const { admin, db } = require("../util/admin");
exports.putTopic = (req, res) => {
  const newTopic = {
    topic: req.body.topic
  };

  admin
    .firestore()
    .collection("topics")
    .add(newTopic)
    .then(doc => {
      const resTopic = newTopic;
      return res.status(200).json(resTopic);
    })
    .catch(err => {
      console.error(err);
      return res.status(500).json({ error: "something is wrong" });
    });
};

exports.getAllTopics = (req, res) => {
  admin
    .firestore()
    .collection("topics")
    .get()
    .then(data => {
      let topics = [];
      data.forEach(function(doc) {
        topics.push({
          topic: doc.data().topic,
          id: doc.id
        });
      });
      return res.status(200).json(topics);
    })
    .catch(err => {
      console.error(err);
      return res.status(500).json({ error: "Failed to fetch all topics." });
    });
};

exports.deleteTopic = (req, res) => {
  const topic = db.doc(`/topics/${req.params.topicId}`);
  topic
    .get()
    .then(doc => {
      if (!doc.exists) {
        return res.status(404).json({ error: "Topic not found" });
      } else {
        return topic.delete();
      }
    })
    .then(() => {
      return res.json({ message: "Topic successfully deleted!" });
    })
    .catch(err => {
      console.error(err);
      return res.status(500).json({ error: "Failed to delete topic." });
    });
};