class SuppliersPlugin::SourceProduct < ApplicationRecord

  attr_accessible :from_product, :to_product, :quantity

  default_scope -> { includes :from_product, :to_product }

  belongs_to :from_product, class_name: 'Product'
  belongs_to :to_product, class_name: 'Product'
  belongs_to :supplier, class_name: 'SuppliersPlugin::Supplier'

  has_many :sources_from_products, through: :from_product
  has_many :sources_to_products, through: :to_product

  has_one :supplier_profile, through: :supplier, source: :profile

  before_validation :find_supplier

  validates_presence_of :from_product
  validates_presence_of :to_product
  validates_presence_of :supplier
  validates_numericality_of :quantity, allow_nil: true

  protected

  def find_supplier
    self.supplier = SuppliersPlugin::Supplier.where(profile_id: self.from_product.profile_id, consumer_id: self.to_product.profile_id).first
    raise "Can't find supplier" unless self.supplier
    self.supplier
  end

end