/**
 * SearchTypes — SearchEngine 共享类型定义
 *
 * 从 SearchEngine.ts 提取的所有接口和类型，
 * 供 SearchEngine、FieldWeightedScorer、BM25Scorer 及测试文件独立消费。
 *
 * @module SearchTypes
 */
/** Internal scorer document representation */
export interface ScorerDocument {
    id: string;
    tokens: string[];
    tokenFreq: Record<string, number>;
    length: number;
    meta: Record<string, unknown>;
}
/** Scorer search result */
export interface ScorerResult {
    id: string;
    score: number;
    meta: Record<string, unknown>;
}
/** @deprecated Use ScorerDocument */
export type BM25Document = ScorerDocument;
/** @deprecated Use ScorerResult */
export type BM25SearchResult = ScorerResult;
/**
 * Scorer 通用接口 — FieldWeightedScorer（默认）与 BM25Scorer 共同实现
 *
 * SearchEngine 通过此接口与具体评分器解耦，可在运行时切换。
 */
export interface Scorer {
    totalDocs: number;
    avgLength: number;
    docFreq: Record<string, number>;
    documents: ({
        id: string;
    } | null)[];
    addDocument(id: string, text: string, meta: Record<string, unknown>): void;
    removeDocument(id: string): boolean;
    updateDocument(id: string, text: string, meta: Record<string, unknown>): void;
    hasDocument(id: string): boolean;
    search(query: string, limit?: number): ScorerResult[];
    clear(): void;
}
/** Meta structure produced by _buildDocMeta */
export interface DocMeta {
    type: string;
    title: string;
    trigger: string;
    status: string | undefined;
    knowledgeType: string | undefined;
    kind: string;
    language: string;
    category: string;
    updatedAt: string | null;
    createdAt: string | null;
    difficulty: string;
    tags: string[];
    usageCount: number;
    authorityScore: number;
    qualityScore: number;
    [key: string]: unknown;
}
/** @deprecated Use DocMeta */
export type BM25DocMeta = DocMeta;
/** Unified search result item flowing through the ranking pipeline */
export interface SearchResultItem {
    id: string;
    title?: string;
    description?: string;
    trigger?: string;
    type?: string;
    kind?: string;
    status?: string;
    language?: string;
    category?: string;
    score?: number;
    content?: string;
    code?: string;
    headers?: string;
    moduleName?: string;
    knowledgeType?: string;
    qualityScore?: number;
    usageCount?: number;
    authorityScore?: number;
    tags?: string[] | string;
    difficulty?: string;
    updatedAt?: string | null;
    createdAt?: string | null;
    whenClause?: string;
    doClause?: string;
    rankerScore?: number;
    coarseScore?: number;
    contextScore?: number;
    recallScore?: number;
    [key: string]: unknown;
}
/** Database row from knowledge_entries table */
export interface DbRow {
    id: string;
    title?: string;
    description?: string;
    language?: string;
    category?: string;
    knowledgeType?: string;
    kind?: string;
    content?: string;
    lifecycle?: string;
    tags?: string;
    trigger?: string;
    difficulty?: string;
    quality?: string;
    stats?: string;
    updatedAt?: string;
    createdAt?: string;
    status?: string;
    headers?: string;
    moduleName?: string;
    whenClause?: string;
    doClause?: string;
    [key: string]: unknown;
}
/** Search method options */
export interface SearchOptions {
    type?: string;
    limit?: number;
    mode?: string;
    context?: RankingContext;
    rank?: boolean;
    groupByKind?: boolean;
    useAI?: boolean;
    [key: string]: unknown;
}
/** Context for ranking pipeline */
export interface RankingContext {
    sessionHistory?: Array<{
        content?: string;
        rawInput?: string;
    }>;
    language?: string;
    intent?: string;
    [key: string]: unknown;
}
/** Search response envelope */
export interface SearchResponse {
    items: SearchResultItem[];
    total: number;
    query: string;
    mode?: string;
    type?: string;
    ranked?: boolean;
