import java.util.Scanner;

public class ProductMaintApp
{
    // declare two class variables
    private static ProductDAO productDAO = null;
    private static Scanner sc = null;

    public static void main(String args[])
    {
        System.out.println("Welcome to the Product Maintenance application\n");
        
        // set the class variables
        productDAO = DAOFactory.getProductDAO();
        sc = new Scanner(System.in);

        // display the command menu
        displayMenu();

        // perform 1 or more actions
        String action = "";
        while (!action.equalsIgnoreCase("exit"))
        {
             // get the input from the user
             action = Validator.getString(sc, "Enter a commmand: ");
             System.out.println();

             if (action.equalsIgnoreCase("list"))
                 displayAllProducts();
             if else (action.equalsIgnoreCase("add"))
                 addProduct();
             if else (action.equalsIgnoreCase("del")|| action.equalsIgnoreCase("delete"))
                 deleteProduct();
             if else (action.equalsIgnoreCase("help") || action.equalsIgnoreCase("menu"))
                 displayMenu();
             if else (action.equalsIgnoreCase("exit"))
                 System.out.println("Bye.\n");
             else
                 System.out.println("Error! Not a valid command.\n");

        }
    }
 //****************************************************
    public static void displayMenu()
    {
         System.out.println("COMMAND MENU");
         System.out.println("list    - List all products");
         System.out.println("add     - Add a product");
         System.out.println("del     - Delete a product");
         System.out.println("help    - Show this product");
         System.out.println("exit    - Exit this application");

    }
    public static void displayAllProducts()
    {
         System.out.println("PRODUCT LIST");
         
              System.out.println(productDA0.getProductsString());
    }
    public static void addProduct()
    {
         String code = Validator.getString(sc, "Enter product code: ");
         String description = Validator.getString(sc, "Enter product description: ");
         double price = Validator.getDouble(sc, "Enter price: ");
    
         Product product = new Product();
                 product.setCode(code);
                 product.setDescription(description);
                 product.setPrice(price);
         productDAO.addProduct(product);

         System.out.println();
         System.out.println(description + " has been added.\n");
     }
     public static void deleteProduct()
     {
         String cod = Validator.getString(sc, "Enter product code to delete: ");
    
         Product p = productDAO.getProduct(code);
    
         System.out.println();
         if (p != null)
         {
             productDAO.deleteProduct(p);
             System.out.println(p.getDescription() + " has been deleted.\n");

         }
         else
         {
             System.out.println("No product matches that product code.\n");

         }

     }

}