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

public class ChooseWord {

    /*Fonction pour choisir le mot selon la difficulté*/
    public static String chooseTheWord(String difficulty) {
        String filename = getFilenameByDifficulty(difficulty);
        List<String> words = new ArrayList<>();

        try (BufferedReader reader = new BufferedReader(new FileReader(filename))) {
            String line;
            while ((line = reader.readLine()) != null) {
                if (!line.trim().isEmpty()) {
                    String word = line.trim().toLowerCase();
                    // Filtre selon la difficulté
                    if (isValidForDifficulty(word, difficulty)) {
                        words.add(word);
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        if (words.isEmpty()) {
            return "default";
        }

        Random rand = new Random();
        return words.get(rand.nextInt(words.size()));
    }

    private static String getFilenameByDifficulty(String difficulty) {
        switch (difficulty.toLowerCase()) {
            case "facile": return "motsFacile.txt";
            case "moyen": return "motsMoyen.txt";
            case "difficile": return "motsDifficiles.txt";
            default: return "motsFacile.txt";
        }
    }

    private static boolean isValidForDifficulty(String word, String difficulty) {
        switch (difficulty.toLowerCase()) {
            case "facile":
                return word.length() < 8 && !word.contains(" ");
            case "moyen":
                return word.length() >= 8 && !word.contains(" ");
            case "difficile":
                return word.contains(" "); // Phrases avec espaces
            default:
                return true;
        }
    }
}