function inject (bot) {
  const transactions = {}
  let transactionId = 0

  function tabComplete (text) {
    return new Promise(resolve => {
      transactions[transactionId] = resolve
      bot._client.write('tab_complete', { transactionId, text })

      transactionId = (transactionId + 1) % 256
    })
  }

  bot.on('packet.tab_complete', packet => {
    if (!transactions[packet.transactionId]) return

    transactions[packet.transactionId](packet)
    delete transactions[packet.transactionId]
  })

  bot.tabComplete = tabComplete 
}

module.exports = inject