import { Supportable, ReadonlyObservable } from '@usels/core';

interface UseBatteryReturn extends Supportable {
    /** Whether the battery is charging */
    charging$: ReadonlyObservable<boolean>;
    /** Time in seconds until the battery is fully charged */
    chargingTime$: ReadonlyObservable<number>;
    /** Time in seconds until the battery is fully discharged */
    dischargingTime$: ReadonlyObservable<number>;
    /** Battery level (0 to 1) */
    level$: ReadonlyObservable<number>;
}
/**
 * Framework-agnostic reactive battery status.
 *
 * Resolves `navigator.getBattery()` lazily inside `onMount` and syncs
 * `charging` / `chargingTime` / `dischargingTime` / `level` observables
 * with the `BatteryManager` instance. Listeners are torn down on unmount.
 *
 * SSR-safe: falls back to defaults (`charging=false`, `level=1`) when
 * `navigator` or `getBattery` is unavailable.
 */
declare function createBattery(): UseBatteryReturn;

export { type UseBatteryReturn, createBattery };