# Description:
#   List autoscaling notification configuration
#
# Commands:
#   hubot autoscaling notification ls - Displays all AutoScaling NotificationConfigurations
#   hubot autoscaling notification ls --group_name=[group_name] - Details an Autoscaling NotificationConfiguration

util   = require 'util'
tsv    = require 'tsv'

getArgParams = (arg) ->
  group_name_capture = /--group_name=(.*?)( |$)/.exec(arg)
  group_name = if group_name_capture then group_name_capture[1] else ''

  return {group_name: group_name}

module.exports = (robot) ->
  robot.respond /autoscaling notification ls(.*)$/i, (msg) ->
    arg_params = getArgParams(msg.match[1])
    group_name = arg_params.group_name

    msg.send "Fetching #{group_name || 'all (group_name is not provided)'}..."

    aws = require('../../aws.coffee').aws()
    autoscaling = new aws.AutoScaling({apiVersion: '2011-01-01'})

    autoscaling.describeNotificationConfigurations (if group_name then { AutoScalingGroupNames: [group_name] } else null), (err, res) ->
      if err
        msg.send "Error: #{err}"
      else
        if group_name
          msg.send util.inspect(res, false, null)
        else
          messages = []
          res.NotificationConfigurations.sort (a, b) ->
            return -1 if a.AutoScalingGroupName < b.AutoScalingGroupName
            return  1 if a.AutoScalingGroupName > b.AutoScalingGroupName
            return  0

          for conf in res.NotificationConfigurations
            messages.push({
              name      : conf.AutoScalingGroupName
              type      : conf.NotificationType
              topic_arn : conf.TopicARN
            })

          message = tsv.stringify(messages) || '[None]'
          msg.send message