import type { StoredMessage, ChatStats, TelegramMessage } from "./types.js";
export declare class Storage {
    private dbDir;
    private db;
    private dbPath;
    private saveTimer;
    private dirty;
    constructor(dbDir: string);
    init(): Promise<void>;
    private saveToDisk;
    private query;
    private run;
    getMeta(key: string): string | null;
    setMeta(key: string, value: string): void;
    insertMessage(msg: TelegramMessage, isMention: boolean): void;
    getRecentMessages(chatId: number, limit: number, beforeMessageId?: number): StoredMessage[];
    getNewMessages(chatId: number, sinceMessageId: number): StoredMessage[];
    searchMessages(query: string, chatId?: number, limit?: number, fromUsername?: string): {
        messages: StoredMessage[];
        total: number;
    };
    getUnprocessedMentions(chatId?: number, limit?: number): StoredMessage[];
    getMentions(chatId?: number, includeProcessed?: boolean, limit?: number): StoredMessage[];
    markMentionsRead(messageIds: number[], chatId?: number): number;
    getThread(chatId: number, messageId: number, maxDepth?: number): StoredMessage[];
    getChatStats(chatId: number): ChatStats;
    close(): void;
}