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

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

func (l *SearchCommentLikesLogic) SearchCommentLikes(in *pb.SearchCommentLikesReq) (*pb.SearchCommentLikesResp, error) {
	limit := in.GetLimit()
	if limit <= 0 {
		limit = 20
	}
	if limit > 100 {
		return nil, errors.New("limit too large")
	}
	offset := in.GetOffset()
	if offset < 0 {
		offset = 0
	}

	store := l.svcCtx.Store
	store.Mu.RLock()
	defer store.Mu.RUnlock()

	filtered := make([]*pb.CommentLikes, 0, len(store.CommentLikes))
	for _, like := range store.CommentLikes {
		if in.GetCommentId() > 0 && like.GetCommentId() != in.GetCommentId() {
			continue
		}
		if in.GetUserId() > 0 && like.GetUserId() != in.GetUserId() {
			continue
		}
		cp := *like
		filtered = append(filtered, &cp)
	}

	if offset >= int64(len(filtered)) {
		return &pb.SearchCommentLikesResp{CommentLikes: []*pb.CommentLikes{}}, nil
	}
	end := offset + limit
	if end > int64(len(filtered)) {
		end = int64(len(filtered))
	}

	return &pb.SearchCommentLikesResp{CommentLikes: filtered[offset:end]}, nil
}