import type { AccountInfo, AuthenticationResult, PublicClientApplication } from '@azure/msal-node';
import type { IAuthProvider } from './AuthProvider.interface.js';
/**
 * Implementation of the authentication provider for the Fusion MSAL Node module.
 *
 * Implements {@link IAuthProvider} and provides methods for managing authentication
 * and token acquisition using the MSAL (Microsoft Authentication Library) for Node.js.
 *
 * This implementation assumes the user is already logged in and does not support
 * triggering interactive login or logout flows. The `login` method will always throw, and `logout`
 * only clears the token cache.
 *
 * @see AuthProviderInteractive For interactive login/logout support (user-driven authentication flows).
 * @see AuthProviderTokenOnly For scenarios where a pre-obtained token is used (automation, CI/CD, etc).
 *
 * Developers extending this class can add support for additional authentication flows or modify token
 * acquisition logic. Ensure that any changes remain consistent with the interface contract.
 */
export declare class AuthProvider implements IAuthProvider {
    protected _client: PublicClientApplication;
    /**
     * @param _client - The MSAL `PublicClientApplication` instance used for token operations.
     */
    constructor(_client: PublicClientApplication);
    /**
     * Retrieves the first account from the list of all accounts available in the MSAL client.
     *
     * @returns A promise that resolves to the first `AccountInfo` object if available, or `null` if no accounts exist.
     */
    getAccount(): Promise<AccountInfo | null>;
    /**
     * Acquires an access token for the specified scopes.
     *
     * @param options - An object containing the options for acquiring the token.
     * @param options.request.scopes - An array of strings representing the scopes for which the access token is requested.
     * @returns A promise that resolves to the acquired access token as a string.
     * @throws An error if the token acquisition process fails.
     */
    acquireAccessToken(options: {
        request: {
            scopes: string[];
        };
    }): Promise<string>;
    /**
     * Initiates the login process with the specified options.
     *
     * @param _options - An object containing the scopes required for authentication.
     * @returns A promise that resolves to an `AuthenticationResult` upon successful login.
     * @throws `AuthServerError` - Always throws this error as login is not supported in this implementation.
     *
     * @remarks
     * This method is not supported and is intended to be overridden by `AuthProviderInteractive`.
     */
    login(_options: {
        request: {
            scopes: string[];
        };
    }): Promise<AuthenticationResult>;
    /**
     * Logs out the user by clearing the token cache and removing all accounts.
     *
     * This method retrieves all accounts from the token cache and removes them
     * individually. Afterward, it clears the entire cache to ensure no residual
     * authentication data remains.
     *
     * @returns A promise that resolves when the logout process is complete.
     */
    logout(): Promise<void>;
    /**
     * Acquires an authentication token for the specified scopes.
     *
     * This method first attempts to acquire a token silently using the accounts
     * available in the token cache. If no accounts are found and interactive login
     * is allowed, it initiates an interactive login flow. If interactive login is
     * not allowed and no accounts are found, an error is thrown.
     *
     * @param scopes - An array of strings representing the scopes for which the token is requested.
     * @param options - Optional parameters for token acquisition.
     * @param options.interactive - A boolean indicating whether interactive login is allowed
     *                               if no accounts are found in the cache. Defaults to `false`.
     * @returns A promise that resolves to an `AuthenticationResult` containing the acquired token.
     * @throws {@link NoAccountsError} If no accounts are found in the cache and interactive login is not allowed.
     * @throws {@link SilentTokenAcquisitionError} If an error occurs during silent token acquisition.
     */
    acquireToken(options: {
        request: {
            scopes: string[];
        };
    }): Promise<AuthenticationResult>;
}