import java.util.Scanner;

/**
 * This class implements a virtual bookcase where users can store and 
 * retrieve books.
 * 
 * Illustrates:
 * - The use of private static methods
 * - The use of a switch statement
 * - The use of a do-while loop
 * 
 * @author alchambers
 * @version sp16
 */
public class BookController{

    /**
     * Prints a menu of the options and returns the user's choice
     * @param scan A Scanner that allows for reading from the keyboard
     * @return An integer representing the user's choice
     */
    private static int printMenuAndGetChoice(Scanner scan){
        System.out.println();
        System.out.println();        
        System.out.println("=== Bookcase ===");
        System.out.println("1. Add a book");
        System.out.println("2. Remove a book");
        System.out.println("3. Search for a book");
        System.out.println("4. Get a random book");        
        System.out.println("5. Promote a book");
        System.out.println("6. List books");
        System.out.println("7. Quit");
        System.out.print("Choose an option (1-7): ");

        int choice =  scan.nextInt();
        scan.nextLine(); // scans the newline
        return choice;
    }

    /**
     * Allows the user to add a book to the bookcase
     * @param scan A Scanner that allows for reading from the keyboard
     * @param list The book case
     */
    private static void optionOne(Scanner scan, BookCase list){
        System.out.print("Enter the title of the book: ");
        String title = scan.nextLine();
        System.out.print("Enter the author of the book: ");
        String author = scan.nextLine();
        list.addBook(title, author);
    }

    /**
     * Allows a user to remove a book from the bookcase
     * 
     */
    private static void optionTwo(Scanner scan, BookCase list){
        System.out.print("Enter the position of the book: ");
        int position = scan.nextInt();
        scan.nextLine(); // clear the <Enter> 
        list.removeBook(position);        
    }

    /**
     * Allows the user to determine whether a book is in the bookcase 
     * @param scan A Scanner that allows for reading from the keyboard
     * @param list The book case
     */        
    private static void optionThree(Scanner scan, BookCase list){
        System.out.print("Enter the title of the book: ");
        String title = scan.nextLine();
        boolean isPresent = list.containsBook(title);

        if(isPresent){
            System.out.println("Yes, the bookcase contains this book.");
        }
        else{
            System.out.println("No, the bookcase doesn't contain this book.");   
        }
    }

    /**
     * Recommends a random book to the user
     * @param list The book case
     */
    private static void optionFour(BookCase list){
        String title = list.getRandomBook();
        System.out.println("How about reading " + title);
    }

    /**
     * Promote a book
     */
    private static void optionFive(Scanner scan, BookCase list){
        System.out.print("Enter the position of the book: ");
        int position = scan.nextInt();
        list.promoteBook(position);        

        System.out.println("\nHere's the new list:");
        System.out.println(list.toString());        
    }

    /**
     * Prints the contents of the book case
     * @param list The book case
     */    
    private static void optionSix(BookCase list){
        System.out.println(list.toString());
    }

    /**
     * Controls the application
     */
    public static void main(String[] args){
        int choice = 0;        
        final int QUIT = 7;

        BookCase list = new BookCase();
        Scanner scan = new Scanner(System.in);

        // Loop until the user quits
        do{            

            // Get the user's selection
            choice = printMenuAndGetChoice(scan);

            // Call the appropriate methods
            switch(choice){
                case 1: 
                // Add a book
                optionOne(scan, list);
                break;
                case 2:
                // Remove a book
                optionTwo(scan, list);
                break;
                case 3:
                // Search for a book
                optionThree(scan, list);
                break;
                case 4:
                // Get a random book
                optionFour(list);
                break;

                case 5: 
                // Promote a book
                optionFive(scan, list);
                break;

                case 6: 
                // List books
                optionSix(list);
                break;

                default:
                break;
            } 

            System.out.println();
            System.out.println();

            // after the break, we continue here
        }while(choice != QUIT);

        System.out.println("Goodbye!");
    }    
}