import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';
import '../core/app_colors.dart';

class StorageService {
  static final StorageService instance = StorageService._internal();
  StorageService._internal();

  late SharedPreferences _prefs;

  // Si avvia quando apriamo l'app
  Future<void> init() async {
    _prefs = await SharedPreferences.getInstance();
  }

  // --- IMPOSTAZIONI ---
  int get savedThemeIndex => _prefs.getInt('theme') ?? AppThemeType.cyberpunk.index;
  Future<void> saveTheme(AppThemeType theme) async => await _prefs.setInt('theme', theme.index);

  int get savedRadius => _prefs.getInt('radius') ?? 2;
  Future<void> saveRadius(int radius) async => await _prefs.setInt('radius', radius);

  bool get isMuted => _prefs.getBool('isMuted') ?? false;
  Future<void> saveMuted(bool muted) async => await _prefs.setBool('isMuted', muted);

  // --- STATISTICHE VS CPU ---
  int get wins => _prefs.getInt('wins') ?? 0;
  Future<void> addWin() async => await _prefs.setInt('wins', wins + 1);

  int get losses => _prefs.getInt('losses') ?? 0;
  Future<void> addLoss() async => await _prefs.setInt('losses', losses + 1);

  int get cpuLevel => _prefs.getInt('cpuLevel') ?? 1;
  Future<void> saveCpuLevel(int level) async => await _prefs.setInt('cpuLevel', level);

  // --- MULTIPLAYER ---
  String get playerName => _prefs.getString('playerName') ?? '';
  Future<void> savePlayerName(String name) async => await _prefs.setString('playerName', name);

  // --- STORICO PARTITE ---
  List<Map<String, dynamic>> get matchHistory {
    List<String> history = _prefs.getStringList('matchHistory') ?? [];
    return history.map((e) => jsonDecode(e) as Map<String, dynamic>).toList();
  }

  // Salviamo sia il nostro nome che quello dell'avversario
  Future<void> saveMatchToHistory({required String myName, required String opponent, required int myScore, required int oppScore, required bool isOnline}) async {
    List<String> history = _prefs.getStringList('matchHistory') ?? [];

    Map<String, dynamic> match = {
      'date': DateTime.now().toIso8601String(),
      'myName': myName,
      'opponent': opponent,
      'myScore': myScore,
      'oppScore': oppScore,
      'isOnline': isOnline,
    };

    // Aggiungiamo in cima (il più recente per primo)
    history.insert(0, jsonEncode(match));

    // Teniamo solo le ultime 50 partite per non intasare la memoria
    if (history.length > 50) {
      history = history.sublist(0, 50);
    }

    await _prefs.setStringList('matchHistory', history);
  }
}