import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;

public class BookSystem extends JFrame {

    //Swing elements to for user interface
    JPanel panel;
    JButton btnAdd;
    JButton btnDelete;
    JButton btnSearch;
    JTextField txtTitle;
    JTextField txtAuthor;
    JTextField txtIsbn;
    JTextField txtPrice;
    JLabel lblTitle;
    JLabel lblAuthor;
    JLabel lblIsbn;
    JLabel lblPrice;


    //List to hold all stored instances of book class by BookSystem
    List<Book> storedBooks = new ArrayList<Book>();

    public BookSystem() {
        Book emptyBook = new Book();
        Book davinciCode = new Book("Davinci's Code","Leonardo Davinci","AAA31G",10);
        System.out.println("Empty book :");
        emptyBook.displayToConsole();
        System.out.println("Populated book : ");
        davinciCode.displayToConsole();

        initUI();
    }

    private void initUI() {
        //set up frame
        setSize(new Dimension(350,200));
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //setup panels for buttons and textfields
        JPanel labelAndTextPanel = new JPanel();
        labelAndTextPanel.setLayout(new GridLayout(2,4));
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new GridLayout(1,3));
        panel = new JPanel();
        panel.setLayout(new GridLayout(2,1));

        //setup all buttons, labels, textfields
        txtAuthor = new JTextField();
        txtIsbn = new JTextField();
        txtPrice = new JTextField();
        txtTitle = new JTextField();

        lblAuthor = new JLabel("Author");
        lblIsbn = new JLabel("ISBN Code");
        lblPrice = new JLabel("Price");
        lblTitle = new JLabel("Title");

        btnAdd = new JButton("Add");
        btnDelete = new JButton("Delete");
        btnSearch = new JButton("Search");

        //Action listeners to activate when buttons are clicked
        btnAdd.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                addBook();
            }
        });

        btnSearch.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                searchBook();
            }
        });

        btnDelete.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                deleteBook();
            }
        });

        //add elements to the panels
        buttonPanel.add(btnAdd);
        buttonPanel.add(btnDelete);
        buttonPanel.add(btnSearch);
        labelAndTextPanel.add(lblTitle);
        labelAndTextPanel.add(lblAuthor);
        labelAndTextPanel.add(lblIsbn);
        labelAndTextPanel.add(lblPrice);
        labelAndTextPanel.add(txtTitle);
        labelAndTextPanel.add(txtAuthor);
        labelAndTextPanel.add(txtIsbn);
        labelAndTextPanel.add(txtPrice);
        panel.add(labelAndTextPanel);
        panel.add(buttonPanel);

        setContentPane(panel);
        pack();
        setVisible(true);
    }

    private void addBook() {
        //create the book using information from text fields
        Book book = new Book();
        book.setAuthor(txtAuthor.getText());
        book.setIsbn(txtIsbn.getText());
        book.setTitle(txtTitle.getText());
        double price = Double.valueOf(txtPrice.getText());
        book.setPrice(price);

        //add the book to list of stored books
        storedBooks.add(book);

        //display the added book to console for debugging
        System.out.println("Book Added :");
        book.displayToConsole();
    }

    private void deleteBook() {
        double price = Double.valueOf(txtPrice.getText());
        String title = txtTitle.getText();
        String author = txtAuthor.getText();
        String isbn = txtIsbn.getText();

        //create an empty book to store the book to be removed
        Book bookToRemove = null;

        //look through all stored books to match with above information
        for(Book b : storedBooks) {
            if(b.getAuthor().equals(author) && b.getIsbn().equals(isbn) && b.getTitle().equals(title) && b.getPrice() == price) {
                bookToRemove = b;// new Book(b);
                break; //break out of array as we've found the book
            }
        }

        //remove the book if its found
        if(bookToRemove != null) {
            storedBooks.remove(bookToRemove);
            //display the removed book to console for debugging
            System.out.println("Book Deleted :");
            bookToRemove.displayToConsole();
            bookToRemove = null;
        }
    }

    private void searchBook() {
//        double price = Double.valueOf(txtPrice.getText());
//        String title = txtTitle.getText();
//        String author = txtAuthor.getText();
//        String isbn = txtAuthor.getText();
        System.out.println("Books Found :");
        for(Book b : storedBooks) {
            b.displayToConsole();
        }
    }

    private class Book {

        private String title = "";
        private String author = "";
        private String isbn = "";
        private double price = 0;

        //CONSTRUCTOR WITH EMPTY PARAMETERS
        public Book() {

        }

        //CONSTRUCTOR WITH PARAMETERS
        public Book(String title, String author, String isbn, double price) {
            //Assign passed values to values of this class
            this.title = title;
            this.author = author;
            this.isbn = isbn;
            this.price = price;
        }

        //CONSTRUCTOR FROM ANOTHER BOOK
        public Book(Book that) {
            this.title = that.getTitle();
            this.author = that.getAuthor();
            this.isbn = that.getIsbn();
            this.price = that.getPrice();
        }

        //GETTERS AND SETTERS
        public String getTitle() {
            return title;
        }

        public String getAuthor() {
            return  author;
        }

        public  String getIsbn() {
            return  isbn;
        }

        public double getPrice() {
            return  price;
        }

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

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

        public void setIsbn(String isbn) {
            this.isbn = isbn;
        }

        public void setPrice(double price) {
            this.price = price;
        }

        //function to display book to console window
        public void displayToConsole() {
            System.out.println();
            System.out.println("Title : " + title);
            System.out.println("Author : " + author);
            System.out.println("ISBN : " + isbn);
            System.out.println("Price : " + price);
        }
    }

    public static void main(String[] args) {
        BookSystem system = new BookSystem();
    }
}