flutter_wordle/lib/word_loader.dart

import 'dart:convert';
import 'dart:math';

import 'package:diacritic/diacritic.dart';
import 'package:flutter/services.dart';
import 'package:shared_preferences/shared_preferences.dart';

class WordLoader {
  static final Map<String, List<String>> _cachedWordLists = {};

  static Future<List<String>> loadWordList(String language) async {
    if (_cachedWordLists.containsKey(language)) {
      return _cachedWordLists[language]!;
    }

    try {
      String assetPath = "assets/${language}_words.json";
      String jsonString = await rootBundle.loadString(assetPath);
      List<dynamic> wordsJson = json.decode(jsonString);
      List<String> words = wordsJson.cast<String>();
      _cachedWordLists[language] = words;
      return words;
    } catch (e) {
      print("Error loading word list for language '$language': $e");
      return [];
    }
  }

  static Future<bool> isValidWord(String word) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    var language = prefs.getString('selectedLanguage') ?? "english";
    List<String> words = await WordLoader.loadWordList(language);

    List<String> normalizedWords =
        words.map((w) => removeDiacritics(w).toUpperCase()).toList();
    return normalizedWords.contains(word.toUpperCase());
  }

  static List<String> _filterWordsByLength(List<String> words, int length) {
    return words
        .where((word) => word.length == length && !word.contains("-"))
        .toList();
  }

  static String? _selectRandomWord(List<String> words) {
    if (words.isEmpty) {
      return null;
    }
    final random = Random();
    return words[random.nextInt(words.length)];
  }

  static Future<String?> getWordOfLength(int length) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    var language = prefs.getString('selectedLanguage') ?? "english";
    List<String> words = await loadWordList(language);
    List<String> filteredWords = _filterWordsByLength(words, length);
    String? word = _selectRandomWord(filteredWords);
    print(word);
    return word;
  }
}