import os
from typing import Any, Tuple, List


def validate_cfg(cfg: dict[str, Any]) -> Tuple[List[str], List[str]]:
    errors: List[str] = []
    warnings: List[str] = []

    tg = cfg.get("telegram", {})
    if not tg.get("token"):
        errors.append("telegram.token is missing")
    if not tg.get("admin_id"):
        errors.append("telegram.admin_id is missing")

    thresholds = cfg.get("thresholds", {})
    for key in ("disk_warn", "load_warn", "high_load_warn"):
        if key not in thresholds:
            warnings.append(f"thresholds.{key} not set")

    paths = cfg.get("paths", {})
    env_path = paths.get("restic_env")
    if env_path and not os.path.exists(env_path):
        warnings.append(f"paths.restic_env not found: {env_path}")

    npm = cfg.get("npmplus", {})
    if npm and not npm.get("token") and (not npm.get("identity") or not npm.get("secret")):
        warnings.append("npmplus: token missing and identity/secret missing")

    ow = cfg.get("openwrt", {})
    if ow and not ow.get("host"):
        warnings.append("openwrt.host is missing")

    return errors, warnings