import type Database from 'better-sqlite3';
export interface LastUpdate {
    hearthstone?: string;
}
export interface PipelineOptions {
    force?: boolean;
    dataDir?: string;
    fetchFn?: typeof fetch;
}
/**
 * Returns true if the cached snapshot is older than STALE_AFTER_MS.
 * Exported for testing.
 */
export declare function isStale(lastUpdate: LastUpdate, now?: Date, staleAfterMs?: number): boolean;
/**
 * Load last_update.json from the data directory.
 * Returns an empty object if the file does not exist.
 */
export declare function loadLastUpdate(dataDir?: string): LastUpdate;
/**
 * Save last_update.json to the data directory.
 */
export declare function saveLastUpdate(lastUpdate: LastUpdate, dataDir?: string): void;
/**
 * Returns true if no hearthstone data has ever been fetched.
 */
export declare function isFirstRun(lastUpdate: LastUpdate): boolean;
/**
 * Run the data pipeline: fetch cards from HearthstoneJSON and ingest into DB.
 *
 * Logic:
 * 1. Load last_update.json
 * 2. If we have data and not forced refresh, skip fetch (return existing count)
 * 3. Otherwise fetch cards, clear existing data, re-ingest
 * 4. On failure: if first run and no data, throw. Otherwise graceful degradation
 * 5. Save updated timestamp
 *
 * @returns Number of cards in the database after pipeline completes
 */
export declare function runPipeline(db: Database.Database, options?: PipelineOptions): Promise<number>;
//# sourceMappingURL=pipeline.d.ts.map