package com.company;

import javax.sound.midi.Soundbank;
import java.util.Scanner;

public class BookManage {
    BookSet bookSet = new BookSet();

    public void initial() {
        Book jichujiaochen = new Book();
        jichujiaochen.setBook("java基础教程", 0, 2015 - 7 - 1);

        Book shuju = new Book();
        shuju.setBook("数据库技术", 1, 0);

        Book renyue = new Book();
        shuju.setBook("人月神话", 1, 0);

        bookSet.books[0] = jichujiaochen;
        bookSet.books[1] = shuju;
        bookSet.books[2] = renyue;
    }

    public void startMenu() {
        boolean flag = true;
        do {
            System.out.println("*********************");
            System.out.println("1 查看图书");
            System.out.println("2 新增图书");
            System.out.println("3 删除图书");
            System.out.println("4 借出图书");
            System.out.println("5 归还图书");
            System.out.println("6 退 出");
            System.out.println("*********************");
            Scanner scanner = new Scanner(System.in);
            System.out.println("请选择");

            int gongnengbianhao = scanner.nextInt();
            switch (gongnengbianhao) {
                case 1:
                    System.out.println("查看图书信息");
                    chakan();  //调用查看商品信息的方法
                    break;
                case 2:
                    System.out.println("新增图书信息");
                    add();
                    break;
                case 3:
                    System.out.println("删除图书信息");
                    delete();
                    break;
                case 4:
                    System.out.println("借出图书");
                    break;
                case 5:
                    System.out.println("归还图书");
                    break;
                case 6:
                    System.out.println("退出系统");
                    exit();
                    flag = false;
                    break;
                default:
                    System.out.println("你输入的有误");
                    break;

            }
        } while (flag);
    }

    public void exit() {
        System.out.println("退出");
    }

    //卖出商品
    public void sell(){
        /*
         sout(卖出名称）
           scanner = new Scanner
             name = sc.next()
              for(; int i < length ;)
                    articles[i] .equals( name ) )
                     接受卖出的数量
                    int num = sc.nextInt();
                    if (num <kucun)
                    新库存 = 原库存 - num
                    新卖出 = 就卖出 +num
                    sout"卖出成功"
         */
        System.out.println("输入你要卖出的商品名称:");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.next();
        for (int i = 0; i < bookSet.books.length; i++){
            if(bookSet.books[i].name.equals(name)){
                System.out.println("输入卖出的数量");
                int shoumai = scanner.nextInt();
                if( shoumai < bookSet.books[i].state){
                    bookSet.books[i].state = bookSet.books[i].state - shoumai;
                    bookSet.books[i].state = bookSet.books[i].state + shoumai;
                }
                System.out.println("售卖成功");
                break;


            }
        }



    }


    //删除商品
    public void delete(){
        System.out.println("亲输入你要删除的商品编号");
        Scanner scanner = new Scanner(System.in);
        int delNo = scanner.nextInt();
        for(int i = 0; i < bookSet.books.length;i++) {
            if (bookSet.books[i] != null && (i + 1) == delNo) {//数组中的元素存在&&找到要删除的元素i
                int j = i;
                while (bookSet.books[j + i] != null) {// 要移动的元素后一个位置不为空，不执行以下操作
                    bookSet.books[j] = bookSet.books[j + i]; //把后面元素的值覆盖在前面的元素上
                    j++;
                }
                bookSet.books[i] = null; // 最后一个元素手动修改为空
                System.out.println("删除成功！");
            }else {
                System.out.println("删除失败！");
            }
        }
    }

    // 查看
    public void chakan() {
        System.out.println("编号:\t 名称 \t 状态 \t 日期");
        for (int i = 0; i < bookSet.books.length; i++) {
            if (bookSet.books[i] != null) {
                bookSet.books[i].print(i + 1);
            }
        }
    }

    // 添加
    public void add() {
        System.out.println("请输入图书名称");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.next();

        System.out.println("请输入状态");
        double zt = scanner.nextDouble();

        System.out.println("请输入日期");
        int riqi = scanner.nextInt();

        Book newBook = new Book();

        newBook.setBook(name, (int) zt, riqi);

        for (int i = 0; i < bookSet.books.length; i++) {
            if (bookSet.books[i] == null) {
                bookSet.books[i] = newBook;
                break;
            }


        }
    }
}