module Agents
  class HipchatAgent < Agent
    include FormConfigurable

    cannot_be_scheduled!
    cannot_create_events!
    no_bulk_receive!

    gem_dependency_check { defined?(HipChat) }

    description <<-MD
      The Hipchat Agent sends messages to a Hipchat Room

      #{'## Include `hipchat` in your Gemfile to use this Agent!' if dependencies_missing?}

      To authenticate you need to set the `auth_token`, you can get one at your Hipchat Group Admin page which you can find here:

      `https://`yoursubdomain`.hipchat.com/admin/api`

      Change the `room_name` to the name of the room you want to send notifications to.

      You can provide a `username` and a `message`. If you want to use mentions change `format` to "text" ([details](https://www.hipchat.com/docs/api/method/rooms/message)).

      If you want your message to notify the room members change `notify` to "True".

      Modify the background color of your message via the `color` attribute (one of "yellow", "red", "green", "purple", "gray", or "random")

      Have a look at the [Wiki](https://github.com/cantino/huginn/wiki/Formatting-Events-using-Liquid) to learn more about liquid templating.
    MD

    def default_options
      {
        'auth_token' => '',
        'room_name' => '',
        'username' => "Huginn",
        'message' => "Hello from Huginn!",
        'notify' => false,
        'color' => 'yellow',
        'format' => 'html'
      }
    end

    form_configurable :auth_token, roles: :validatable
    form_configurable :room_name, roles: :completable
    form_configurable :username
    form_configurable :message, type: :text
    form_configurable :notify, type: :boolean
    form_configurable :color, type: :array, values: ['yellow', 'red', 'green', 'purple', 'gray', 'random']
    form_configurable :format, type: :array, values: ['html', 'text']

    def validate_auth_token
      client.rooms
      true
    rescue HipChat::UnknownResponseCode
      return false
    end

    def complete_room_name
      client.rooms.collect { |room| {text: room.name, id: room.name} }
    end

    def validate_options
      errors.add(:base, "you need to specify a hipchat auth_token or provide a credential named hipchat_auth_token") unless options['auth_token'].present? || credential('hipchat_auth_token').present?
      errors.add(:base, "you need to specify a room_name or a room_name_path") if options['room_name'].blank? && options['room_name_path'].blank?
    end

    def working?
      received_event_without_error?
    end

    def receive(incoming_events)
      incoming_events.each do |event|
        mo = interpolated(event)
        client[mo[:room_name]].send(mo[:username][0..14], mo[:message],
                                      notify: boolify(mo[:notify]),
                                      color: mo[:color],
                                      message_format: mo[:format].presence || 'html'
                                    )
      end
    end

    private
    def client
      @client ||= HipChat::Client.new(interpolated[:auth_token].presence || credential('hipchat_auth_token'))
    end
  end
end
