import { NextApiRequest, NextApiResponse } from "next";
import { getAuth, signInWithEmailAndPassword } from "firebase/auth";
import { app } from "@/firebase";
import { sessionOptions } from "@/lib/session";
import { withIronSessionApiRoute } from "iron-session/next";
import { User } from "@/interfaces/user";
import { getFirestore, getDoc, doc } from "firebase/firestore";

const auth = getAuth(app);
const db = getFirestore(app);

export default withIronSessionApiRoute(login, sessionOptions);

async function login(req: NextApiRequest, res: NextApiResponse) {
  const { email, password } = req.body as { email: string; password: string };

  signInWithEmailAndPassword(auth, email.toLowerCase(), password)
    .then(async (userCredentials) => {
      const userId = userCredentials.user.uid;

      const docUser = await getDoc(doc(db, "users", userId));
      if (!docUser.exists()) {
        res.status(401).json({ error: 401, message: "User does not exist!" });
        return;
      }

      const user = docUser.data() as User;

      req.session.user = { ...user, id: userId };
      await req.session.save();

      res.status(200).json({ user: { ...user, id: userId } });
    })
    .catch((error) => {
      console.log(error);
      res.status(401).json({ error });
    });
}