class InventoryDefinition < ApplicationRecord

  scope :active, -> {where(:is_active => true)}

  def self.calculate_product_count(saleObj=nil,saleobj_after_req_bill=nil)
    if !saleObj.nil?
      saleObj.sale_items.each do |item|
        found, inventory_definition = find_product_in_inventory(item)
        if found
          check_balance(item,inventory_definition)
        end
      end
    else
      saleobj_after_req_bill.each do |item|
        found, inventory_definition = find_product_in_inventory(item)
        if found
          check_balance(item,inventory_definition)
        end
      end
    end
  end

  def self.find_product_in_inventory(item)
    product = InventoryDefinition.find_by_item_code(item.item_instance_code)
    if product.nil?
      return false, nil
    else
      stock_check_item = StockCheckItem.find_by_item_code(item.item_instance_code)
      if stock_check_item.nil?
        return false, nil
      else
        return true, product
      end
    end
  end

  def self.check_balance(item,inventory_definition) # item => saleItemOBj
     stock = StockJournal.where('item_code=?', item.item_instance_code).order('created_at desc').take
     unless stock.nil?
       modify_balance(item, stock, inventory_definition)
     else
       StockJournal.add_to_journal(item, 0, "out of stock", inventory_definition)
     end
  end

  def self.modify_balance(item, stock, inventory_definition) #saleitemObj
     if stock.balance.to_i >= item.qty
       puts ">> stock is greater than order qty"
       StockJournal.add_to_journal(item, stock.balance, "ok", inventory_definition)
     else
       puts " << stock is less than order qty"
       item_data = item
        if stock.balance.to_i > 0
          item_data.qty = item.qty.to_i - stock.balance.to_i
          StockJournal.add_to_journal(item_data, stock.balance, "out of stock", inventory_definition)
          item.qty = stock.balance.to_i
          StockJournal.add_to_journal(item, stock.balance, "ok", inventory_definition)
        else
          StockJournal.add_to_journal(item_data, stock.balance, "out of stock", inventory_definition)
        end
     end
  end
end