var admin = require("firebase-admin");

const path = require("path");
require("dotenv").config({
  path: path.resolve(
    process.cwd(),
    `.env.${process.env.NODE_ENV || "development"}`
  ),
});

var serviceAccount = require(process.env.FIREBASE_ADMINSDK_JSON);

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
  databaseURL: process.env.FIREBASE_DATABASE_URL,
});

exports.admin = admin;

exports.sendNotification = (req, res) => {
  var registrationToken =
    "fqIWg8ENDFyrRrMWJ1sItR:APA91bHirdZ05Zo66flMlvala97SMXoiQGwP4oCvMwd-vVrSauD_WoNim3kXHGqyP-bzENjkXwA5icyUAReFbeHn6dIaPcbpcsXuY73-eJAXvZiu1gIsrd1BOsnj3dEMT7Q4F6mTPth1";
  var message = {
    notification: { title: "The Title", body: "The Body" },
    data: {
      jobid: "1234",
    },
    token: registrationToken,
  };

  // Send a message to the device corresponding to the provided
  // registration token.
  admin
    .messaging()
    .send(message)
    .then((response) => {
      // Response is a message ID string.
      console.log("Successfully sent message:", response);
    })
    .catch((error) => {
      console.log("Error sending message:", error);
    });

  res.sendStatus(200);
};

exports.validateFirebaseIdToken = async (req, res, next) => {
  console.log("Check if request is authorized with Firebase ID token");

  if (
    (!req.headers.authorization ||
      !req.headers.authorization.startsWith("Bearer ")) &&
    !(req.cookies && req.cookies.__session)
  ) {
    console.error("Unauthorized attempt. No authorization provided.");
    res.status(403).send("Unauthorized");
    return;
  }

  let idToken;
  if (
    req.headers.authorization &&
    req.headers.authorization.startsWith("Bearer ")
  ) {
    // console.log('Found "Authorization" header');
    // Read the ID Token from the Authorization header.
    idToken = req.headers.authorization.split("Bearer ")[1];
  } else if (req.cookies) {
    //console.log('Found "__session" cookie');
    // Read the ID Token from cookie.
    idToken = req.cookies.__session;
  } else {
    // No cookie
    console.error("Unauthorized attempt. No cookie provided.");

    res.status(403).send("Unauthorized");
    return;
  }

  try {
    const decodedIdToken = await admin.auth().verifyIdToken(idToken);
    //console.log("ID Token correctly decoded", decodedIdToken);
    req.user = decodedIdToken;
    next();
    return;
  } catch (error) {
    console.error("Error while verifying Firebase ID token:", error);
    res.status(403).send("Unauthorized");
    return;
  }
};