'use strict'
const zlib = require('zlib')
const cors = require('cors')
const debug = require('debug')
const appRoot = require('app-root-path')

const { matomoMiddleware } = require(`${appRoot}/logging/matomoHelper`)
const { contextMiddleware } = require(`${appRoot}/modules/shared`)
const { validatePermissionsWriteStream } = require('./authUtils')

const { hasObjects } = require('../services/objects')

module.exports = (app) => {
  app.options('/api/diff/:streamId', cors())

  app.post(
    '/api/diff/:streamId',
    cors(),
    contextMiddleware,
    matomoMiddleware,
    async (req, res) => {
      let hasStreamAccess = await validatePermissionsWriteStream(
        req.params.streamId,
        req
      )
      if (!hasStreamAccess.result) {
        return res.status(hasStreamAccess.status).end()
      }

      let objectList = JSON.parse(req.body.objects)

      debug('speckle:info')(
        `[User ${req.context.userId || '-'}] Diffing ${
          objectList.length
        } objects for stream ${req.params.streamId}`
      )

      let response = await hasObjects({
        streamId: req.params.streamId,
        objectIds: objectList
      })
      // console.log(response)
      res.writeHead(200, {
        'Content-Encoding': 'gzip',
        'Content-Type': 'application/json'
      })
      const gzip = zlib.createGzip()
      gzip.write(JSON.stringify(response))
      gzip.flush()
      gzip.end()
      gzip.pipe(res)
    }
  )
}