// Imports
import { Router } from "express";
import bearerTokenMiddleware from "express-bearer-token";
import { ERR, VERB } from "../../util/logging.js";

// Constants
const { MCL_CAIRO_URL } = process.env;
const cairoAuthMiddleware = Router();

const cairoAuthenticate = async (token) => {
  const config = { headers: { Authorization: `Bearer ${token}` } };
  return fetch(`${MCL_CAIRO_URL}/api/user/info`, config).then(async (res) => {
    if (res.status >= 300) {
      const errorMessage = await res
        .json()
        .then((data) => JSON.stringify(data))
        .catch(() => res.statusText);
      throw Error(
        `Could not authenticate with user, receieved message: ${errorMessage}`,
      );
    }

    return res.json();
  });
};

// Middleware
const cairoAuthHandler = (req, res, next) => {
  if (!req.token) return res.status(401).send("Cairo auth required!");
  cairoAuthenticate(req.token)
    .then((authData) => {
      console.log(authData);
      if (!authData.id)
        throw Error(`Cairo didn't return the expected data! ${authData.id}`);
      req.id = authData.id;
    })
    .then(() => next())
    .catch((err) => {
      ERR("AUTH", err.response ? err.response.data : err.message);
      if (!err.response) return res.status(500).send(`Auth failure ${err}`);
      return res.status(err.response.status).send(err.response.data);
    });
};

cairoAuthMiddleware.use([bearerTokenMiddleware(), cairoAuthHandler]);

export default cairoAuthMiddleware;