# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
require 'qexpr'

module QueryCampaigns

  def self.featured(limit, gross_more_than)
    expr = Qexpr.new.select(
      'campaigns.name',
      'campaigns.summary',
      'campaigns.gross',
      Image._url('campaigns', 'main_image', 'normal') + 'AS main_image_url',
      "concat('/nonprofits/', campaigns.nonprofit_id, '/campaigns/', campaigns.id) AS url"
    ).from(
      Qexpr.new.select("campaigns.*", "SUM(donations.amount) AS gross")
      .from("campaigns")
      .join("donations", "donations.campaign_id=campaigns.id")
      .group_by("campaigns.id"),
      "campaigns"
    ).where("campaigns.gross > $amount AND campaigns.published='t' AND campaigns.nonprofit_id!=$id", amount: gross_more_than, id: 4182)
     .order_by("campaigns.updated_at ASC")
     .limit(limit)

    Psql.execute(expr.parse)
  end


  def self.timeline(campaign_id)
     ex = QueryCampaigns.payments_expression(campaign_id, true)
     ex.group_by("DATE(payments.date)")
      .order_by("DATE(payments.date)")
      .execute
  end


  def self.payments_expression(campaign_id, for_timeline)
    selects = [
        "coalesce(SUM(payments.gross_amount), 0) AS total_cents",
        "coalesce(SUM(recurring.gross_amount), 0) AS recurring_cents",
        "coalesce(SUM(offsite.gross_amount), 0) AS offsite_cents",
        "coalesce(SUM(onetime.gross_amount), 0) AS onetime_cents"]

    for_timeline ? 
      selects.push("MAX(DATE(payments.date)) AS date") : 
      selects.push("coalesce(count(supporters.id), 0) AS supporters_count")

     return Qx.select(*selects)
      .from("payments")
      .left_join(
        ["donations", "payments.donation_id=donations.id"],
        ["payments AS onetime", "onetime.id=payments.id AND onetime.kind='Donation'"],
        ["payments AS offsite", "offsite.id=payments.id AND offsite.kind='OffsitePayment'"],
        ["payments AS recurring", "recurring.id=payments.id AND recurring.kind='RecurringDonation'"])
      .where("donations.campaign_id IN (#{QueryCampaigns.get_campaign_and_children(campaign_id).parse})")
  end


  def self.totals(campaign_id)
     ex = QueryCampaigns.payments_expression(campaign_id, false)
     ex.add_left_join(["supporters", "donations.supporter_id=supporters.id"])
      .execute.first
  end


  def self.name_and_id(npo_id)

    np = Nonprofit.find(npo_id)
    campaigns = np.campaigns.not_deleted.includes(:profile).order('campaigns.name ASC')
    output = campaigns.map do |i|
      {
          'name' => i.name,
          'id' => i.id,
          'isChildCampaign' => i.child_campaign?,
          'creator' => i.profile&.name || "user ##{i.profile.id}"
      }
    end
    output
  end

  def self.get_campaign_and_children(campaign_id)
    Qx.select("id")
        .from('campaigns')
        .where("campaigns.id = $id OR campaigns.parent_campaign_id=$id",
               id: campaign_id)
  end


end