import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Random;
import java.util.Scanner;


public class LabExer {

    public static void main(String[] args) {
        String line = null;
        String[] wordArray = new String[15];
        Random rand = new Random();
        int randomNum = rand.nextInt(14);
        String randomWord = "";
        String tempWord = "";
        Scanner scanner = new Scanner(System.in);
        String userInput;
        int attemps = 0;
        try {
            // Path for txt file
            FileReader file = new FileReader("C:\\Users\\Xeb\\eclipse-workspace\\test\\asd\\src\\asd\\words.txt");
            BufferedReader buffer = new BufferedReader(file);
            int indexArr = 0;
            while ((line = buffer.readLine()) != null) {
                wordArray[indexArr] = line.trim(); // removing whitespace/blanks
                ++indexArr;
              }

            //Keep adding value until it's not empty or null
            while (randomWord.isEmpty() || randomWord == null) {
                randomWord = wordArray[randomNum].trim();
            }
            tempWord = randomWord;
            //Always have a blank of at least 50% of the word
            char getElementRand[] = new char[(randomWord.length() / 2)];

            //Replacing random characters
            for (int i = 0; i < getElementRand.length; i++) {
                randomWord = randomWord.replace(getElementRand[i] = randomWord.charAt(rand.nextInt(randomWord.length())), '?');
            }

            boolean isContinue = true;
            boolean isCorrect = false;
            boolean isWrong = false;
            System.out.println("Guess the word!\nType any number to quit\n\n");
            do {
                if(!randomWord.equalsIgnoreCase(tempWord)) {
                    System.out.println("== " + randomWord + " ==");
                    System.out.print("Input: ");
                    attemps++;
                    userInput = scanner.next().toUpperCase();

                    //Proceed if user input is not a number
                    if(!userInput.matches("\\d+")) {
                        //Keep looping until it goes through the whole word as character
                        //And if it finds an equal character, it will proceed
                        //else it's wrong
                        for (int i = 0; i < tempWord.length(); i++) {
                            if(userInput.equalsIgnoreCase(String.valueOf(tempWord.charAt(i)))) {
                                randomWord = randomWord.substring(0,i) + userInput + randomWord.substring(i+1);
                                isCorrect = true;
                            } else {
                                isWrong = true;
                            }
                        }

                        //Isolating the printing of correct and wrong answer
                        //To stop looping/repeating the print
                        if(isCorrect == true) {
                            System.out.println("Correct Answer!");
                            isCorrect = false;
                        } else if (isWrong == true) {
                            System.out.println("Wrong Answer! Please Try Again...");
                            isWrong = false;
                        }
                        System.out.println("----------------------------------------");
                    }
                    else { //Stop the program if user input is number
                        System.out.println("You Gave up! Better Luck Next Time...");
                        isContinue = false;
                    }
                }else { //Stops the program if user finished filling up the missing letters
                    System.out.println("Congratulation! You Filled up the Missing Letters!"
                                    + "\nThe Full Word is: " + tempWord
                                    + "\nAttemps: " + attemps);
                    isContinue = false;
                }
            } while (isContinue);
        } catch (FileNotFoundException e) {
            System.out.println(e.getMessage());
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }

    }
}