/* ----------------------------------------------------------------------------
 * EAOP 1.0, 2002-12-19
 * (c) 2002 Remi Douence, Mario Sudholt; OBASCO group; EMN/INRIA; France
 * THIS SOFTWARE IS PROVIDED AS IS AND WITHOUT ANY WARRANTY
  -------------------------------------------------------------------------- */

import java.util.*;

class Javazon {

    public void trade() {
	System.out.println("Welcome to www.javazon.com");

	// scenario
	Customer c1 = new Customer("c1");
	Customer c2 = new Customer("c2");
	 
	Shop.javazon.add("p1", 10);
	Shop.javazon.add("p2", 20);
	
	for (int i = 0; i < 6; i++) {
	    c1.searchAll();
	    c1.searchByPrice(10);
	    c1.buy();
	    c2.searchAll();
	    c2.searchByName("p");
	    c2.buy();
	    c2.checkout();
	    c1.searchAll();
	    c1.searchByPrice(10);
	    c1.buy();
	    c1.checkout();
	    
	    Shop.javazon.processOrders();
	}
    }
}

class Product implements Cloneable {

    String name;
    float price;

    Product(String name, float price) {
	this.name = name;
	this.price = price;
    }
    public String toString() {
	return this.name + " costs " + this.price + " euros";
    }
}

public class Customer {

    String name;
    Set search;
    ShoppingCart shoppingCart;

    public Customer(String name) {
	this.name = name;
	this.shoppingCart = new ShoppingCart();
    }
    void searchAll() {
	this.search = Shop.javazon.searchAll();
    }
    void searchByName(String subName) {
	this.search = Shop.javazon.searchByName(this.search, subName);
    }
    void searchByPrice(float maxPrice) {
	this.search = Shop.javazon.searchByPrice(this.search, maxPrice);
    }
    void buy() {
	this.shoppingCart.add(this.search);
    }
    public void checkout() {
	Shop.javazon.bill(this);
    }
    public String toString() {
	return this.name;
    }
}

class Shop {

    static Shop javazon = new Shop();

    Set products;
    Vector orders;

    Shop() {
	this.products = new HashSet();
	this.orders = new Vector();
    }
    Shop add(String name, float price) {
	this.products.add(new Product(name, price));
	return this;
    }
    Set searchAll() {
	return new HashSet(this.products);
    }
    Set searchByName(Set previousSearch, String subName) {
	Set result = new HashSet();
	for (Iterator i = previousSearch.iterator(); i.hasNext(); ) {
	    Product p = (Product)(i.next());
	    if (p.name.indexOf(subName) != -1) {
		result.add(p);
	    }
	}
	return result;
    }
    Set searchByPrice(Set previousSearch, float maxPrice) {
	Set result = new HashSet();
	for (Iterator i = previousSearch.iterator(); i.hasNext(); ) {
	    Product p = (Product)(i.next());
	    if (p.price <= maxPrice) {
		result.add(p);
	    }
	}
	return result;
    }
    void bill(Customer customer) {
	this.orders.add(new Order(customer, customer.shoppingCart.products));
	customer.shoppingCart.products = new Vector();
    }
    public void processOrders() {
	for (Iterator i = this.orders.iterator(); i.hasNext(); ) {
	    ((Order)(i.next())).ship();
	    i.remove();
	}
    }
}

class ShoppingCart {

    Vector products;

    ShoppingCart() {
	this.products = new Vector();
    }
    void add(Set products) {
	for (Iterator i = products.iterator(); i.hasNext(); ) {
	    this.products.add(i.next());
	}
    }
    float total() {
	float total = 0;
        for (Iterator i = products.iterator(); i.hasNext();) {
	    Product p = (Product)(i.next());
	    total += p.price;
        }
	return total;
    }
}

class Order {

    Customer customer;
    Vector products;

    Order(Customer customer, Vector products) {
	this.customer = customer;
	this.products = products;
    }
    float total() {
	float total = 0;
        for (Iterator i = this.products.iterator(); i.hasNext();) {
	    Product p = (Product)(i.next());
            total += p.price;
        }
	return total;
    }
    public void ship() {
	String message = "shipping ";
	for (Iterator i = this.products.iterator(); i.hasNext(); ) {
	    message += i.next() + " ";
	}
	message += " to " + this.customer;
	System.out.println(message);
    }
}