import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';

class GetStorageService extends GetxService {
  final GetStorage _box = GetStorage();

  // CREATE / UPDATE
  Future<void> save<T>(String key, T value) async {
    await _box.write(key, value);
  }

  // READ
  T? get<T>(String key) {
    return _box.read<T>(key);
  }

  // READ mit Defaultwert
  T getOrDefault<T>(String key, T defaultValue) {
    return get<T>(key) ?? defaultValue;
  }

  // DELETE
  Future<void> delete(String key) async {
    await _box.remove(key);
  }

  // EXISTS
  bool exists(String key) {
    return _box.hasData(key);
  }

  // CLEAR ALL
  Future<void> clear() async {
    await _box.erase();
  }

  // READ LIST
  List<T> getList<T>(String key) {
    final data = _box.read<List<dynamic>>(key);
    return data?.cast<T>() ?? <T>[];
  }

  // SAVE LIST
  Future<void> saveList<T>(String key, List<T> items) async {
    await _box.write(key, items);
  }

  // ADD ITEM
  Future<void> addItem<T>(String key, T item) async {
    final items = getList<T>(key);
    items.add(item);
    await saveList<T>(key, items);
  }

  // UPDATE ITEM
  Future<void> updateItem<T>(String key, int index, T item) async {
    final items = getList<T>(key);

    if (index < 0 || index >= items.length) {
      throw RangeError.index(index, items);
    }

    items[index] = item;
    await saveList<T>(key, items);
  }

  // DELETE ITEM
  Future<void> deleteItem<T>(String key, int index) async {
    final items = getList<T>(key);

    if (index < 0 || index >= items.length) {
      throw RangeError.index(index, items);
    }

    items.removeAt(index);
    await saveList<T>(key, items);
  }

  Future<void> saveModelList(
    String key,
    List<Map<String, dynamic>> items,
  ) async {
    await _box.write(key, items);
  }

  List<Map<String, dynamic>> getModelList(String key) {
    final data = _box.read<List<dynamic>>(key) ?? [];

    return data.map((item) => Map<String, dynamic>.from(item as Map)).toList();
  }
}