import { Job, JobStatus } from "../types";
import { JobStorage } from "./base-storage";
import type { Redis } from "ioredis";
/**
 * Redis storage adapter for JobQueue
 *
 * This storage adapter uses Redis to store jobs, making it suitable
 * for distributed environments with multiple instances/processes.
 *
 * Note: You must install the 'ioredis' package to use this adapter:
 * npm install ioredis
 */
export interface RedisStorage extends JobStorage {
    acquireNextJob(ttl?: number): Promise<Job | null>;
    getJobsByPriority(priority: number): Promise<Job[]>;
    getScheduledJobs(startTime: Date, endTime?: Date): Promise<Job[]>;
    clear(): Promise<void>;
}
export declare class RedisJobStorage implements RedisStorage {
    private readonly redis;
    private readonly keyPrefix;
    private readonly jobListKey;
    private readonly priorityQueueKeys;
    private readonly scheduledJobsKey;
    private readonly logging;
    private readonly saveJobScript;
    private readonly updateJobScript;
    private readonly moveScheduledJobsScript;
    private readonly completeJobScript;
    private readonly failJobScript;
    private readonly staleJobTimeout;
    /**
     * Create a new RedisJobStorage
     *
     * @param redis - An ioredis client instance
     * @param options - Configuration options
     */
    constructor(redis: Redis, options?: {
        keyPrefix?: string;
        logging?: boolean;
        staleJobTimeout?: number;
    });
    /**
     * Save a job to Redis using a Lua script
     */
    saveJob(job: Job): Promise<void>;
    /**
     * Get a job by ID
     */
    getJob(id: string): Promise<Job | null>;
    /**
     * Get jobs by status
     */
    getJobsByStatus(status: JobStatus): Promise<Job[]>;
    /**
     * Update a job using a Lua script
     */
    updateJob(job: Job): Promise<void>;
    /**
     * Acquire the next job from the queue, respecting priorities and scheduled times
     * Also checks for stale jobs that have been processing for too long
     * @returns The next job or null if no job is available
     */
    acquireNextJob(ttl?: number): Promise<Job | null>;
    /**
     * Move scheduled jobs to priority queues using a Lua script
     * @private
     */
    private moveScheduledJobs;
    /**
     * Serialize a job object for Redis storage
     * @private
     */
    private serializeJob;
    /**
     * Deserialize a job object from Redis storage
     * @private
     */
    private deserializeJob;
    private getJobKey;
    private getStatusKey;
    /**
     * Get jobs by priority
     * @param priority - The priority level (1-5)
     * @returns Array of jobs with the specified priority
     */
    getJobsByPriority(priority: number): Promise<Job[]>;
    /**
     * Get scheduled jobs within a time range
     * @param startTime - Start of time range (inclusive)
     * @param endTime - End of time range (inclusive)
     * @returns Array of scheduled jobs within the time range
     */
    getScheduledJobs(startTime?: Date, endTime?: Date): Promise<Job[]>;
    /**
     * Complete a job using a Lua script
     *
     * @param jobId - ID of the job to complete
     * @param result - Result of the job
     */
    completeJob(jobId: string, result: any): Promise<void>;
    /**
     * Fail a job using a Lua script
     *
     * @param jobId - ID of the job to fail
     * @param error - Error message
     */
    failJob(jobId: string, error: string): Promise<void>;
    /**
     * Clear all jobs
     */
    clear(): Promise<void>;
}