import jwt, { JwtPayload } from 'jsonwebtoken';

export interface TokenProps {
    aud?: string;
    exp?: number | Date;
    iss?: string;
    sub: string | null;
    [key: string]: any;
}

export type SignProps = string | TokenProps | void;

export const sign = (props: SignProps) => {
    const today = new Date();
    const { sub = null, ...rest }: TokenProps = typeof props === 'string' || typeof props === 'undefined' ? { sub: props || null } : props;
    let exp = rest.exp; 
    if (!exp) {
        exp = new Date(today);
        exp.setDate(today.getDate() + parseInt(process.env.JWT_DAYS_VALID as string));
        exp = exp.getTime() / 1000;
    }
    return jwt.sign({
        aud: rest.aud || process.env.JWT_AUDIENCE,
        exp,
        iat: today.getTime(),
        iss: rest.iss || process.env.JWT_ISSUER,
        sub,
    }, process.env.JWT_SECRET || 'secret');
};

export const verify = (token: string) => jwt.verify(token, process.env.JWT_SECRET || 'secret');