import { MobileNumberValidationResult } from './mobile-number-validation-result';
import { ILogger } from '../logging/i-logger';
import { TypingDirection } from './typing-direction';
/**
 * Options for the Nigerian Mobile Number Validator
 */
export interface ValidatorOptions {
    /**
     * Logger instance to use for logging
     */
    logger?: ILogger;
    /**
     * Maximum number of validations per minute (0 = unlimited)
     */
    rateLimit?: number;
}
/**
 * This class validates Nigerian mobile numbers in strict compliance with the
 * official Nigerian National Numbering Plan.
 *
 * - Numbering plan last updated: March 2025
 */
export declare class NigerianMobileNumberValidator {
    private readonly emitter;
    private readonly mobileNumberingPlan;
    private readonly validationTriggeringFlags;
    private readonly logger;
    private readonly rateLimiter?;
    private currentTypingDirection;
    /**
     * Create a new Nigerian Mobile Number Validator
     *
     * @param options Validator options
     */
    constructor(options?: ValidatorOptions);
    /**
     * Register a listener for validation results
     *
     * @param callback Function to call with validation results
     * @returns Function to remove the listener
     */
    onValidationResult(callback: (result: MobileNumberValidationResult) => void): () => void;
    /**
     * Publish a validation result and emit it to listeners
     */
    private publishValidationResult;
    /**
     * Updates internal flags after validation to help determine
     * when to trigger validation on future input.
     */
    private updateValidationTriggeringFlags;
    /**
     * Check if validation is allowed based on rate limiting
     */
    private checkHasExceededRateLimit;
    /**
     * Determines if there are enough digits to perform validation
     */
    private areThereEnoughDigitsToValidate;
    /**
     * Sanitize user input by removing spaces, plus signs, and fixing common errors
     */
    static sanitizeUserProvidedMobileNumber(userProvidedDigits: string): string;
    private set usersTypingDirection(value);
    /**
     * Gets an enum representing the direction in which the user is currently typing.
     */
    get usersTypingDirection(): TypingDirection;
    /**
     * Truthy method to quickly check if a phone number is not a Nigerian mobile number.
     * This is a fast pre-validation step to reject obviously foreign numbers.
     *
     * @param sanitizedUserInput The phone number to check
     * @returns true if the number looks foreign, false if it could be Nigerian
     */
    private isForeignNumber;
    /**
     * Validates a Nigerian mobile number in strict compliance with the official
     * Nigerian National Numbering Plan.
     *
     * @param userProvidedDigits The characters input by the user representing their mobile number
     * @returns A MobileNumberValidationResult representing the validation result
     */
    validate(userProvidedDigits?: string): MobileNumberValidationResult;
    /**
     * Clean up resources
     */
    dispose(): void;
    /**
     * Represents a mobile phone number.
     */
    private static readonly MobileNumber;
}