public class LibraryManage {
    Scanner scanner = new Scanner(System.in);
    BookSet bookSet = new BookSet();
    SimpleDateFormat outBook = new SimpleDateFormat("yyyy-MM-dd");

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

        Book mysql = new Book();
        mysql.bookSet("数据库技术",true,"",0);

        Book renYue = new Book();
        renYue.bookSet("人月神话",true,"",0);

        bookSet.book[0] = java;
        bookSet.book[1] = mysql;
        bookSet.book[2] = renYue;
    }

    public void startMenu() {
        boolean flag1 = true;
        int choose;
        int fanhui;
        do {
            System.out.println("欢迎使用图书管理系统");
            System.out.println("——————————————————————————————————————————");
            System.out.println("1. 新增图书");
            System.out.println("2. 查看图书");
            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：");
            choose = scanner.nextInt();
            switch (choose) {
                case 1:
                    System.out.println("---> 新增图书");
                    add();
                    break;
                case 2:
                    System.out.println("---> 查看图书");
                    chakan();
                    break;
                case 3:
                    System.out.println("---> 删除图书");
                    delete();
                    break;
                case 4:
                    System.out.println("---> 借出图书");
                    out();
                    break;
                case 5:
                    System.out.println("---> 归还图书");
                    guihuan();
                    break;
                case 6:
                    System.out.println("---> 退   出");
                    break;
            }
            System.out.print("输入0返回：");
            fanhui = scanner.nextInt();


        }while( fanhui == 0 ) ;
    }

    private void add() {
        System.out.print("请输入图书名称：");
        String name = scanner.next();
        boolean flagDelete = true;
        int count = 0;
        String date = "";
        
        Book newBook = new Book();
        newBook.bookSet(name,flagDelete,date,count);
        for (int i = 0; i < bookSet.book.length; i++) {
            if ( bookSet.book[i] == null ) {
                bookSet.book[i] = newBook;
                break;
            }
        }
        System.out.println("增加" + newBook.name + "成功");
    }

    private void chakan() {
        System.out.println("序号 \t状 态 \t  名称  \t\t借出日期");
        for (int i = 0; i < bookSet.book.length; i++) {
            if ( bookSet.book[i] != null) {
                bookSet.book[i].print(i+1 );
            }
        }
        System.out.println("***********************************");
    }

    private void delete() {
        System.out.println("请输入你要删除图书的名称：");
        String deleteBookName = scanner.next();
        for (int i = 0; i < bookSet.book.length; i++) {
            if ( bookSet.book[i] != null ) {
                if ( deleteBookName.equals(bookSet.book[i].name) ) {
                    if (bookSet.book[i].flag ) {
                        int j = i;
                        while ( bookSet.book[j+1] != null ) {
                            bookSet.book[j] = bookSet.book[j+1];
                            j++;
                        }
                        bookSet.book[j] = null;
                        System.out.println("删除成功");
                    }else {
                        System.out.println("已借出的书不能删除");
                        break;
                    }
                }else {
                    System.out.println("图书馆不存在此书");
                    break;
                }

            }

        }


        }



    private void out() {
        System.out.print("请输入图书名称：");
        String bookName = scanner.next();
        String outDate;
        for (int i = 0; i < bookSet.book.length; i++) {
            if ( bookSet.book[i] !=null && bookName.equals(bookSet.book[i].name) ) {
                if ( bookSet.book[i].flag ) {
                    System.out.print("请输入借出日期(年-月-日)：");
                    outDate = scanner.next();
                    bookSet.book[i].count = bookSet.book[i].count + 1;
                    bookSet.book[i].bookSet(bookName,false,outDate,bookSet.book[i].count);
                    System.out.println("借出成功");
                    break;
                }else {
                    System.out.println("此书已被借走");
                }

            }
        }
    }

    private void guihuan() {
        System.out.print("请输入图书名称：");
        String guihuanBook = scanner.next();
        String guihuanBookDate;
        for (int i = 0; i < bookSet.book.length; i++) {

            if ( guihuanBook.equals(bookSet.book[i].name) ) {
                if ( bookSet.book[i].flag ) {
                    System.out.println(bookSet.book[i].name + "未借出");
                }else {
                    System.out.println("请输入归还日期：");
                    guihuanBookDate = scanner.next();
                    System.out.println("归还《" + bookSet.book[i].name + "》成功！");
                    System.out.println("借出日期为：" + bookSet.book[i].date);
                    System.out.println("归还日期为：" + guihuanBookDate);
                    System.out.println("应付租金（元）");
                }
                break;
            }else {
                System.out.println("图书馆不存在此书");
            }
        }

    }

}