# frozen_string_literal: true

# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
module QueryEventMetrics
  def self.expression(additional_selects = [])
    selects = [
      'coalesce(tickets.total, 0) AS total_attendees',
      'coalesce(tickets.checked_in_count, 0) AS checked_in_count',
      'coalesce(ticket_payments.total_paid, 0) AS tickets_total_paid',
      'coalesce(donations.payment_total, 0) AS donations_total_paid',
      'coalesce(ticket_payments.total_paid, 0) + coalesce(donations.payment_total, 0) AS total_paid'
    ]

    tickets_sub = Qx.select('event_id', 'SUM(quantity) AS total', 'SUM(tickets.checked_in::int) AS checked_in_count')
                    .from('tickets')
                    .group_by('event_id')
                    .as('tickets')

    ticket_payments_subquery = Qx.select('payment_id', 'MAX(event_id) AS event_id').from('tickets').group_by('payment_id').as('tickets')

    ticket_payments_sub = Qx.select('SUM(payments.gross_amount) AS total_paid', 'tickets.event_id')
                            .from(:payments)
                            .join(ticket_payments_subquery, 'payments.id=tickets.payment_id')
                            .group_by('tickets.event_id')
                            .as('ticket_payments')

    donations_sub = Qx.select('event_id', 'SUM(payments.gross_amount) as payment_total')
                      .from('donations')
                      .group_by('event_id')
                      .left_join('payments', 'donations.id=payments.donation_id')
                      .as('donations')

    selects = selects.concat(additional_selects)
    Qx.select(*selects)
      .from('events')
      .left_join(
        [tickets_sub, 'tickets.event_id = events.id'],
        [donations_sub, 'donations.event_id = events.id'],
        [ticket_payments_sub, 'ticket_payments.event_id=events.id']
      )
  end

  def self.with_event_ids(event_ids)
    return [] if event_ids.empty?

    QueryEventMetrics.expression.where('events.id in ($ids)', ids: event_ids).execute
  end

  def self.for_listings(id_type, id, params)
    selects = [
      'events.id',
      'events.name',
      'events.venue_name',
      'events.address',
      'events.city',
      'events.state_code',
      'events.zip_code',
      'events.start_datetime',
      'events.end_datetime',
      'events.organizer_email'
    ]

    exp = QueryEventMetrics.expression(selects)

    if id_type == 'profile'
      exp = exp.and_where(['events.profile_id = $id', id: id])
    end
    if id_type == 'nonprofit'
      exp = exp.and_where(['events.nonprofit_id = $id', id: id])
    end
    if params['active'].present?
      exp = exp
            .and_where(['events.end_datetime >= $date', date: Time.now])
            .and_where(['events.published = TRUE AND coalesce(events.deleted, FALSE) = FALSE'])
    end
    if params['past'].present?
      exp = exp
            .and_where(['events.end_datetime < $date', date: Time.now])
            .and_where(['events.published = TRUE AND coalesce(events.deleted, FALSE) = FALSE'])
    end
    if params['unpublished'].present?
      exp = exp.and_where(['coalesce(events.published, FALSE) = FALSE AND coalesce(events.deleted, FALSE) = FALSE'])
    end
    exp = exp.and_where(['events.deleted = TRUE']) if params['deleted'].present?
    exp.execute
  end
end