const express = require('express')
const router = express.Router()
const Subscriber = require('../models/subscriber')
//getting all
router.get('/', async (req, res) => {
  try {
    const subscribers = await Subscriber.find()
    res.json(subscribers)
  } catch (err) {
    res.status(500).json({
      message: err.message
    })
  }
})
//getting one 
router.get('/:id', getSubscriber, (req, res) => {
  res.json(res.subscriber)
})
//creating one
router.post('/', async (req, res) => {
  const subscriber = new Subscriber({
    name: req.body.name,
    subscribedToChannel: req.body.subscribedToChannel
  })
  try {
    const newSubscriber = await subscriber.save()
    res.status(201).json(newSubscriber)
  } catch (err) {
    res.status(400).json({
      message: err.message
    })
  }
})

//updating one
router.patch('/:id', getSubscriber, async (req, res) => {
  if (req.body.name != null) {
    res.subscriber.name = req.body.name
  }
  if (req.body.subscribedToChannel != null) {
    res.subscriber.subscribedToChannel = req.body.subscribedToChannel
  }
  try {
    const updatedSubscriber = await res.subscriber.save()
    res.json(updatedSubscriber)
  } catch (err) {
    res.status(400).json({
      message: err.message
    })
  }
})

//deleting one
router.delete('/:id', getSubscriber, async (req, res) => {
  console.log(req.body)
  try {
    await res.subscriber.remove()
    res.json({
      message: 'deleted subscriber'
    })
  } catch (err) {
    res.status(500)({
      message: err.message
    })
  }
})




// this function works as middleware
async function getSubscriber(req, res, next) {
  let subscriber
  try {
    subscriber = await Subscriber.findById(req.params.id)
    if (subscriber == null) {
      return res.status(404).json({
        message: 'Cannot find subscriber'
      })
    }
  } catch (err) {
    return res.status(500).json({
      message: err.message
    })
  }
  res.subscriber = subscriber
  next()
}

module.exports = router