import { User, JSONWebToken, BioSample, Credential } from '@digitalpersona/core';
import { IAuthService } from '@digitalpersona/services';
import { Authenticator } from '../../private';

/**
 * Face authentication API.
 * Face credential supports authentication. Identification is currently not supported by the server.
 */
export class FaceAuth extends Authenticator
{
    /** Constructs a new face authentication API object.
     * @param authService - an {@link AuthService|authentication service client} connected to the server.
     */
    constructor(authService: IAuthService){
        super(authService);
    }

    /** Authenticates the user using their face images.
     * @param identity - a {@link User |username} or a JSON Web Token.
     * @param samples - a collection of biometric samples with face images.
     * @returns a promise to return a JSON Web Token containing a claim (`crd`) showing the fact
     * a face was used.
     * Will reject if authentication fails.
     * @remarks
     * If the `identity` parameter is a user name, a new token will be created.
     * If the `identity` parameter is a JSON Web Token, an updated token will be returned.
     */
    public authenticate(
        identity: User|JSONWebToken,
        samples: BioSample[],
    ): Promise<JSONWebToken>
    {
        return super._authenticate(identity,  new Credential(Credential.Face, samples));
    }

    /** Currently face identification is not supported by the server. */
    public identify(
        samples: BioSample[],
    ): Promise<JSONWebToken>
    {
        return super._identify(new Credential(Credential.Face, samples));
    }
}