require 'slack-notifier'

class NotifyTrendingDomainJob < ApplicationJob

  include Rails.application.routes.url_helpers

  queue_as :low_priority

  delegate :trending_items_notification_url, to: :rate_limit

  def perform(domain)

    slack.ping(message(domain))

  end

  private

  def message(domain)

    params = []

    params << domain.count

    params << start_time(domain)

    params << end_time(domain)

    params << petition_link(domain)

    params << domain_address_link(domain)

    "%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(domain)

    domain.starts_at.strftime(time_format)

  end

  def end_time(domain)

    domain.ends_at.strftime(time_format)

  end

  def petition_link(domain)

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

  end

  def domain_address_link(domain)

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

  end

end