import type { ChatOptions, ChatResult, ChatSessionInfo, ChatSessionState } from "../types.js";
import type { GenerateService } from "./generate.js";
export declare class ChatService {
    private generateService;
    private sessions;
    private chatLocks;
    constructor(generateService: GenerateService);
    chat(sessionId: string, prompt: string, options?: ChatOptions): Promise<ChatResult>;
    private _doChat;
    getSession(sessionId: string): ChatSessionState | undefined;
    listSessions(): ChatSessionInfo[];
    deleteSession(sessionId: string): boolean;
    clearAll(): void;
    clearAccount(accountIndex: number): void;
    chooseCandidate(sessionId: string, candidateIndex: number): void;
    private applyMetadataUpdate;
}
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