import { DirectRelation, DirectRelationMap, SourceRecord, ThroughRelation, ThroughRelationMap } from "../types.js";
/**
 * Builds a map from foreign key values to parent objects.
 *
 * Useful for indexing related records by a specified field.
 *
 * @param data - Array of objects to index.
 * @param foreignKeyPath - Dot-notated path to the key field.
 * @returns A map of key to array of matching objects.
 */
export declare function buildForeignKeyMap(data: SourceRecord[], foreignKeyPath: string): Map<string, SourceRecord[]>;
/**
 * Finds map entries whose keys partially match a keyword.
 *
 * @param map - A map to search.
 * @param keyword - Keyword to match.
 * @param options - Optional case-insensitive matching.
 * @returns Matching values.
 */
export declare function findEntriesByPartialKey<K extends string | undefined, V>(map: Map<K, V>, keyword: string, options?: {
    caseInsensitive?: boolean;
}): V[];
/**
 * Resolves a direct relation (e.g., hasOne, hasMany) for a given row.
 *
 * @param row - The source object.
 * @param rel - Relation metadata (including localKey and foreignKey).
 * @param foreignData - The target dataset to match against.
 * @param foreignMapOpt - (optional) Pre-built foreign key map for performance.
 * @returns Related object(s) or null.
 */
export declare function resolveDirectRelation(row: any, rel: DirectRelation, foreignData: SourceRecord[], foreignMapOpt?: DirectRelationMap["foreignMap"]): SourceRecord | SourceRecord[] | null;
/**
 * Resolves a through-relation (e.g., hasOneThrough, hasManyThrough).
 *
 * @param row - The source object.
 * @param rel - Relation metadata including through and target keys.
 * @param throughData - The intermediate dataset.
 * @param targetData - The final related dataset.
 * @param targetMapOpt - (optional) Pre-built target key map for performance.
 * @returns Related object(s) or null.
 */
export declare function resolveThroughRelation(row: any, rel: ThroughRelation, throughData: SourceRecord[], targetData: SourceRecord[], targetMapOpt?: ThroughRelationMap["targetMap"], throughMapOpt?: ThroughRelationMap["targetMap"]): SourceRecord | SourceRecord[] | null;