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

public class WordSelector {

    private static final Map<String, List<String>> wordsByDifficulty = new HashMap<>();

    /**
     * Charge la liste de mots pour une difficulté donnée depuis un fichier.
     */
    public static void loadWordsForDifficulty(String difficulty, String filename) {
        List<String> words = new ArrayList<>();
        try (BufferedReader reader = new BufferedReader(new FileReader(filename))) {
            String line;
            while ((line = reader.readLine()) != null) {
                String word = line.trim().toLowerCase();
                if (!word.isEmpty()) {
                    words.add(word);
                }
            }
        } catch (IOException e) {
            System.err.println("Error loading words from " + filename);
            e.printStackTrace();
        }
        wordsByDifficulty.put(difficulty.toLowerCase(), words);
    }

    /**
     * Retourne un mot aléatoire selon la difficulté ("easy", "medium", "hard").
     * Retourne "default" si aucun mot trouvé.
     */
    public static String pickWord(String difficulty) {
        List<String> words = wordsByDifficulty.get(difficulty.toLowerCase());
        if (words == null || words.isEmpty()) {
            return "default";
        }
        Random rand = new Random();
        return words.get(rand.nextInt(words.size()));
    }
}