import java.util.Iterator;
import java.util.HashMap;
import java.util.Scanner;

/**
 * Write a description of class BookLibraryApp here.
 *
 * @author redacted
 * @version 0.1
 */
public class BookLibraryApp
{
private final int ADD_BOOK = 1;
private final int LIST_BOOK = 2;
private final int SEARCH_FOR_BOOK = 3;
private final int REMOVE_BOOK = 4;
private final int QUIT = 5;
private final BookLibrary lib;

public BookLibraryApp()
{
    this.lib = new BookLibrary();
}

public static void main(String[] args)
{
BookLibraryApp app = new BookLibraryApp();
app.init();
app.start();
}

private void addBookToLibrary()
{
String title = "";
String author = "";
String publisher = "";
int year = 0;
int pages = 0;
String ean = "";
boolean rented = false;
String r = null;
boolean validInput = true;

Scanner sc = new Scanner(System.in);

System.out.println("Please enter the required details about the book");
System.out.print("Enter book title: ");
title = sc.nextLine();
System.out.print("Enter book author: ");
author = sc.nextLine();
System.out.print("Enter book publisher: ");
publisher = sc.nextLine();
System.out.print("Enter book ean code: ");
ean = sc.nextLine();
System.out.print("Is this book rented? ");
r = sc.nextLine();
System.out.print("Enter book release year: ");
year = sc.nextInt();
System.out.print("Enter book page count: ");
pages = sc.nextInt();


if(r.contains("yes"))
{
rented = true;
}
else
{
rented = false;
}

Book b = new Book(title,author,year,publisher,pages,ean,rented);
this.lib.addBook(b);

System.out.println("The following book has been added to the library");
printBook(b);

}

private void printBook(Book b)
{
System.out.println("Title: " + b.getTitle());
System.out.println("Author: " + b.getAuthor());
System.out.println("Publisher: " + b.getPublisher());
System.out.println("Year: " + b.getYear());
System.out.println("Pages: " + b.getPages());
System.out.println("EAN: " + b.getEan());
System.out.println("Rent Status: " + b.getRentStatus());
}

private void removeBook()
{
Scanner sc = new Scanner(System.in);
boolean notFound = true;
System.out.println("Which book do you want to remove?");
String bookToRemove = sc.nextLine().toLowerCase();
System.out.println("Are you sure you wish to remove " + bookToRemove +"?");
if(sc.nextLine().toLowerCase().equals("yes"))
{
Iterator<Book> it = lib.getIterator();
while(it.hasNext() && notFound == true)
{
Book b = it.next();
if(b.getTitle().toLowerCase().equals(bookToRemove))
{
lib.removeBook(b.getTitle().toLowerCase());
notFound=false;
}
}
if(notFound)
{System.out.println("We could not find the book you wanted to delete");}
else
{System.out.println("The book " + bookToRemove + " has been deleted");}
}

}

private void start()
{
    Boolean finished = false;

    while(!finished)
    {
    int menuChoice = this.showMenu();

    switch (menuChoice)
        {
       case ADD_BOOK:
            addBookToLibrary();
            break;

       case LIST_BOOK:
            listAllBooks();
            break;

       case SEARCH_FOR_BOOK:
            searchForBook();
            break;

       case REMOVE_BOOK:
            removeBook();
            break;
       case QUIT:
            System.out.println("Thank you for using Book Library App\n");
            finished =true;
            break;

       default:
            System.out.println("You need to enter a valid input");
    }
    }
}

private void searchForBook()
{
Scanner sc = new Scanner(System.in);
int searchMethod = 0;

System.out.println("What method would you like to search with?");
System.out.println("1. Title");
System.out.println("2. Author");
System.out.println("3. EAN");

searchMethod = sc.nextInt();

switch(searchMethod)
{
 case 1:
 searchForBookByTitle();
 break;

 case 2:
 searchForBookByAuthor();
 break;

 case 3:
 searchForBookByEan();
 break;

 default:
 System.out.println("This method is not supported");

