require 'slack-notifier'

class NotifyTrendingIpJob < ApplicationJob

  include Rails.application.routes.url_helpers

  queue_as :low_priority

  delegate :trending_items_notification_url, to: :rate_limit

  def perform(ip)

    slack.ping(message(ip))

  end

  private

  def message(ip)

    params = []

    params << ip.count

    params << start_time(ip)

    params << end_time(ip)

    params << petition_link(ip)

    params << ip_address_link(ip)

    "%d signatures between %s and %s on %s from %s" % params

  end

  def rate_limit

    @rate_limit ||= RateLimit.first_or_create!

  end

  def slack

    @slack ||= Slack::Notifier.new(trending_items_notification_url)

  end

  def time_format

    "%-I:%M%P"

  end

  def start_time(ip)

    ip.starts_at.strftime(time_format)

  end

  def end_time(ip)

    ip.ends_at.strftime(time_format)

  end

  def petition_link(ip)

    "<#{admin_petition_url(ip.petition)}|#{ip.petition.action}>"

  end

  def ip_address_link(ip)

    "<#{admin_petition_signatures_url(ip.petition, q: ip.ip_address, window: ip.window)}|#{ip.ip_address}>"

  end

end