import java.util.*;

public class MiniDVD {

public static void main(String[] args){

//扫描器

Scanner input = new Scanner(System.in);

//Create four arrays with length of 7

int date[] = new int[7]; 

int count[] = new int[7];

String name[] =new String[7];

String state[] = new String[7];

name[0] = "罗马假日";

state[0] = "已借出";

date[0] = 1;

count[0] =15;

//Second DVD

name[1] = "风声鹤唳";

state[1] = "可借";

date[1] = 0;

count[1] =12;

//Third DVD

name[2] = "浪漫满屋";

state[2] = "可借";

date[2] = 0;

count[2] =30;

String choice = " ";

boolean flag = true;

do{

System.out.println("欢迎使用迷你DVD管理器");

System.out.println("------------------------------------------------------");

System.out.println("1.新增DVD");

System.out.println("2.查看DVD");

System.out.println("3.删除DVD");

System.out.println("4.借出DVD");

System.out.println("5.归还DVD");

System.out.println("6.退出DVD");

System.out.println("------------------------------------------------------");

System.out.print("请选择：");

choice = input.next();

switch (choice){

case "1":

System.out.println("--->新增DVD");

System.out.print("\n请输入DVD名称：");

boolean firstMonitor = true;

boolean secondMonitor = false;

String bookName = " ";

do{

bookName= input.next();

if(firstMonitor){

for(int i = 0; i<name.length; i++){

if(bookName.equals(name[i])){

System.out.println("货架上已经存在该DVD，请返回目录重新选择！");

secondMonitor = true;

break;

}

}

}

firstMonitor =false;

}while(firstMonitor);

if(!secondMonitor){

for (int j = 0;j<name.length; j++){

if((name[j])==null){

name[j]= bookName;

state[j] = "可借";

count[j] = 0;

System.out.println("新增《"+bookName+"》成功！");

System.out.println("***************************");

break;

}

if(name[name.length-2] !=null){

System.out.println("DVD货架已满，添加失败！");

System.out.println("***************************");

break;

}

}

}

break;

case "2":

System.out.println("--->查看DVD");

System.out.println("序号\t状态\t名称\t\t借出日期\t借出次数");

for (int i = 0; i<name.length; i++){

if(name[i] == null){

System.out.println("***************************");

break;

}

String myDate = " ";

if(date[i] != 0){

myDate = date[i]+"日";

}

System.out.println((i+1)+"\t"+state[i]+"\t"+"《"+name[i]+"》"+"\t"+myDate+"\t"+count[i]+"次");

}

break;

case "3":

System.out.println("--->删除DVD");

System.out.print("\n请输入DVD名称：");

String delName = input.next();

//define index monitor: check

int check = -1;

for(int i = 0; i < name.length; i++){

if(delName.equals(name[i])){

check = i;

break;

}

}

if(check != -1){

if(state[check].equals("可借")){

for(int j = check; j < name.length-1; j++){

name[j] = name[j+1];

state[j] = state[j+1];

date[j] = date[j+1];

count[j] = count[j+1];

}

System.out.println("删除《"+delName+"》成功！");

System.out.println("***************************");

break;

}else{

System.out.println("DVD为借出状态，不允许删除！");

System.out.println("***************************");

}

}else{

System.out.println("没有找到匹配信息！");

System.out.println("***************************");

}

break;

case "4":

System.out.println("--->借出DVD");

System.out.print("\n请输入DVD名称：");

String lendName = input.next();

//Initiate lendDate with 1, so as to enter the do-loop

System.out.print("请输入借出日期：");

do{

lendDate = input.nextInt();

if((lendDate<1)||(lendDate>31)){

System.out.print("必须输入大于等于1且小于等于31的数字，请重新输入：");

}

}while((lendDate<1)||(lendDate>31));

//define index monitor

int index = -1;

for(int i = 0; i < name.length; i++){

if(lendName.equals(name[i])){

index = i;

break;

}

}

//lend operation

if(index != -1){

if(state[index].equals("可借")){

state[index] = "已借出";

count[index] +=1;

date[index] = lendDate;

System.out.println("借出《"+lendName+"》成功！");

System.out.println("***************************");

}else{

System.out.println("《"+lendName+"》已被借出！");

System.out.println("***************************");

}

}else{

System.out.println("没有找到匹配信息！");

System.out.println("***************************");

}

break;

case "5":

System.out.println("--->归还DVD");

System.out.print("\n请输入DVD名称：");

String returnName = input.next();

//define index monitor

int monitor = -1;

for(int i = 0; i < name.length; i++){

if(returnName.equals(name[i])){

monitor = i;

break;

}

}

//Initiate myLendPeriod with 0, and enter the do-loop

int returnDate = 0;

int myLendPeriod = 0;

do{

System.out.print("请输入归还日期：");

//Avoid user input wrong date

do{

returnDate = input.nextInt();

if(monitor != -1){

myLendPeriod = returnDate - date[monitor];

}

if(returnDate > 31){

System.out.print("一个月只有31天，请重新输入：");

}

if(myLendPeriod < 0){

System.out.println("归还日期不能小于借出日期，请重新输入：");

}

}while((returnDate>31)||(myLendPeriod<0));

//Return operation

if(monitor != -1){

if(state[monitor].equals("已借出")){

state[monitor] = "可借";

date[monitor] = 0;

System.out.println("归还《"+returnName+"》成功！");

System.out.println("借出日期为："+date[monitor]+"日");

System.out.println("归还日期为："+returnDate+"日");

System.out.println("应付租金（元）："+myLendPeriod);

System.out.println("***************************");

}else{

System.out.println("该DVD没有被借出！无法进行归还操作。");

System.out.println("***************************");

}

}else{

System.out.println("没有找到匹配信息！");

System.out.println("***************************");

}

break;

}while(myLendPeriod < 0);

break;

case "6":

flag = false;

break;

default:

}

if(flag){

System.out.print("输入任意值返回:");

choice = input.next();

}

}while(flag);

//program exit

System.out.println("程序结束");

}

}