const router = module.exports = require('express-promise-router')()
const bodyParser = require('body-parser')
const parseJSON = bodyParser.json()
const b64 = require('base64-async')
const db = require('../db')
const ensureAdmin = require('./middleware/ensureAdmin')

const validate = require('./middleware/validators')

const upload = require('multer')({
  storage: require('multer').memoryStorage(),
  limits: {
    files: 1,
    fileSize: 3000000
  }
})

router.get('/', async (req, res) => {
  const showUnpublished = (req.user?.is_admin && req.query.showUnpublished) || false

  const items = await db.item.findAll(showUnpublished)

  res.json(items)
})

const itemValidators = [
  validate.validUrlSlug('urlslug'),
  validate.publishedBool,
  validate.positiveInteger('price_cents'),
  validate.requiredString('name'),
  validate.requiredString('description'),
  validate.handleApiError
]

router.post('/', ensureAdmin, parseJSON, itemValidators, async (req, res) => {
  const item = await db.item.create(
    req.body.name,
    req.body.urlslug,
    req.body.description,
    req.body.price_cents,
    req.body.published,
    req.body.hs_tariff_number,
    req.body.customs_description,
    req.body.origin_country,
    req.body.weight
  )

  res.json(item)
})

router.get('/by-slug/:slug', async (req, res) => {
  const item = await db.item.findBySlug(req.params.slug);

  if(!item.published)
    return res.json(null)

  res.json(item)
})

router.post('/:uuid', ensureAdmin, parseJSON, itemValidators, async (req, res) => {
  const item = await db.item.update(
    req.params.uuid,
    req.body.name,
    req.body.urlslug,
    req.body.description,
    req.body.price_cents,
    req.body.published
  )

  res.json(item)
})

router.post('/:uuid/images', ensureAdmin, upload.single('image'), bodyParser.json({limit: '5MB'}), async (req, res) => {
  // Handle either image upload body or JSON body
  try {
    if(req.file)
      await db.item.addImage(req.params.uuid, req.file.buffer, req.user.uuid)
    else
      await db.item.addImage(req.params.uuid, await b64.decode(req.body.image.split(',')[1]), req.user.uuid)
  } catch (error) {
    error.status = 500
    throw error
  }

  res.json(await db.item.findById(req.params.uuid))
})

router.post('/:uuid/publish', ensureAdmin, async (req, res) => {
  const item = await db.item.publish(req.params.uuid)
  res.json(item)
})

router.post('/:uuid/unpublish', ensureAdmin, async (req, res) => {
  const item = await db.item.unpublish(req.params.uuid)
  res.json(item)
})

router.get('/:uuid/preorder/count', ensureAdmin, async (req, res) => {
  const count = await db.item.getPreorderCount(req.params.uuid);

  res.json(count)
})

router.post('/:uuid/preorder', ensureAdmin, parseJSON, async (req, res) => {
  const item = await db.item.setPreorder(
    req.params.uuid,
    req.body.availability_date,
    req.body.preorder_maximum
  )

  res.json(item);
})