"""config.py — env-driven settings (plan §11)."""

from pathlib import Path

from mcp_server.config import Settings, get_settings


def test_defaults():
    settings = Settings(_env_file=None)
    assert settings.elabftw_timeout == 10.0
    assert settings.elabftw_retries == 2
    assert settings.labvoice_db_path == Path("~/.labvoice/journal.sqlite")
    assert settings.labvoice_template_desc_limit == 200
    assert settings.labvoice_rest_token is None
    assert settings.labvoice_embed_model is None


def test_default_unit_whitelist_matches_plan():
    settings = Settings(_env_file=None)
    assert "μL" in settings.unit_whitelist
    assert "mL" in settings.unit_whitelist
    assert "ea" in settings.unit_whitelist


def test_unit_whitelist_parsing_ignores_blanks_and_spaces():
    settings = Settings(_env_file=None, labvoice_unit_whitelist=" mL , L , , ea ")
    assert settings.unit_whitelist == ("mL", "L", "ea")


def test_api_base_url_strips_trailing_slash():
    settings = Settings(_env_file=None, elabftw_url="https://eln.example.org/")
    assert settings.api_base_url == "https://eln.example.org/api/v2"


def test_env_overrides(monkeypatch):
    monkeypatch.setenv("ELABFTW_URL", "https://eln2.example.org")
    monkeypatch.setenv("ELABFTW_TIMEOUT", "3.5")
    monkeypatch.setenv("LABVOICE_DB_PATH", "/tmp/other.sqlite")
    settings = Settings(_env_file=None)
    assert settings.elabftw_url == "https://eln2.example.org"
    assert settings.elabftw_timeout == 3.5
    assert settings.labvoice_db_path == Path("/tmp/other.sqlite")


def test_get_settings_is_cached(monkeypatch):
    monkeypatch.setenv("ELABFTW_URL", "https://a.example.org")
    first = get_settings()
    monkeypatch.setenv("ELABFTW_URL", "https://b.example.org")
    assert get_settings() is first
    get_settings.cache_clear()