import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

// Book class to represent a book
class Book {
    private String title;
    private String author;
    private String isbn;
    private boolean isAvailable;

    public Book(String title, String author, String isbn) {
        this.title = title;
        this.author = author;
        this.isbn = isbn;
        this.isAvailable = true;
    }

    // Getters
    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public String getIsbn() {
        return isbn;
    }

    public boolean isAvailable() {
        return isAvailable;
    }

    // Setters
    public void setAvailable(boolean isAvailable) {
        this.isAvailable = isAvailable;
    }

    @Override
    public String toString() {
        return "Title: " + title + ", Author: " + author + ", ISBN: " + isbn + ", Available: " + (isAvailable ? "Yes" : "No");
    }
}

// Library class to manage the collection of books
class Library {
    private List<Book> books;

    public Library() {
        this.books = new ArrayList<>();
    }

    // Add a new book to the collection
    public void addBook(Book book) {
        books.add(book);
    }

    // Borrow a book by ISBN
    public void borrowBook(String isbn) {
        for (Book book : books) {
            if (book.getIsbn().equals(isbn) && book.isAvailable()) {
                book.setAvailable(false);
                System.out.println("You have successfully borrowed the book: " + book.getTitle());
                return;
            }
        }
        System.out.println("The book with ISBN " + isbn + " is either not available or does not exist.");
    }

    // Return a book by ISBN
    public void returnBook(String isbn) {
        for (Book book : books) {
            if (book.getIsbn().equals(isbn) && !book.isAvailable()) {
                book.setAvailable(true);
                System.out.println("You have successfully returned the book: " + book.getTitle());
                return;
            }
        }
        System.out.println("The book with ISBN " + isbn + " is either not borrowed or does not exist.");
    }

    // Search for books by title
    public void searchBooksByTitle(String title) {
        for (Book book : books) {
            if (book.getTitle().equalsIgnoreCase(title)) {
                System.out.println(book);
            }
        }
    }

    // Search for books by author
    public void searchBooksByAuthor(String author) {
        for (Book book : books) {
            if (book.getAuthor().equalsIgnoreCase(author)) {
                System.out.println(book);
            }
        }
    }

    // Display all available books
    public void displayAvailableBooks() {
        for (Book book : books) {
            if (book.isAvailable()) {
                System.out.println(book);
            }
        }
    }
}

// Main class to demonstrate the library management system
public class LibraryManagementSystem {
    private static Scanner scanner = new Scanner(System.in);
    private static Library library = new Library();

    public static void main(String[] args) {
        while (true) {
            System.out.println("\nLibrary Management System Menu:");
            System.out.println("1. Add New Book");
            System.out.println("2. Borrow Book");
            System.out.println("3. Return Book");
            System.out.println("4. Search Books by Title");
            System.out.println("5. Search Books by Author");
            System.out.println("6. Display Available Books");
            System.out.println("7. Exit");
            System.out.print("Enter your choice: ");
            int choice = scanner.nextInt();
            scanner.nextLine(); // Consume newline

            switch (choice) {
                case 1:
                    addNewBook();
                    break;
                case 2:
                    borrowBook();
                    break;
                case 3:
                    returnBook();
                    break;
                case 4:
                    searchBooksByTitle();
                    break;
                case 5:
                    searchBooksByAuthor();
                    break;
                case 6:
                    displayAvailableBooks();
                    break;
                case 7:
                    System.out.println("Exiting the system.");
                    System.exit(0);
                    break;
                default:
                    System.out.println("Invalid choice. Please try again.");
            }
        }
    }

    private static void addNewBook() {
        System.out.print("Enter book title: ");
        String title = scanner.nextLine();
        System.out.print("Enter book author: ");
        String author = scanner.nextLine();
        System.out.print("Enter book ISBN: ");
        String isbn = scanner.nextLine();
        Book book = new Book(title, author, isbn);
        library.addBook(book);
        System.out.println("Book added successfully.");
    }

    private static void borrowBook() {
        System.out.print("Enter book ISBN to borrow: ");
        String isbn = scanner.nextLine();
        library.borrowBook(isbn);
    }

    private static void returnBook() {
        System.out.print("Enter book ISBN to return: ");
        String isbn = scanner.nextLine();
        library.returnBook(isbn);
    }

    private static void searchBooksByTitle() {
        System.out.print("Enter book title to search: ");
        String title = scanner.nextLine();
        library.searchBooksByTitle(title);
    }

    private static void searchBooksByAuthor() {
        System.out.print("Enter book author to search: ");
        String author = scanner.nextLine();
        library.searchBooksByAuthor(author);
    }

    private static void displayAvailableBooks() {
        System.out.println("Available books in the library:");
        library.displayAvailableBooks();
    }
}


/*
1
Life Lesson's
Pratik Mandalkar
123
1
Follow ur Dreams
Netra Mohekar
321
2
321
4
Life Lesson's
5
Netra Mohekar
3
321
6
7

 */