import 'dart:developer';
import 'dart:io';
import 'package:elysia/plugin/MD5.dart';
import 'package:path_provider/path_provider.dart';
import 'package:hive_flutter/hive_flutter.dart';
import '../bean/Mappable.dart';

class HiverCache {
  static late Box box;

  static Future<void> init(String userName) async {
    userName = MD5(userName).toString();
    final cache = await getApplicationCacheDirectory();
    final cacheDir = Directory("${cache.path}/user_data/");
    if (!await cacheDir.exists()) {
      await cacheDir.create(recursive: true);
    }

    await Hive.initFlutter(cacheDir.path.toString());
    await Hive.openBox(userName);
    box = Hive.box(userName);
  }

  /// 存储 List<Mappable>，内部自动转 Map
  static Future<void> cache<T extends Mappable>(String warehouse, List<T> data) async {
    List<Map<String, dynamic>> mapList = data.map((e) => e.toMap()).toList();
    await box.delete(warehouse);
    await box.flush();
    await box.put(warehouse, mapList);
    await HiverCache.box.flush();
    await HiverCache.box.compact();
  }

  /// 获取 List<Mappable>，需要传入 fromMap 函数
  static Future<List<T>?> getCache<T>(String warehouse, T Function(Map<String, dynamic>) fromMap) async {
    List? mapList = box.get(warehouse) as List?;
    if (mapList == null) return null;

    return mapList.map((e) => fromMap(Map<String, dynamic>.from(e))).toList();
  }

}