// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
import type { NextApiRequest, NextApiResponse } from "next";
import client from "@/lib/mongodb";
import { withIronSessionApiRoute } from "iron-session/next";
import { sessionOptions } from "@/lib/session";
import { Stat } from "@/interfaces/user";
import { requestUser } from "@/utils/api";
import { UserSolution } from "@/interfaces/exam";

const db = client.db(process.env.MONGODB_DB);

export default withIronSessionApiRoute(handler, sessionOptions);

async function handler(req: NextApiRequest, res: NextApiResponse) {
    if (req.method === "POST") return post(req, res);
}

interface Body {
    solutions: UserSolution[];
    sessionID: string;
}

async function post(req: NextApiRequest, res: NextApiResponse) {
    const user = await requestUser(req, res)
    if (!user) return res.status(401).json({ ok: false });

    const { solutions, sessionID } = req.body as Body;

    const disabledStats = await db.collection("stats").find({ user: user.id, session: sessionID, disabled: true }).toArray();

    await Promise.all(disabledStats.map(async (stat) => {
        const matchingSolution = solutions.find(s => s.exercise === stat.exercise);
        if (matchingSolution) {
            await db.collection("stats").updateOne(
                { id: stat.id },
                { $set: { ...matchingSolution } }
            );
        }
    }));

    return res.status(200).json({ ok: true });
}