class Promotion < ApplicationRecord
  validates_presence_of  :promo_code,:promo_start_date,:promo_end_date,:promo_start_hour,:promo_end_hour,:promo_type,:original_product,:min_qty

  has_many :promotion_products

  accepts_nested_attributes_for :promotion_products , :allow_destroy => true , update_only: true

  PROMO_TYPE1 = "Quantity"
  PROMO_TYPE2 = "Net_off" # 3000 => - 500  => 2500 [total]
  PROMO_TYPE3 = "Net_price" # 1800 => 1000 => 1000
  PROMO_TYPE4 = "Percentage"

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

  def self.is_between_promo_datetime(current_day,current_time) #database is not local time
    promoList = Promotion.where("(Date_Format(promo_start_date, '%Y-%m-%d') <=? AND Date_Format(promo_end_date, '%Y-%m-%d') >=?) AND (promo_start_hour < ? AND promo_end_hour > ?)", current_day, current_day, current_time, current_time)
    return promoList
  end

  def self.combine_item(saleObj)
    # order_id = saleObj.sale_orders[0].order_id
    # itemList = OrderItem.where("order_id = ?", order_id).group(:item_instance_code).sum(:qty)
    itemList = []
    saleObj.sale_orders.each do |so|
      itemList << OrderItem.where("order_id = ?",so.order_id).group(:item_instance_code).sum(:qty)
    end
    return itemList
  end

  def self.is_promo_day(promoList, day, orderitemList, sale_id)
    puts "Today date - " + day.to_s
    promoList.each do |promo|
      dayresult = promo.promo_day.include?(day.to_s)
      if dayresult
        orderitemList.each do |item|
          find_promo_item(promo, item, sale_id)
        end
      end
    end
  end

  def self.find_promo_item(promo, orderitem, sale_id)
    #  item_code = OrderItem.find_by_item_instance_code(orderitem[0]).item_code
    orderitem.each do |odr_item|
       if promo.original_product.to_s == odr_item[0]
          if promo.min_qty.to_i > odr_item[1].to_i
            return false
          else
            check_promo_type(promo,odr_item, sale_id)
          end
       end
    end
  end

  def self.check_promo_type(promo, orderitem, sale_id)
    promo.promotion_products.each do |promo_product|
     if promo_product.item_code == orderitem[0]
       same = true
     else
       # return false, promo_product
       same = false
     end
     # same, promo_product = check_giveaway_product(promo, orderitem[0])
     if promo.promo_type == Promotion::PROMO_TYPE1
       if same
         give_promotion_same_product(orderitem[1], promo.min_qty, promo_product.min_qty, orderitem, sale_id,promo_product.item_code)
       else
         give_promotion_second_product(orderitem[1], promo.min_qty, promo_product.item_code, orderitem, sale_id)
       end

     elsif promo.promo_type == Promotion::PROMO_TYPE2
        give_promotion_nett_off(same,promo_product,promo.min_qty, orderitem, sale_id)

     elsif promo.promo_type == Promotion::PROMO_TYPE3
       give_promotion_nett_price(same,promo_product,promo.min_qty, orderitem, sale_id)

     elsif promo.promo_type == Promotion::PROMO_TYPE4
       give_promotion_discount(same,promo_product,promo.min_qty, orderitem, sale_id)
     end
   end
  end

  def self.check_giveaway_product(promo, orderitem)
    # promo_pp = []
    # flag = false
    # promo.promotion_products.each do |promo_product|
    #   if promo_product.item_code == orderitem
    #     # return true, promo_product
    #     promo_pp.push(promo_product)
    #   else
    #     # return false, promo_product
    #   end
    # end
  end

  def self.give_promotion_same_product(qty, promoqty, foc_min_qty, orderitem, sale_id,promo_product)
     puts " Order qty: " + qty.to_s + " / promoqty: " + promoqty.to_s + " / giveaway: " + foc_min_qty.to_s
     multiple = qty.to_i / promoqty.to_i # 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
              foc_qty += foc_min_qty
           else
             foc_qty += foc_min_qty
             qty = qty - foc_min_qty
           end
         else
            charge_qty += qty
         end
       end
       if multiple == foc_qty
         charge_qty += qty
       end
     else
       charge_qty += qty
     end
     item = OrderItem.find_by_item_instance_code(orderitem[0])
     if promo_product == OrderItem.find_by_item_instance_code(orderitem[0]).item_instance_code
       item = OrderItem.find_by_item_instance_code(orderitem[0])
     else
       item = OrderItem.find_by_item_code(promo_product)
     end
     update_existing_item(foc_qty, item, sale_id, "promotion", item.price)

