package ShoppingCart;

import java.util.ArrayList;
import java.util.Scanner;

public class Main 
{
	public static void main(String[] args) 
	{
		Scanner in=new Scanner(System.in);
		System.out.print("请输入账号和密码:");
		User[] use =new User[3];		
		use[0] = new User("a","a");
		use[1] = new User("b","b");
		use[2] = new User("c","c");
		User user = new User(in.next(),in.next());
		int b=0;
		for (int i = 0; i < use.length; i++) 
		{
			if(user.getUsername().equals(use[i].getUsername())&&user.getPassword().equals(use[i].getPassword()))
			{
				Goods[] good=new Goods[3];
				good[0] = new Goods(0,"aaa",1.1);
				good[1] = new Goods(1,"bbb",2.2);
				good[2] = new Goods(2,"ccc",3.3);
				System.out.println("商城商品如下：");
				for (Goods e : good) 
				{
					System.out.printf("编号:%d  商品名:%s  价格:%.1f",e.getNumber(),e.getName(),e.getPrice());
					System.out.println();
				}
				int a=1;
				while(true)
				{
					System.out.print("1.购买  2.删除  3.结算");
					System.out.println();
					System.out.print("请输入选择:");
					String aaa = in.next();
					switch (aaa) 
					{
						case "1":
							System.out.print("如需购买请输入商品编号及购买数量：");
							int aa = in.nextInt();
							good[aa].setSum(in.nextInt());
							user.shopping.addGoods(good[aa]);
							break;
						case "2":
							System.out.print("如需删除请输入商品编号：");
							int bb = in.nextInt();
							user.shopping.deleteGoods(good[bb]);
							break;
						case "3":
							a=2;
							break;
						default:
							break;
					}
					if (a==2)
						break;
					
				}
				user.shopping.showCart();
				user.shopping.showTotal();
			}
			else
				b++;
		}
		if (b==use.length)
			System.out.println("账号或密码错误!");
	}
}

class User
{
	private String username;
    private String password;
    //ShoppingCart shopping;
    ShoppingCartArray shopping;
    //其他信息
	public String getUsername() 
	{
		return username;
	}
	public void setUsername(String username) 
	{
		this.username = username;
	}
	public String getPassword() 
	{
		return password;
	}
	public void setPassword(String password) 
	{
		this.password = password;
	}
	public User(String username, String password) 
	{
		super();
		this.username = username;
		this.password = password;
		//this.shopping = new ShoppingCart();
		this.shopping = new ShoppingCartArray();
	}
    
}

class Goods
{
	private String name;
	private double price;
	private int number;
	private int sum;
	public Goods(int number, String name, double price) 
	{
		super();
		this.number = number;
		this.name = name;
		this.price = price;
	}
	
	public int getSum() {
		return sum;
	}

	public void setSum(int sum) {
		this.sum = sum;
	}

	public String getName() 
	{
		return name;
	}
	public void setName(String name) 
	{
		this.name = name;
	}
	public double getPrice() 
	{
		return price;
	}
	public void setPrice(double price) 
	{
		this.price = price;
	}
	public int getNumber() 
	{
		return number;
	}
	public void setNumber(int number) 
	{
		this.number = number;
	}
}

interface ShoppingCartDao
{
	public void addGoods(Goods goods);
	public void deleteGoods(Goods goods);
	public void showTotal();
	public void showCart();
}

class ShoppingCartArray implements ShoppingCartDao
{
	Goods[] array = new Goods[100];
	int b=0;
	public void addGoods(Goods goods) 
	{
		int a=0;
		for (int i = 0; i < array.length; i++) 
		{
			if(goods.equals(array[i]))
				a=1;
		}
		if(a==0)
			array[b++]=goods;
		else
			System.out.println("商品已在购物车中!");
	}
	public void deleteGoods(Goods goods)
	{	
		int a=0;
		for (int i = 0; i < array.length; i++) 
		{
			if(goods.equals(array[i]))
				a=i;
		}
		if(a!=0)
		{
			for(int j=a;j<array.length-1;j++)
				array[j]=array[j+1];
			b--;
		}		
		else
			System.out.println("未选购此商品!");
	}
	public void showTotal()
	{
		double a=0;
		for (int i = 0; i < b; i++) 
		{
			a=a+array[i].getPrice()*array[i].getSum();
		}
		System.out.print("总价:");
		System.out.printf("%.1f",a);
	}
	public void showCart()
	{
		if(array.length==0)
			System.out.println("未添加商品！");
		else
		{
			System.out.println("购物车内商品如下：");
			for (int i = 0; i < b; i++) 
			{
				System.out.printf("商品名:%s  价格:%.1f  购买数:%d",array[i].getName(),array[i].getPrice(),array[i].getSum());
				System.out.println();
			}
		}
	}
}

//class ShoppingCart implements ShoppingCartDao
//{
//	ArrayList<Goods> goodslist = new ArrayList<Goods>();
//	public void addGoods(Goods goods) 
//	{
//		if(!goodslist.contains(goods))
//			goodslist.add(goods);
//		else
//			System.out.println("商品已在购物车中!");
//	}
//	public void deleteGoods(Goods goods)
//	{
//		if(goodslist.contains(goods))
//			goodslist.remove(goods);
//		else
//			System.out.println("未选购此商品!");
//	}
//	public void showTotal()
//	{
//		double a=0;
//		for (Goods e : goodslist) 
//		{
//			a=a+e.getPrice()*e.getSum();
//		}
//		System.out.print("总价:");
//		System.out.printf("%.1f",a);
//	}
//	public void showCart()
//	{
//		if(goodslist.size()==0)
//			System.out.println("未添加商品！");
//		else
//		{
//			System.out.println("购物车内商品如下：");
//			for (Goods e : goodslist) 
//			{
//				System.out.printf("商品名:%s  价格:%.1f  购买数:%d",e.getName(),e.getPrice(),e.getSum());
//				System.out.println();
//			}
//		}
//	}
//}