# Description:
#   accede a wolfram alpha
#
# Dependencies:
#   "wolfram":"0.3.1"
#
# Configuration:
#   WOLFRAM_API_KEY - self explanatory
#
# Commands
#   hubot wolfram/wfa/quanto fa/compute ... - pone la domanda a Wolfram Alpha
#
# Author:
#   Enrico Fasoli (fazo96)
#

Wolfram = require 'wolfram'

module.exports = (robot) ->
  robot.respond /(?:quanto fa|compute|wfa|wolfram) (.+)/i, (res) ->
    unless process.env.WOLFRAM_API_KEY
      return res.send 'non ho le chiavi per Wolfram Alpha :('
    wolfram = Wolfram.createClient process.env.WOLFRAM_API_KEY
    res.send 'Contattando Wolfram Alpha...'
    wolfram.query res.match[1], (err, result) ->
      if err then return res.send err
      unless result?.slice?
        return res.send 'invalid response from Wolfram Alpha'
      parseSubPod = (subpod) -> subpod.value or subpod.image
      parsePod = (pod) ->
        '\n=== ' + pod.title + '\n' + pod.subpods.map(parseSubPod).join('\n')
      res.send (parsePod(pod) for pod in result).join('').trim()