module Comee
  module Core
    class MasterPrice < Price
      before_save :set_default_currency

      enum :price_status, {draft: 0, approved: 1}
      belongs_to :supplier
      belongs_to :previous_price, class_name: "Comee::Core::MasterPrice", optional: true
      belongs_to :next_price, class_name: "Comee::Core::MasterPrice", optional: true
      belongs_to :country_of_origin, -> { where(lookup_type: :country) }, class_name: "Comee::Core::Lookup", optional: true
      belongs_to :product_lookup, optional: true
      belongs_to :currency, optional: true

      validates :purchase_price, :selling_price, presence: true
      validates :margin, presence: true, numericality: {greater_than_or_equal_to: 0, less_than_or_equal_to: 100}
      validates :product_id, uniqueness: {scope: %i[supplier_id previous_price_id next_price_id status]}
      validate :validate_primary_price, :validate_product_lookup

      scope :current_primary, -> { where(primary: true).current }
      scope :unapplied, -> { where(propagated_to_client: false).current_primary }

      def self.product_price(product_id)
        MasterPrice.find_by(
          product_id: product_id,
          primary: true,
          status: Price.statuses[:current]
        )
      end

      def validate_primary_price
        return unless product && primary

        price = MasterPrice.find_by(product: product, primary: true, status: Price.statuses[:current])
        return unless price && price.id != id && status == price.status

        errors.add(:base, "There is already a primary price entry for item '#{product.code}'")
      end

      def validate_product_lookup
        return unless product_lookup && product && supplier

        if product_lookup.itemable_id != supplier_id ||
           product_lookup.itemable_type != "Comee::Core::Supplier" ||
           product_lookup.product_id != product_id
          errors.add(:product_lookup, "contains wrong supplier or product.")
        end
      end

      def set_default_currency
        return if currency

        self.currency = Comee::Core::Currency.find_by(code: "EUR")
      end

      def self.ransackable_attributes(_auth_object = nil)
        %w[
          id
          valid_from
          valid_to
          purchase_price
          selling_price
          status
          product_id
          supplier_id
          previous_price_id
          next_price_id
        ]
      end

      def self.ransackable_associations(_auth_object = nil)
        %w[product supplier product_lookup]
      end
    end
  end
end