// SCHEMAS & MODELS
let UserSchema = new Schema({
  title: { type: String, required: true },
  firstName: { type: String, required: true },
  lastName: { type: String, required: true },
  username: { type: String, required: true, unique: true },
  avatar: String,
  email: { type: String, required: true },
  dob: String,
  password: { type: String, required: true },
  createdAt: Date,
  accounts: [{ type: Schema.Types.ObjectId, ref: 'Account' }] // --> this is what I want to fill
});

let AccountSchema = new Schema({
  createdAt: Date,
  accountNumber: { type: Number, required: true },
  balance: Number,
  daysLeft: Number,
  nextMonthPayment: Number,
  paymentType: String,
  currentPlan: {
    name: { type: String, required: true },
    usage: {
      used: Number,
      left: Number,
      total: Number,
      meta: {
        trafficData: [{
          date: Date,
          amount: Number,
          download: Number,
          upload: Number
        }],
      }
    }
  },
  user: { type: Schema.Types.ObjectId, ref: 'User' }
});

User = mongoose.model('User', UserSchema);
Account = mongoose.model('Account', AccountSchema);
// end: SCHEMAS & MODELS

// POST
router.post('/accounts', (req, res) => {
  user = new User({
    title: 'Ms',
    firstName: 'Paula',
    lastName: 'Testerson',
    username: '@paulatest',
    avatar: '',
    email: 'paula.test@emailtest.com',
    dob: '01 January 1989',
    password: 'test123',
    createdAt: Date.now()
  });

  account = new Account({
    createdAt: Date.now(),
    accountNumber: 7651234,
    balance: 91.75,
    daysLeft: 23,
    nextMonthPayment: 19.57,
    paymentType: 'debit card',
    currentPlan: {
      name: 'Fast Furious',
      usage: {
        used: 10356,
        left: 89644,
        total: 100000,
        meta: {
          trafficData: [{
            date: 'Fri Dec 22 2017 14:42:14 GMT+0000 (GMT)',
            amount: 100.50,
            download: 20.65,
            upload: 16.90
          }],
        }
      }
    },
    user: user._id
  });

  user.save((err) => {
    if (err) { res.send(err); }

    account.save(err => {
      if (err) { res.send(err); }
      res.json({
        message: 'Account created!',
        status: 'created'
      });
    });

    user.find({})
      .populate('accounts') // --> this is not working somehow
      .exec()
      .then((users) => {
        console.log('User - ', users);
      })
      .catch(err => {
        console.log('User err - ', err);
      });
  });
});

// GET
router.get('/', (req, res) => {
  res.json({ message: 'Welcome to accounts api' });
});

router.get('/accounts', (req, res) => {
  Account.find((err, accounts) => {
    if (err) { res.send(err); }
    res.json(accounts);
  });
});

router.get('/users', (req, res) => {
  User.find({})
    .populate('accounts') // --> this is not working somehow
    .exec((err, users) => {
      if (err) { res.send(err); }
      res.json(users);
    });
});