# Description:
#   accede a wolfram alpha
#
# Dependencies:
#   "wolfram":"0.3.1"
#
# Author:
#   Enrico Fasoli (fazo96)
#


module.exports = (robot) ->
  if not process.env.WOLFRAM_API_KEY?
    console.log 'NO WOLFRAM_API_KEY SET!'
    return # no api key, no wolfy
  wolfram = require('wolfram').createClient process.env.WOLFRAM_API_KEY
  robot.respond /(?:quanto fa|compute|wfa|wolfram) (.+)/i, (res) ->
    res.send 'contattando Wolfram Alpha...'
    wolfram.query res.match[1], (err, result) ->
      if err then return res.send err
      #res.send JSON.stringify result
      parseSubPod = (subpod) -> subpod.value
      parsePod = (pod) ->
        '\n=== ' + pod.title + '\n' + pod.subpods.map(parseSubPod).join('\n')
      res.send (parsePod(pod) for pod in result).join('')