import "dart:convert";
import "package:flutter/foundation.dart";
import "package:hive_flutter/hive_flutter.dart";
import "../models/brr_state.dart";

class StorageService {
  static const _boxName = "brr_box";
  static const _stateKey = "brr_state";

  Future<Box<String>> _openBox() => Hive.openBox<String>(_boxName);

  Future<void> saveState(BRRState state) async {
    final box = await _openBox();
    await box.put(_stateKey, jsonEncode(state.toJson()));
  }

  Future<BRRState?> loadState() async {
    final box = await _openBox();
    final jsonString = box.get(_stateKey);

    if (jsonString == null) return null;

    try {
      return BRRState.fromJson(jsonDecode(jsonString) as Map<String, dynamic>);
    } catch (e, stackTrace) {
      debugPrint("[StorageService] loadState failed: $e");
      debugPrintStack(stackTrace: stackTrace);
      return null;
    }
  }

  Future<void> clearState() async {
    final box = await _openBox();
    await box.delete(_stateKey);
  }
}