTED_PROXY_HOST",
    "ASSETS_DIR",
    "BACKUP_DIR",
    "SESSION_KEY_FILE",
    "SEAL_KEY_FILE",
    "STATIC_DIR",
    "LOG_LEVEL",
    "NOTIFY_DRY_RUN",
    "WORKER_BEAT_FILE",
}


@pytest.fixture(autouse=True)
def clean_env(monkeypatch: pytest.MonkeyPatch, tmp_path_factory: pytest.TempPathFactory) -> Iterator[None]:
    for key in list(os.environ):
        if key.upper() in _NAMES or key.upper().startswith(_PREFIXES):
            monkeypatch.delenv(key, raising=False)
    nowhere = tmp_path_factory.getbasetemp() / "no-such.env"
    monkeypatch.setenv("VISUAL_ENV_FILE", str(nowhere))
    monkeypatch.setenv("MFILES_ENV_FILE", str(nowhere))
    monkeypatch.setenv("STACK", "ci")
    monkeypatch.setenv("TRUSTED_PROXY_HOST", "")
    from packetstation.settings import clear_settings_cache

    clear_settings_cache()
    yield
    clear_settings_cache()