const admin = require('firebase-admin');

module.exports = async (req, res) => {
  const { player, roomId, uid, showChanged, userName } = JSON.parse(req.body);
  const statusString =
    player.status === 'PLAYING'
      ? 'started playing from'
      : player.status === 'PAUSED'
      ? 'paused at'
      : player.status === 'NOT_PLAYING'
      ? 'stopped at'
      : 'is at';
  const timeString =
    player.time > 3600
      ? new Date(player.time * 1000).toISOString().substr(11, 8)
      : new Date(player.time * 1000).toISOString().substr(14, 5);
  const [roomExists, roomData] = await admin
    .firestore()
    .collection('rooms')
    .doc(roomId)
    .get()
    .then((docSnap) => [docSnap.exists, docSnap.data()]);
  if (!roomExists) return res.status(404).send({ message: 'Party not found.' });
  const userExists = await admin
    .firestore()
    .collection('rooms')
    .doc(roomId)
    .collection('users')
    .doc(uid)
    .get()
    .then((userSnap) => userSnap.exists);
  if (userExists) {
    if (showChanged === true) {
      await admin
        .firestore()
        .collection('rooms')
        .doc(roomId)
        .collection('messages')
        .add({
          uid: '<system>',
          name: '',
          text: `${userName} changed \n${player.showName ? 'to ' + player.showName : ''}`,
          time: new Date(),
        });
    }
    if (roomData.status !== player.status) {
      await admin
        .firestore()
        .collection('rooms')
        .doc(roomId)
        .update({
          player,
        })
        .catch((err) => {
          console.error(`Failed to update player : \n\t Room: ${roomId} \n\t ${uid}`, err);
          res.status(500).send({ message: "Uh oh party could't be synced", err });
        });
      await admin
        .firestore()
        .collection('rooms')
        .doc(roomId)
        .collection('messages')
        .add({
          uid: '<system>',
          name: '',
          text: `${userName} ${statusString} ${timeString}`,
          time: new Date(),
        })
        .catch((err) => {
          console.error(
            `Failed to add system update player message : \n\t Room: ${roomId} \n\t ${uid}`,
            err
          );
        });
      return res.status(200).send({ message: 'Synced party player' });
    } else {
      return res.status(208).send({ message: 'Player already up to date' });
    }
  } else {
    return res.status(401).send({ message: 'Not in room to sync' });
  }
};