"""Minimal env loader — no python-dotenv required."""
from __future__ import annotations

import os
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]


def load_dotenv(path: Path | None = None) -> None:
    env_path = path or (ROOT / ".env")
    if not env_path.is_file():
        return
    for line in env_path.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('"').strip("'"))


def require(*keys: str) -> dict[str, str]:
    load_dotenv()
    missing = [k for k in keys if not os.environ.get(k)]
    if missing:
        raise SystemExit(f"Missing env: {', '.join(missing)}. Copy .env.example → .env.")
    return {k: os.environ[k] for k in keys}