export declare class Database {
    private backend;
    private constructor();
    static create(): Promise<Database>;
    /**
     * Priority cascade:
     *   1. better-sqlite3 (native, ~5-10x faster for bulk inserts)
     *   2. sql.js (WASM, zero native deps, always works)
     */
    private static createWithFallback;
    private initSchema;
    upsertCodebase(name: string, language: string, rootPath: string): number;
    getCodebase(name: string): {
        id: number;
        name: string;
        language: string;
        root_path: string;
        indexed_at: string | null;
        file_count: number;
        symbol_count: number;
    } | undefined;
    getAllCodebases(): {
        id: number;
        name: string;
        language: string;
        root_path: string;
        indexed_at: string | null;
        file_count: number;
        symbol_count: number;
    }[];
    updateCodebaseStats(codebaseId: number): void;
    upsertFile(codebaseId: number, path: string, mtimeMs: number): number;
    getFile(codebaseId: number, path: string): {
        id: number;
        path: string;
        mtime_ms: number;
    } | undefined;
    getFilesByCodebase(codebaseId: number): {
        id: number;
        path: string;
        mtime_ms: number;
    }[];
    deleteFileData(fileId: number): void;
    insertSymbol(codebaseId: number, fileId: number, name: string, qualified: string, kind: string, lineStart?: number, lineEnd?: number, exported?: boolean, metadata?: string): number;
    findSymbol(codebaseId: number, qualified: string): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        line_start: number | null;
        line_end: number | null;
        exported: number;
        metadata: string | null;
        file_id: number;
    } | undefined;
    findSymbolsByName(codebaseId: number, name: string): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        line_start: number | null;
        line_end: number | null;
        file_id: number;
    }[];
    searchSymbols(codebaseId: number, pattern: string, kinds?: string[], limit?: number): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        line_start: number | null;
        line_end: number | null;
        file_path: string;
        exported: number;
    }[];
    getSymbolsByFile(fileId: number, kinds?: string[]): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        line_start: number | null;
        line_end: number | null;
        exported: number;
        metadata: string | null;
    }[];
    insertEdge(sourceId: number, targetId: number, kind: string): void;
    insertModuleDep(sourceFileId: number, targetFileId: number, depKind: string): void;
    traceCallees(codebaseId: number, qualified: string, maxDepth?: number): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        depth: number;
        path: string;
    }[];
    traceCallers(codebaseId: number, qualified: string, maxDepth?: number): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        depth: number;
        path: string;
    }[];
    traceModuleDeps(codebaseId: number, filePath: string, direction?: 'imports' | 'imported_by' | 'both', maxDepth?: number): {
        id: number;
        path: string;
        depth: number;
        direction: string;
    }[];
    getDirectCallees(symbolId: number): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        edge_kind: string;
    }[];
    getDirectCallers(symbolId: number): {
        id: number;
        name: string;
        qualified: string;
        kind: string;
        edge_kind: string;
    }[];
    getEdgeCount(codebaseId: number): number;
    getModuleDepCount(codebaseId: number): number;
    runInTransaction<R>(fn: () => R): R;
    /** Save database state (relevant for sql.js WASM backend). */
    save(): void;
    close(): void;
}
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