class SaleItem < ApplicationRecord
  self.primary_key = "sale_item_id"
  
  #primary key - need to be unique generated for multiple shops
  before_create :generate_custom_id

  belongs_to :sale

  #compute items - discount, tax, price_change
  def compute_item
  end


  def self.get_order_items_details(sale_id)
    sale_orders = SaleOrder.where("sale_id=?",sale_id)
    if sale_orders
       sale_orders.each do |sale_order| 
        order_details = SaleItem.select("sales.total_discount as discount_amount,DATE_FORMAT(sales.receipt_date,'%Y-%m-%d %h:%m') as receipt_date,sales.cashier_name,sales.receipt_no,sale_items.product_name as item_name,sale_items.qty,sale_items.price,sale_items.unit_price as total_price")
           .joins("left join sales on sales.id = sale_items.sale_id")
           .where("sale_items.sale_id=?",sale_order.sale_id)     
        return order_details
      end
    else
      return false
    end
  end
  
  private
  def generate_custom_id
    self.sale_item_id = SeedGenerator.generate_id(self.class.name, "SLI")

  end
end