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

module.exports = async (req, res) => {
  console.info(
    `[START]\tWEBHOOKS/Conference End\tID:${req.body.conference.confId}\tParty:${req.body.conference.confAlias}`
  );
  // MAKE SURE CORRECT EVENT TYPE
  if (req.body.eventType === "Conference.Ended") {
    // MAKE SURE IT'S NOT A DUPLICATE FROM CREATE CONFLICT
    if (req.body.participants.length > 0) {
      // MAKE SURE ELIGIBLE FOR DELETE
      if (req.body.confAlias.startsWith("AUTODELETE_")) {
        const partyName = req.body.confAlias.replace(/AUTODELETE_/, "");
        const existingConference = await admin
          .firestore()
          .collection("rooms")
          .doc(partyName)
          .get()
          .then((snap) => (snap.exists ? snap.data().conference : null));
        // MAKE SURE EXISTS AND HAS NOT BEEN REPLACED
        if (
          existingConference &&
          existingConference._id === req.body.conference.confId
        ) {
          // REMOVE CONFERENCE DETAILS
          await admin
            .firestore()
            .collection("rooms")
            .doc(partyName)
            .update({ conference: admin.firestore.FieldValue.delete() })
            .then(() => {
              console.info(
                `[DONE]\tWEBHOOKS/Conference End\tID:${req.body.conference.confId}\tParty:${req.body.conference.confAlias}`
              );
              return;
            })
            .catch((err) => {
              console.error(
                `[ERROR]\tWEBHOOKS/Conference End/Firebase Error\tID:${
                  req.body.conference.confId
                }\tParty:${
                  req.body.conference.confAlias
                }\tError:${JSON.stringify(err)}`
              );
            });
        } else {
          console.info(
            `[DONE]\tWEBHOOKS/Conference End/Conference Was Already Replaced\tID:${req.body.conference.confId}\tParty:${req.body.conference.confAlias}`
          );
        }
        res.status(200).send({ message: "Processed conference end" });
      } else {
        console.info(
          `[DONE]\tWEBHOOKS/Conference End/Not Eligible For Autodelete\tID:${req.body.conference.confId}\tParty:${req.body.conference.confAlias}`
        );
        res.status(200).send({ message: "Processed conference end" });
      }
    } else {
      console.info(
        `[DONE]\tWEBHOOKS/Conference End/End Of Duplicate Conference\tID:${req.body.conference.confId}\tParty:${req.body.conference.confAlias}`
      );
    }
  } else {
    console.error(
      `[ERROR]\tWEBHOOKS/Conference End/Wrong Event Type\tID:${req.body.conference.confId}\tParty:${req.body.conference.confAlias}`
    );
    res.status(400).send({ message: "Wrong event type" });
  }
  return;
};