const bot = new Telegraf(TOKEN)

let db

MongoClient.connect(MONGO_URL)
  .then(_db => {
    db = _db
  })
  .then(() => {
    let session = new MongoSession(db)

    session.setup().then(() => {
      bot.use(session.middleware)

      bot.start(ctx => {
        ctx.session.orderState = { tags: {} }
        console.log(ctx.session)
      })

      bot.on('callback_query', ctx => {
        switch(ctx.update.callback_query.data) {
          case '1000rub':
            ctx.session.orderState.provisionalSum = ctx.update.callback_query.data
            console.log(ctx.session)
            break

          case 'nezni':
            ctx.session.orderState.hue = ctx.update.callback_query.data
            console.log(ctx.session)
            break

          case 'leto':
            ctx.session.orderState.tags[ctx.update.callback_query.data] = ctx.update.callback_query.data
            console.log(ctx.session)
            break
        }
      })

      bot.startPolling()
    })
  })