/**
 * Index Persistence Layer
 *
 * Handles serialization and storage of indexes for durability.
 * Indexes are stored in a special collection alongside application data.
 */
import type { JsDb } from './feltdb.js';
import type { IndexConfig } from './index-types.js';
export interface StoredIndex {
    config: IndexConfig;
    version: number;
    createdAt: number;
    lastUpdated: number;
    entryCount: number;
}
export interface IndexSnapshot {
    collectionName: string;
    indexes: StoredIndex[];
    timestamp: number;
}
export declare class IndexStore {
    private db;
    private collectionName;
    constructor(db: JsDb, collectionName: string);
    /**
     * Save index metadata to storage.
     * Stores index configuration but not the actual index data (rebuilt on demand).
     */
    saveIndexConfig(config: IndexConfig, entryCount: number): Promise<void>;
    /**
     * Load all index configurations for a collection.
     */
    loadIndexConfigs(): Promise<IndexConfig[]>;
    /**
     * Get specific index configuration.
     */
    getIndexConfig(indexName: string): Promise<IndexConfig | null>;
    /**
     * Delete index metadata from storage.
     */
    deleteIndexConfig(indexName: string): Promise<void>;
    /**
     * Update index metadata (entry count, timestamp).
     */
    updateIndexStats(indexName: string, entryCount: number): Promise<void>;
    /**
     * Get full index snapshot (configuration + metadata).
     */
    getSnapshot(): Promise<IndexSnapshot>;
}
/**
 * Index rebuilder - reconstructs indexes from collection data.
 * Used when loading persisted indexes at startup.
 */
export declare class IndexRebuilder {
    static rebuildIndexes(db: JsDb, collectionName: string, items: any[], indexConfigs: IndexConfig[]): Promise<Map<string, any>>;
    /**
     * Check if an index is stale by comparing entry count to collection size.
     */
    static isStale(indexEntryCount: number, collectionSize: number): boolean;
}
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