import java.util.ArrayList;
import java.util.Iterator;
import java.util.HashMap;

/**
 * Library to organize books
 *
 * @author (redacted)
 * @version (0.21)
 */
public class BookLibrary
{
    //ArrayList to store book objects
    private ArrayList<Book> library;

    //Creates a Library
    public BookLibrary()
    {
        library = new ArrayList<>();
    }

    public void addBook(Book book)
    {
    library.add(book);
    }

    //Adds book to library
    public void addBook(String author, String title,String publisher,int pages, int year,String ean,Boolean rented)
    {
        library.add(new Book(title,author,year,publisher,pages,ean,rented));
    }

    //Searches through the library and returns first book matching the string "title"
    public Book findBook(String title)
    {
        boolean notFound = true;
        Iterator<Book> it = library.iterator();
        Book book = null;
        while(it.hasNext()&& notFound)
        {
            Book b = it.next();

            if(b.getTitle().toLowerCase().equals(title.toLowerCase()))
            {
                    book = b;
                    notFound = false;
            }
        }
        return book;
    }

    public Book findBookByEan(String ean)
    {
        boolean notFound = true;
        Iterator<Book> it = library.iterator();
        Book book = null;
        while(it.hasNext()&& notFound)
        {
            Book b = it.next();

            if(b.getEan().toLowerCase().equals(ean.toLowerCase()))
            {
                    book = b;
                    notFound = false;
            }
        }
        return book;
    }
    //Goes down the library and returns all books where the author matches the string "author" in a HashMap
    public HashMap booksFromAuthor(String author)
    {
        HashMap<Double,Book> collection = new HashMap<>();
        Iterator<Book> it = library.iterator();
        double index = 1;
        while(it.hasNext())
        {
            Book b = it.next();
            if(b.getAuthor().toLowerCase().equals(author))
            {
                collection.put(index,b);
                index++;
            }
        }
        return collection;
    }

    public void removeBook(String title)
    {
     Iterator<Book> it = library.iterator();
     boolean notFound =true;
     while(it.hasNext() && notFound)
     {
     Book b = it.next();
     if(b.getTitle().toLowerCase().equals(title))
     {library.remove(b);
      notFound= false;
        }
     }
    }

    //Returns iterator to go through the library
    public Iterator<Book> getIterator()
    {
        Iterator <Book> it = library.iterator();
        return it;
    }

    //Goes down the library and returns the first book with a matching title
    public int findIndexByName(String title)
    {
        boolean notFound = true;
        int ind = 0;
        int bookIndex = 9999999;

        while(notFound == true && ind < library.size())
        {
            Book book = library.get(ind);

            if(title.equals(book.getTitle()))
            {
                notFound = false;
                bookIndex = ind;
            }
            ind++;
        }
        return bookIndex;
    }

    //Returns title of book with index "index"
    public void getTitle(int index)
    {
        Book book = library.get(index);
        System.out.println(book.getTitle());
    }

    //Returns author of book with index "index"
    public void getAuthor(int index)
    {
        Book book = library.get(index);
        System.out.println(book.getAuthor());
    }

    //Returns year of book with index "index"
    public void getYear(int index)
    {
        Book book = library.get(index);
        System.out.println(book.getYear());
    }

    //Returns pages of book with index "index"
    public void getPages(int index)
    {
        Book book = library.get(index);
        System.out.println(book.getPages());
    }

    //Returns publisher of book with index "index"
    public void getPublisher(int index)
    {
        Book book = library.get(index);
        System.out.println(book.getPublisher());
    }


    //Prints all books in the library
    public void listAllBooks()
    {
        Iterator<Book> it = library.iterator();

        while(it.hasNext())
        {
            Book book = it.next();
            System.out.println(book.getTitle());
        }
    }

    //Adds 6 books to the library for testing
    public void tester()
    {
        library.add(new Book("The Hunger Games", "Suzanne Collins", 2008,"Scholastic Corporation" , 374,"1627384950843",false));
        library.add(new Book("Gone", "Michael Grant", 2008, "HarperCollins", 576,"1029384756648",false));
        library.add(new Book("Harry Potter", "J. K. Rowling", 1997,"Schooltastic" , 309,"6574839201985",false));
        library.add(new Book("BlueJ", "David J. Barnes and Michael Kölling", 2003,"Pearson" , 630,"1920384756123",false));
        library.add(new Book("The Hobbit", "J.R.R. Tolkien", 1937,"Allen & Unwin" , 310,"1230987654321",false));
        library.add(new Book("S","Michael Grant",12,"",1, "1234567890123",false));
    }

    }