class Shop < ApplicationRecord

  def promo_activate
    current_day = Time.now.strftime("%Y-%d-%m")
    current_time = Time.now.strftime('%H:%M')
    day = Date.today.wday
    promoList = is_between_promo_datetime(current_day,current_time)
    if promoList.size > 0
      itemList = combine_item(saleObj)
      is_promo_day(promoList,day, itemList)
    end
  end

  def is_between_promo_datetime(current_day,current_time)
    promoList = Promotion.where('( promo_start_date < ? AND promo_end_date > ?) AND (promo_start_time < ? AND promo_end_time > ?)', current_day, current_day, current_time, current_time)
    return promoList
  end

  def combine_item(saleObj)
    itemList = saleObj.sale_items.group(:product_code).sum(:qty)
  end

  def is_promo_day(promoList, day, orderitemList)
    promoList.each do |promo|
      dayresult = promo.promo_day.include?(day)
      if dayresult
        orderitemList.each do |item|
          find_promo_item(promo, item)
        end
      end
    end
  end

  def find_promo_item(promo, orderitem)
     if promo.prouduct_item == orderitem
        if promo.minmum_qty < orderitem.qty
          return false
        else
          same, promo_item_code = check_giveaway_product(promo, orderitem)
          if same
            give_promotion_same_product
          else
            find_promo_item_in_orderlist
          end
        end
     end
  end

  def check_giveaway_product(promo, orderitem)
    promo.promotion_products.each do |promo_product|
      if promo_product.item_code == orderitem.item_code
        return true, promo_product.item_code
      else
        return false, promo_product.item_code
      end
    end
  end

  def self.give_promotion_same_product(qty, promoqty, foc_min_qty)
     multiple = qty / promoqty # loop count
     charge_qty = 0
     foc_qty = 0
     if multiple > 0
       multiple.times.each do |key|
         if qty >= promoqty
           charge_qty += promoqty
           different = qty - promoqty
           qty = different
           if different == 0
              Shop.add_promotion_item
              foc_qty += foc_min_qty
           else
             foc_qty += foc_min_qty
             qty = qty - foc_min_qty
           end
         else
           if multiple == foc_qty
             charge_qty += qty
           else
              charge_qty += qty
           end
         end
       end
     else
       charge_qty = qty
     end
     puts "Charged - " + charge_qty.to_s
     puts "FOC - " + foc_qty.to_s
  end

  def find_promo_item_in_orderlist(promo_item_code, orderitemList)
      orderitemList.each do |item|
        if item.item_code == promo_item_code
          give_promotion_second_product(item)
        else
          add_promotion_second_item
        end
      end
  end

  def give_promotion_second_product(item, foc_min_qty)
    if item.qty > foc_min_qty
       
    else

    end
  end

  def self.add_promotion_item

  end

  def self.add_promotion_second_item

  end
end