import 'package:appframe/bloc/web_cubit.dart';
import 'package:appframe/services/dispatcher.dart';

class ChooseImageHandler extends MessageHandler {
  late WebCubit? _webCubit;
  late String? _message;

  @override
  void setCubit(WebCubit cubit) {
    this._webCubit = cubit;
  }

  void _unfollowCubit() {
    this._webCubit = null;
  }

  @override
  void setMessage(String message) {
    this._message = message;
  }

  @override
  Future<dynamic> handleMessage(params) async {
    if (params is! Map<String, dynamic>) {
      throw Exception('参数错误');
    }
    var sourceType = params['sourceType'] as String;
    if (sourceType != 'album' && sourceType != 'camera') {
      throw Exception('参数错误');
    }
    // 暂时忽略对此参数的处理
    List<dynamic>? sizeType;
    if (params.containsKey('sizeType')) {
      sizeType = params['sizeType'] as List<dynamic>;
      if (sizeType.isEmpty || sizeType.length > 2) {
        throw Exception('参数错误');
      }
    }

    int count = 9;
    if (params.containsKey('count')) {
      count = params['count'] as int;
      if (count < 1 || count > 9) {
        throw Exception('参数错误');
      }
    }

    _webCubit!.setChooseImageCmdFlag(true, _message!);
  }
}