import 'package:flutter/material.dart';
import 'package:image_puzzle/models/api_helper.dart';
import 'package:image_puzzle/models/cached_request.dart';
import 'package:image_puzzle/models/items.dart';
import 'package:image_puzzle/persistence/persistence.dart';
import 'package:logging/logging.dart';

final Logger _log = Logger('data.dart');

class Data {
  final Persistence _persistence;

  ValueNotifier<List<Work>> completedWorks = ValueNotifier([]); // 已完成的图
  ValueNotifier<List<Work>> completedCollections = ValueNotifier([]); // 已完成的收藏图

  Data({required Persistence persistence}) : _persistence = persistence;

  Future<void> loadDataFromPersistence() async {
    completedWorks.value = _persistence.completedWorks;
    completedCollections.value = _persistence.completedCollections;
  }

  // 完成某个作品调用此接口记录到存储中
  // !!! 改造点：接受 ListItem 和可选的耗时
  void workDone(ListItem item, {Duration? timeSpent}) {
    final newWork = Work.fromListItem(item, timeSpent: timeSpent);
    final updatedWorks = [...completedWorks.value, newWork];
    completedWorks.value = updatedWorks;
    _persistence.completedWorks = updatedWorks; // 存储更新后的列表
  }

  // 获取当前的关卡index (基于已完成作品的数量)
  int get currentLevel => completedWorks.value.length;

  // 完成某个collection
  // !!! 改造点：接受 CollectionItem
  void collectionDone(ListItem item) {
    final newCollection = Work.fromListItem(item);
    final updatedCollections = [...completedCollections.value, newCollection];
    completedCollections.value = updatedCollections;
    _persistence.completedCollections = updatedCollections; // 存储更新后的列表
  }

  // 获取当前的合集index (基于已完成收藏的数量)
  int get currentCollectionIndex => completedCollections.value.length;

  CachedRequest? _latest;
  CachedRequest get latest {
    _latest ??= CachedRequest.fromUrl(
      ApiHelper.latestUri,
      transformFunction: (json) async {
        late List<ListItem> list;

        if (json['asset'] != null) {
          // from asset
          list = List<AssetItem>.from((json['data'] as Iterable).map((e) => AssetItem.fromJSON(e)));
        } else {
          // from remote
          list = List<RemoteItem>.from((json['data'] as Iterable).map((e) => RemoteItem.fromJSON(e)));
        }

        return list;
      },
    );
    return _latest!;
  }

  CachedRequest? _collection;
  CachedRequest get collection {
    _collection ??= CachedRequest.fromUrl(
      ApiHelper.collectionUri,
      transformFunction: (json) async {
        late List<ListItem> list;

        if (json['asset'] != null) {
          // from asset
          list = List<AssetItem>.from((json['data'] as Iterable).map((e) => AssetItem.fromJSON(e)));
        } else {
          // from remote
          list = List<RemoteItem>.from((json['data'] as Iterable).map((e) => RemoteItem.fromJSON(e)));
        }

        return list;
      },
    );
    return _collection!;
  }
}