/**
 * SQLite Database Adapter using node:sqlite
 *
 * Keeps the existing DatabaseAdapter surface while avoiding external native addon installation.
 */
import { DatabaseAdapter, type VectorSearchResult, type RunResult } from './base-adapter.js';
import { type Statement } from './statement.js';
interface SQLiteAdapterConfig {
    dbPath?: string;
}
interface NodeSQLiteDatabaseLike {
    exec(sql: string): void;
    close(): void;
    prepare(sql: string): NodeSQLiteStatementLike;
}
interface NodeSQLiteStatementLike {
    all: (...params: unknown[]) => unknown[];
    get: (...params: unknown[]) => unknown;
    run: (...params: unknown[]) => {
        changes: number;
        lastInsertRowid: number | bigint;
    };
}
declare class NodeSQLiteConnection {
    private db;
    private connected;
    private isBetterSQLite3;
    constructor(db: NodeSQLiteDatabaseLike);
    prepare(sql: string): NodeSQLiteStatementLike;
    exec(sql: string): void;
    pragma(sql: string, options?: {
        simple?: boolean;
    }): unknown;
    close(): void;
    get open(): boolean;
}
export declare class NodeSQLiteAdapter extends DatabaseAdapter {
    private config;
    private db;
    private _vectorSearchEnabled;
    private vectorCache;
    private topicCache;
    constructor(config?: SQLiteAdapterConfig);
    get vectorSearchEnabled(): boolean;
    getDbPath(): string;
    connect(): NodeSQLiteConnection;
    reloadVectorCache(): void;
    private loadVectorCache;
    disconnect(): void;
    isConnected(): boolean;
    prepare(sql: string): Statement;
    exec(sql: string): void;
    transaction<T>(fn: () => T): T;
    vectorSearch(embedding: Float32Array | number[], limit?: number, topicPrefix?: string): VectorSearchResult[] | null;
    insertEmbedding(rowid: number, embedding: Float32Array | number[]): RunResult | null;
    getLastInsertRowid(): number;
    runMigrations(migrationsDir: string): void;
    private repairSkippedFeatureMigrations;
    private applyRepairMigration;
    private recoverMemoryProvenanceMigration032;
    private assertMigration032Complete;
    private recoverConnectorEventScopeMigration034;
    private assertMigration034Complete;
    private tableColumns;
    private tableExists;
    private indexExists;
    private migrateFromVssMemories;
}
export default NodeSQLiteAdapter;
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