package logic

import (
	"context"
	"slowwild/internal/errorx"
	"slowwild/internal/model"
	"slowwild/internal/svc"

	"git.banshen.xyz/huangguangrong/slow_wild_protobuff/slowwild/slowwildserver"

	"time"

	"slowwild/internal/constants"

	"github.com/spf13/cast"
	"github.com/zeromicro/go-zero/core/logx"
	"gorm.io/gorm"
)

type PostCommentUpvoteLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewPostCommentUpvoteLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PostCommentUpvoteLogic {
	return &PostCommentUpvoteLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// 评论点赞
func (l *PostCommentUpvoteLogic) PostCommentUpvote(in *slowwildserver.PostCommentUpvoteReq) (*slowwildserver.PostCommentUpvoteRsp, error) {
	// 从context中获取userId
	userId, err := cast.ToInt64E(l.ctx.Value(constants.UserIDKey))
	if err != nil {
		return nil, errorx.ErrInvalidParam
	}

	if in.CommentId <= 0 {
		return nil, errorx.ErrInvalidParam
	}

	// 开启事务
	err = l.svcCtx.UserModel.Transaction(l.ctx, func(tx *gorm.DB) error {
		commentModel := model.NewCommentModel(tx, l.svcCtx.Redis)
		messageModel := model.NewMessageModel(tx)

		// 获取评论/回复信息
		comment, err := commentModel.GetComment(l.ctx, in.CommentId)
		if err != nil {
			return err
		}

		// 检查是否已经点赞
		isUpvoted, err := commentModel.IsCommentUpvotedByUser(l.ctx, userId, in.CommentId)
		if err != nil {
			return err
		}

		if !isUpvoted {
			// 创建点赞记录
			upvote := &model.CommentUpvote{
				Model: &model.Model{
					CreatedOn:  time.Now().Unix(),
					ModifiedOn: time.Now().Unix(),
				},
				UserId:     userId,
				CommentId:  in.CommentId,
				ActionType: in.CommentType, // 0-评论点赞 1-回复点赞
			}
			if err := commentModel.CreateCommentUpvote(l.ctx, upvote); err != nil {
				return err
			}

			// 增加点赞数
			if err := commentModel.IncrementUpvoteCount(l.ctx, in.CommentId, 1); err != nil {
				return err
			}

			// 如果不是给自己点赞，发送消息通知
			if comment.UserId != userId {
				notificationType := 3 // 评论通知
				if in.CommentType == 1 {
					notificationType = 4 // 回复通知
				}
				err = messageModel.SendNotification(l.ctx, userId, comment.UserId, int8(notificationType),
					"点赞通知",
					"有人点赞了你的评论",
					comment.PostId, in.CommentId, 0)
				if err != nil {
					return err
				}
			}
		} else {
			// 取消点赞
			if err := commentModel.DeleteCommentUpvote(l.ctx, userId, in.CommentId); err != nil {
				return err
			}

			// 减少点赞数
			if err := commentModel.IncrementUpvoteCount(l.ctx, in.CommentId, -1); err != nil {
				return err
			}
		}

		return nil
	})

	if err != nil {
		l.Logger.Errorf("评论点赞失败: %v", err)
		return nil, errorx.NewCodeError(20007, "评论点赞失败")
	}

	return &slowwildserver.PostCommentUpvoteRsp{}, nil
}