import type { z } from "zod";
import { type LinkRow, linkSchema } from '../dto/stack';

export type TechInput = z.infer<typeof linkSchema>;

/**
 * Convert UI‑level “tech” objects into Link rows for bulk insert.
 */
export function techsToLinks(links: TechInput[], stackId: number) {
  return links.map(
    ({ title, url, description }) => ({
      title,
      url,
      description: description ?? null,
      stackId,
    }),
  ) as Omit<LinkRow, "id" | "createdAt">[];

 }

 /**
 * Fold Link rows back into distinct tech objects for the API layer.
 */
 export function linksToTechs(rows: LinkRow[]): TechInput[] {
   return rows.map(({ title, url, description }) => ({
     title,
     url,
     description: description ?? undefined,
   }));

 }