/// <reference types="emscripten" />
/**
 * Battery information for the device.
 * Can be extended in the future with additional battery properties (charging, times, etc.)
 */
interface BatteryInfo {
    /**
     * Battery level as a percentage (0-100).
     * null if battery data is not available.
     */
    percentage: number | null;
}
/**
 * Interface for accessing battery information.
 */
interface BatteryInterface {
    /**
     * Get the current battery information for the device.
     * Returns the last known battery information, or null if not available.
     * Battery information is updated via Battery Status API events.
     *
     * @returns Battery information including percentage.
     */
    getBatteryInfo(): BatteryInfo;
}
/**
 * Device information payload to be sent from main thread to worker.
 */
interface DeviceInfo {
    isTablet: boolean;
    batteryInfo: BatteryInfo;
}
/**
 * Web implementation of BatteryInterface that uses browser APIs to detect battery status.
 * This class runs on the main thread and manages battery information.
 *
 * Use the static `create()` method to properly initialize the instance.
 * Call `dispose()` when done to clean up event listeners.
 */
declare class WebBatteryInterface implements BatteryInterface {
    private batteryManager;
    private currentBatteryPercentage;
    private batteryChangeListeners;
    private handleOnLevelChange;
    private constructor();
    /**
     * Creates and initializes a new WebBatteryInterface instance.
     * Asynchronously initializes battery manager.
     *
     * @returns Promise resolving to an initialized WebBatteryInterface instance
     */
    static create(): Promise<WebBatteryInterface>;
    /**
     * Register a listener to be called when battery level changes.
     * @param listener Function to call when battery changes
     */
    addBatteryChangeListener(listener: (batteryInfo: BatteryInfo) => void): void;
    /**
     * Unregister a battery change listener.
     * @param listener The listener to remove
     */
    removeBatteryChangeListener(listener: (batteryInfo: BatteryInfo) => void): void;
    /**
     * Dispose of the WebDeviceInterface and remove all event listeners.
     * Call this when you're done using the interface to avoid memory leaks.
     */
    dispose(): void;
    private notifyBatteryChange;
    private onLevelChange;
    /**
     * Get the current battery information for the device.
     * Returns the last known battery percentage, or null if not available.
     * Battery data is updated via Battery Status API events.
     *
     * @returns Battery information with percentage, or null if unavailable.
     */
    getBatteryInfo(): BatteryInfo;
    private initializeBatteryManager;
}

export { type BatteryInfo, type BatteryInterface, type DeviceInfo, WebBatteryInterface };