package logic

import (
	"context"
	"errors"

	"juwan-backend/app/community/rpc/internal/svc"
	"juwan-backend/app/community/rpc/pb"

	"github.com/zeromicro/go-zero/core/logx"
)

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

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

func (l *UpdatePostLikesLogic) UpdatePostLikes(in *pb.UpdatePostLikesReq) (*pb.UpdatePostLikesResp, error) {
	if in.PostId == nil || in.UserId == nil {
		return nil, errors.New("postId and userId are required")
	}
	postID := in.GetPostId()
	userID := in.GetUserId()

	store := l.svcCtx.Store
	store.Mu.Lock()
	defer store.Mu.Unlock()

	if _, ok := store.Posts[postID]; !ok {
		return nil, errors.New("post not found")
	}
	key := postLikeKey(postID, userID)
	store.PostLikes[key] = &pb.PostLikes{
		PostId:    postID,
		UserId:    userID,
		CreatedAt: nowUnix(in.GetCreatedAt()),
	}

	return &pb.UpdatePostLikesResp{}, nil
}