import 'dart:io';

import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'package:path/path.dart' as path;
import 'package:path_provider/path_provider.dart';

import '../tools_base/cache/dio_file_service.dart';

/// 视频缓存
class VideoCacheManager extends CacheManager {
  static const key = "videoCache";

  static VideoCacheManager? _instance;

  factory VideoCacheManager() {
    _instance ??= VideoCacheManager._(fileService: DioFileService());
    return _instance!;
  }

  VideoCacheManager._({required FileService fileService})
      : super(Config(
          key,
          stalePeriod: const Duration(days: 100),
          maxNrOfCacheObjects: 200,
          fileService: fileService,
        ));

  /// 缓存存储路径
  Future<String?> getFilePath() async {
    final dir = await getCommonDir();
    return dir == null ? null : path.join(dir.path, key);
  }

  /// 获取公用的dir目录
  static Future<Directory?> getCommonDir() {
    if (Platform.isIOS) return getTemporaryDirectory();
    if (Platform.isAndroid) return getExternalStorageDirectory();
    //桌面/其它平台用 app support 目录
    if (Platform.isFuchsia || Platform.isMacOS || Platform.isLinux || Platform.isWindows) {
      return getApplicationSupportDirectory();
    }
    return getExternalStorageDirectory();
  }
}