declare namespace truecallerjs {
  /**
   * Response object returned by the login function.
   */
  interface LoginResponse {
    status: number;
    message: string;
    domain: string;
    parsedPhoneNumber: number;
    parsedCountryCode: string;
    requestId: string;
    method: string;
    tokenTtl: number;
  }

  /**
   * Logs in to Truecaller.
   *
   * @param phoneNumber - Phone number in international format.
   * @returns A Promise that resolves to the login response containing the requestId used for OTP verification.
   */
  function login(phoneNumber: string): Promise<LoginResponse>;

  /**
   * Verifies a mobile number with OTP.
   *
   * @param phoneNumber - Phone number in international format.
   * @param jsonData - JSON response of the login function.
   * @param otp - 6-digit OTP.
   * @returns A Promise that resolves to a JSON object containing the installationId.
   */
  function verifyOtp(
    phoneNumber: string,
    jsonData: LoginResponse,
    otp: string,
  ): Promise<object>;

  /**
   * Address details.
   */
  interface Address {
    city: string;
    countryCode: string;
    timeZone: string;
    type: string;
  }

  /**
   * Internet address details.
   */
  interface InternetAddress {
    id: string;
    service: string;
    caption: string;
    type: string;
  }

  /**
   * Country details.
   */
  interface CountryDetails {
    name: string;
    native: string;
    phone: number[];
    continent: string;
    capital: string;
    currency: string[];
    languages: string[];
    flag: string;
    flagURL: string;
  }

  /**
   * Data object containing information about a phone number.
   */
  interface Data {
    name?: string;
    altName?: string;
    addresses?: Address[];
    internetAddresses?: InternetAddress[];
  }

  /**
   * Search data object used for searching a phone number.
   */
  interface SearchData {
    number: string;
    countryCode: string;
    installationId: string;
  }

  /**
   * Response data object containing an array of Data objects.
   */
  interface BulkSearchData {
    data: Data[];
  }

  /**
   * Format class for formatting response data.
   */
  class Format {
    constructor(data: BulkSearchData);
    json(color?: boolean): BulkSearchData;
    xml(color?: boolean): string;
    yaml(color?: boolean): string;
    text(color?: boolean, space?: boolean): string;
    getName(): string;
    getAlternateName(): string;
    getAddresses(): Address[];
    getEmailId(): string;
    getCountryDetails(): CountryDetails;
  }

  /**
   * Searches for a phone number on Truecaller.
   *
   * @param searchData - Search data object containing the number, countryCode, and installationId.
   * @returns A Promise that resolves to a Format object containing details of the phone number.
   */
  function search(searchData: SearchData): Promise<Format>;

  /**
   * Performs bulk search for multiple phone numbers on Truecaller.
   *
   * @param phoneNumbers - Phone numbers separated by commas.
   * @param countryCode - Country code to use by default if any phone number is not in E.164 format (international format).
   * @param installationId - 6-digit OTP.
   * @returns A Promise that resolves to a BulkSearchData object containing phone number information in an array.
   */
  function bulkSearch(
    phoneNumbers: string,
    countryCode: string,
    installationId: string,
  ): Promise<BulkSearchData>;
}

export = truecallerjs;