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) => {
  return {
    title: name,
    version: version,
    date: date.slice(0,10),
    csensor: sid
  }
}

let i18n;

const translate = (x) => {
  return i18n.t(x)
}
/* 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')
  } else {
    i18n = req.i18n
    let opts = renderOpts(-1)
    setLanguage(req.query.lng)
    res.render('index', 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
  if(isNaN(sid)) {
    res.render('index', renderOpts(-1))
  } else {
    res.render('index', renderOpts(sid))
  }
})

//export default router

export  { router, translate }