import { DatabaseService } from '../database/database.service.js';
export type SessionType = 'scheduled' | 'chat' | 'system';
export interface AgentSession {
    id: string;
    createdAt: number;
    lastActiveAt: number;
    messageCount: number;
    status: 'idle' | 'active' | 'error';
    /** 绑定的智能体 ID，不选则为 default（主智能体） */
    agentId?: string;
    workspace?: string;
    provider?: string;
    model?: string;
    title?: string;
    preview?: string;
    type?: SessionType;
}
export interface ChatMessage {
    id: string;
    sessionId: string;
    role: 'user' | 'assistant' | 'system';
    content: string;
    timestamp: number;
    toolCalls?: any[];
}
/**
 * Agents service: session + history storage in SQLite.
 * Conversation is done via frontend -> Gateway (WebSocket) -> agent; NestJS is not in the chat path.
 */
export declare class AgentsService {
    private readonly db;
    private eventListeners;
    constructor(db: DatabaseService);
    addEventListener(event: string, listener: (data: any) => void): () => void;
    private emitEvent;
    private rowToSession;
    private rowToMessage;
    createSession(options?: {
        id?: string;
        agentId?: string;
        workspace?: string;
        provider?: string;
        model?: string;
        title?: string;
        type?: SessionType;
    }): Promise<AgentSession>;
    /** 获取或创建会话（指定 id 时复用同一会话，用于定时任务固定 sessionId） */
    getOrCreateSession(sessionId: string, options?: {
        agentId?: string;
        workspace?: string;
        title?: string;
        type?: SessionType;
    }): Promise<AgentSession>;
    getSessions(): AgentSession[];
    getSession(sessionId: string): AgentSession | undefined;
    /** 更新会话的当前 agent（同一 session 内切换 agent 时调用） */
    updateSessionAgentId(sessionId: string, agentId: string): void;
    deleteSession(sessionId: string): Promise<void>;
    getMessageHistory(sessionId: string): ChatMessage[];
    addAssistantMessage(sessionId: string, content: string): void;
    appendMessage(sessionId: string, role: 'user' | 'assistant', content: string, options?: {
        toolCalls?: any[];
        contentParts?: any[];
    }): void;
    /** 清除会话的所有对话消息（保留会话本身，message_count 置 0） */
    clearSessionMessages(sessionId: string): void;
}