export interface CacheBackend {
    get(key: string): Promise<unknown | null>;
    set(key: string, value: unknown, ttlSeconds?: number): Promise<void>;
    clear(): Promise<void>;
}
export interface VectorEmbedding {
    vector: number[];
    dimension: number;
}
export interface LLMResponse {
    id: string;
    text: string;
    metadata?: Record<string, unknown>;
    quality_score?: number;
    category?: string;
    tags?: string[];
    [key: string]: unknown;
}
export interface CachedLLMEntry {
    query: string;
    query_embedding: VectorEmbedding;
    responses: LLMResponse[];
    variant_strategy?: "random" | "round-robin" | "deterministic" | "weighted";
    weights?: number[];
    seed?: string | number;
    ttl?: number;
    created_at: Date;
    last_accessed?: Date;
}
export interface SemanticSearchResult {
    query: string;
    query_embedding: VectorEmbedding;
    matches: Array<{
        entry: CachedLLMEntry;
        similarity_score: number;
        selected_response: LLMResponse;
    }>;
    total_matches: number;
    search_time_ms: number;
}
export interface VectorSearchBackend extends CacheBackend {
    storeLLMResponse(entry: CachedLLMEntry): Promise<void>;
    searchSimilar(query: string, query_embedding: VectorEmbedding, limit?: number, similarity_threshold?: number): Promise<SemanticSearchResult>;
    getResponses(query: string): Promise<CachedLLMEntry | null>;
    updateAccessStats(query: string): Promise<void>;
}
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