import java.io.*;
import java.util.*;
public class Restaruant{
   static int budget=100;
   static Scanner sc=new Scanner(System.in);
   public static int Menu(){
       System.out.println("1 - View Item menu");
       System.out.println("2 – Pay total due");
       System.out.println("3 – Add $5 in credit");
       System.out.println("4 – Clear order");
       int f=sc.nextInt();
       if(f==-1||(f>=1&&f<=4)){
           return f;
       }else{
           System.out.println("Please enter a valid option!");
           Menu();
       }
       return 0;
   }
   public static double ViewMenu(double total){
       int op;
       System.out.println("1) Toaster: $19.99\n(2) Coffee maker: $29.49\n(3) Waffle maker: $15.79\n(4) Blender: $24.99\n(5) Kettle: $$24.99\n(6) Go to the main menu");
       op=sc.nextInt();
       switch(op){
       case 6:
           System.out.printf("Your current total is: $%.2f\n",total);
           return total;
       case 1:
           System.out.println("You have added a Toaster maker to your order.");
           total+=19.99;
           break;
       case 2:
           System.out.println("You have added a Coffee maker to your order.");
           total+=29.49;
           break;
       case 3:
           System.out.println("You have added a Waffle maker to your order.");
           total+=15.79;
           break;
       case 4:
           System.out.println("You have added a Blender maker to your order.");
           total+=24.99;
           break;
       case 5:
           System.out.println("You have added a Kettle maker to your order.");
           total+=24.99;
           break;
       default:
           System.out.println("Invalid item number please try again");
       }
       return ViewMenu(total);
   }
   public static boolean PayTotalDue(double total){
       double temp=total;
       if(temp>50){
           temp-=temp*0.2;
           temp+=temp*0.085;
           //System.out.println(temp);
           if(temp<=budget){
               System.out.printf("Thank you! You saved: $%.2f ",(total+(total*0.085)-temp));
               System.out.printf("Your change is: $%.2f\n",(budget-temp));
               System.out.println("Your items will be on their way soon!");
           }else{
               System.out.println("Insufficient funds!");
               return false;
           }

       }else{
           temp+=temp*0.085;
           System.out.printf("Thank you! Your change is: %.2f\n",(budget-temp));
           System.out.println("Your items will be on their way soon!");
       }
       return true;
   }
   public static void main(String args[]){
       double total=0;
       int f;
       while(true){
           f=Menu();
           int end=0;
           switch(f){
             case 1:
                 total=ViewMenu(total);
                 break;
             case 2:
                 if(PayTotalDue(total)){
                   total=0;
                   end=1;
                  }
                  break;
             case 3:
                 budget+=5;
                  System.out.println("Credit available: $ "+budget);
                  break;
             case 4:
                 System.out.println("Current order balance has been cleared. Current due: $0.00 ");
                  total=0;
                  break;
             default:
                 break;
           }
           if(end==1){
              break;
           }
       }
   }
}