package com.test.library.newlib;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

//学生类
public class Students {

	private String sid;// 编号
	private String name;// 姓名
	private Map<Books, Integer> lendBooks = new HashMap<Books, Integer>();

	// 构造
	Students(String sid, String name) {
		this.sid = sid;
		this.name = name;
	}

	// get set方法
	public String getSid() {
		return sid;
	}

	public void setSid(String sid) {
		this.sid = sid;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Map<Books, Integer> getLendBooks() {
		return lendBooks;
	}

	public void setLendBooks(Map<Books, Integer> lendBooks) {
		this.lendBooks = lendBooks;
	}

	// int num:要借的数量 Books b:要借那本书
	public void lendBooks(Books b, int num) {
		Set<Books> keys = this.getLendBooks().keySet();
		for (Books temp : keys) {
			// 说明您曾经借过这本书
			if (temp.getBid().equals(b.getBid())) {
				this.getLendBooks().put(temp, this.getLendBooks().get(temp) + num);
				return;
			}
		}

		// 说明你没有借过这本书
		this.lendBooks.put(b, num);
	}

	// 展示所有借的图书
	public void showAllLendBooks() {
		Set<Books> set = this.getLendBooks().keySet();

		for (Books b : set) {
			System.out.println("图书编号：" + b.getBid() + " |书名：" + b.getName() + " 借书数量：" + this.getLendBooks().get(b));
		}
	}

	// 查询――从借的书本里根据图书id查询
	public Books getBooksByBid(String bid) {
		Set<Books> set = this.getLendBooks().keySet();

		for (Books b : set) {
			if (b.getBid().equals(bid)) {
				return b;
			}
		}
		return null;
	}

	public int getBooksNumByBook(Books b) {
		Set<Books> set = this.getLendBooks().keySet();

		for (Books temp : set) {
			if (temp.getBid().equals(b.getBid())) {
				return this.getLendBooks().get(temp);
			}
		}
		return -1;

	}

	public void returnBooks(Books b, int num) {
		this.getLendBooks().put(b, this.getLendBooks().get(b) - num);
	}

	public void returnBooks(Books b) {
		this.getLendBooks().remove(b);
	}

}