# Description:
#   Get a snow report from onthesnow.com
#
# Dependencies:
#   "xml2js": "0.1.14"
#
# Configuration:
#   None
#
# Commands:
#   hubot snow in <two letter state name> - Displays resort info for a state, .e.g., snow in CO
#   hubot snow at <resort>, <two letter state name> - Displays info for a single resort
#
# Author:
#   rwc9u

xml2js = require('xml2js')

states = 
  'ak':   'alaska'
  'az':   'arizona'
  'ca':   'california'
  'co':   'colorado'
  'ct':   'connecticut'
  'id':   'idaho'
  'il':   'illinois'
  'in':   'indiana'
  'ia':   'iowa'
  'me':   'maine'
  'md':   'maryland'
  'ma':   'massachusetts'
  'mi':   'michigan'
  'mn':   'minnesota'
  'mo':   'missouri'
  'mt':   'montana'
  'nv':   'nevada'
  'nh':   'new-hampshire'
  'nj':   'new-jersey'
  'nm':   'new-mexico'
  'ny':   'new-york'
  'nc':   'north-carolina'
  'oh':   'ohio'
  'or':   'oregon'
  'pa':   'pennsylvania'
  'sd':   'south-dakota'
  'tn':   'tennessee'
  'ut':   'utah'
  'vt':   'vermont'
  'va':   'virginia'
  'wa':   'washington'
  'wv':   'west-virginia'
  'wi':   'wisconsin'
  'wy':   'wyoming'

module.exports = (robot) ->
  robot.respond /snow in (\w+)$/i, (msg) ->
    snow_report(msg, msg.match[1], null)
  robot.respond /snow at (.+), (\w+)$/i, (msg) ->
    snow_report(msg, msg.match[2], msg.match[1])


snow_report = (msg, state, resort) ->
  state_full = states[state.toLowerCase()]
  if !state_full
    msg.send "Sorry bro, #{state} isn't a legit state or there are no resorts there!"
    return 
  
  get_snow_report(msg,"http://www.onthesnow.com/#{state_full}/snow-rss.html",resort)

get_snow_report = (msg, url, resort) ->
  msg.http(url)
    .get() (err, res, body) ->
      if res.statusCode is 301
        get_snow_report msg, res.headers.location, resort
      else if res.statusCode is 404
         msg.send "Couldn't find that location."
      else
        parser = new xml2js.Parser()
        parser.parseString body, (err, result) ->
          if err
            msg.send "Got: #{err}"
          output = ""
          for area in result.channel.item
            if resort? and resort.toLowerCase() == area.title.toLowerCase()
              output =  "#{area.title} - #{area.description}"
            else
              output += "#{area.title} - #{area.description}\n" unless resort?
          msg.send output