package com.company;

import java.util.Scanner;
public class caidan {
ziliaoku yang = new ziliaoku();
Scanner scanner = new Scanner(System.in);

public void mi(){
    ziliaoku shu = new ziliaoku();
    shu.name = "java基础教程";
    shu.kk = 0;
    shu.shi = 2015-7-1;
    ziliaoku ju = new ziliaoku();
    ju.name = "数据库技术";
    ju.kk = 1;
    ju.shi = 0;
    ziliaoku ren = new ziliaoku();
    ren.shi = 0;
    ren.name = "人月神话";
    ren.kk = 1;
    yang.yan[0] = shu;
    yang.yan[1] = ju;
    yang.yan[2] = ren;
}
public void yi() {
    boolean flag = true;
    do {
        System.out.println("欢迎使用图书管理系统");
        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("请选择：");
        int ll = scanner.nextByte();
        switch (ll) {
            case 1 -> {
                System.out.println("查看图书");
                cha();
            }
            case 2 -> {
                System.out.println("新增图书");
                ww();
            }
            case 3 -> {
                System.out.println("删除图书");
                bb();
            }
            case 4 -> {
                System.out.println("借出图书");
                jj();
            }
            case 5 -> {
                System.out.println("归还图书");
                aa();
            }
            case 6 -> {
                System.out.println("谢谢使用");
                flag = false;
            }
            default -> System.out.println("输入不符合要求请重新输入!");
        }
    } while (flag);

}

public static void main(String[] args) {
    caidan bo = new caidan();
    bo.yi();
    bo.mi();
 }
public void cha(){
    System.out.println("编号\t书名\t借出\t日期");
    for (int i = 0; i<yang.yan.length;
         i++){
        if (yang.yan[i]!=null){
            yang.yan[i].pp(i+1);
        }
    }
}
public void ww(){
    System.out.println("新增图书的书名；");
    String name = scanner.next();
    System.out.println("新增图书的借出：");
    int kk = scanner.nextByte();
    System.out.println("新增图书的日期：");
    int shi = scanner.nextByte();
    ziliaoku uu = new ziliaoku();
    uu.shi = shi;
    uu.name = name;
    uu.kk = kk;
    for (int i = 0 ;i < yang.yan.length;i++){
        if (yang.yan[i]==null){
            yang.yan[i]=uu;
            break;
        }
    }
}
public void bb(){
    System.out.println("请输入书籍编号：");
    boolean flag = true;
    int cc = scanner.nextByte();
    for (int i = 0; i<yang.yan.length; i++){
        if (yang.yan[i]!=null&&(i+1)==cc){
            int j = i ;
            while (yang.yan[j+1]!=null){
                yang.yan[j] = yang.yan[j+1];
                j++;
            }
            yang.yan[j] = null;
            flag = true;
            break;
        }else {
            flag = false;
        }
    }
    if (flag){
        System.out.println("删除成功");
    }else {
        System.out.println("删除失败");
    }
}
public void jj(){
    System.out.println("请输入你要借走的书籍名字：");
    String name = scanner.next();
    boolean flag = true;
    for (int i= 0; i<yang.yan.length;i++){
        if (yang.yan[i]!=null&&yang.yan[i].name.equals(name)){
            System.out.println("请输入你要借走几本：");
            int ee = scanner.nextByte();
            yang.yan[i].kk = yang.yan[i].kk - ee;
            flag = true;
        }else {
            System.out.println("商品数量不够抓紧进货！");
            flag = false;
        }
        break;
    }
    if (flag){
        System.out.println("售卖成功");
    }else {
        System.out.println("售卖失败");
    }
}
public void aa(){
    System.out.println("归还图书的书名；");
    String name = scanner.next();
    System.out.println("归还图书的借出：");
    int kk = scanner.nextByte();
    System.out.println("归还图书的日期：");
    int shi = scanner.nextByte();
    ziliaoku uu = new ziliaoku();
    uu.shi = shi;
    uu.name = name;
    uu.kk = kk;
    for (int i = 0 ;i < yang.yan.length;i++){
        if (yang.yan[i]==null){
            yang.yan[i]=uu;
            break;
        }
    }
}

}