import importlib


import sqlmem.config as cfg


def _reload(monkeypatch, **env_vars):
    for key in ("SQLMEM_DEBUG", "SQLMEM_CACHE_DB", "SQLMEM_BACKUP_INTERVAL"):
        monkeypatch.delenv(key, raising=False)
    for key, val in env_vars.items():
        monkeypatch.setenv(key, val)
    importlib.reload(cfg)


def test_debug_defaults_to_false(monkeypatch):
    _reload(monkeypatch)
    assert cfg.DEBUG is False


def test_debug_true(monkeypatch):
    _reload(monkeypatch, SQLMEM_DEBUG="true")
    assert cfg.DEBUG is True


def test_debug_case_insensitive(monkeypatch):
    _reload(monkeypatch, SQLMEM_DEBUG="TRUE")
    assert cfg.DEBUG is True


def test_debug_explicit_false(monkeypatch):
    _reload(monkeypatch, SQLMEM_DEBUG="false")
    assert cfg.DEBUG is False


def test_cache_db_default_name(monkeypatch):
    _reload(monkeypatch)
    assert cfg.CACHE_DB_PATH.name == "cache.db"


def test_cache_db_custom_path(monkeypatch, tmp_path):
    custom = str(tmp_path / "my_cache.db")
    _reload(monkeypatch, SQLMEM_CACHE_DB=custom)
    assert cfg.CACHE_DB_PATH == tmp_path / "my_cache.db"


def test_backup_interval_default(monkeypatch):
    _reload(monkeypatch)
    assert cfg.BACKUP_INTERVAL_SECONDS == 3600


def test_backup_interval_custom(monkeypatch):
    _reload(monkeypatch, SQLMEM_BACKUP_INTERVAL="7200")
    assert cfg.BACKUP_INTERVAL_SECONDS == 7200