const { MongoClient } = require("mongodb");
const task = process.argv[2];

const URI = "mongodb://localhost:27017/";

MongoClient.connect(
  URI,
  {
    useUnifiedTopology: true,
  },
  connected
);

function connected(err, client) {
  if (err) throw err;
  const tasks = client.db("tasklist").collection("tasks");

  if (task) {
    addTask(client, tasks);
  } else {
    listTasks(client, tasks);
  }
}

function addTask(client, tasks) {
  tasks.insertOne(
    {
      task: task,
    },
    (err) => {
      if (err) throw err;
      console.log("New Task: ", task);
      listTasks(client, tasks);
    }
  );
}

function listTasks(client, tasks) {
  tasks.find().each((err, doc) => {
    if (err) throw err;
    if (!doc) {
      client.close();
      return;
    }
    console.log(doc);
  });
}