    byKind?: Record<string, SearchResultItem[]>;
}
/** Duck-typed database connection (better-sqlite3 style) */
export interface SearchDb {
    prepare(sql: string): {
        all(...args: unknown[]): DbRow[];
    };
}
/** AI provider with embedding capability */
export interface SearchAiProvider {
    embed(text: string): Promise<number[]>;
}
/** Vector store for semantic search */
export interface SearchVectorStore {
    query(embedding: number[], limit: number): Promise<VectorHit[]>;
    hybridSearch?(embedding: number[], query: string, options: {
        topK?: number;
    }): Promise<VectorHit[]>;
}
/** Vector search hit */
export interface VectorHit {
    id: string;
    similarity?: number;
    score?: number;
    content?: string;
    metadata?: Record<string, unknown>;
    item?: {
        id: string;
        content?: string;
        metadata?: Record<string, unknown>;
    };
    [key: string]: unknown;
}
/** Hybrid retriever for RRF fusion */
export interface SearchHybridRetriever {
    search(query: string, queryEmbedding: number[], options: {
        topK?: number;
        alpha?: number;
        sparseSearchFn?: () => SearchResultItem[];
    }): Promise<RrfHit[]>;
}
/** Single RRF fusion hit */
export interface RrfHit {
    id: string;
    score: number;
    data?: {
        item?: Record<string, unknown>;
        [key: string]: unknown;
    };
    [key: string]: unknown;
}
/** Cross-encoder reranker abstraction */
import type { SignalBus } from '../../infrastructure/signal/SignalBus.js';
export interface SearchCrossEncoder {
    rerank(query: string, candidates: SearchResultItem[]): Promise<SearchResultItem[]>;
}
/** SearchEngine constructor options */
export interface SearchEngineOptions {
    aiProvider?: SearchAiProvider | null;
    vectorStore?: SearchVectorStore | null;
    vectorService?: SearchVectorService | null;
    hybridRetriever?: SearchHybridRetriever | null;
    crossEncoderReranker?: SearchCrossEncoder | null;
    signalBus?: SignalBus | null;
    cacheMaxAge?: number;
    fusionRecallWeight?: number;
    fusionSemanticWeight?: number;
    [key: string]: unknown;
}
/**
 * 统一的搜索结果投影类型 — 去除内部排序信号，只保留 Agent/Bridge 可操作字段。
 * 合并自 mcp/search.ts#SlimSearchItem 和 TaskKnowledgeBridge#SlimKnowledgeItem。
 */
export interface SlimSearchResult {
    id: string;
    title: string;
    trigger: string;
    kind: string;
    language: string;
    score: number;
    description: string;
    actionHint?: string;
    /** 知识类型 (code-standard/code-pattern/...) — Bridge 场景需要 */
    knowledgeType?: string;
    /** 已验证的项目来源文件路径（可信度证据链） */
    sourceRefs?: string[];
}
/**
 * 统一投影函数 — 将 SearchResultItem 投影为 SlimSearchResult。
 *
 * 合并了 mcp/search.ts#_slimSearchItem() 和 TaskKnowledgeBridge#_projectItem() 的逻辑：
 * - 去除内部信号 (recallScore, coarseScore, rankerScore, contextScore, content, code...)
 * - description 截断 120 字符
 * - 生成 actionHint (whenClause → doClause)
 *
 * @param item 搜索结果项（来自 SearchEngine）
 * @returns 瘦身后的结果项
 */
export declare function slimSearchResult(item: SearchResultItem): SlimSearchResult;
/** items → byKind 分组（统一实现） */
export declare function groupByKind<T extends {
    kind?: string;
}>(items: T[]): {
    rule: T[];
    pattern: T[];
    fact: T[];
};
/** VectorService abstraction for SearchEngine delegation */
export interface SearchVectorService {
    search(query: string, opts?: {
        topK?: number;
        filter?: Record<string, unknown> | null;
        minScore?: number;
    }): Promise<Array<{
        item: Record<string, unknown>;
        score: number;
    }>>;
    hybridSearch(query: string, opts?: {
        topK?: number;
        alpha?: number;
        sparseSearchFn?: ((q: string, limit: number) => Array<{
            id: string;
            score?: number;
            [key: string]: unknown;
        }>) | null;
    }): Promise<Array<{
        id: string;
        score: number;
        [key: string]: unknown;
    }>>;
}