}
}


private void searchForBookByAuthor()
{
    Scanner sc = new Scanner(System.in);
    System.out.print("Which author do you want to search after? ");
    String authorA = sc.nextLine();
    String author = authorA.toLowerCase();
    HashMap<Double,Book> h = lib.booksFromAuthor(author);

    if(h.size() != 0)
    {
        System.out.println("Here are the books we found from " + authorA);
        for(double key : h.keySet())
        {
        System.out.println("" + h.get(key).getTitle());
        }
    }
    else
    {
        System.out.println("We could not find any books from " + authorA);
    }
}

private void searchForBookByEan()
{
    Scanner sc = new Scanner(System.in);
    System.out.print("Please write the EAN of the book you are looking for");
    String ean = sc.nextLine();
    Book b = lib.findBookByEan(ean);

    if(b != null)
    {
        System.out.println("The book " + ean + " was found");
        printBook(b);
        System.out.print("Was this the book you were looking for? ");
        if(sc.nextLine().equals("yes"))
        {
            System.out.print("Do you want to rent this book? ");
            if(sc.nextLine().equals("yes"))
            {
                if(!b.getRentStatus())
                {
                b.setRentStatus(true);
                System.out.println("You have now rented the book " + ean);
                System.out.println("Thank you for using Book Library App");
                }
                else
                {
                System.out.println("This book is currently rented out, please come back later");
                }
            }
        }
        else
        {
        System.out.println("Please try again, if that doesn't work please ask for help");
        }
    }
    else
    {
        System.out.println("We could sadly not find the book you were looking for");
    }
}

private void searchForBookByTitle()
{
Scanner sc = new Scanner(System.in);
System.out.print("Please write the title of the book you are looking for");
String title = sc.nextLine();
Book b = lib.findBook(title);

if(b != null)
{
    System.out.println("The book " + title + " was found");
    printBook(b);
    System.out.print("Was this the book you were looking for? ");
    if(sc.nextLine().equals("yes"))
    {
        System.out.print("Do you want to rent this book? ");
        if(sc.nextLine().equals("yes"))
        {
            if(!b.getRentStatus())
            {
            b.setRentStatus(true);
            System.out.println("You have now rented the book " + title);
            System.out.println("Thank you for using Book Library App");

            }
            else
            {
            System.out.println("This book is currently rented out, please come back later");
            }
        }
    }
    else
    {
        System.out.println("Please try again, if that doesn't work please ask for help");
    }
}
else
{
System.out.println("We could sadly not find the book you were looking for");
}
}

private void printWelcome()
{
System.out.println("\n***** Book Library Application v0.1\n\n");
System.out.println("1. Add book");
System.out.println("2. List all books");
System.out.println("3. Search for book");
System.out.println("4. Remove book");
System.out.println("5. Quit");
}

private int showMenu()
{
printWelcome();
int menuChoice = 0;
Scanner sc = new Scanner(System.in);


if (sc.hasNextInt())
{
menuChoice = sc.nextInt();
}
else
{
System.out.println("You must enter a number");
}
return menuChoice;
}

private Book rentBookByTitle(String title)
{
    Iterator<Book> it = lib.getIterator();
    Book b = null;
    Book r = null;
    boolean found = false;
    while(it.hasNext() && !found)
    {
        b = it.next();
        if(b.getTitle().equals(title))
        {
            if(!b.getRentStatus())
            {
                r = b;
                b.setRentStatus(true);
                found = true;
            }
            else
            {
                System.out.println("This book is sadly already rented out at the moment");
            }
        }
    }
    return r;
}

private void returnBook(String title)
{
    Iterator<Book> it = lib.getIterator();
    while(it.hasNext())
    {
        Book b = it.next();
        if(b.getTitle().equals(title))
        {
            if(b.getRentStatus())
            {
                b.setRentStatus(false);
                System.out.println("You have successfully returned the book " + title);
                System.out.println("We look forward to seing you next");
            }
            else
            {
                System.out.println("This book is not rented out");
            }
        }
    }
}

private void init()
{
    lib.tester();
}

private void listAllBooks()
{
    Iterator<Book> it = lib.getIterator();
    Book b = null;
    int amount = 0;
    System.out.println("> here are all books currently in the library");
    while(it.hasNext())
    {
        b = it.next();
        System.out.println("> " + b.getTitle());
        amount++;
    }
    System.out.println("> Books returned -> " + amount);
}

private Book test()
{
    return lib.getIterator().next();
}

}