package com.library.main;

import com.library.models.BookDirectory;
import com.library.models.Rent;
import com.library.service.Alert;
import com.library.service.FileGenerator;
import com.library.service.UserRegistration;
import com.library.users.Customer;
import com.library.users.User;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class RunApplication {

    public static void main(String[] args) {
        BookDirectory bookDirectory = new BookDirectory();
        HashSet<User> userSet = new HashSet<User>();
        HashSet<Customer> customerSet = new HashSet<Customer>();
        FileGenerator.setBookDirectory(bookDirectory);
        UserRegistration.setUsers(userSet);
        UserRegistration.setCustomers(customerSet);
        Alert.setCustomers(customerSet);
    }
}

package com.library.models;

public class Author {

    private static int nextAuthorId = 0;

    private String name;
    private int id;

    public Author(String name) {
        this.name = name;
        id = nextAuthorId;
        nextAuthorId++;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}

package com.library.models;

public class Book {

    private BookTitle bookTitle;
    private int id;

    public Book(BookTitle bookTitle, int id) {
        this.bookTitle = bookTitle;
        this.id = id;
    }

    public BookTitle getBookTitle() {
        return bookTitle;
    }

    public String getTitle() {
        return getBookTitle().getTitle();
    }

    public void setTitle(String title) {
        this.getBookTitle().setTitle(title);
    }

    public Author getAuthor() {
        return getBookTitle().getAuthor();
    }

    public void setAuthor(Author author) {
        this.getBookTitle().setAuthor(author);
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

}

package com.library.models;

import com.library.users.Customer;

import java.io.FileWriter;
import java.io.IOException;
import java.time.LocalTime;
import java.time.Period;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;

public class BookDirectory {
    private ArrayList<Book> books;
    private HashSet<Author> authors;
    private HashSet<BookTitle> bookTitles;

    public void addBook(BookTitle bookTitle, int id) {
        Book newBook = new Book(bookTitle, id);
        books.add(newBook);
    }

    public boolean hasBook(Book book) {
        return books.contains(book);
    }

    public void deleteBook(Book book) {
        books.remove(book);
    }

    public void deleteAllBooks() {
        books.clear();
    }

    public int getBookCount() {
        return books.size();
    }

    public void addAuthor(String name) {
        authors.add(new Author(name));
    }

    public void clearBookDirectory() {
        books.clear();
        authors.clear();
    }

    public void addBookTitle(String title, Author author, int id) {
        bookTitles.add(new BookTitle(title, author, id));
    }

    public int getBookTitlesCount() {
        return bookTitles.size();
    }

    public String toString() {
        return books.toString();
    }

    public List<Book> getAllBooks() {
        return books;
    }

    public HashSet<BookTitle> getAllBookTitles() {
        return bookTitles;
    }

}

package com.library.models;

public class BookTitle {
    private String title;
    private Author author;
    private int id;

    public BookTitle(String title, Author author, int id) {
        this.title = title;
        this.author = author;
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public Author getAuthor() {
        return author;
    }

    public void setAuthor(Author author) {
        this.author = author;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}

package com.library.models;

import com.library.users.Customer;

import java.time.LocalDate;
import java.time.Period;

public class Rent {
    private Customer customer;
    private Book book;
    LocalDate dateOfRent;
    Period period;

    public Rent(Customer customer, Book book, Period period) {
        this.customer = customer;
        this.book = book;
        this.period = period;
        dateOfRent = LocalDate.now();
    }

    public Customer getCustomer() {
        return customer;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

    public Book getBook() {
        return book;
    }

    public void setBook(Book book) {
        this.book = book;
    }

    public LocalDate getDateOfRent() {
        return dateOfRent;
    }

    public void setDateOfRent(LocalDate dateOfRent) {
        this.dateOfRent = dateOfRent;
    }

    public Period getPeriod() {
        return period;
    }

    public void setPeriod(Period period) {
        this.period = period;
    }
}

package com.library.models;

public enum UserPrivilige {
    USER, ADMIN, SUPERADMIN
}

package com.library.service;

import com.library.models.Rent;
import com.library.users.Customer;
import com.library.users.User;

import java.time.LocalDate;
import java.time.Period;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

public class Alert {

    private static HashSet<Customer> customers;

    public ArrayList<Rent> getOverdueRents() {
        return getSoonOverdueRents(Period.ZERO);
    }

    public static HashSet<Customer> getCustomers() {
        return customers;
    }

    public static void setCustomers(HashSet<Customer> customers) {
        Alert.customers = customers;
    }

    public ArrayList<Rent> getSoonOverdueRents(Period period) {
        ArrayList<Rent> result = new ArrayList<Rent>();
        for (Customer customer : customers) {
            for (Rent rent : customer.getRentedBooks()) {
                if (rent.getDateOfRent().plus(rent.getPeriod()).isAfter(LocalDate.now().minus(period))) {
                    result.add(rent);
                }
            }
        }
        return result;
    }

    public ArrayList<Rent> getAllRents() {
        ArrayList<Rent> result = new ArrayList<Rent>();
        for (Customer customer : customers) {
            for (Rent rent : customer.getRentedBooks()) {
                    result.add(rent);
            }
        }
        return result;
    }
}

package com.library.service;

import com.library.models.UserPrivilige;
import com.library.users.User;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class Authentification {
    private Set<User> userSet;
    public Authentification(Set<User> userSet){
        this.userSet = userSet;
    }

    public boolean isLoginValid(String name, String password) {
        for (User user : userSet) {
            if (user.getName().equals(name) && user.getPassword().equals(password)) {
                return true;
            }
        }
        return false;
    }

