import type { CronJobLogEntry } from "@rebasepro/types";
import type { DataDriver } from "@rebasepro/types";
/**
 * Persistence layer for cron job execution logs.
 *
 * Uses the DataDriver's `admin.executeSql` capability to store logs in a
 * `rebase.cron_logs` table. Falls back gracefully if the driver doesn't
 * support SQL (e.g. MongoDB) — in that case, no persistence occurs.
 */
export interface CronStore {
    /** Ensure the backing table exists. Called once on startup. */
    ensureTable(): Promise<void>;
    /** Persist a single log entry after execution. */
    insertLog(entry: CronJobLogEntry): Promise<void>;
    /**
     * Fetch the most recent logs for a job.
     * @param jobId  The job identifier
     * @param limit  Max entries to return (default 50)
     * @returns Logs sorted newest-first
     */
    fetchLogs(jobId: string, limit?: number): Promise<CronJobLogEntry[]>;
    /**
     * Fetch aggregate stats for all jobs (totalRuns, totalFailures, lastRunAt).
     * Used to seed in-memory counters on startup.
     */
    fetchJobStats(): Promise<Map<string, {
        totalRuns: number;
        totalFailures: number;
        lastRunAt?: string;
    }>>;
}
export declare function createCronStore(driver: DataDriver): CronStore | undefined;