import base64url from 'base64url';

interface Credentials {
    challenge: string;
    user: {
        displayName: string;
        id: string;
        name: string;
    };
}

export const createCredentials = ({ challenge, user: { id, name, displayName } }: Credentials) =>
    // https://chromium.googlesource.com/chromium/src/+/master/content/browser/webauth/uv_preferred.md
    navigator.credentials.create({
        publicKey: {
            rp: {
                name: 'Todos',
            },
            user: {
                id: base64url.toBuffer(id),
                name,
                displayName,
            },
            challenge: base64url.toBuffer(challenge),
            pubKeyCredParams: [
                {
                    type: 'public-key',
                    alg: -7, // "ES256" IANA COSE Algorithms registry
                }
            ],
            //attestation: 'none',
            authenticatorSelection: {
                userVerification: 'discouraged',
                //authenticatorAttachment: "platform",
                residentKey: 'required',
            },
            //extensions: {
            //  credProps: true
            //}
        },
    });