    public boolean isAdmin(User user) {
        return user.getPrivilige().compareTo(UserPrivilige.ADMIN) >= 0;
    }
}

package com.library.service;

import com.library.models.Book;
import com.library.models.BookDirectory;
import com.library.models.BookTitle;
import com.library.models.Rent;
import com.library.users.Customer;
import com.library.users.User;

import java.io.FileWriter;
import java.io.IOException;
import java.time.LocalTime;
import java.util.HashSet;

public class FileGenerator {
    private static BookDirectory bookDirectory = null;

    public static BookDirectory getBookDirectory() {
        return bookDirectory;
    }

    public static void setBookDirectory(BookDirectory bookDirectory) {
        FileGenerator.bookDirectory = bookDirectory;
    }

    public static void createDirectoryBookListFile() {
        try {
            FileWriter fileWriter = new FileWriter("book_list_" + LocalTime.now().toString() + ".txt");
            fileWriter.write("TitletAuthortQuantityn");
            for (BookTitle bookTitle : bookDirectory.getAllBookTitles()) {
                Integer bookQuantity = 0;
                for (Book book : bookDirectory.getAllBooks()) {
                    if (book.getBookTitle().equals(bookTitle))
                        bookQuantity++;
                }
                fileWriter.write(bookTitle.getTitle() + "t" + bookTitle.getAuthor() +
                        "t" + bookQuantity.toString() + "n");
            }
            fileWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void createCustomerBookListFile(Customer customer) {
        try {
            FileWriter fileWriter = new FileWriter("book_list_" + customer.getName() + "_" +
                    LocalTime.now().toString() + ".txt");
            fileWriter.write("BooktDate of RenttRent Periodn");
            for (Rent rent : customer.getRentedBooks()) {
                fileWriter.write(rent.getBook().getTitle() + "t" + rent.getDateOfRent() +
                        "t" + rent.getPeriod() + "n");
            }
            fileWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

package com.library.service;

import com.library.models.Book;
import com.library.models.BookDirectory;

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

public class Search {
    private BookDirectory dir;

    public Search(BookDirectory dir) {
        this.dir = dir;
    }

    public List<Book> search(String phrase) {
        List<Book> results = new ArrayList<Book>();
        for (Book b : dir.getAllBooks()) {
            if (b.getAuthor().getName().equals(phrase) || b.getTitle().equals(phrase))
                results.add(b);
        }
        return results;
    }
}

package com.library.service;

import com.library.users.Customer;
import com.library.users.User;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class UserRegistration {
    private String name;
    private String email;
    private String password;

    private static HashSet<User> users;
    private static HashSet<Customer> customers;

    public static HashSet<User> getUsers() {
        return users;
    }

    public static void setUsers(HashSet<User> users) {
        UserRegistration.users = users;
    }

    public static HashSet<Customer> getCustomers() {
        return customers;
    }

    public static void setCustomers(HashSet<Customer> customers) {
        UserRegistration.customers = customers;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public boolean isRegistrationValid() {
        int nameLength = name.length();
        int passwordLength = password.length();
        boolean passwordHasDigit = password.matches("\d+");
        boolean isEmailValid = email.matches("^[a-zA-Z0-9._+-]+@[a-zA-Z._-]+.[a-zA-Z0-9]]$");
        return nameLength > 3 && passwordLength > 6 && passwordHasDigit && isEmailValid;
    }

    public boolean registerUser() {
        if (isRegistrationValid()) {
            boolean isNameFree = true;
            for (User user : users) {
                if (user.getName().equals(name)) {
                    isNameFree = false;
                    break;
                }
            }
            if (isNameFree) {
                users.add(new User(name, email, password));
                return true;
            }
        }
        return false;
    }

    public boolean registerCustomer() {
        if (!registerUser())
            return false;
        customers.add(new Customer(name, email, password));
        return true;
    }

}

package com.library.users;

import com.library.models.Book;
import com.library.models.UserPrivilige;

import java.util.ArrayList;

public class User {
    protected String name;
    protected String email;
    protected String password;
    private int id;
    private UserPrivilige privilige = UserPrivilige.USER;
    private static int nextUserId = 0;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
        this.id = nextUserId;
        nextUserId++;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public UserPrivilige getPrivilige() {
        return privilige;
    }

    public void setPrivilige(UserPrivilige privilige) {
        this.privilige = privilige;
    }
}

package com.library.users;

import com.library.models.Book;
import com.library.models.BookDirectory;
import com.library.models.Rent;

import java.io.FileWriter;
import java.io.IOException;
import java.time.LocalTime;
import java.time.Period;
import java.util.ArrayList;

public class Customer extends User {

    private ArrayList<Rent> rentedBooks;
    private static BookDirectory bookDirectory;

    public Customer(String name, String email, String password) {
        super(name, email, password);
        rentedBooks = new ArrayList<Rent>();
    }

    public static BookDirectory getBookDirectory() {
        return bookDirectory;
    }

    public static void setBookDirectory(BookDirectory bookDirectory) {
        Customer.bookDirectory = bookDirectory;
    }

    public ArrayList<Rent> getRentedBooks() {
        return rentedBooks;
    }

    public boolean rentBook(Book book, Period period) {
        if (bookDirectory.hasBook(book)) {
            getRentedBooks().add(new Rent(this, book, period));
            return true;
        }
        return false;
    }

    public void returnBook(Rent rent) {
        rentedBooks.remove(rent);
    }
}

package com.library.users;

import com.library.models.Author;
import com.library.models.Book;

public class Admin extends User {
    public Admin(String name, String email, String password) {
        super(name, email, password);
    }
}