/**
 * Copyright © 2023 Nevis Security AG. All rights reserved.
 */

import { Account } from './Account';

/**
 * The object exposing the registration information for an {@link Authenticator}.
 */
export abstract class RegistrationInfo {
	/**
	 * Returns the objects representing the accounts that are registered with this authenticator.
	 *
	 * If an authenticator that is registered for a given username is provided through
	 * {@link AuthenticatorSelector} for registration operations associated with the account
	 * associated with the username, an {@link OperationError} will be returned as a result
	 * of the operation.
	 *
	 * If an authenticator that is not registered for a given username is provided through
	 * {@link AuthenticatorSelector} for authentication operations associated with the account
	 * associated with the username, an {@link OperationError} will be returned as a result
	 * of the operation.
	 */
	abstract registeredAccounts: Array<Account>;

	/**
	 * Alternate constructor that creates a {@link RegistrationInfo} from a json.
	 *
	 * @param json contains the source for instance creation.
	 * @returns a {@link RegistrationInfo} instance.
	 */
	static fromJson(json: any): RegistrationInfo {
		return RegistrationInfoImpl.fromJson(json);
	}

	/**
	 * Returns `true` if the provided user is registered and `false` otherwise.
	 *
	 * @param username the username.
	 * @returns `true` if the provided user is registered and `false` otherwise.
	 */
	abstract isRegistered(username: string): boolean;
}

class RegistrationInfoImpl extends RegistrationInfo {
	registeredAccounts: Array<Account>;

	private constructor(registeredAccounts: Array<Account>) {
		super();
		this.registeredAccounts = registeredAccounts;
	}

	static fromJson(json: any): RegistrationInfoImpl {
		const registeredAccounts = json.registeredAccounts;
		const accounts = registeredAccounts.map((element: any) => Account.fromJson(element));

		return new RegistrationInfoImpl(accounts);
	}

	isRegistered(username: string): boolean {
		return (
			this.registeredAccounts.filter((account) => {
				return account.username === username;
			}).length > 0
		);
	}
}