     puts "Charged - " + charge_qty.to_s
     puts "FOC - " + foc_qty.to_s
  end
                                         # AA - 10        # 3          # BB         # orderList, #S34345
  def self.give_promotion_second_product(orderitem_count, foc_min_qty, promo_product, orderitem, sale_id)
    puts "..... orderitem_count: " + orderitem_count.to_s + " / foc_min_qty: " + foc_min_qty.to_s + " /promo_product: " + promo_product + " orderitem: " + orderitem.to_s
    promotion_qty = orderitem_count.to_i / foc_min_qty.to_i # get foc item qty
    foc_qty = find_second_item_qty(sale_id, promo_product)
    if (foc_qty < promotion_qty)
      promotion_qty = foc_qty
    end
    item = OrderItem.find_by_item_instance_code(promo_product)
    update_existing_item(promotion_qty, item, sale_id, "promotion", item.price)
  end

  def self.update_existing_item(qty, item, sale_id, type, item_price)

    sale_item = SaleItem.new
    sale_item.product_code = item.item_code
    sale_item.product_name = item.item_name + "(promotion)"
    sale_item.product_alt_name = item.alt_name
    sale_item.account_id = item.account_id
    sale_item.remark = type
    sale_item.qty = qty * (-1)

    sale_item.unit_price = item_price # * (-1)
    sale_item.taxable_price = qty * item_price # * (-1)
    sale_item.price = qty * item_price * (-1)

    sale_item.is_taxable = 1
    sale_item.sale_id = sale_id
    sale_item.save
    sale =  Sale.find(sale_id)
    sale.compute_by_sale_items(sale.id, sale.sale_items, sale.total_discount)
  end


  def self.give_promotion_nett_off(same, promo_product, foc_min_qty, orderitem, sale_id)
    puts " same: " + same.to_s + " promo_product: " + promo_product.item_code.to_s + " foc_min_qty: " + foc_min_qty.to_s + " orderitem: " + orderitem.to_s

    if same
       foc_qty = orderitem[1].to_i / foc_min_qty
       item = OrderItem.find_by_item_instance_code(orderitem[0])
       update_existing_item(foc_qty, item, sale_id, "promotion nett off", promo_product.net_off)
    else
      foc_qty = find_second_item_qty(sale_id, promo_product.item_code)
      item = OrderItem.find_by_item_instance_code(promo_product.item_code)
      update_existing_item(foc_qty, item, sale_id, "promotion nett off", promo_product.net_off)
    end
  end

  def self.give_promotion_nett_price(same, promo_product, foc_min_qty, orderitem, sale_id)
    puts " same: " + same.to_s + " promo_product: " + promo_product.item_code.to_s + " foc_min_qty: " + foc_min_qty.to_s + " orderitem: " + orderitem.to_s

    if same
      foc_qty = orderitem[1].to_i / foc_min_qty
       item = OrderItem.find_by_item_instance_code(orderitem[0]) # need to specify with menu item instance
       price = item.price.to_i - promo_product.net_price.to_i
       update_existing_item(foc_qty, item, sale_id, "promotion nett price", price)
    else
      foc_qty = find_second_item_qty(sale_id, promo_product.item_code)
      item = OrderItem.find_by_item_instance_code(promo_product.item_code)
      price = item.price - promo_product.net_price
      update_existing_item(foc_qty, item, sale_id, "promotion nett price", price)
    end
  end

  def self.give_promotion_discount(same, promo_product, foc_min_qty, orderitem, sale_id)
    puts " same: " + same.to_s + " promo_product: " + promo_product.item_code.to_s + " foc_min_qty: " + foc_min_qty.to_s + " orderitem: " + orderitem.to_s

    if same
      foc_qty = orderitem[1].to_i / foc_min_qty
       item = OrderItem.find_by_item_instance_code(orderitem[0])
      #  total = orderitem[1].to_i * item.price
       total = item.price
       price = calculate_discount(total, promo_product.percentage)
       update_existing_item(foc_qty, item, sale_id, "promotion discount", price)
    else
      foc_qty = find_second_item_qty(sale_id, promo_product.item_code)
      # give total qty is 1
      #foc_qty = (foc_qty - foc_qty) + 1

      item = OrderItem.find_by_item_instance_code(promo_product.item_code)
      # total = item.price * foc_qty
      total = item.price
      price = calculate_discount(total, promo_product.percentage)
      update_existing_item(foc_qty, item, sale_id, "promotion discount", price)
    end
  end

 def self.find_second_item_qty(sale_id, promo_item)
   saleObj = Sale.find_by_sale_id(sale_id)
   itemList = combine_item(saleObj)
   itemList.each do |item|
     item.each do |i|
        if i[0] == promo_item
           return i[1]
        end
     end
   end
   return 0
 end

 def self.calculate_discount(total, discount)
    return (total.to_i * discount.to_i) / 100
 end
end