demo/xinhuaribao/lib/provider/video_commend_provider.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:news_app/http/http_util.dart';
import 'package:news_app/http/model_parser.dart';

import '../constant/api_const.dart';
import '../model/video_new_model.dart';
import '../ui/me/user_favorite_page.dart';

/// @author: bo.zeng
/// @email: cnhbwds@gmail.com
/// @date: 2025 2025/4/21 11:40
/// @description:

class VideoRecommendProvider extends Notifier<List<VideoNewModel>> {
  @override
  List<VideoNewModel> build() {
    return const <VideoNewModel>[];
  }

  Future<void> fetchRecommendVideos() async {
    try {
      final jsonData = await HttpUtil().get(apiVideoRecommend);

      // 确保 jsonData 是一个 List
      if (jsonData == null) {
        state = const <VideoNewModel>[];
        return;
      }

      // 如果 jsonData 是 Map 且有 data 字段，提取 data
      final List<dynamic> dataList;
      if (jsonData is Map) {
        final data = jsonData['data'];
        if (data is List) {
          dataList = data;
        } else {
          state = const <VideoNewModel>[];
          return;
        }
      } else if (jsonData is List) {
        dataList = jsonData;
      } else {
        state = const <VideoNewModel>[];
        return;
      }

      final data = ModelParser.parseList<VideoNewModel>(
        dataList,
        VideoNewModel.fromJson,
      );
      state = data;
    } catch (e) {
      // 出错时保持空列表状态
      state = const <VideoNewModel>[];
    }
  }

  Future<void> fetchVideoLike({
    required String? videoId,
    required bool current,
  }) async {
    if (videoId == null || videoId.isEmpty) {
      return;
    }
    final jsonData = await HttpUtil().get(
      current ? apiVideoCancelLike : apiVideoLike,
      queryParameters: {"videoId": videoId},
    );
    if (jsonData == true) {
      //修改成功后，把state列表中的item likeCount+1
      if (current) {
        state =
            state.map((video) {
              if (video.contentId == videoId) {
                return video.copyWith(
                  likeCount: (video.likeCount ?? 1) - 1,
                  isLiked: false,
                );
              }
              return video;
            }).toList();
      } else {
        state =
            state.map((video) {
              if (video.contentId == videoId) {
                return video.copyWith(
                  likeCount: (video.likeCount ?? 0) + 1,
                  isLiked: true,
                );
              }
              return video;
            }).toList();
      }
    }
  }

  Future<void> fetchVideoFavorite({
    required String? videoId,
    required bool current,
  }) async {
    if (videoId == null || videoId.isEmpty) {
      return;
    }
    final jsonData = await HttpUtil().get(
      current ? apiVideoCancelFavorite : apiVideoFavorite,
      queryParameters: {"videoId": videoId},
    );
    if (jsonData == true) {
      //修改成功后，把state列表中的item likeCount+1
      if (current) {
        state =
            state.map((video) {
              if (video.contentId == videoId) {
                return video.copyWith(
                  favoriteCount: (video.favoriteCount ?? 1) - 1,
                  isFavorite: false,
                );
              }
              return video;
            }).toList();
        ref.read(favoriteVideoProvider.notifier).removeItemByContentId(videoId);
      } else {
        state =
            state.map((video) {
              if (video.contentId == videoId) {
                return video.copyWith(
                  favoriteCount: (video.favoriteCount ?? 0) + 1,
                  isFavorite: true,
                );
              }
              return video;
            }).toList();
      }
    }
  }

  Future<void> fetchVideoShare({required String? contentId}) async {
    if (contentId == null || contentId.isEmpty) {
      return;
    }
    final jsonData = await HttpUtil().get(
      apiVideoShare,
      queryParameters: {"contentId": contentId},
    );
    if (jsonData == true) {
      state =
          state.map((video) {
            if (video.contentId == contentId) {
              return video.copyWith(shareCount: (video.shareCount ?? 0) + 1);
            }
            return video;
          }).toList();
    }
  }
}