import { Request, Response } from 'express';
import { DyNTS_SingletonService } from '../../../_services/base/singleton.service';
/**
 * OAuth2 Control Service implementation
 *
 * This service handles OAuth2 specific business logic and token management
 *
 * @example
 * const oauth2Service = DyNTS_OAuth2_ControlService.getInstance();
 * await oauth2Service.handleAuthorizationRequest(req, res);
 */
export declare class DyNTS_OAuth2_ControlService extends DyNTS_SingletonService {
    static getInstance(): DyNTS_OAuth2_ControlService;
    readonly serviceName: string;
    private readonly authService;
    private readonly authorizationCodes;
    private readonly accessTokens;
    private readonly refreshTokens;
    private readonly clients;
    private readonly users;
    /**
     * Handles the OAuth2 authorization request
     * @param req Express Request object
     * @param res Express Response object
     */
    handleAuthorizationRequest(req: Request, res: Response): Promise<void>;
    /**
     * Validates if the client is registered and active
     * @param clientId The client ID to validate
     * @returns true if the client is valid
     */
    private isValidClient;
    /**
     * Validates if the redirect URI is registered for the client
     * @param clientId The client ID
     * @param redirectUri The redirect URI to validate
     * @returns true if the redirect URI is valid
     */
    private isValidRedirectUri;
    /**
     * Validates if the scope is allowed for the client
     * @param clientId The client ID
     * @param scope The scope to validate
     * @returns true if the scope is valid
     */
    private isValidScope;
    /**
     * Handles the OAuth2 token request
     * @param req Express Request object
     * @param res Express Response object
     */
    handleTokenRequest(req: Request, res: Response): Promise<void>;
    /**
     * Validates client credentials
     * @param clientId The client ID
     * @param clientSecret The client secret
     * @returns true if the credentials are valid
     */
    private validateClientCredentials;
    /**
     * Handles the OAuth2 userinfo request
     * @param req Express Request object
     * @param res Express Response object
     */
    handleUserInfoRequest(req: Request, res: Response): Promise<void>;
    /**
     * Gets user information from the token
     * @param token The access token
     * @returns The user information object
     */
    private getUserInfoFromToken;
    /**
     * Handles the OAuth2 token revocation request
     * @param req Express Request object
     * @param res Express Response object
     */
    handleTokenRevocation(req: Request, res: Response): Promise<void>;
    /**
     * Generates an authorization code
     * @param clientId The client ID
     * @param scope The requested scope
     * @returns The generated authorization code
     */
    private generateAuthorizationCode;
    /**
     * Generates an access token
     * @param clientId The client ID
     * @param scope The requested scope
     * @returns The generated access token
     */
    private generateAccessToken;
    /**
     * Generates a refresh token
     * @param clientId The client ID
     * @returns The generated refresh token
     */
    private generateRefreshToken;
    /**
     * Gets the access token data
     * @param token The access token
     * @returns The access token data or undefined if not found
     */
    getAccessTokenData(token: string): {
        clientId: string;
        scope: string;
        expiresAt: number;
    } | undefined;
    /**
     * Registers a new OAuth2 client
     * @param clientId The client ID
     * @param clientSecret The client secret
     * @param redirectUris The allowed redirect URIs
     * @param allowedScopes The allowed scopes
     * @returns true if the client was registered successfully
     */
    registerClient(clientId: string, clientSecret: string, redirectUris: string[], allowedScopes: string[]): boolean;
    /**
     * Authenticates a user with username and password
     * @param username The username
     * @param password The password
     * @returns The user's scopes if authentication is successful, undefined otherwise
     */
    private authenticateUser;
    /**
     * Registers a new user
     * @param username The username
     * @param password The password
     * @param scopes The user's scopes
     * @returns true if the user was registered successfully
     */
    registerUser(username: string, password: string, scopes: string[]): boolean;
}
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