"""Minimal .env loader so local runs match the systemd EnvironmentFile. Never overwrites
variables already set in the environment."""
import os
import pathlib


def load(path='.env'):
    file = pathlib.Path(path)
    if not file.is_file():
        return
    for line in file.read_text().splitlines():
        line = line.strip()
        if not line or line.startswith('#') or '=' not in line:
            continue
        key, _, value = line.partition('=')
        os.environ.setdefault(key.strip(), value.strip().strip('\'"'))


def env_int(name, default):
    try:
        return int(os.environ.get(name, default))
    except (TypeError, ValueError):
        return default