export interface QueuedMessage {
    id: string;
    levelId: number;
    levelType: string;
    recipient: string;
    message: string;
    type?: 'EMAIL' | 'SMS' | 'WA' | 'TELEPHONE';
    priority: 'high' | 'medium' | 'low';
    scheduledFor?: Date;
    metadata?: any;
    createdAt: Date;
    retryCount: number;
    maxRetries: number;
}
export declare class IntegrationQueueService {
    private readonly logger;
    private queue;
    private processing;
    constructor();
    queueMessage(levelId: number, levelType: string, recipient: string, message: string, type?: 'EMAIL' | 'SMS' | 'WA' | 'TELEPHONE', priority?: 'high' | 'medium' | 'low', scheduledFor?: Date, metadata?: any): Promise<string>;
    queueBulkMessages(levelId: number, levelType: string, recipients: string[], message: string, type?: 'EMAIL' | 'SMS' | 'WA' | 'TELEPHONE', priority?: 'high' | 'medium' | 'low', metadata?: any): Promise<string[]>;
    getQueueStats(): {
        total: number;
        pending: number;
        scheduled: number;
        byPriority: {
            high: number;
            medium: number;
            low: number;
        };
        processing: boolean;
    };
    private processQueue;
    private sortQueue;
    private generateMessageId;
    isQueueEmpty(): boolean;
    getQueueLength(): number;
    clearQueue(): void;
    cancelMessage(messageId: string): boolean;
}