import type { Data } from './types.js';
import type { TranslationInfo } from './interfaces.js';
/**
 * Extracts the detected source language from translation data
 *
 * Attempts to find the language code from multiple possible locations in the data structure,
 * then maps it to the internal language code format.
 *
 * @param data - Raw translation data from Google Translate API
 * @returns The detected source language code or undefined if not found
 */
export declare const detected: ([source, target, detected, extra]: Data) => TranslationInfo["detectedSource"];
/**
 * Extracts typo correction information from translation data
 *
 * @param data - Raw translation data from Google Translate API
 * @returns The typo correction text or undefined if no typo correction exists
 */
export declare const typo: ([source]: Data) => TranslationInfo["typo"];
/**
 * Functions for extracting pronunciation information from translation data
 */
export declare const pronunciation: {
    /**
     * Extracts the pronunciation for the query text
     *
     * @param data - Raw translation data from Google Translate API
     * @returns The query pronunciation or undefined if not available
     */
    query: ([source]: Data) => TranslationInfo["pronunciation"]["query"];
    /**
     * Extracts the pronunciation for the translated text
     *
     * @param data - Raw translation data from Google Translate API
     * @returns The translation pronunciation or undefined if not available
     */
    translation: ([, target]: Data) => TranslationInfo["pronunciation"]["translation"];
};
/**
 * Collection of functions for extracting different types of lists from translation data
 */
export declare const list: {
    /**
     * Extracts word definitions grouped by type (e.g., noun, verb)
     *
     * @param data - Raw translation data from Google Translate API
     * @returns Array of definition groups with their types and definition lists
     */
    definitions: ({ 3: extra }: Data) => TranslationInfo["definitions"];
    /**
     * Extracts example sentences using the translated term
     *
     * @param data - Raw translation data from Google Translate API
     * @returns Array of example sentences
     */
    examples: ({ 3: extra }: Data) => TranslationInfo["examples"];
    /**
     * Extracts words with similar meaning to the query
     *
     * @param data - Raw translation data from Google Translate API
     * @returns Array of similar words
     */
    similar: ({ 3: extra }: Data) => TranslationInfo["similar"];
    /**
     * Extracts additional translations grouped by type (e.g., noun, verb)
     *
     * Includes word frequency information where 1 is most frequent and 4 is least frequent.
     *
     * @param data - Raw translation data from Google Translate API
     * @returns Array of translation groups with their types and word lists
     */
    translations: ({ 3: extra }: Data) => TranslationInfo["extraTranslations"];
};
/**
 * Type for objects that can be filtered for undefined values
 */
type GenericObject<T> = {
    [k: string]: T;
} | Array<T>;
/**
 * Recursively filters out undefined values from an object or array
 *
 * This function helps create cleaner output data by removing all undefined
 * fields that would otherwise clutter the result.
 *
 * @param obj - Object or array to process
 * @returns A new object or array with all undefined values removed
 */
export declare const undefinedFields: <T extends GenericObject<V | undefined>, V>(obj: T) => T;
export {};