from __future__ import annotations

import os


def _env(name: str, default: str = "") -> str:
    value = os.getenv(name, default)
    return value.strip() if isinstance(value, str) else default


def _env_bool(name: str, default: str = "false") -> bool:
    return _env(name, default).lower() in {"1", "true", "yes", "y", "on"}


def _env_int(name: str, default: int) -> int:
    raw = _env(name, str(default))
    try:
        return int(raw)
    except ValueError:
        return default


def _env_float(name: str, default: float) -> float:
    raw = _env(name, str(default))
    try:
        return float(raw)
    except ValueError:
        return default