import "reflect-metadata";
import { BackoffType, MissedRunStrategy } from "./tasks-model.js";
/**
 * Metadata key that marks methods with periodic task schedule definition.
 */
export declare const TASKS_QUEUE_SCHEDULED_TASK_METADATA: unique symbol;
interface ScheduledTaskBaseOptions {
    /**
     * Unique periodic task name used for deduplication.
     */
    name: string;
    /**
     * Queue that should receive periodic task runs.
     */
    queue: string;
    /**
     * Optional pool where the method worker should be registered.
     * Defaults to `default`.
     */
    pool?: string;
    /**
     * Optional initial start time.
     */
    startAfter?: Date;
    /**
     * Optional task priority.
     */
    priority?: number;
    /**
     * Optional payload passed to the worker.
     */
    payload?: object;
    /**
     * Optional per-attempt timeout in milliseconds.
     */
    timeout?: number;
    /**
     * Optional maximum attempts.
     */
    retries?: number;
    /**
     * Optional retry backoff in milliseconds.
     */
    backoff?: number;
    /**
     * Optional retry backoff type.
     */
    backoffType?: BackoffType;
    /**
     * Optional periodic missed-run strategy.
     */
    missedRunStrategy?: MissedRunStrategy;
    /**
     * If true, replaces an existing periodic task with the same name.
     */
    replaceExisting?: boolean;
}
export interface ScheduledCronTaskOptions extends ScheduledTaskBaseOptions {
    /**
     * Cron expression for periodic scheduling.
     */
    cron: string;
    fixedRate?: never;
    fixedDelay?: never;
}
export interface ScheduledFixedRateTaskOptions extends ScheduledTaskBaseOptions {
    /**
     * Fixed-rate interval in milliseconds.
     */
    fixedRate: number;
    cron?: never;
    fixedDelay?: never;
}
export interface ScheduledFixedDelayTaskOptions extends ScheduledTaskBaseOptions {
    /**
     * Fixed-delay interval in milliseconds.
     */
    fixedDelay: number;
    cron?: never;
    fixedRate?: never;
}
/**
 * Method-level schedule definition discovered via NestJS providers.
 */
export type ScheduledTaskOptions = ScheduledCronTaskOptions | ScheduledFixedRateTaskOptions | ScheduledFixedDelayTaskOptions;
/**
 * Mark a provider method with a periodic schedule declaration.
 *
 * The decorator declares schedule metadata and auto-registers the decorated
 * method as a queue worker during NestJS module initialization.
 */
export declare const ScheduledTask: (options: ScheduledTaskOptions) => MethodDecorator;
export {};