import type { Cookies } from "@sveltejs/kit";
import { SessionApp, type Session } from "./sessions";
import { UserApp, type User } from "./users";
import { JoseSingleton } from "$lib/utils/jtw-utils";

export class AppData {

    public session: Session
    public user: User

    public constructor(
        session: Session,
        user: User
    ) {
        this.session = session
        this.user = user
    }


    public async toCookie() {

        const signedSession = await JoseSingleton.signObject(this.session)
        const encodedSession = btoa(signedSession)

        return encodedSession
    }

    public static async extractAppDataFromCookies(cookies: Cookies) {

        const encodedSessionToken = cookies.get("session")

        if (!encodedSessionToken) {
            return null
        }

        const decodedSessionToken = atob(encodedSessionToken)

        const sessionToken = await JoseSingleton.verifyObject(decodedSessionToken)

        const session = SessionApp.getSessionFromToken(sessionToken)

        if (!session) {
            return null
        }

        const user = UserApp.getUserFromSession(
            session
        )

        return new AppData(
            session, 
            user
        )
    }

}