import { ChatSession, ChatHistoryOptions, ChatMessage, HistoryStats } from '../shared/types.js';

declare class DatabaseAdapter {
    #private;
    constructor();
    ensureDatabaseInitialized(): Promise<void>;
    createSession(profile: string, title?: string, type?: 'ask' | 'chat' | 'exec'): Promise<string>;
    getSession(sessionId: string): Promise<ChatSession | null>;
    getSessions(options?: ChatHistoryOptions): Promise<ChatSession[]>;
    deleteSession(sessionId: string): Promise<boolean>;
    updateSessionTitle(sessionId: string, title: string): Promise<boolean>;
    addMessage(sessionId: string, role: 'user' | 'assistant' | 'system', content: string, provider: string, model: string, temperature?: number, maxTokens?: number, metadata?: any): Promise<string>;
    getMessages(sessionId: string, limit?: number): Promise<ChatMessage[]>;
    searchMessages(options?: ChatHistoryOptions): Promise<ChatMessage[]>;
    getStats(profile?: string): Promise<HistoryStats>;
    deleteOldSessions(profile: string, days: number): Promise<number>;
    vacuum(): Promise<void>;
    exportChatHistory(options?: ChatHistoryOptions): Promise<{
        sessions: ChatSession[];
        messages: Record<string, ChatMessage[]>;
        stats: HistoryStats;
    }>;
    private ensureActTemplatesTable;
    createActTemplate(template: {
        id: string;
        label: string;
        category: string;
        description: string;
        template: string;
    }): Promise<void>;
    updateActTemplate(id: string, updates: Partial<{
        label: string;
        category: string;
        description: string;
        template: string;
    }>): Promise<boolean>;
    deleteActTemplate(id: string): Promise<boolean>;
    getActTemplate(id: string): Promise<any | null>;
    listActTemplates(customOnly?: boolean): Promise<any[]>;
    templateExists(id: string): Promise<boolean>;
    close(): Promise<void>;
}

export { DatabaseAdapter };