import java.util.Scanner;
import java.io.*;

public class GameController {
    private static String username;
    private static String password;
    private static User currentUser;
    private static char selection = 'a';

    public static void main(String[] args)
    {
        printMainMenu(); //prints the main menu with all the options
    }

        public void Game()
        {}

        public static void printMainMenu()
        {
            boolean inputError=true;
            Scanner scan = new Scanner(System.in);
            while (inputError)
            {
                printMenu();//prints Menu with different options
                selection = scan.next().charAt(0);
                selection = Character.toUpperCase(selection);//converts selection to upper case for code simplicity
                if ((selection == 'L')||(selection == 'R')||(selection =='A')||(selection == 'P')||(selection == 'B')||(selection == 'Q')||(selection == 'O'))
                {
                   switch(selection)
                    {
                        case 'L'://allows user to login, if registered. Only one user can be logged in at a given time.
                            login();
                            printMainMenu();
                            break;
                        case 'R'://allows user to register
                            register();
                            break;
                        case 'A'://displays information about game
                            printAbout();
                            printMainMenu();
                            break;
                        case 'P'://allows user to play one game at a time (of 10 questions)
                            play();
                            break;
                        case 'B': //will display leader board
                            System.out.println("\tNo content to display");
                            printMainMenu();
                            break;
                        case 'O'://allows user to logout, if logged in
                            if (currentUser !=null)
                            {
                                currentUser=null;
                                System.out.println("You have logged out!");
                            }
                            printMainMenu();
                            break;
                        case 'Q': //allows user to quit and saves information
                            System.out.println("Goodbye! See you soon!\n");
                            if (currentUser != null)
                            {
                                currentUser.saveData();
                            }
                            System.exit(0);
                            break;
                    }
                   inputError=false;
                }
                else //if user typed any other character other than L,R,P,B,A,Q,O
                    System.out.println("Invalid input!");
            }
        }

        public static void printMenu()//prints the menu
        {
          printMenuPoint(1);
          printMenuPoint(2);
          printMenuPoint(3);
          printMenuPoint(4);
          printMenuPoint(5);
          printMenuPoint(6);
          printMenuPoint(7);
          printMenuPoint(8);
          printMenuPoint(9);

        }
        public static void printMenuPoint(int x)//prints each point on the menu
        {
            Scanner scan = new Scanner(System.in);
            switch(x)
            {
                case 1:
                 System.out.println("Welcome to the Word Game");
                 break;
                case 2:
                 System.out.println("\t\tLogin (L)");
                 break;
                case 3:
                 System.out.println("\t\tRegister (R)");
                 break;
                case 4:
                 System.out.println("\t\tAbout (A)");
                 break;
                case 5:
                 System.out.println("\t\tPlay the Game (P)");
                 break;
                case 6:
                 System.out.println("\t\tShow the Leader Board (B)");
                 break;
                case 7:
                 System.out.println("\t\tLogout (if already logged in) (O)\n");
                 break;
                case 8:
                 System.out.println("\t\tQuit (Q)\n");
                 break;
                case 9:
                 System.out.println("Please choose an option: ");
                 break;

            }
        }

        public static void register()//allows new players to register by invoking mehtods in User class and storing information there
        {
          User usercaller = new User();
          usercaller.register();
          printMainMenu();
        }

        public static boolean login()//checks if a player has registered and validates credentials. Only one player can be logged in at a given time.
        {
            while (currentUser != null)
            {
            System.out.println("\nUser already logged in!");
            printMainMenu();
            }

            Scanner scan = new Scanner(System.in);
            System.out.println("\n\tEnter your username: ");
            username=scan.nextLine();

            System.out.println("\n\tEnter your password: ");
            password=scan.nextLine();

            User loginUser = new User(username, password);

            if (loginUser.isLoginCorrect())
            {
                currentUser = loginUser;
                return true;
            } else
            {
                System.out.println("Incorrect credentials, try again: ");
                return false;
            }
        }

        private static void play()//Allows user to play if he is logged in.
                                  //Displays question and possible answers and keeps track of current score
        {
            if (currentUser != null)
            {
                System.out.println("\tWelcome to the game!\n");
                for (int i = 0; i < 10; i++)
                {
                PlayGame playGame = new PlayGame();
                String[] question = playGame.getRandomQuestion();
                playGame.printQuestionDetails(question);

                System.out.println("Type in your answer between 1-4:");

                Scanner scan = new Scanner(System.in);
                int choice = scan.nextInt();
                boolean isCorrect = playGame.checkAnswer(choice);

                if (isCorrect)
                {
                    System.out.println("Correct!\n");
                    System.out.println (playGame.Feedback());//gives feedback on question
                    currentUser.increaseScore();//increments the current score
                    currentUser.printResults();
                }
                else if (choice==5)
                {
                    currentUser.increaseQuestionsSkipped();//increments questions skipped
                    currentUser.printResults();
                }
                else
                {
                    System.out.println("WRONG!");
                    currentUser.increaseWrongAnswers();//increments wrong answers
                    currentUser.printResults();
                }
                currentUser.increaseTimesPlayed();//increases times played (using counter)
                }
            System.out.println("Game over!\n");
            currentUser.printResults();
            currentUser.reset();
            printMainMenu();//returns to main menu where user can choose to play another game
            }
            else
            {
                System.out.println("\tYou must be logged in to play.\n");
                printMainMenu();
            }
        }
        private static void printAbout()//prints information about the game
        {
            System.out.println("This is a Vocabulary Builder game.");
            System.out.println("The purpose of this game is to help players learn the definition of a word by selection a synonym from a list of words offered to them.");
            System.out.println("It’s a fun way to learn English and you can compete against your friends and compare your high scores!");
        }

    }