# frozen_string_literal: true

class Spree::PromotionCode < Spree::Base
  belongs_to :promotion, inverse_of: :codes, optional: true
  belongs_to :promotion_code_batch, class_name: "Spree::PromotionCodeBatch", optional: true
  has_many :adjustments

  validates :value, presence: true, uniqueness: { allow_blank: true }
  validates :promotion, presence: true

  before_save :normalize_code

  self.whitelisted_ransackable_attributes = ['value']

  # Whether the promotion code has exceeded its usage restrictions
  #
  # @return true or false
  def usage_limit_exceeded?
    if usage_limit
      usage_count >= usage_limit
    end
  end

  # Number of times the code has been used overall
  #
  # @return [Integer] usage count
  def usage_count
    adjustments.eligible.
      joins(:order).
      merge(Spree::Order.complete).
      distinct.
      count(:order_id)
  end

  def usage_limit
    promotion.per_code_usage_limit
  end

  private

  def normalize_code
    self.value = value.downcase.strip
  end
end
