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

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

// -----------------------postLikes-----------------------
func (l *AddPostLikesLogic) AddPostLikes(in *pb.AddPostLikesReq) (*pb.AddPostLikesResp, error) {
	// todo: add your logic here and delete this line
	if in.GetPostId() <= 0 || in.GetUserId() <= 0 {
		return nil, errors.New("postId and userId are required")
	}

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

	post, ok := store.Posts[in.GetPostId()]
	if !ok || post.GetDeletedAt() > 0 {
		return nil, errors.New("post not found")
	}

	key := postLikeKey(in.GetPostId(), in.GetUserId())
	if _, exists := store.PostLikes[key]; exists {
		return &pb.AddPostLikesResp{}, nil
	}

	store.PostLikes[key] = &pb.PostLikes{
		PostId:    in.GetPostId(),
		UserId:    in.GetUserId(),
		CreatedAt: nowUnix(in.GetCreatedAt()),
	}
	post.LikeCount++

	return &pb.AddPostLikesResp{}, nil
}