"""Device ID rules — must match the Android app (SettingsRepository)."""

import re

# android- + 8 hex chars from UUID
ANDROID_DEVICE_ID = re.compile(r"^android-[0-9a-f]{8}$", re.IGNORECASE)


def is_valid_device_id(device_id: str) -> bool:
    return bool(ANDROID_DEVICE_ID.match((device_id or "").strip()))