import { Factory } from '../types';

export interface PingService {
    /**
     * Check if the network is reachable.
     * Default: 300ms delay, returns true (optimistic).
     */
    ping(): Promise<boolean>;
}
export interface OnlineService {
    /**
     * Get current online status.
     * Default: uses navigator.onLine if available.
     */
    isOnline(): boolean;
    /**
     * Subscribe to online/offline events.
     * Default: uses window 'online'/'offline' events.
     *
     * @returns Unsubscribe function
     */
    subscribe(listener: (online: boolean) => void): VoidFunction;
}
/**
 * Service for checking network reachability.
 *
 * Default implementation: 300ms delay, always returns true (optimistic).
 *
 * Override for real connectivity check:
 * ```ts
 * container.set(pingService, () => ({
 *   ping: async () => {
 *     try {
 *       await fetch('/api/health', { method: 'HEAD' });
 *       return true;
 *     } catch { return false; }
 *   },
 * }));
 * ```
 */
export declare const pingService: Factory<PingService>;
/**
 * Service for online/offline event subscription.
 *
 * Default implementation: uses browser's navigator.onLine and window events.
 *
 * Override for React Native:
 * ```ts
 * import NetInfo from '@react-native-community/netinfo';
 *
 * container.set(onlineService, () => ({
 *   isOnline: () => true,
 *   subscribe: (listener) => NetInfo.addEventListener(s => listener(!!s.isConnected)),
 * }));
 * ```
 */
export declare const onlineService: Factory<OnlineService>;
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