/**
 * SyncConfigRepository - Manages sync configuration state
 *
 * Handles the singleton sync_config record for registry sync settings.
 */
import type { Database as DatabaseType } from '../db/database-interface.js';
/**
 * Sync frequency options
 */
export type SyncFrequency = 'daily' | 'weekly';
/**
 * Interval in milliseconds for each frequency
 */
export declare const FREQUENCY_INTERVALS: Record<SyncFrequency, number>;
/**
 * Sync configuration
 */
export interface SyncConfig {
    id: string;
    enabled: boolean;
    frequency: SyncFrequency;
    intervalMs: number;
    lastSyncAt: string | null;
    nextSyncAt: string | null;
    lastSyncCount: number;
    lastSyncError: string | null;
    createdAt: string;
    updatedAt: string;
}
/**
 * Partial update input
 */
export interface SyncConfigUpdate {
    enabled?: boolean;
    frequency?: SyncFrequency;
}
/**
 * Repository for sync configuration management
 */
export declare class SyncConfigRepository {
    private db;
    private stmts;
    constructor(db: DatabaseType);
    /**
     * Ensure sync_config table exists and has default row
     */
    private ensureTable;
    private prepareStatements;
    private rowToConfig;
    /**
     * Get current sync configuration
     */
    getConfig(): SyncConfig;
    /**
     * Update sync configuration
     */
    updateConfig(update: SyncConfigUpdate): SyncConfig;
    /**
     * Record successful sync completion
     */
    setLastSync(timestamp: string, count: number): void;
    /**
     * Record sync error
     */
    setLastSyncError(error: string): void;
    /**
     * Clear any stored error
     */
    clearError(): void;
    /**
     * Calculate next sync time based on last sync and interval
     */
    calculateNextSync(lastSyncAt: string, intervalMs: number): string;
    /**
     * Check if sync is due based on current time
     */
    isSyncDue(): boolean;
    /**
     * Enable automatic sync
     */
    enable(): SyncConfig;
    /**
     * Disable automatic sync
     */
    disable(): SyncConfig;
    /**
     * Set sync frequency
     */
    setFrequency(frequency: SyncFrequency): SyncConfig;
}
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