module FacebookAds
  # An ad set belongs to a campaign and has many ads.
  # https://developers.facebook.com/docs/marketing-api/reference/ad-campaign
  class AdSet < Base
    # Full set of fields:
    # FIELDS = %w(
    #   id account_id adlabels adset_schedule attribution_window_days
    #   bid_amount bid_info billing_event budget_remaining
    #   campaign campaign_id configured_status created_time
    #   creative_sequence daily_budget effective_status end_time
    #   frequency_cap frequency_cap_reset_period
    #   frequency_control_specs instagram_actor_id
    #   is_autobid is_average_price_pacing lifetime_budget
    #   lifetime_frequency_cap lifetime_imps name optimization_goal
    #   pacing_type promoted_object recommendations
    #   recurring_budget_semantics rf_prediction_id rtb_flag
    #   start_time status targeting time_based_ad_rotation_id_blocks
    #   time_based_ad_rotation_intervals updated_time
    #   use_new_app_click
    # ).freeze

    # Fields we might actually care about:
    FIELDS = %w(
      id account_id campaign_id
      name
      status configured_status effective_status
      bid_amount billing_event optimization_goal pacing_type
      daily_budget budget_remaining lifetime_budget
      promoted_object
      targeting
      created_time updated_time
    ).freeze

    STATUSES           = %w(ACTIVE PAUSED DELETED PENDING_REVIEW DISAPPROVED PREAPPROVED PENDING_BILLING_INFO CAMPAIGN_PAUSED ARCHIVED ADSET_PAUSED).freeze
    BILLING_EVENTS     = %w(APP_INSTALLS IMPRESSIONS).freeze
    OPTIMIZATION_GOALS = %w(APP_INSTALLS OFFSITE_CONVERSIONS).freeze

    # belongs_to ad_account

    def ad_account
      @ad_account ||= AdAccount.find("act_#{account_id}")
    end

    # belongs_to ad_campaign

    def ad_campaign
      @campaign ||= AdCampaign.find(campaign_id)
    end

    # has_many ads

    def ads(effective_status: ['ACTIVE'], limit: 100)
      Ad.paginate("/#{id}/ads", query: { effective_status: effective_status, limit: limit })
    end

    def create_ad(name:, creative_id:)
      query = { name: name, adset_id: id, creative: { creative_id: creative_id }.to_json }
      result = Ad.post("/act_#{account_id}/ads", query: query)
      Ad.find(result['id'])
    end
  end
end