// const aws = require('aws-sdk')
// const s3 = new aws.S3()
const fs = require('fs').promises
const path = require('path')
const util = require('util')
const exec = util.promisify(require('child_process').exec)
const express = require('express')
const router = express.Router()
const { Mutex } = require('async-mutex')
const mutex = new Mutex()
const oauth = require('oauth')
const multer = require('multer')
const Contribution = require('../models/contributions.model.js')
const upload = multer({ dest: '/tmp/tornado' })

const consumer = new oauth.OAuth(
  'https://twitter.com/oauth/request_token',
  'https://twitter.com/oauth/access_token',
  process.env.TWITTER_CONSUMER_KEY,
  process.env.TWITTER_CONSUMER_SECRET,
  '1.0A',
  process.env.TWITTER_CALLBACK_URL,
  'HMAC-SHA1'
)

// async function uploadToS3(response) {
//   const currentContributionIndex = await Contribution.currentContributionIndex()
//   return await s3
//     .upload({
//       Bucket: process.env.AWS_S3_BUCKET,
//       Key: `response_${currentContributionIndex}`,
//       ACL: 'public-read',
//       Body: response
//     })
//     .promise()
// }

async function verifyResponse({ filename }) {
  console.log('Running verifier')
  const { stdout, stderr } = await exec(
    `../bin/verify_contribution circuit.json current.params /tmp/tornado/${filename}`,
    {
      cwd: './server/snark_files/',
      env: { RUST_BACKTRACE: 1 }
    }
  )
  console.log(stdout)
  console.error(stderr)
}

// router.get('/', (req, res) => {
//   let userData
//   consumer.get(
//     'https://api.twitter.com/1.1/account/verify_credentials.json',
//     req.session.oauthAccessToken,
//     req.session.oauthAccessTokenSecret,
//     function(error, data) {
//       if (error) {
//         console.log('error', error)
//         userData = { name: 'Anonymous' }
//         res.render('pages/index', { userData })
//         // res.send("Error getting twitter screen name : " + util.inspect(error), 500);
//       } else {
//         userData = JSON.parse(data)
//         req.session.twitterScreenName = userData.screen_name
//         res.render('pages/index', { userData })
//       }
//     }
//   )
// })

router.get('/challenge', (req, res) => {
  res.sendFile('./snark_files/current.params', { root: path.join(__dirname, '../') })
})

router.get('/contributions', async (req, res) => {
  const contributions = await Contribution.getContributions()
  res.json(contributions).send()
})

router.post('/response', upload.single('response'), async (req, res) => {
  if (!req.file) {
    res.status(400).send('Missing response file')
    return
  }

  await mutex.runExclusive(async () => {
    const currentContributionIndex = await Contribution.currentContributionIndex()
    try {
      console.log(`Started processing contribution ${currentContributionIndex}`)
      // await fs.writeFile('/tmp/new.params', req.file.response.data)
      await verifyResponse({ filename: req.file.filename })
    } catch (e) {
      console.error('Error', e)
      res.status(422).send(e.toString())
      return
    }

    try {
      console.log('Contribution is correct, uploading to storage')
      // await uploadToS3(req.files.response.data)
      // await fs.copyFile(
      //   '/tmp/new.params',
      //   `./snark_files/response_${currentContributionIndex}`
      // )

      console.log('Committing changes')
      await fs.rename(`/tmp/tornado/${req.file.filename}`, './server/snark_files/current.params')
      await Contribution.insertContributionInfo(
        req.body ? req.body.name || null : null,
        req.body ? req.body.company || null : null
      )
      console.log('Finished')
      res.send()
    } catch (e) {
      console.error('Error', e)
      res.status(503).send(e.toString())
    }
  })
})

module.exports = router