class MultiOrder < ApplicationRecord
  has_many :orders, dependent: :nullify
  has_many :order_articles, through: :orders
  has_many :multi_group_orders, dependent: :destroy
  has_many :group_orders, through: :multi_group_orders
  has_many :ordergroups, through: :group_orders
  #TODO: wenn groupOrderInvoice existiert, dann fehler schmeißen..
  has_many :ordergroup_invoices, through: :group_orders

  #make sure order has no multi_order_id
  #make sure orders are not in a multi_order
  before_create :check_orders

  def name
    orders.map(&:name).join(', ')
  end

  def closed?
    orders.all?(&:closed?)
  end

  def stockit?
    orders.all?(&:stockit?)
  end

  def updated_by
    orders.map(&:updated_by).compact.first
  end
  def updated_at
    orders.map(&:updated_at).compact.first
  end
  def foodcoop_result
    orders.map(&:foodcoop_result).compact_blank.sum
  end

  private
  def check_orders
    orders.each do |order|
      errors.add(:base, "Order #{order.name} is already in a multi order") unless order.multi_order_id.nil?
      #closed==abgerechnet
      errors.add(:base, "Order #{order.name} not closed") unless order.closed?
    end
    if errors.any?
      errors.add(:base, "Cannot create multi order with unfinished orders")
      raise ActiveRecord::Rollback
    end
  end
end