/**
 * Scheduler for wake-up tasks.
 *
 * Supports two types of scheduled tasks:
 *   - Cron-based: fires at specific times (e.g. "0 9 * * *" = 9am daily)
 *   - Delay-based: fires after N minutes of operator silence
 *
 * Schedule state is persisted to disk per-thread so tasks survive restarts.
 * The wait_for_instructions polling loop checks for due tasks on each timeout.
 */
import type { IScheduleRepository, ScheduledTask } from "../data/interfaces.js";
export declare class ScheduleRepository implements IScheduleRepository {
    loadSchedule(threadId: number): ScheduledTask[];
    saveSchedule(threadId: number, tasks: ScheduledTask[]): void;
    deleteSchedule(threadId: number): void;
    listSchedules(threadId: number): ScheduledTask[];
}
export declare const scheduleRepository: ScheduleRepository;
export declare function addSchedule(task: ScheduledTask): void;
export declare function removeSchedule(threadId: number, taskId: string): boolean;
/**
 * Remove all scheduled tasks for a thread.
 * Called when a Telegram topic is deleted.
 */
export declare function purgeSchedules(threadId: number): void;
export declare function listSchedules(threadId: number): ScheduledTask[];
/**
 * Generate a unique task ID.
 */
export declare function generateTaskId(): string;
export declare function matchesCron(cronExpr: string, date: Date): boolean;
/**
 * Check for due tasks and return the first one that should fire.
 *
 * @param threadId - Thread to check schedules for
 * @param lastOperatorMessageAt - Timestamp of last operator message (for idle detection)
 * @param hasNewMessages - Whether operator has sent messages since last check
 * @returns The due task's prompt, or null if nothing is due
 */
export declare function checkDueTasks(threadId: number, lastOperatorMessageAt: number, hasNewMessages: boolean): {
    prompt: string;
    task: ScheduledTask;
} | null;
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