/**
 * Queue for batching and syncing missing translations to the backend
 * Uses debouncing (500ms default) and batching (50 items default)
 */
import type { EventEmitter } from '../base/event-emitter.js';
import type { IAsyncRepository } from '../interfaces/repository.interface.js';
export interface MissingTranslationItem {
    key: string;
    fallbackValue: string;
    styles?: Record<string, string[]>;
    locale: string;
    namespace: string;
}
export interface MissingTranslationQueueConfig {
    enabled: boolean;
    debounceMs: number;
    batchSize: number;
}
export declare class MissingTranslationQueue {
    private queue;
    private debounceTimer;
    private repository;
    private config;
    private eventEmitter;
    private recentlySynced;
    constructor(repository: IAsyncRepository, config: MissingTranslationQueueConfig, eventEmitter?: EventEmitter);
    /**
     * Add a missing translation to the queue
     * Triggers debounce timer or immediate flush if batch size reached
     */
    add(item: MissingTranslationItem): void;
    /**
     * Flush the queue - send all queued items to the backend
     * Fire-and-forget pattern (async but not awaited)
     */
    flush(): void;
    /**
     * Send batch to backend via repository
     * Uses repository's retry logic from makeRequest()
     */
    private syncBatch;
    /**
     * Fallback: sync items individually in parallel
     */
    private syncIndividually;
    /**
     * Get current queue size (for debugging)
     */
    getQueueSize(): number;
    /**
     * Get queue stats (for debugging)
     */
    getStats(): {
        queueSize: number;
        enabled: boolean;
        debounceMs: number;
        batchSize: number;
    };
    /**
     * Cleanup - clear timer and queue
     */
    destroy(): void;
}
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