const admin = require('firebase-admin');
const cleanUpRoom = require('./cleanUpRoom');

const timeDiff = (ds1, ds2) => {
  const d1 = new Date(ds1);
  const d2 = new Date(ds2);
  var diff = (d2.getTime() - d1.getTime()) / 1000;
  diff /= 60 * 60;
  return Math.abs(Math.round(diff));
};

module.exports = async (req, res) => {
  const startedTime = new Date();
  res.status(200).send({message:'Started processing'});
  const roomList = await admin
    .firestore()
    .collection('rooms')
    .listDocuments()
    .then((rL) => rL)
    .catch((err) => {
      console.error(
        `Failed to run auto clean up (get room list) @ ${new Date().toLocaleTimeString()}`,
        err
      );
    });
  roomList.forEach((roomRef) => {
    roomRef
      .get()
      .then(async (roomSnap) => {
        if (
          // MORE THAN 24 HOURS AND NOT IN USE
          (timeDiff(roomSnap.createTime.toDate(), startedTime) >= 24 &&
            timeDiff(roomSnap.updateTime.toDate(), startedTime) >= 4) ||
          // LESS THAN 24 HOURS BUT NOT IN USE
          timeDiff(roomSnap.updateTime.toDate(), startedTime) >= 12
        ) {
          await cleanUpRoom(roomSnap.id);
          console.info(`Deleted room ${roomSnap.id} from auto cleanup`);
        }
        return;
      })
      .catch((err) => {
        console.error(
          `Failed to run auto clean up (get room snap) @ ${new Date().toLocaleTimeString()}`,
          err
        );
      });
  });
  return;
};