package commentser

import (
	"context"
	"videoweb/app/api/proto"
	"videoweb/pub/common/enum/redisconst"
	"videoweb/pub/common/log"
	"videoweb/pub/common/srvdef"
	"videoweb/pub/models/commentlikemod"
	"videoweb/pub/models/commentmod"
	"videoweb/pub/redis"

	"go.mongodb.org/mongo-driver/bson"
)

// SetCommentLike 设置评论点赞状态
func SetCommentLike(ctx context.Context, userId int64, req *proto.CommentLikeSetReq) (*proto.CommentLikeSetResp, *srvdef.SrvErr) {
	if userId <= 0 || req == nil || req.CommentId <= 0 || req.IsLike == nil {
		return nil, srvdef.New(srvdef.ErrParamError, "", "")
	}
	comment, err := commentmod.FindOneComment(ctx, bson.M{
		commentmod.FN.Comment.Id:           req.CommentId,
		commentmod.FN.Comment.ReviewStatus: 1,
	})
	if err != nil {
		return nil, err
	}
	var changed bool
	if *req.IsLike {
		changed, err = commentlikemod.Add(ctx, userId, req.CommentId)
	} else {
		changed, err = commentlikemod.Remove(ctx, userId, req.CommentId)
	}
	if err != nil {
		return nil, err
	}
	count := comment.CountLike
	if changed {
		delta := int64(1)
		if !*req.IsLike {
			delta = -1
		}
		count, err = commentmod.ChangeLikeCount(ctx, req.CommentId, delta)
		if err != nil {
			if *req.IsLike {
				_, _ = commentlikemod.Remove(ctx, userId, req.CommentId)
			} else {
				_, _ = commentlikemod.Add(ctx, userId, req.CommentId)
			}
			return nil, err
		}
	} else {
		current, findErr := commentmod.FindOneComment(ctx, bson.M{commentmod.FN.Comment.Id: req.CommentId})
		if findErr != nil {
			return nil, findErr
		}
		count = current.CountLike
	}
	if cacheErr := redis.Del(redisconst.CommentListCacheKey(comment.ObjectId, comment.ObjectType)); cacheErr != nil {
		log.Warn("SetCommentLike clear cache", log.E(cacheErr))
	}
	return &proto.CommentLikeSetResp{CommentId: req.CommentId, IsLike: *req.IsLike, CountLike: count}, nil
}