import { IReferralCode, DiscountType } from '../models/ReferralCode';
export interface CreateReferralCodeInput {
    clientId: string;
    discountType: DiscountType;
    discountValue: number;
    usageLimit?: number;
    codePrefix?: string;
    codeLength?: number;
    code?: string;
}
export interface VerifyReferralCodeResult {
    isValid: boolean;
    referralCode?: IReferralCode;
    error?: string;
}
export interface ServiceResponse<T> {
    success: boolean;
    data?: T;
    error?: string;
    message?: string;
}
/**
 * Service class for managing referral codes
 */
export declare class ReferralService {
    /**
     * Generates a unique referral code with client prefix and saves it to MongoDB
     * @param input - Referral code creation parameters
     * @returns ServiceResponse with the created referral code or error
     */
    static createReferralCode(input: CreateReferralCodeInput): Promise<ServiceResponse<IReferralCode>>;
    /**
     * Verifies if a referral code is valid
     * Checks active status, usage limit, and returns the referral code if valid
     * @param code - The referral code to verify
     * @returns VerifyReferralCodeResult with validation status
     */
    static verifyReferralCode(code: string): Promise<VerifyReferralCodeResult>;
    /**
     * Gets a referral code by code string
     * @param code - The referral code to retrieve
     * @returns ServiceResponse with the referral code or error
     */
    static getReferralCodeByCode(code: string): Promise<ServiceResponse<IReferralCode>>;
    /**
     * Gets all referral codes for a specific client
     * @param clientId - The client ID
     * @returns ServiceResponse with array of referral codes
     */
    static getReferralCodesByClientId(clientId: string): Promise<ServiceResponse<IReferralCode[]>>;
    /**
     * Increments the usage count of a referral code
     * @param code - The referral code to increment
     * @returns ServiceResponse with updated referral code
     */
    static incrementUsageCount(code: string): Promise<ServiceResponse<IReferralCode>>;
    /**
     * Deactivates a referral code
     * @param code - The referral code to deactivate
     * @returns ServiceResponse with updated referral code
     */
    static deactivateReferralCode(code: string): Promise<ServiceResponse<IReferralCode>>;
}