import express from 'express'
import pkg from '../package.json' assert { type: "json" }
import { setLanguage } from '../charts/utilities.js'

const router = express.Router()
const { name, version, date } = pkg

const renderOpts = (sid, cat) => {
  let tit = 'Feinstaub'
  if (cat === 'multigeiger') {
    tit = 'Geiger'
  } else if (cat == 'noise') {
    tit = 'Noise'
  }
  return {
    title: tit,
    version: version,
    date: date.slice(0, 10),
    csensor: sid,
    category: cat
  }
}

let i18n;

const translate = (x) => {
  return i18n.t(x)
}

const getIndex = (cat) => {
  if (cat == 'noise') {
    return 'index_noise'
  } else if (cat === 'multigeiger') {
    return 'index_geiger'
  }
}


/* GET home page. If there is no parameter 'lng=xx', check stored language and call
te page again with correct language (chglang.js))
*/
router.get('/', function (req, res, next) {
  //  req.i18n.changeLanguage('de')
  if (req.query.lng === undefined) {
    res.render('chglang', {sensorid: ''})
  } else {
    i18n = req.i18n
    let opts = renderOpts(-1, req.app.get('category'))
    setLanguage(req.query.lng)
    res.render(getIndex(opts.category), opts)
  }
})

//
// router.get('/', function(req, res, next) {
// //  req.i18n.changeLanguage('de')
//   res.render('index', renderOpts(-1))
// })


router.get('/:sid', async function (req, res, next) {
  const sid = req.params.sid
  let opts
  if (req.query.lng === undefined) {
    res.render('chglang', { sensorid: sid })
  } else {
    i18n = req.i18n
    if (isNaN(sid)) {
      opts = renderOpts(-1, req.app.get('category'))
    } else {
      opts = renderOpts(sid, req.app.get('category'))
    }
    res.render(getIndex(opts.category), opts)
  }
})

//export default router

export { router, translate }