import type { AuthenticationResult } from '@azure/msal-node';
/**
 * Interface for authentication providers in the Fusion MSAL Node module.
 *
 * Provides a unified API for authentication operations, including acquiring access tokens.
 * The actual behavior of each method depends on the configured authentication mode (interactive, silent, or token-only).
 *
 * When accessing `appModules.msal.auth`, you will interact with this interface to:
 * - Acquire Azure AD access tokens for specified scopes
 *
 * All methods are asynchronous and return Promises. See method documentation for details.
 *
 * @remarks
 * This provider assumes the user is already logged in. To support login and logout operations, the module must be configured in interactive mode. In other modes, `login` and `logout` are present for compatibility but will be no-ops or throw if called.
 *
 * @see IAuthProviderInteractive for interactive login/logout support
 */
export interface IAuthProvider {
    /**
     * This method is present for compatibility but will never trigger a user login flow unless interactive mode is configured.
     *
     * @param options - An object specifying the required scopes for authentication.
     * @returns A Promise that will always reject or be a no-op, depending on implementation.
     *
     * @remarks
     * This method is not supported and should not be used to initiate login unless interactive mode is enabled.
     */
    login(options: {
        request: {
            scopes: string[];
        };
    }): Promise<AuthenticationResult>;
    /**
     * This method is present for compatibility but will never trigger a user logout flow unless interactive mode is configured.
     *
     * @returns A Promise that will always resolve immediately or be a no-op, depending on implementation.
     *
     * @remarks
     * This method is not supported and should not be used to initiate logout unless interactive mode is enabled.
     */
    logout(): Promise<void>;
    /**
     * Acquires an access token for the specified scopes.
     *
     * @param options - An object specifying the required scopes and an optional `interactive` flag.
     *   - `request.scopes`: The scopes for which the token is requested.
     *   - `interactive`: If true, may trigger an interactive login if silent acquisition fails (not supported unless interactive mode is enabled).
     * @returns A Promise that resolves to a string representing the acquired access token.
     *
     * @remarks
     * This is the primary method for obtaining tokens for API calls or resource access.
     */
    acquireAccessToken(options: {
        request: {
            scopes: string[];
        };
        interactive?: boolean;
    }): Promise<string>;
}